HomeMy WebLinkAboutCIC Supplemental Specs - Previous Approved by Iowa City Council Resolution 22-11 on January 18, 2022
SUPPLEMENTAL SPECIFICATIONS
January 2022
Supplemental Specifications Table of Contents
City of Iowa City i January 2022
TABLE OF CONTENTS
Division 1 - General Provisions and Covenants ........................................................................................ 1-1
Section 1010 – Definitions ................................................................................................................... 1-2
Section 1020 – Proposal Requirements and Conditions ..................................................................... 1-3
Section 1030 – Approval for Award and Award of Contract ................................................................ 1-4
Section 1040 – Scope of Work ............................................................................................................ 1-4
Section 1050 – Control of Work ........................................................................................................... 1-6
Section 1060 – Control of Materials .................................................................................................... 1-6
Section 1070 – Legal Relations and Responsibility to the Public ....................................................... 1-6
Section 1080 – Prosecution and Progress .......................................................................................... 1-8
Section 1090 – Measurement and Payment ....................................................................................... 1-9
Division 2 - Earthwork ................................................................................................................................ 2-1
Section 2010 – Earthwork, Subgrade, and Subbase .......................................................................... 2-2
Division 3 - Trench and Trenchless Construction ..................................................................................... 3-1
Section 3010 – Trench Excavation and Backfill .................................................................................. 3-2
Section 3020 – Trenchless Construction (Boring, Jacking, and Tunneling) ..................................... 3-11
Division 4 - Sewers and Drains ................................................................................................................. 4-1
Section 4010 – Sanitary Sewers ......................................................................................................... 4-2
Section 4020 – Storm Sewers ............................................................................................................. 4-6
Section 4040 – Subdrains and Footing Drain Collectors .................................................................... 4-9
Section 4050 – Pipe Rehabilitation...................................................................................................... 4-9
Section 4060 – Cleaning, Inspection, and Testing of Sewers ........................................................... 4-10
Division 5 - Water Mains and Appurtenances ........................................................................................... 5-1
Section 5010 – Pipe and Fittings ......................................................................................................... 5-2
Section 5011 – Fusible PVC and HDPE Pipe ................................................................................... 5-11
Section 5020 – Valves, Fire Hydrants, and Appurtenances .............................................................. 5-11
Section 5030 – Testing and Disinfection ........................................................................................... 5-18
Division 6 - Structures for Sanitary and Storm Sewers ............................................................................. 6-1
Section 6010 – Structures for Sanitary and Storm Sewers ................................................................. 6-2
Section 6020 – Rehabilitation of Existing Manholes ......................................................................... 6-14
Division 7 - Streets and Related Work ...................................................................................................... 7-1
Section 7010 – Portland Cement Concrete Pavement........................................................................ 7-2
Section 7011 – Portland Cement Concrete Overlays.......................................................................... 7-3
Section 7020 – Hot Mix Asphalt Pavement ......................................................................................... 7-3
Supplemental Specifications Table of Contents
City of Iowa City ii January 2022
Section 7021 – Hot Mix Asphalt Overlays ........................................................................................... 7-3
Section 7030 – Sidewalks, Shared Use Paths, And Driveways .......................................................... 7-4
Section 7040 – Pavement Rehabilitation ............................................................................................ 7-6
Section 7060 – Bituminous Seal Coat ................................................................................................. 7-7
Section 7090 – Cold-in-Place Pavement Recylcing ............................................................................ 7-7
Section 7091 – Full Depth Reclamation .............................................................................................. 7-7
Section 7092 – Crack and Seat Existing PCC Pavement ................................................................... 7-7
Division 8 - Traffic Control ......................................................................................................................... 8-1
Section 8010 – Traffic Signals ............................................................................................................. 8-2
Section 8020 – Pavement Markings .................................................................................................... 8-9
Section 8030 – Temporary Traffic Control .......................................................................................... 8-9
Division 9 - Site Work and Landscaping .................................................................................................... 9-1
Section 9010 – Seeding ...................................................................................................................... 9-2
Section 9030 – Plant Material and Planting ........................................................................................ 9-2
Section 9072 – Combined Concrete Sidewalk and Retaining Wall ..................................................... 9-3
* Division 10 – Demolition
* Division 11 – Miscellaneous
* Divisions listed above in grey-italicized font do not have supplemental specifications.
DIVISION 1 -
GENERAL PROVISIONS AND
COVENANTS
Supplemental Specifications Division 1 – General Provisions and Covenants
City of Iowa City 1-2 January 2022
SECTION 1010 – DEFINITIONS
1.03 DEFINITIONS AND TERMS
BID SECURITY. (REPLACE) The security furnished by the bidder with its bid as guaranty that the
bidder will execute the contract and furnish bond for the work if the proposal is accepted. The
security shall be according to Iowa Code Chapter 26 and shall be in the amount of 10% of the bid
unless otherwise required in the Purchasing Policy or the Contract Documents.
(ADD) BIDDER STATUS FORM. A form providing business organization information to be
completed by the Contractor and submitted with the Proposal, in accordance with the
Specifications.
COMPETITIVE QUOTATION. (REPLACE) A properly signed written offer of the Contractor
according to Iowa Code Chapter 26 and the Purchasing Policy.
(ADD) COMPLETION DATE. The Final Completion Date as defined in this section.
(ADD) CONTRACT COMPLIANCE PROGRAM. The City of Iowa City Contract Compliance
Program effective at the date of publication of the Notice to Bidders unless a different effective date
is identified in the Contract Documents.
CONTRACTING AUTHORITY. (REPLACE) City of Iowa City, Iowa, a municipal corporation.
ENGINEER. (REPLACE) The City Engineer or their designee.
(ADD) FINAL COMPLETION DATE. For completion date contracts, the final completion date is
typically thirty calendar days after the Substantial Completion Date unless otherwise specified in
the Contract Documents. Between the Substantial and Final Completion Dates, only minor work
items (e.g. cleanup or punch list items) should remain. On or before the Final Completion Date,
the Contractor shall complete the Work to the satisfaction of the Jurisdiction and be ready for
Acceptance and Final Payment as detailed in Section 1090, 1.08 – Acceptance and Final Payment.
GOVERNMENTAL ENTITY. (REPLACE) City of Iowa City, Iowa, a municipal corporation.
JURISDICTION. (REPLACE) City of Iowa City, Iowa, a municipal corporation.
(ADD) PROJECT MANUAL. The bound documentary information prepared for bidding and
constructing the Work. The list of the contents of the Project Manual, which may be bound in one
or more volumes, is contained in the table(s) of contents within the Project Manual. The Project
Manual is the basis for developing the Contract and Contract Documents.
(ADD) PURCHASING POLICY. The City of Iowa City Purchasing Policy Manual effective at the
date of publication of the Notice to Bidders unless a different effective date is identified in the
Contract Documents.
(ADD) RECORD DOCUMENTS. A maintained copy, recording actual changes in the Materials or
Work, of the Project Manual, Addenda, Change Orders, Shop Drawings, manufacturer’s
information, and other modifications to the Contract Documents.
(ADD) SUBSTANTIAL COMPLETION DATE. For completion date contracts, substantial
completion is the state in the progress of Work when the Work or designated portion thereof is
Supplemental Specifications Division 1 – General Provisions and Covenants
City of Iowa City 1-3 January 2022
complete in accordance with the Contract Documents so the public can occupy or utilize the Work
for its intended use. Project specific requirements to meet substantial completion can be specified
in the Contract Documents. Minor work items (e.g. cleanup or punch list items), as determined by
the Jurisdiction, might remain to be completed before the Final Completion Date.
(ADD) WAGE THEFT POLICY. The City of Iowa City Wage Theft Policy effective at the date of
publication of the Notice to Bidders unless a different effective date is identified in the Contract
Documents.
SECTION 1020 – PROPOSAL REQUIREMENTS AND CONDITIONS
1.03 QUANTITIES AND UNIT PRICES
B. (REPLACE) When unit prices are requested in the proposal form, the quantities indicated on
the proposal form are approximate only, and do not constitute a warranty or guarantee by the
Jurisdiction as to the actual quantities involved in the work. Such quantities are to be used for
the purpose of comparison of bids and determining the amount of bid security, contract, and
performance, payment, and maintenance bond. In the event of discrepancies between unit
prices and unit price extensions listed in a bidder’s proposal, unit prices shall govern and unit
price extensions shall be corrected, as necessary, for agreement with unit prices. The
Jurisdiction expressly reserves the right to increase or decrease the quantities during
construction as outlined in Section 1040, 1.06 – Increase or Decrease of Work, and to make
reasonable changes in design, provided such changes do not materially change the intent of
the contract, as determined by the Engineer. The amount of work to be paid for shall be based
upon the actual quantities performed.
1.08 TAXES
B. Alternate Sales and Use Tax: (REPLACE) If the Jurisdiction, at its option, decides to utilize
the sales and use tax option, it will so state by special provision and publication in the Notice
of Public Hearing.
1.12 SUBMISSION OF THE PROPOSAL
A. (REPLACE) The proposal shall be sealed in an envelope, properly identified as the proposal
with the project title and the name and address of the bidder, and deposited with the Jurisdiction at
or before the time and at the place provided in the Notice to Bidders and/or the Instructions to
Bidders. It is the sole responsibility of the bidder to see its proposal is delivered to the Jurisdiction
prior to the time for opening bids, along with the appropriate bid security sealed in the separate
envelope identified as bid security and attached to the outside of the bid proposal envelope. Any
proposal received after the scheduled time for the receiving of proposals will be returned to the
bidder unopened and will not be considered. If the Jurisdiction provides envelopes for proposals
and bid security, bidders shall be required to utilize such envelopes in the submission of their bids.
1.14 OPENING OF PROPOSALS
(REPLACE) At the time and place set forth in the Project Manual, proposals will be opened and
read aloud. Proposals will be rejected if not accompanied by a bidder status form and a bid security
(if required in the Project Manual) submitted in a separate, marked envelope. Submittals that do
not include acknowledgement of each addendum will be rejected, except in those instances, in the
opinion of the Engineer, where the addendum not acknowledged by a bidder will have no effect on
the bid amount. Bid openings will be open to the public.
Supplemental Specifications Division 1 – General Provisions and Covenants
City of Iowa City 1-4 January 2022
SECTION 1030 – APPROVAL FOR AWARD AND AWARD OF CONTRACT
1.02 RELEASE OF BID SECURITY
(REPLACE) Release of bid security shall be in accordance with Iowa Code Chapter 26.
1.03 AWARD OF CONTRACT
A. Contract Document Submittal: (REPLACE) Within 10 calendar days after notification by the
Engineer, unless otherwise provided in the contract documents, the Contractor shall present
the signed and executed contract documents, including contract, performance, payment, and
maintenance bond; certificate of insurance; and all other items required by the contract
documents. The performance, payment, and maintenance bond and insurance certificate shall
meet the requirements of Section 1070, Part 3 - Bonds and Insurance as required by the
Jurisdiction. The Contractor must demonstrate an active subscription to Doc Express (program
by Into Tech, Inc.) is maintained. The Jurisdiction will thereupon receive and file such
documents and award the contract.
SECTION 1040 – SCOPE OF WORK
1.03 COORDINATION OF SPECIFICATIONS, PLANS, AND SPECIAL PROVISIONS
A. (REPLACE) In case of any discrepancy between the various items included in the Contract
Documents, the items shall prevail, or govern, in the following descending order:
1. Change Orders
2. Contract
3. Addenda
4. Proposal
5. Special Provisions
6. Plans, including plan notes
7. Supplemental Specifications
8. General Supplemental Specifications
9. SUDAS Standard Specifications
In case of a discrepancy within any contract document, the following shall prevail, or govern, in
descending order: written text, numerals, drawings.
1.05 PLANS
(ADD) As part of the requirements for Section 1090, 1.08 – Acceptance and Final Payment, Record
Documents must be developed and submitted to the Engineer. The percentage markup to be
allowed to the Contractor for extra work performed by a Subcontractor shall be in accordance with
Section 1090, 1.04.C.
Supplemental Specifications Division 1 – General Provisions and Covenants
City of Iowa City 1-5 January 2022
1.07 CHANGE ORDERS
B. Written Orders: (REPLACE) The Engineer may in his/her discretion, and subject to formal
approval as described in the Purchasing Policy, issue written change orders changing the
scope of the work and/or adjusting the amount to be paid to the Contractor for performing such
work; however, the Engineer may, in case of emergency of endangering life or property, orally
authorize such a change order as allowed by the Purchasing Policy. Each written change order
for extra work shall be explicit in its instruction and shall be duly executed by the Jurisdiction.
One copy of said change order shall be filed with the Contractor. Each change order shall
stipulate the amount and method of payment.
C. (ADD) Change orders will be processed through Doc Express, a program by Info Tech, Inc.
1.10 DISPUTED CLAIMS FOR EXTRA COMPENSATION
C. (DELETE) Request for Arbitration: In the event a Contractor's claim as outlined in the above
procedure has been disallowed, in whole or in part, the Contractor may, within 30 calendar
days from the date the ruling of the Jurisdiction is mailed, make a written request to the
Jurisdiction that its claim or claims be submitted to a board of arbitration. The Jurisdiction shall
decide if the matter is subject to arbitration and shall, within 30 calendar days of the receipt of
the request for arbitration, grant or deny the request for arbitration. The Jurisdiction's decision
shall be final.
D. (DELETE) Board of Arbitration and all subsections.
E. (DELETE) Arbitration Proceedings: The board of arbitration shall make its own rules of
procedure and shall have authority to examine records kept by the Jurisdiction and the
Contractor. If the desired records are not produced within 10 calendar days after they are
requested, the board of arbitration shall proceed without them as best it may. Notification of
arbitration proceedings shall be made by the arbitration board to both the Jurisdiction and the
Contractor, and each shall have the opportunity to attend all sessions of the arbitration board.
In determining the findings or award or both, a majority vote of the board shall govern. Copies
of the findings or award or both, signed by the arbitrators, shall be filed with the Jurisdiction
and the Contractor. A unanimous report or majority report may be used. The board of
arbitration shall fix the cost of the proceedings, including a reasonable compensation to the
arbitrators, and shall determine how the total cost shall be borne by the parties.
F. (DELETE) Jurisdiction of Board of Arbitration: The board of arbitration shall have
jurisdiction to pass upon questions involving compensation to the Contractor for work actually
performed or materials furnished and upon claims for extra compensation that have not been
allowed by the Jurisdiction. The board's jurisdiction shall not extend to a determination of
quality of workmanship or materials furnished, or to an interpretation of the intent of the plans
and specifications except as to matters of compensation. Jurisdiction of the board shall not
extend to setting aside or modifying the terms or requirements of the contract.
G. (DELETE) Determination of Board of Arbitration Final: The findings or award, or both, of
the arbitration board, if acceptable to both parties to the contract, may become a basis for final
payment. If the findings of the arbitration board are unacceptable to either party to the contract,
said findings may become the basis for further negotiation between the parties. In the event a
solution agreeable to both parties has not been reached through the filing of a claim, through
arbitration, or if arbitration has been denied, either party may resort to whatever other methods
for resolving the claim are available to it. The Contractor shall not initiate any suit against the
Supplemental Specifications Division 1 – General Provisions and Covenants
City of Iowa City 1-6 January 2022
Jurisdiction for the adjudication of any claim until said claim has been first presented to the
Jurisdiction, pursuant to this article, and either submitted to arbitration or a request for
arbitration is denied.
SECTION 1050 – CONTROL OF WORK
1.05 SHOP DRAWINGS, CERTIFICATES, AND EQUIPMENT LISTS
A. Submission of Drawings:
1. (REPLACE) The Contractor shall submit to the Engineer all shop drawings and equipment
drawings or lists in Doc Express (a program by Info Tech, Inc.) or as requested by the
Engineer. Drawings and listings shall be complete and shall contain all required detail
information conveyed according to the latest recommended standards for detailing.
Submitted materials shall be placed in the correct Doc Express Drawer and files named
according to the most recent version of the Iowa DOT Doc Express Drawers, Document
Types, and Naming Convention (the October 2021 version is found at:
https://iowadot.gov/local_systems/pdfs/Naming_Convention_2021.pdf).
SECTION 1060 – CONTROL OF MATERIALS
1.08 BULK WATER USE
A. The Contractor can use bulk water in a tanker truck, use a meter installed by the City of Iowa
City, or provide water by another method approved by the Engineer. Utilize an approved
double check backflow assembly or open gap.
1. Tanker Trucks Using Bulk Water Stations:
a) Tanker trucks can be filled at two bulk water stations in Iowa City. This water is not to
be used for drinking or cooking, only for contractors. To use this service, tokens must
be purchased during office hours at Iowa City Transit, 1200 South Riverside Drive, or
from the Revenue Counter at City Hall, 410 East Washington Street. Tokens are 50
cents per 100 gallons of water.
2. Bulk Water Station Locations:
a) Iowa City Transit, 1200 South Riverside Drive, available 24 hours per day and 7 days
per week, except for winter months.
b) East Side Recycling Center, 2401 South Scott Boulevard, during regular business
hours.
3. Contact Neighborhood and Development Services (NDS), during regular business hours,
for arranging a meter on an approved hydrant location.
SECTION 1070 – LEGAL RELATIONS AND RESPONSIBILITY TO THE PUBLIC
1.01 MUNICIPAL REGULATIONS, STATE, AND FEDERAL LAWS AND REGULATIONS
C.
Supplemental Specifications Division 1 – General Provisions and Covenants
City of Iowa City 1-7 January 2022
2. Nondiscrimination: (REPLACE) Neither the Contractor nor their subcontractors, shall
employ any person whose physical or mental condition is such that his/her employment
will endanger the health and safety of themselves or others employed on the project.
Contractor shall not commit any of the following employment practices and agrees to
include the following clauses in any subcontracts:
To discriminate against any individual in terms, conditions, or privileges of employment
because of age, color, creed, disability (unless such disability is related to job performance
of such person or employee), gender identity, marital status, national origin, race, religion,
sex, sexual orientation, or other class/category protected by federal, state, or local law.
To discharge from employment or refuse to hire any individual because of age, color,
creed, disability (unless such disability is related to job performance of such person or
employee), gender identity, marital status, national origin, race, religion, sex, sexual
orientation, or other class/category protected by federal, state, or local law.
For all contracts of $25,000 or more, the Contractor shall abide by the requirements of the
Contract Compliance Program.
3. (DELETE) Solicitations for Subcontracts, Including Procurement of Materials and
Equipment: In all solicitations either by competitive bidding or negotiation made by the
contractor for work to be performed under a subcontract, including procurement of
materials or leases of equipment, each potential subcontractor or supplier shall be notified
by the contractor of the contractor's obligations under this contract and the Regulations
relative to nondiscrimination on the grounds of race, color, national origin, sex, age, or
disability.
6. (REPLACE) For all contracts of $25,000 or more, the Contractor shall abide by the
requirements of the Wage Theft Policy.
7. (ADD) Incorporation of Provisions: The contractor shall include the provisions of
paragraphs (1) through (7) in every subcontract, including procurement of materials and
leases of equipment, unless exempt by the Regulations, or directives issued pursuant
thereto. The contractor shall take such action with respect to any subcontract or
procurement as the Contracting Authority, the Iowa DOT, or the FHWA may direct as a
means of enforcing such provisions including sanctions for non-compliance: Provided,
however, that, in the event a contractor becomes involved in, or is threatened with, litigation
with a subcontractor or supplier as a result of such direction, the contractor may request
the Contracting Authority or the Iowa DOT to enter into such litigation to protect the
interests of the Contracting Authority or the Iowa DOT; and, in addition, the contractor may
request the United States to enter into such litigation to protect the interests of the United
States.
1.11 BUSINESS ORGANIZATION REQUIREMENTS
E. (ADD) Completed and signed Bidder Status Form shall be included with all bid submissions.
2.07 PROTECTION OF ABOVEGROUND AND UNDERGROUND FACILITIES
E. (ADD) Surface restoration for utility exploration (i.e. pavement replacement, seeding, sodding,
and other vegetation) will be performed at no additional cost to the Jurisdiction.
Supplemental Specifications Division 1 – General Provisions and Covenants
City of Iowa City 1-8 January 2022
3.01 PERFORMANCE, PAYMENT, AND MAINTENANCE BOND
D. (ADD) For all public improvement contracts $25,000 or higher, the contract must be
accompanied by a bond, with surety, conditioned for the faithful performance of the contract,
and for fulfillment of other requirements as provided by Iowa law in accordance with Iowa Code
Section 573.2.
3.02 INSURANCE REQUIREMENTS
A. (REPLACE) The Contractor shall purchase and maintain insurance to protect the Contractor
and the Jurisdiction against all hazards herein enumerated throughout the duration of the
contract. Said insurance shall be provided by an insurance company or companies, “admitted”
or “non-admitted” to do business in the State of Iowa, having an A.M. Best rating of “A” or
better.
C.
2.
c. Operations by independent contractors. (ADD) Includes property damage to work
performed by independent contractors or their subcontractors.
8. (ADD) To the fullest extent permitted by applicable state law, a Waiver of Subrogation
Clause shall be added to the General Liability and Workers’ Compensation policies in favor
of Contractor and Jurisdiction, and this clause shall apply to the Contractor’s and
Jurisdiction’s officers, agents and employees, with respect to all Projects during the policy
term.
SECTION 1080 – PROSECUTION AND PROGRESS
1.01 SUBLETTING OR ASSIGNMENT OF CONTRACT
A. Work by Contractor:
1. (REPLACE) The Contractor shall perform, with its own organization and forces, work
amounting to no less than 30% of the total contract cost.
1.10 CONTRACTOR’S EMPLOYEES, METHODS, AND EQUIPMENT
B. (DELETE) Workers: and all subsections.
1.13 BREACH OF CONTRACT
A.
4. (REPLACE) Contractor's disregard of laws, ordinances, or instructions of the Engineer;
5. (REPLACE) Contractor's failure to provide sufficient workers, equipment, or materials to
ensure the proper and timely completion of the work;
9. (REPLACE) Bankruptcy or insolvency of the Contractor, or the making of an assignment
for the benefit of creditors by the Contractor;
10. (REPLACE) Failure by the Contractor to carry on the work in an acceptable manner; or
Supplemental Specifications Division 1 – General Provisions and Covenants
City of Iowa City 1-9 January 2022
11. (ADD) Assignment of any portion of the contract to a different party without prior written
approval of the Jurisdiction.
SECTION 1090 – MEASUREMENT AND PAYMENT
1.02 SCOPE OF PAYMENT
D. (ADD) Tracking of quantities and payments will be processed through Appia, a program by Info
Tech, Inc., based on the determination in 1090, 1.01.
1.08 ACCEPTANCE AND FINAL PAYMENT
E. (ADD) Contractor shall submit Record Documents including:
1. General:
a. Store Record Document separately and do not use Record Documents in the field for
construction purposes.
b. Protect Record Documents from deterioration and loss in a secure, fire-resistance
location.
c. Provide access to Record Documents for the reference of the Engineer, or their
designee, during normal working hours.
d. Record information concurrent with Section 1080, 1.03 – Work Progress and Schedule,
not less than weekly.
2. Record Documents:
a. Furnish a complete set of Plans to be utilized by Contractor and all Subcontractors for
recording all changes from the Contract Documents.
1) Mark the Plans to show the actual installation where the installation varies from the
Contract Documents.
2) Mark which drawing is most capable of showing conditions fully and accurately.
3) Where Shop Drawings are used, record a cross-reference at the corresponding
location on the Plans.
a) Give particular attention to concealed elements that would be difficult to
measure and record at a later date.
b. Mark record sets legibly in red.
1) Use other colors to distinguish between variations in separate categories of the
Work.
c. Mark new information that is important to the Engineer but was not shown on Plans or
Shop Drawings.
d. Note related Change Order numbers where applicable.
e. Organize Record Documents into manageable sets.
1) Bind sets with durable paper cover sheets; print suitable titles, dates, and other
identification on the cover of each set.
Supplemental Specifications Division 1 – General Provisions and Covenants
City of Iowa City 1-10 January 2022
f. Give particular attention to substitutions and selection of options and information on
concealed construction that cannot otherwise be readily discerned later by direct
observation.
g. Identify and date each Record Document; include designation “PROJECT RECORD
DOCUMENT” in a prominent location.
h. Upon completion of the Work, submit Record Documents to the Engineer.
DIVISION 2 -
EARTHWORK
Supplemental Specifications Division 2 – Earthwork
City of Iowa City 2-2 January 2022
SECTION 2010 – EARTHWORK, SUBGRADE, AND SUBBASE
1.08 MEASUREMENT AND PAYMENT
F. Below Grade Excavation (Core Out): If unsuitable or unstable soil is encountered below the
12 inches of subgrade, measurement and payment for removal and replacement of such
materials is as follows:
3. Includes: (REPLACE) Payment includes, but is not limited to, equipment, tools, labor,
disposal of unsuitable materials, dewatering, drying, furnishing, and placement of
foundation materials as required by the Engineer, compaction and finishing of the
excavated area, and all incidental work as may be required. Foundation materials for this
item shall be Macadam Stone Base (Iowa DOT Gradation #13) unless otherwise approved
by the Engineer.
K. Removals:
1. Structures:
c. Includes: (REPLACE) Unit price includes, but is not limited to, removal, furnishing,
backfilling, and compacting backfill material in the resulting void, and proper disposal
of existing structures. Backfill shall be Class II Material (see Section 3010, 2.03.A –
Class II Material). Backfill material will not be measured separately but shall be
considered incidental.
3.03 EXCAVATION
B. Pavement Removal:
5. (ADD) Pavement removal shall be full panels and extend into the nearest full panel at least
three feet beyond the trench limits, unless approved by the Engineer.
DIVISION 3 -
TRENCH AND TRENCHLESS
CONSTRUCTION
Supplemental Specifications Division 3 – Trench and Trenchless Construction
City of Iowa City 3-2 January 2022
SECTION 3010 – TRENCH EXCAVATION AND BACKFILL
1.08 MEASUREMENT AND PAYMENT
A. General:
5. (REPLACE) Furnishing, placing, and compacting backfill material.
2.03 BACKFILL MATERIAL
A. Class II Material: (REPLACE) Class A Roadstone (Iowa DOT Gradation #11) shall be used
for granular trench backfill unless otherwise approved by the Engineer.
3.04 DEWATERING
A. (REPLACE) Maintain ground water level a minimum of two feet below the bottom of the trench.
3.05 PIPE BEDDING AND BACKFILL
D. Primary and Secondary Backfill:
2. Granular Material:
b. (REPLACE) Compact Class I backfill material to at least 65% relative density.
Compact Class II backfill material to at least 95% Standard Proctor Density.
3. Suitable Backfill Material:
b. (REPLACE) Compact Class II backfill material to 95% Standard Proctor Density.
E. Final Trench Backfill:
3. Class I and Class II Backfill Material:
a. (REPLACE) Under and within five feet of paved surfaces, including streets, sidewalks
and driveways, Class II backfill material is to be compacted to at least 95% Standard
Proctor Density up to the final one foot. The final one foot should be compacted to at
least 98% Standard Proctor Density.
b. (REPLACE) If not under pavement or within five feet of paved surfaces, backfill with
Class II backfill material to within 12 inches of finished surface. Class II backfill material
is to be compacted to at least 95% Standard Proctor Density.
c. (ADD) If Class I backfill material is specified, compact to at least 65% relative density
within right-of-way and at least 50% relative density outside right-of-way.
5. (REPLACE) In areas to remain unpaved and not within five feet of paved surfaces,
terminate backfill material 12 inches below finished grade. Use Class V Material (e.g.
topsoil) for the final 8 inches above trench backfill material. The remaining four inches will
be compacted with the remainder of the backfill according to Section 3010, 3.05.E.4.
FIGURES
(ADD) Figure 3010.201 – Specific Trench Bedding and Backfill Zones
DIVISION
ENGINEERING SPECIFIC TRENCH BEDDING AND BACKFILL ZONES
DIP GRAVITY FLOW SEWERS
UNDER OR WITHIN FIVE FEET OF PAVEMENT
FIGURE 3010.201
SHEET 1 OF 8
TW
BURY DEPTH
OD/2
OD/2
SPRINGLINE OF PIPE
LEGEND
CLASS I BEDDING MATERIAL
CLASS II BACKFILL MATERIAL
OVER-EXCAVATION AND
FOUNDATION STONE
PAVEMENT
SUBBASE
UNDISTURBED EARTH
D
OD/6
d, 4" MIN
FINAL TRENCH BACKFILL
SECONDARY BACKFILL, SEE NOTE 4
PRIMARY BACKFILL, SEE NOTE 3
HAUNCH SUPPORT, SEE NOTE 2
PIPE BEDDING
OVER-EXCAVATION
COMPACT TO AT LEAST 95% STANDARD
PROCTOR DENSITY UP TO THE FINAL
ONE FOOT. THE FINAL ONE FOOT
SHOULD BE COMPACTED TO AT LEAST
98% STANDARD PROCTOR DENSITY.
IF SUBGRADE TREATMENT IS SPECIFIED,
2' MINIMUM OF SUITABLE CLASS III / IVA /
IVB BACKFILL MATERIAL TO BE USED
INSTEAD OF CLASS II BACKFILL MATERIAL
CONSOLIDATE AND MODERATELY
COMPACT BEDDING MATERIAL
AND FOUNDATION STONE, REQUIRED ONLY
WHEN SPECIFIED IN THE CONTRACT
DOCUMENTS OR WHEN DIRECTED BY THE
ENGINEER (SEE 3010, 2.05 AND 3.01.D)
OD
NOTES:
1.REFER TO THE CONTRACT DOCUMENTS FOR SPECIFIC MATERIAL AND PLACEMENT REQUIREMENTS.
2.CONSOLIDATE AND MODERATELY COMPACT BY SLICING WITH A SHOVEL OR USING OTHER
APPROVED TECHNIQUES.
3.COMPACT TO AT LEAST 65% RELATIVE DENSITY.
4.COMPACT TO AT LEAST 95% STANDARD PROCTOR DENSITY.
5.PROTECT PIPE, ACCESSORIES, AND APPURTENANCES DURING PLACEMENT AND COMPACTION OF
BEDDING AND BACKFILL MATERIALS.
KEY:
OD = OUTSIDE DIAMETER OF PIPE
D = INSIDE DIAMETER OF PIPE
TW = MINIMUM TRENCH WIDTH AT TOP OF PIPE =
OD+18" OR 1.25XOD+12" (WHICHEVER IS GREATER)
d = DEPTH OF BEDDING MATERIAL BELOW PIPE
BURY DEPTH
FINAL TRENCH BACKFILL
NOTES:
1.REFER TO THE CONTRACT DOCUMENTS FOR SPECIFIC MATERIAL AND PLACEMENT REQUIREMENTS.
2.CONSOLIDATE AND MODERATELY COMPACT BY SLICING WITH A SHOVEL OR USING OTHER
APPROVED TECHNIQUES.
3.COMPACT TO AT LEAST 65% RELATIVE DENSITY.
4.COMPACT TO AT LEAST 95% STANDARD PROCTOR DENSITY. OBTAIN REQUIRED COMPACTION WITHIN
A SOIL MOISTURE RANGE OF OPTIMUM MOISTURE TO 4% ABOVE OPTIMUM MOISTURE CONTENT.
5.PROTECT PIPE, ACCESSORIES, AND APPURTENANCES DURING PLACEMENT AND COMPACTION OF
BEDDING AND BACKFILL MATERIALS.
SECONDARY BACKFILL, SEE NOTE 4
PRIMARY BACKFILL, SEE NOTE 3
HAUNCH SUPPORT, SEE NOTE 2
PIPE BEDDING
OVER-EXCAVATION
DIVISION
ENGINEERING SPECIFIC TRENCH BEDDING AND BACKFILL ZONES
DIP GRAVITY FLOW SEWERS
IN UNPAVED AREA
FIGURE 3010.201
SHEET 2 OF 8
LEGEND
CLASS I BEDDING MATERIAL
CLASS II BACKFILL MATERIAL
CLASS III / IVA / IVB SUITABLE
BACKFILL MATERIAL
OVER-EXCAVATION AND
FOUNDATION STONE
CLASS V BACKFILL MATERIAL
(E.G. TOPSOIL)
UNDISTURBED EARTH
COMPACT TO AT LEAST 95% STANDARD
PROCTOR DENSITY WITHIN RIGHT-OF-WAY
AND 90% STANDARD PROCTOR DENSITY
OUTSIDE THE RIGHT-OF-WAY; OBTAIN
REQUIRED COMPACTION WITHIN A SOIL
MOISTURE RANGE OF OPTIMUM MOISTURE
TO 4% ABOVE OPTIMUM MOISTURE
CONTENT
AND FOUNDATION STONE, REQUIRED ONLY
WHEN SPECIFIED IN THE CONTRACT
DOCUMENTS OR WHEN DIRECTED BY THE
ENGINEER (SEE 3010, 2.05 AND 3.01.D)
CONSOLIDATE AND MODERATELY
COMPACT BEDDING MATERIAL
TW
OD
KEY:
OD = OUTSIDE DIAMETER OF PIPE
D = INSIDE DIAMETER OF PIPE
TW = MINIMUM TRENCH WIDTH AT TOP OF PIPE =
OD+18" OR 1.25XOD+12" (WHICHEVER IS GREATER)
d = DEPTH OF BEDDING MATERIAL BELOW PIPE
OD/2
OD/2
SPRINGLINE OF PIPE D
OD/6
d, 4" MIN
IF SUBGRADE TREATMENT IS SPECIFIED,
2' MINIMUM OF SUITABLE CLASS III / IVA /
IVB BACKFILL MATERIAL TO BE USED
INSTEAD OF CLASS II BACKFILL MATERIAL
DIVISION
ENGINEERING SPECIFIC TRENCH BEDDING AND BACKFILL ZONES
PRESSURE PIPE - DIP OR PVC (C-900)
UNDER OR WITHIN FIVE FEET OF PAVEMENT
FIGURE 3010.201
SHEET 3 OF 8
TW
OD
FINAL TRENCH BACKFILL
SECONDARY BACKFILL, SEE NOTE 3
D
BURY DEPTH
OD/2
OD/2
PRIMARY BACKFILL, SEE NOTE 3
HAUNCH SUPPORT, SEE NOTE 2
PIPE BEDDING
SPRINGLINE OF PIPE
OVER-EXCAVATION
KEY:
OD = OUTSIDE DIAMETER OF PIPE
D = INSIDE DIAMETER OF PIPE
TW = MINIMUM TRENCH WIDTH AT TOP OF PIPE = OD+18" OR 1.25XOD+12" (WHICHEVER IS GREATER)
d = MINIMUM DEPTH OF BEDDING MATERIAL BELOW PIPE = OD/8 OR 4" (WHICHEVER IS GREATER)
AND FOUNDATION STONE, REQUIRED ONLY
WHEN SPECIFIED IN THE CONTRACT
DOCUMENTS OR WHEN DIRECTED BY THE
ENGINEER (SEE 3010, 2.05 AND 3.01.D)
NOTES:
1.REFER TO THE CONTRACT DOCUMENTS FOR SPECIFIC MATERIAL AND PLACEMENT REQUIREMENTS.
2.CONSOLIDATE AND MODERATELY COMPACT BY SLICING WITH A SHOVEL OR USING OTHER
APPROVED TECHNIQUES.
3.COMPACT TO AT LEAST 95% STANDARD PROCTOR DENSITY.
4.PROTECT PIPE, ACCESSORIES, AND APPURTENANCES DURING PLACEMENT AND COMPACTION OF
BEDDING AND BACKFILL MATERIALS.
LEGEND
CLASS I BEDDING MATERIAL
CLASS II BACKFILL MATERIAL
OVER-EXCAVATION AND
FOUNDATION STONE
PAVEMENT
SUBBASE
UNDISTURBED EARTH
OD/6
d
COMPACT TO AT LEAST 95% STANDARD
PROCTOR DENSITY UP TO THE FINAL ONE
FOOT. THE FINAL ONE FOOT SHOULD BE
COMPACTED TO AT LEAST 98% STANDARD
PROCTOR DENSITY.
CONSOLIDATE AND MODERATELY
COMPACT BEDDING MATERIAL
COMPACT TO AT LEAST 95% STANDARD
PROCTOR DENSITY WITHIN RIGHT-OF-WAY
AND 90% STANDARD PROCTOR DENSITY
OUTSIDE THE RIGHT-OF-WAY; OBTAIN
REQUIRED COMPACTION WITHIN A SOIL
MOISTURE RANGE OF OPTIMUM MOISTURE
TO 4% ABOVE OPTIMUM MOISTURE
CONTENT
SPRINGLINE OF PIPE
DIVISION
ENGINEERING SPECIFIC TRENCH BEDDING AND BACKFILL ZONES
PRESSURE PIPE - DIP OR PVC (C-900)
IN UNPAVED AREA
FIGURE 3010.201
SHEET 4 OF 8
LEGEND
CLASS I BEDDING MATERIAL
CLASS II BACKFILL MATERIAL
CLASS III / IVA / IVB SUITABLE
BACKFILL MATERIAL
OVER-EXCAVATION AND
FOUNDATION STONE
CLASS V BACKFILL MATERIAL
(E.G. TOPSOIL)
UNDISTURBED EARTH
TW
OD
FINAL TRENCH BACKFILL
SECONDARY BACKFILL, SEE NOTE 3
D
BURY DEPTH
OD/2
OD/2
PRIMARY BACKFILL, SEE NOTE 3
HAUNCH SUPPORT, SEE NOTE 2
PIPE BEDDING
OVER-EXCAVATION
KEY:
OD = OUTSIDE DIAMETER OF PIPE
D = INSIDE DIAMETER OF PIPE
TW = MINIMUM TRENCH WIDTH AT TOP OF PIPE = OD+18" OR 1.25XOD+12" (WHICHEVER IS GREATER)
d = MINIMUM DEPTH OF BEDDING MATERIAL BELOW PIPE = OD/8 OR 4" (WHICHEVER IS GREATER)
NOTES:
1.REFER TO THE CONTRACT DOCUMENTS FOR SPECIFIC MATERIAL AND PLACEMENT REQUIREMENTS.
2.CONSOLIDATE AND MODERATELY COMPACT BY SLICING WITH A SHOVEL OR USING OTHER
APPROVED TECHNIQUES.
3.COMPACT TO AT LEAST 95% STANDARD PROCTOR DENSITY.
4.PROTECT PIPE, ACCESSORIES, AND APPURTENANCES DURING PLACEMENT AND COMPACTION OF
BEDDING AND BACKFILL MATERIALS.
OD/6
d AND FOUNDATION STONE, REQUIRED ONLY
WHEN SPECIFIED IN THE CONTRACT
DOCUMENTS OR WHEN DIRECTED BY THE
ENGINEER (SEE 3010, 2.05 AND 3.01.D)
CONSOLIDATE AND MODERATELY
COMPACT BEDDING MATERIAL
DIVISION
ENGINEERING SPECIFIC TRENCH BEDDING AND BACKFILL ZONES
PVC TRUSS PIPE GRAVITY FLOW SEWERS
UNDER OR WITHIN FIVE FEET OF PAVEMENT
FIGURE 3010.201
SHEET 5 OF 8
TW
OD
BURY DEPTH
OD/2
OD/2
SPRINGLINE OF PIPE
OD/6
KEY:
OD = OUTSIDE DIAMETER OF PIPE
D = INSIDE DIAMETER OF PIPE
TW = MINIMUM TRENCH WIDTH AT TOP OF PIPE = OD+18" OR 1.25XOD+12" (WHICHEVER IS GREATER)
d = DEPTH OF BEDDING MATERIAL BELOW PIPE
LEGEND
CLASS I BEDDING MATERIAL
CLASS II BACKFILL MATERIAL
OVER-EXCAVATION AND
FOUNDATION STONE
PAVEMENT
SUBBASE
UNDISTURBED EARTH
D
12" MIN
NOTES:
1.REFER TO THE CONTRACT DOCUMENTS FOR SPECIFIC MATERIAL AND PLACEMENT REQUIREMENTS.
2.CONSOLIDATE AND MODERATELY COMPACT BY SLICING WITH A SHOVEL OR USING OTHER
APPROVED TECHNIQUES.
3.COMPACT TO AT LEAST 65% RELATIVE DENSITY.
4.PROTECT PIPE, ACCESSORIES, AND APPURTENANCES DURING PLACEMENT AND COMPACTION OF
BEDDING AND BACKFILL MATERIALS.
FINAL TRENCH BACKFILL
SECONDARY BACKFILL, SEE NOTE 3
PRIMARY BACKFILL, SEE NOTE 3
HAUNCH SUPPORT, SEE NOTE 2
PIPE BEDDING
OVER-EXCAVATION
COMPACT TO AT LEAST 95% STANDARD
PROCTOR DENSITY UP TO THE FINAL ONE
FOOT. THE FINAL ONE FOOT SHOULD BE
COMPACTED TO AT LEAST 98% STANDARD
PROCTOR DENSITY.
d, 4" MIN AND FOUNDATION STONE, REQUIRED ONLY
WHEN SPECIFIED IN THE CONTRACT
DOCUMENTS OR WHEN DIRECTED BY THE
ENGINEER (SEE 3010, 2.05 AND 3.01.D)
CONSOLIDATE AND MODERATELY
COMPACT BEDDING MATERIAL
IF SUBGRADE TREATMENT IS SPECIFIED,
2' MINIMUM OF SUITABLE CLASS III / IVA /
IVB BACKFILL MATERIAL TO BE USED
INSTEAD OF CLASS II BACKFILL MATERIAL
DIVISION
ENGINEERING SPECIFIC TRENCH BEDDING AND BACKFILL ZONES
PVC TRUSS PIPE GRAVITY FLOW SEWERS
IN UNPAVED AREA
FIGURE 3010.201
SHEET 6 OF 8
SPRINGLINE OF PIPE
LEGEND
CLASS I BEDDING MATERIAL
CLASS II BACKFILL MATERIAL
CLASS III / IVA / IVB SUITABLE
BACKFILL MATERIAL
OVER-EXCAVATION AND
FOUNDATION STONE
CLASS V BACKFILL MATERIAL
(E.G. TOPSOIL)
UNDISTURBED EARTH
TW
OD
12" MIN
BURY DEPTH
OD/2
OD/2
NOTES:
1.REFER TO THE CONTRACT DOCUMENTS FOR SPECIFIC MATERIAL AND PLACEMENT REQUIREMENTS.
2.CONSOLIDATE AND MODERATELY COMPACT BY SLICING WITH A SHOVEL OR USING OTHER
APPROVED TECHNIQUES.
3.COMPACT TO AT LEAST 65% RELATIVE DENSITY.
4.PROTECT PIPE, ACCESSORIES, AND APPURTENANCES DURING PLACEMENT AND COMPACTION OF
BEDDING AND BACKFILL MATERIALS.
KEY:
OD = OUTSIDE DIAMETER OF PIPE
D = INSIDE DIAMETER OF PIPE
TW = MINIMUM TRENCH WIDTH AT TOP OF PIPE = OD+18" OR 1.25XOD+12" (WHICHEVER IS GREATER)
d = DEPTH OF BEDDING MATERIAL BELOW PIPE
FINAL TRENCH BACKFILL
SECONDARY BACKFILL, SEE NOTE 3
PRIMARY BACKFILL, SEE NOTE 3
HAUNCH SUPPORT, SEE NOTE 2
PIPE BEDDING
OVER-EXCAVATIONOD/6
D
d, 4" MIN
COMPACT TO AT LEAST 95% STANDARD
PROCTOR DENSITY WITHIN RIGHT-OF-WAY
AND 90% STANDARD PROCTOR DENSITY
OUTSIDE THE RIGHT-OF-WAY; OBTAIN
REQUIRED COMPACTION WITHIN A SOIL
MOISTURE RANGE OF OPTIMUM MOISTURE
TO 4% ABOVE OPTIMUM MOISTURE
CONTENT
AND FOUNDATION STONE, REQUIRED ONLY
WHEN SPECIFIED IN THE CONTRACT
DOCUMENTS OR WHEN DIRECTED BY THE
ENGINEER (SEE 3010, 2.05 AND 3.01.D)
CONSOLIDATE AND MODERATELY
COMPACT BEDDING MATERIAL
DIVISION
ENGINEERING SPECIFIC TRENCH BEDDING AND BACKFILL ZONES
RCP GRAVITY FLOW SEWERS
UNDER OR WITHIN FIVE FEET OF PAVEMENT
FIGURE 3010.201
SHEET 7 OF 8
TW
BURY DEPTH
OD/2
OD/2
SPRINGLINE OF PIPE
LEGEND
CLASS I BEDDING MATERIAL
CLASS II BACKFILL MATERIAL
OVER-EXCAVATION AND
FOUNDATION STONE
PAVEMENT
SUBBASE
UNDISTURBED EARTH
D
OD/6
d
FINAL TRENCH BACKFILL
NOTES:
1.REFER TO THE CONTRACT DOCUMENTS FOR SPECIFIC MATERIAL AND PLACEMENT REQUIREMENTS.
2.CONSOLIDATE AND MODERATELY COMPACT BY SLICING WITH A SHOVEL OR USING OTHER
APPROVED TECHNIQUES.
3.COMPACT TO AT LEAST 95% STANDARD PROCTOR DENSITY.
4.PROTECT PIPE, ACCESSORIES, AND APPURTENANCES DURING PLACEMENT AND COMPACTION OF
BEDDING AND BACKFILL MATERIALS.
SECONDARY BACKFILL, SEE NOTE 3
PRIMARY BACKFILL, SEE NOTE 3
HAUNCH SUPPORT, SEE NOTE 2
PIPE BEDDING
OVER-EXCAVATION
COMPACT TO AT LEAST 95% STANDARD
PROCTOR DENSITY UP TO THE FINAL
ONE FOOT. THE FINAL ONE FOOT
SHOULD BE COMPACTED TO AT LEAST
98% STANDARD PROCTOR DENSITY.
IF SUBGRADE TREATMENT IS SPECIFIED,
2' MINIMUM OF SUITABLE CLASS III / IVA /
IVB BACKFILL MATERIAL TO BE USED
INSTEAD OF CLASS II BACKFILL MATERIAL
CONSOLIDATE AND MODERATELY
COMPACT BEDDING MATERIAL
AND FOUNDATION STONE, REQUIRED ONLY
WHEN SPECIFIED IN THE CONTRACT
DOCUMENTS OR WHEN DIRECTED BY THE
ENGINEER (SEE 3010, 2.05 AND 3.01.D)
OD
KEY:
OD = OUTSIDE DIAMETER OF PIPE
OS = OUTSIDE SPAN OF PIPE
d = DEPTH OF BEDDING MATERIAL BELOW PIPE
OD/8 OR OS/8 OR 4" (WHICHEVER IS GREATER)
D = INSIDE DIAMETER OF PIPE
TW = TRENCH WIDTH AT TOP OF PIPE
MINIMUM = OD+18"
MAXIMUM = 1.25XOD+12" OR 54"
(WHICHEVER IS GREATER)
DIVISION
ENGINEERING SPECIFIC TRENCH BEDDING AND BACKFILL ZONES
RCP GRAVITY FLOW SEWERS
IN UNPAVED AREA
FIGURE 3010.201
SHEET 8 OF 8
LEGEND
CLASS I BEDDING MATERIAL
CLASS II BACKFILL MATERIAL
CLASS III / IVA / IVB SUITABLE
BACKFILL MATERIAL
OVER-EXCAVATION AND
FOUNDATION STONE
CLASS V BACKFILL MATERIAL
(E.G. TOPSOIL)
UNDISTURBED EARTH
BURY DEPTH
OD/2
OD/2
SPRINGLINE OF PIPE
KEY:
OD = OUTSIDE DIAMETER OF PIPE
OS = OUTSIDE SPAN OF PIPE
d = DEPTH OF BEDDING MATERIAL BELOW PIPE
OD/8 OR OS/8 OR 4" (WHICHEVER IS GREATER)
OD/6
d
FINAL TRENCH BACKFILL
NOTES:
1.REFER TO THE CONTRACT DOCUMENTS FOR SPECIFIC MATERIAL AND PLACEMENT REQUIREMENTS.
2.CONSOLIDATE AND MODERATELY COMPACT BY SLICING WITH A SHOVEL OR USING OTHER
APPROVED TECHNIQUES.
3.COMPACT TO AT LEAST 95% STANDARD PROCTOR DENSITY. OBTAIN REQUIRED COMPACTION WITHIN
A SOIL MOISTURE RANGE OF OPTIMUM MOISTURE TO 4% ABOVE OPTIMUM MOISTURE CONTENT.
4.PROTECT PIPE, ACCESSORIES, AND APPURTENANCES DURING PLACEMENT AND COMPACTION OF
BEDDING AND BACKFILL MATERIALS.
D = INSIDE DIAMETER OF PIPE
TW = TRENCH WIDTH AT TOP OF PIPE
MINIMUM = OD+18"
MAXIMUM = 1.25XOD+12" OR 54"
(WHICHEVER IS GREATER)
SECONDARY BACKFILL, SEE NOTE 3
PRIMARY BACKFILL, SEE NOTE 3
HAUNCH SUPPORT, SEE NOTE 2
PIPE BEDDING
OVER-EXCAVATION
COMPACT TO AT LEAST 95% STANDARD
PROCTOR DENSITY WITHIN RIGHT-OF-WAY
AND 90% STANDARD PROCTOR DENSITY
OUTSIDE THE RIGHT-OF-WAY; OBTAIN
REQUIRED COMPACTION WITHIN A SOIL
MOISTURE RANGE OF OPTIMUM MOISTURE
TO 4% ABOVE OPTIMUM MOISTURE
CONTENT
AND FOUNDATION STONE, REQUIRED ONLY
WHEN SPECIFIED IN THE CONTRACT
DOCUMENTS OR WHEN DIRECTED BY THE
ENGINEER (SEE 3010, 2.05 AND 3.01.D)
CONSOLIDATE AND MODERATELY
COMPACT BEDDING MATERIAL
TW
D
OD
Supplemental Specifications Division 3 – Trench and Trenchless Construction
City of Iowa City 3-11 January 2022
SECTION 3020 – TRENCHLESS CONSTRUCTION (BORING, JACKING, AND
TUNNELING)
1.03 SUBMITTALS
E. (ADD) Contractor shall provide post construction CCTV videos with inclinometer readings for
gravity pipes.
3.06 (REPLACE) UTILITY LOCATING SITE RESTORATION
Restore areas removed as a means to locate underground utilities according to Section 7040,
3.01.G and 3.01.H for paved areas and Section 9010 or 9020 for non-paved areas, unless
otherwise directed by the Engineer.
DIVISION 4 -
SEWERS AND DRAINS
Supplemental Specifications Division 4 – Sewers and Drains
City of Iowa City 4-2 January 2022
SECTION 4010 – SANITARY SEWERS
1.07 SPECIAL REQUIREMENTS
A. Prior to start of work, notify all affected parties 24 hours in advance as to the length of time
their service will be blocked.
B. Establish a Public Information and Notification Program for contacting each home or business
connected to the affected sanitary sewer, informing them of the work to be done and when the
sewer will be off-line. The following specific steps are part of the Public Information and
Notification Program.
1. Provide written notice to be delivered to each affected home or business describing work,
schedule, how the work affects them, and a local telephone number of the Contractor they
can call to discuss the project or their problems.
2. Personally contact each home or business on the day lateral verifications using closed
circuit video inspection are to be performed. The homeowner or business will be asked to
run water down their drain to verify each lateral. If the homeowner is unavailable, attempt
other arrangements (cleanouts) to drain water through the lateral to verify each connection.
3. Provide written notice and personally contact the home or business the day prior to
beginning work on the section of sewer to which they are connected.
4. Personally contact all homes or businesses that cannot be reconnected within the time
stated in the written notice.
5. Furnish and service portable toilets for use by the home or business occupants if so
required by any affected served business or homeowner.
1.08 MEASUREMENT AND PAYMENT
E. Sanitary Sewer Service Stub: (REPLACE) The portion of the sanitary sewer service, within
the public right-of-way, from the sewer main to a point ten feet beyond the right-of-way line or
the outer utility easement line, whichever is greater. This distance can be otherwise specified
in the contract documents. Comply with Figure 4010.201 – Sanitary Sewer Service Stub.
1. Measurement: Each type and size of pipe will be measured in linear feet along the
centerline of the pipe from the end of the pipe to the centerline of the sewer main.
2. Payment: Payment will be made at the unit price per linear foot for each type and size of
sanitary sewer service stub.
3. Includes: Unit price includes, but is not limited to, trench excavation; furnishing and
installing pipe; furnishing, placing, and compacting bedding and backfill material; tap;
fittings; testing; and inspection.
H. Removal of Sanitary Sewer:
3. Includes: (REPLACE) Unit price includes, but is not limited to, excavation; removal,
disposal, and capping of pipe (if specified); and furnishing, placing, and compacting backfill
material.
Supplemental Specifications Division 4 – Sewers and Drains
City of Iowa City 4-3 January 2022
2.01 SANITARY SEWER (GRAVITY MAINS)
A. Solid Wall Polyvinyl Chloride Pipe (PVC) 8 inch to 15 inch:
5. (ADD) Restrained Joint on Trenchless Construction: Pipe shall be joined using a non-
metallic spline-lock system. High-strength, flexible thermoplastic splines shall be inserted
into mating, precision-machined grooves in the pipe and bell to provide full 360-degree
restraint with evenly distributed loading. Integral bell joints shall incorporate an elastomeric
sealing gasket meeting the requirements of ASTM F 477. Joints shall be designed to meet
the leakage test requirements of ASTM D 3139.
a) Approved Products and Manufacturers: CertaFlo GreenLine SDR 21, CertainTeed
Corporation, Malvern, Pennsylvania; or approved equal.
b) PVC Restrained Joint on Trenchless Construction can be used for gravity flow pipes if
approved by the Engineer.
C. (DELETE) Corrugated Polyvinyl Chloride Pipe (PVC) 8 inch to 36 inch: and all subsections.
F. Reinforced Concrete Pipe (RCP) 18 inch to 144 inch:
1. General:
c. (DELETE) Tongue and groove joints.
d. (REPLACE) Rubber O-ring joint complying with ASTM C 443. Profile gasket flexible
joints are not allowed on sanitary sewers.
H. (DELETE) Vitrified Clay Pipe (VCP) 8 inch to 42 inch: and all subsections.
I. (DELETE) Double Walled Polypropylene Pipe 12 inch to 30 inch: and all subsections.
J. (DELETE) Triple Walled Polypropylene Pipe 30 inch to 36 inch: and all subsections.
2.02 SANITARY SEWER FORCE MAINS
B. (REPLACE) Polyvinyl Chloride Pipe (PVC): Comply with AWWA C900 with gray iron pipe
equivalent outside diameters.
1. Minimum Wall Thickness:
a. 4 inch through 24 inch sizes: DR 18.
b. Sizes over 24 inch: As specified in the contract documents.
2. Joint Type: Use push-on joint type, except as otherwise specified in the contract
documents or as authorized by the Engineer.
a. Push-on: According to AWWA C900.
b. Integral Restrained Joint: AWWA C900 pipe with restraining system manufactured
integrally into pipe end.
c. Mechanical Restrained Joint: Ductile iron mechanical device designed for joint
restraint of AWWA C900 pipe complying with the requirements of ASTM F 1674.
Supplemental Specifications Division 4 – Sewers and Drains
City of Iowa City 4-4 January 2022
d. Restrained Joint on Trenchless Construction: Pipe shall be joined using a non-
metallic spline-lock system. High-strength, flexible thermoplastic splines shall be
inserted into mating, precision-machined grooves in the pipe and bell to provide full
360-degree restraint with evenly distributed loading. Integral bell joints shall
incorporate an elastomeric sealing gasket meeting the requirements of ASTM F 477.
Joints shall be designed to meet the leakage test requirements of ASTM D 3139.
1) Approved Products and Manufacturers: CertaFlo GreenLine SDR 21,
CertainTeed Corporation, Malvern, Pennsylvania; or approved equal.
3. Markings on Pipe:
a. Name of manufacturer.
b. Size and class.
c. Spigot insertion depth gauge.
d. National Sanitation Foundation (NSF) seal.
2.04 SANITARY SEWER SERVICES
A. Connection to Main:
4. (DELETE) VCP Main: and all subsections.
3.02 GRAVITY SEWER INSTALLATION
B. Trenched:
3. (ADD) Monitor line and grade using installation laser level. Calibration of this equipment
should be verified before its use in accordance with the equipment manufacturer’s
recommendations.
3.04 GRAVITY MAIN PIPE JOINTING
C. Reinforced Concrete Pipe (RCP): (REPLACE)
1. Unlined pipe: Coat rubber gasket and joint with soap-based lubricant immediately prior to
closing joint.
2. Lined pipe: Follow manufacturer’s recommendations.
F. Connections between Dissimilar Pipes:
1. (REPLACE) Couplings shall be 1000 or 5000 Series Strong Back (RC) as manufactured
by Fernco or Engineer approved equal.
2. (DELETE) Where adapters or couplings are not available, the Engineer may authorize use
of a Type PC-2 concrete collar as shown in Figure 4020.211.
3.05 FORCE MAIN INSTALLATION
C. (ADD) Sub-surface Utility Warning Tape: All sanitary sewer force mains shall be identified
by a sub-surface utility warning tape placed at an elevation not less than six inches, nor more
Supplemental Specifications Division 4 – Sewers and Drains
City of Iowa City 4-5 January 2022
than twelve inches below the proposed finished grade. The utility warning tape shall be
manufactured by Terra Tape or Engineer approved equal.
3.06 SANITARY SEWER SERVICE STUBS
C. (REPLACE) Install service stub, within the public right-of-way, from the sewer main to a point
ten feet beyond the right-of-way line or the outer utility easement line, whichever is greater.
This distance can be otherwise specified in the contract documents. Comply with Figure
4010.201 – Sanitary Sewer Service Stub.
1. Install according to Section 4010, 3.02.
2. Install service stub with a slope between 2% and 5% for 4 inch pipes, and between 1% and
5% for pipes 6 inches and greater.
3. Terminate end of service stub 10 to 12 feet below finished ground elevation or as specified
in the contract documents.
4. If the depth of the sewer main causes the service to exceed a depth of 12 feet or a slope
of 5%, install a service riser.
5. For undeveloped properties, place watertight stopper, cap, or plug in end of sanitary sewer
service. Mark the end of the service line as required by the Jurisdiction or as specified in
the contract documents.
6. For reconnection of new service pipe with existing service pipe, comply with the
Jurisdiction’s plumbing code.
7. Multiple sanitary sewer service stubs shall not be constructed within the same trench.
8. Sanitary sewer service stubs must be separated from each other by six feet and separated
from the nearest by three feet from the nearest manhole or structure.
FIGURES
Figure 4010.201 – Sanitary Sewer Service Stub
(REPLACE) 10-foot dimension to Location Point with “ten feet beyond the right-of-way line or
the outer utility easement line, whichever is greater”
Supplemental Specifications Division 4 – Sewers and Drains
City of Iowa City 4-6 January 2022
SECTION 4020 – STORM SEWERS
1.07 SPECIAL REQUIREMENTS
A. Lift holes in sewer pipes are not allowed.
1.08 MEASUREMENT AND PAYMENT
D. Removal of Storm Sewer:
3. Includes: (REPLACE) Unit price includes, but is not limited to, excavation; removal,
disposal, and capping of pipe (if specified); and furnishing, placing, and compacting backfill
material.
F. Storm Sewer Abandonment, Plug:
3. Includes: Unit price includes, but is not limited to, trench excavation (if necessary), cutting
pipe (if required), furnishing and placing plug materials, and furnishing, placing, and
compacting backfill material.
G. Storm Sewer Abandonment, Fill and Plug:
3. Includes: Unit price includes but is not limited to, trench excavation (if necessary); cutting
pipe (if required); furnishing and placing pipe fill materials; furnishing and placing plug
materials; and furnishing, placing, and compacting bedding and backfill material.
2.01 STORM SEWERS
A. Reinforced Concrete Pipe (RCP):
3. (REPLACE) Use rubber, confined, O-ring or profile gasket complying with ASTM C 443.
4. (ADD) 36 inch and smaller: use bell and spigot joints.
5. (ADD) Larger than 36 inch: may have tongue and groove joints.
6. (ADD) No mastic joints are allowed.
B. Reinforced Concrete Arch Pipe (RCAP):
3. (REPLACE) Use tongue and groove joints with butyl rope and wrapped with engineering
fabric, unless a rubber O-ring or profile gasket complying with ASTM C 443 is specified
and available.
a) Engineering fabric shall be no less than 24 inches wide. Overlap engineering fabric
12 inches at the top of the pipe, on each side of the joint.
4. (ADD) No mastic joints are allowed.
C. Reinforced Concrete Elliptical Pipe (RCEP):
3. (REPLACE) Use rubber, confined, O-ring or profile gasket complying with ASTM C 443.
4. (ADD) 36 inch and smaller: use bell and spigot joints.
5. (ADD) Larger than 36 inch: may have tongue and groove joints.
Supplemental Specifications Division 4 – Sewers and Drains
City of Iowa City 4-7 January 2022
6. (ADD) No mastic joints are allowed.
D. Reinforced Concrete Low Head Pressure Pipe (RCPP):
2. (REPLACE) Use rubber, confined, O-ring or profile gasket complying with ASTM C 361.
3. (ADD) 36 inch and smaller: use bell and spigot joints.
4. (ADD) Larger than 36 inch: may have tongue and groove joints.
M. Bituminous Joint Primer: (REPLACE) Only with the approval of the Engineer. Material
intended for use in priming concrete joints. Comply with the requirements of ASTM D 41.
3.02 PIPE INSTALLATION
A. General:
3. (DELETE) Place pipe with lifting holes at the top of the pipe and fill lift hole with non-shrink
grout or manufactured plugs.
3.05 PIPE JOINTING
A. General:
3. (ADD) The Engineer must authorize use of pipe joint wrapping.
E. Connections between Dissimilar Pipes:
1. (ADD) Couplings shall be 1000 or 5000 Series Strong Back (RC) as manufactured by
Fernco or Engineer approved equal.
FIGURES
(REPLACE) Figure 4020.211 – Storm Sewer Pipe Connections
TYPE PC-2 CONCRETE COLLAR CONNECTION
TYPE PC-1 CONCRETE COLLAR CONNECTION
Wall of Precast Manhole
or Intake Structure
CONCRETE COLLAR FOR PIPES 12" AND SMALLER
CONCRETE COLLAR FOR PIPES GREATER THAN 12"
PIPE TO STRUCTURE CONNECTION
PIPE TO PIPE CONNECTION - ONLY FOR
PIPE JOINT WRAPPING
6"x6" - w2xw2
(8ga) Wire Mesh
6" min.
Pipe Joint Overlap fabric
12" at top of pipe.
12"12"
3"6" min.
12"
min.
12"
min.
Engineering
Fabric
4" min.
9" min.
4" min.
3
2 4
1
42
3
6"
min.
6"
min.
Trim pipe
and fill voids
with mortar.
1
2
3
4
1
Wall of Precast Manhole
or Intake Structure
6"x6" - w2xw2
(8ga.) Wire Mesh
(IF AUTHORIZED BY CITY ENGINEER)
(IF AUTHORIZED BY CITY ENGINEER)
REINFORCED CONCRETE ARCH PIPE (RCAP)
5
Lap ends of wire mesh a minimum of 6 inches.
Concrete collar is required when annular
space between the outside of the pipe and the
wall of the structure is 2 inches or greater.
Provide two #4 hoop bars in concrete collar.
Lap bars a minimum of 6 inches.
Trowel concrete flush with inside wall of
structure.
Waterstop per 6010, 2.08.B
5
5
5
DIVISION
ENGINEERING STORM SEWER PIPE
CONNECTIONS FIGURE 4020.211
Supplemental Specifications Division 4 – Sewers and Drains
City of Iowa City 4-9 January 2022
SECTION 4040 – SUBDRAINS AND FOOTING DRAIN COLLECTORS
1.08 MEASUREMENT AND PAYMENT
E. Storm Sewer Service Stub: (REPLACE) The storm sewer service stub is the portion of the
storm sewer service, within the public right-of-way, from the footing drain collector or storm
sewer to a point ten feet beyond the right-of-way line or the outer utility easement line,
whichever is greater. This distance can be otherwise specified in the contract documents.
1. Measurement: Each type and size of pipe will be measured in linear feet along centerline
of pipe from the centerline of storm sewer or footing drain collector to a point ten feet
beyond the right-of-way line or the outer utility easement line, whichever is greater.
2. Payment: Payment will be made at the unit price per linear foot for each type and size of
storm sewer service stub.
3. Includes: Unit price includes, but is not limited to, trench excavation, furnishing, placing,
and compacting bedding and backfill material, tap, fittings, and plugs.
2.01 FOOTING DRAIN COLLECTORS
(ADD) HDPE pipe, as listed in Section 4040, 2.01.C shall be used unless otherwise approved by
the Engineer.
2.02 TYPE 1 SUBDRAINS (LONGITUDINAL SUBDRAIN)
(ADD) HDPE pipe, as listed in Section 4040, 2.01.C shall be used unless otherwise approved by
the Engineer.
2.03 TYPE 2 SUBDRAINS (COMBINATION SUBDRAIN/FOOTING DRAIN COLLECTOR)
(ADD) HDPE pipe, as listed in Section 4040, 2.01.C shall be used unless otherwise approved by
the Engineer.
3.03 FOOTING DRAIN SERVICE STUBS
C. (REPLACE) Install footing drain service stub, within the public right-of-way, to a point ten feet
beyond the right-of-way line or the outer utility easement line, whichever is greater. This
distance can be otherwise specified in the contract documents.
1. For undeveloped properties, place a watertight stopper or plug in the end of the storm
sewer service.
2. For reconnection of existing service pipe to new sewer service pipe, use a manufactured
flexible connection.
SECTION 4050 – PIPE REHABILITATION
1.07 SPECIAL REQUIREMENTS
B. (REPLACE) The Contractor will pay for the cost of the water used for cleaning and installation
of cured-in-place pipe. The Contractor will let the Engineer know the means and methods for
providing water prior to commencement of construction. Refer to Section 1060, 1.08 – Bulk Water
Use, for approved means and methods.
Supplemental Specifications Division 4 – Sewers and Drains
City of Iowa City 4-10 January 2022
1.08 MEASUREMENT AND PAYMENT
H. Spot Repairs by Pipe Replacement:
1. Spot Repairs by Count:
c. Includes: Unit price includes, but is not limited to, trench excavation; dewatering;
bypass pumping; uncovering and removing existing pipe; furnishing and installing the
replacement pipe; pipe lining (if specified); furnishing, placing, and compacting bedding
and backfill material for replacement pipe; wyes and other fittings; pipe joints; pipe
connections; testing; and inspection.
2. Spot Repairs by Linear Foot:
c. Includes: Unit price includes, but is not limited to, trench excavation; dewatering;
bypass pumping; uncovering and removing existing pipe; furnishing and installing the
replacement pipe; pipe lining (if specified); furnishing, placing, and compacting bedding
and backfill material for replacement pipe; wyes and other fittings; pipe joints; pipe
connections; testing; and inspection.
2.01 CIPP MAIN LINING
F. (ADD) Use products manufactured with a flame bonded seam. Do not use products that require
tape on the seams.
2.07 SEWER MAIN PIPE (FOR SPOT REPAIRS)
A. (REPLACE) Comply with Sections 4010 and 4020.
3.07 SPOT REPAIRS BY PIPE REPLACEMENT
C.
1. (REPLACE) Use the materials as specified in the contract documents that comply with
Sections 4010 and 4020.
SECTION 4060 – CLEANING, INSPECTION, AND TESTING OF SEWERS
2.01 TESTING EQUIPMENT
B. Video Inspection:
1. Camera:
f. (ADD) Capable of providing inclinometer readings with slope information displayed.
3.03 SANITARY SEWER LEAKAGE TESTING
A. Sanitary Sewer Infiltration Testing:
1. (REPLACE) Use only where ground water is more than 2 feet above the top of pipe at the
highest point in section being tested. Testing shall not commence until ground water levels
have returned to normal levels.
DIVISION 5 -
WATER MAINS AND APPURTENANCES
Supplemental Specifications Division 5 – Water Mains and Appurtenances
City of Iowa City 5-2 January 2022
TABLE OF CONTENTS
(ADD) ACCEPTED PRODUCTS FOR WATER DISTRIBUTION MATERIALS
The document is attached to the end of this Division.
SECTION 5010 – PIPE AND FITTINGS
1.07 SPECIAL REQUIREMENTS
A. (ADD) PVC pipe shall only be used on water mains 12 inch diameter and less.
B. (ADD) Prestressed concrete cylinder pipe will not be permitted, unless approved by the
Engineer.
C. (ADD) Reuse of materials is not allowed, unless approved by the Engineer. The Jurisdiction
accepts no fault for any issues caused by, or related to, the reuse of any material.
D. (ADD) The City of Iowa City Water Division, Accepted Products for Water Distribution Materials,
should be followed for all water mains and appurtenances. This document is attached at the
end of this Division.
2.01 WATER MAIN
A. Polyvinyl Chloride (PVC) Pipe: Comply with AWWA C900 with gray iron pipe equivalent
outside diameters.
1. Minimum Wall Thickness:
a. (REPLACE) 4 inch through 12 inch sizes: DR 18
b (REPLACE) Sizes over 12 inches: As specified in the contract documents.
B. Ductile Iron Pipe (DIP):
1. Minimum Thickness Class:
c. (ADD) Restrained Joints: Special thickness Class 53 according to AWWA C151.
2.02 BOLTS FOR WATER MAIN AND FITTINGS
B. Other Bolts and Nuts:
2. (DELETE) Ductile Iron
3. (DELETE) Zinc, zinc chromate, or cadmium plated.
2.03 FITTINGS
A. For DIP and PVC Pipe: Comply with AWWA C110 (ductile iron or gray iron) or AWWA C153
(ductile iron).
Supplemental Specifications Division 5 – Water Mains and Appurtenances
City of Iowa City 5-3 January 2022
1. Joint Type:
a. (DELETE) For pipe sizes 16 inches and less, use mechanical joint complying with
AWWA C111.
b. (REPLACE) For all pipe sizes, use restrained mechanical joint system. Provide
follower gland using breakaway torque bolts to engage thrust restraint.
1) Minimum pressure rating same as connecting pipe. For fittings between dissimilar
pipes, the minimum pressuring rating is the lesser of the two pipes.
2) Suitable for buried service.
3) Joint restraint system to be field installable, field removable, and re-installable.
C. Pipe Coupling:
4. Bolts and Nuts: (REPLACE) High Strength, low alloy corrosion resistant steel or stainless
steel.
2.04 CONCRETE THRUST BLOCKS
C. (DELETE) Use for all pipe sizes 16 inches in diameter or smaller or when specified.
2.05 PIPELINE ACCESSORIES
B. Tracer System: (REPLACE) Comply with Figures 5010.102 to 5010.106
4. Splice Kit: (REPLACE) See Tracer Wire Connector under the Accepted Products for
Water Distribution Materials.
5. Tracer Wire Station: (REPLACE) See Tracer Wire Terminal Box under the Accepted
Products for Water Distribution Materials.
2.06 SPECIAL GASKETS
A. (REPLACE) For soils contaminated with gasoline, use nitrile gaskets.
B. (REPLACE) For soils contaminated with volatile organic compounds, contact the Engineer for
the required gaskets.
2.07 WATER SERVICE PIPE AND APPURTENANCES
A. Controlling Standards: (REPLACE) Jurisdictional policies and procedures, plumbing and fire
codes.
B. Materials (as allowed by Jurisdiction or specified in contract documents):
1. Copper Pipe:
c. (ADD) Required for services 2 inches and smaller in diameter from the corporation to
the curb box.
3. PVC Pipe: As specified in Section 5010, 2.01.
4. (DELETE) Brass Pipe: Red, seamless, according to ASTM B 43.
Supplemental Specifications Division 5 – Water Mains and Appurtenances
City of Iowa City 5-4 January 2022
3.01 PIPE INSTALLATION
A. General:
8. (REPLACE) For all fittings, install restrained joints within length(s) designed by an
engineer. When specified in the Contract Documents, install concrete thrust blocks and
restrained joints as designed.
3.05 TRACER SYSTEM INSTALLATION
E. (REPLACE) Install ground rods adjacent to connections to existing pipe in native, undisturbed
soil and at locations specified in the Contract Documents or as directed by the Engineer.
H. (ADD) A minimum of 18 inches of wire slack at every tracer wire terminal box lid shall be
installed.
I. (ADD) Every splice along the tracer wire shall have a minimum of 18 inches of wire slack added
to the line.
J. (ADD) No uninsulated wire shall be installed along any length of run or at splice points. All
exposed wire shall be mended as directed by the Engineer, and all splices shall include
dielectric grease.
K. (ADD) Ground rods should be placed 6 to 10 inches from the pipe and not make contact with
any part of the water system or any other utility.
L (ADD) Private water service line tracer wire system to be installed in accordance with Figures
5010.104 to 5010.106 and remain electrically disconnected from the public water main tracer
wire system.
3.06 CONFLICTS
D. Surface Water Crossings: (REPLACE) Comply with the Recommended Standards for Water
Works 2012 Edition.
3.09 WATER SERVICE STUB
B. (DELETE) Install 1 inch and small corporation valves tapped at 45 degrees above the horizontal
at a minimum distance of 18 inches from pipe bell or other corporation. Install 1 ½ inch and 2
inch corporation valves tapped horizontal a minimum distance of 24 inches from pipe bell or
other corporation.
C. (DELETE) Construct trench and place backfill material according to Section 3010.
Supplemental Specifications Division 5 – Water Mains and Appurtenances
City of Iowa City 5-5 January 2022
FIGURES
(REPLACE) Figure 5010.102 – Tracer Wire Installation with Existing Locate Wire
(ADD) Figure 5010.103 – Tracer Wire Installation without Existing Locate Wire
(ADD) Figure 5010.104 – Private Service Line Tracer Wire Installation Size 4” or Larger
(ADD) Figure 5010.105 – Private Service Line Tracer Wire Installation with Private Hydrant
Assembly
(ADD) Figure 5010.106 – Private Service Line Tracer Wire Installation with Domestic and Fire
Services
DIVISION
ENGINEERING TRACER WIRE INSTALLATION WITH EXISTING LOCATE WIRE FIGURE 5010.102
TRACER WIRE TERMINAL BOX AT GROUND LEVEL 1
1 EXTEND TRACER WIRE UP FIRE HYDRANT BARREL TO
INTERNAL TERMINALS OF TRACER WIRE TERMINAL BOX
AND THEN DOWN TO GROUND ROD.
2 CLAMP TRACER WIRE TO GROUND ROD AT SYSTEM
TERMINATION POINTS.
3 PLACE GROUND RODS 6" TO 10" AWAY FROM PIPE AND IN
CONTACT WITH NATIVE SOIL.
GROUND ROD 2
3
FIRE HYDRANT BARREL 1
TAPE WIRE AT MIDPOINT OF EACH PIPE LENGTH (TYP)
FIRE HYDRANT VALVE
FIRE HYDRANT TEE
SPLICE
DO NOT RUN WIRE
UP VALVE BOX
POSSIBLE SPLICE
GROUND ROD 2
SPLICE
EXISTING WATER MAIN
EXISTING LOCATE WIRE
NEW WATER MAIN
WIRE CONNECTING GROUND
ROD TO TERMINAL BOX IS A
SEPARATE WIRE FROM THE
WIRE TO THE HYDRANT RUN
REVISED JANUARY 2022
DIVISION
ENGINEERING TRACER WIRE INSTALLATION WITHOUT EXISTING LOCATE WIRE FIGURE 5010.103
TRACER WIRE TERMINAL BOX AT GROUND LEVEL 1
1 EXTEND TRACER WIRE UP FIRE HYDRANT BARREL TO
INTERNAL TERMINALS OF TRACER WIRE TERMINAL BOX
AND THEN DOWN TO GROUND ROD.
2 CLAMP TRACER WIRE TO GROUND ROD AT SYSTEM
TERMINATION POINTS.
3 PLACE GROUND RODS 6" TO 10" AWAY FROM PIPE AND IN
CONTACT WITH NATIVE SOIL.
GROUND ROD 2
3
FIRE HYDRANT BARREL 1
TAPE WIRE AT MIDPOINT OF EACH PIPE LENGTH (TYP)
FIRE HYDRANT VALVE
FIRE HYDRANT TEE
SPLICE
DO NOT RUN WIRE
UP VALVE BOX
POSSIBLE SPLICE
EXISTING WATER MAIN
WITHOUT EXISTING
LOCATE WIRE
NEW WATER MAIN
WIRE CONNECTING GROUND
ROD TO TERMINAL BOX IS A
SEPARATE WIRE FROM THE
WIRE TO THE HYDRANT RUN
REVISED JANUARY 2022
GROUND ROD 2
3
DIVISION
ENGINEERING PRIVATE SERVICE LINE TRACER WIRE INSTALLATION
SIZE 4" OR LARGER FIGURE 5010.104
TRACER WIRE TERMINAL
BOX AT GROUND LEVEL 1
4
1 EXTEND TRACER WIRE UP TO INTERNAL TERMINALS OF TRACER WIRE
TERMINAL BOX.
2 CLAMP TRACER WIRE TO GROUND ROD AT SYSTEM TERMINATION POINTS.
3 INSTALL PLACE GROUND ROD 6" TO 10" AWAY FROM PIPE AND IN CONTACT
WITH NATIVE SOIL.
4 TRACER WIRE TERMINAL BOX SET IN PAVEMENT SHALL BE PLACED IN A
DAYLIGHT BOX CONSISTING OF A VALVE BOX TOP WITH LID INDICATING
PRIVATE WATER SYSTEM.
GROUND ROD 2
3
TAPE WIRE AT MIDPOINT OF EACH PIPE LENGTH (TYP)
DO NOT RUN WIRE
UP VALVE BOX
EXISTING
WATER MAIN
REVISED JANUARY 2022
NEW WATER SERVICE PIPE
12" MIN
EXISTING GRADE AT BUILDING
FOUNDATION WALL
FOUND
A
T
IO
N
W
A
L
L
DIVISION
ENGINEERING PRIVATE SERVICE LINE TRACER WIRE INSTALLATION
WITH PRIVATE HYDRANT ASSEMBLY FIGURE 5010.105
TRACER WIRE TERMINAL
BOX AT GROUND LEVEL 1
1 EXTEND TRACER WIRE UP FIRE HYDRANT BARREL TO INTERNAL TERMINALS
OF TRACER WIRE TERMINAL BOX AND THEN DOWN TO GROUND ROD.
2 CLAMP TRACER WIRE TO GROUND ROAD AT SYSTEM TERMINATION POINTS.
3 PLACE GROUND RODS 6" TO 10" AWAY FROM PIPE AND IN CONTACT WITH
NATIVE SOIL.
GROUND ROD 2
3
FIRE HYDRANT BARREL 1
TAPE WIRE AT MIDPOINT OF
EACH PIPE LENGTH (TYP)
FIRE HYDRANT
TEE OR TAPPING
SLEAVE
SPLICE
DO NOT RUN WIRE
UP VALVE BOX
EXISTING
WATER MAIN
NEW WATER
SERVICE PIPE
WIRE CONNECTING
GROUND ROD TO
TERMINAL BOX IS A
SEPARATE WIRE FROM
THE WIRE TO THE
HYDRANT RUN
REVISED JANUARY 2022
GROUND ROD 2
3
FIRE HYDRANT
AUXILIARY VALVE
TAPPING
SLEAVE
EXISTING GRADE AT BUILDING
FOUNDATION WALL
GROUND ROD 2
3
FOUND
A
T
IO
N
W
A
L
L
DIVISION
ENGINEERING PRIVATE SERVICE LINE TRACER WIRE INSTALLATION
WITH DOMESTIC AND FIRE SERVICES FIGURE 5010.106
GROUND ROD 2
3
SPLICE
NEW WATER
SERVICE PIPE
REVISED JANUARY 2022
GROUND ROD 2
3
PRIVATE DOMESTIC
SERVICE VALVE
TAPPING
SLEAVE
GROUND ROD 2
3
1 EXTEND TRACER WIRE UP TO INTERNAL TERMINALS OF TRACER WIRE
TERMINAL BOX.
2 CLAMP TRACER WIRE TO GROUND ROD AT SYSTEM TERMINATION POINTS.
3 INSTALL PLACE GROUND ROD 6" TO 10" AWAY FROM PIPE AND IN CONTACT
WITH NATIVE SOIL.
4 TRACER WIRE TERMINAL BOX SET IN PAVEMENT SHALL BE PLACED IN A
DAYLIGHT BOX CONSISTING OF A VALVE BOX TOP WITH LID INDICATING
PRIVATE WATER SYSTEM.
GROUND ROD 2
3
TRACER WIRE TERMINAL
BOX AT GROUND LEVEL 1
4
12" MIN
EXISTING GRADE AT BUILDING
FOUNDATION WALL
TAPE WIRE AT MIDPOINT OF EACH PIPE LENGTH (TYP)
DO NOT RUN WIRE
UP VALVE BOX
EXISTING
WATER MAIN
ISOLATION VALVE
ON FIRE SERVICE
FOUND
A
T
ION
WA
L
L
Supplemental Specifications Division 5 – Water Mains and Appurtenances
City of Iowa City 5-11 January 2022
SECTION 5011 – FUSIBLE PVC AND HDPE PIPE
1.07 SPECIAL REQUIREMENTS
(ADD) Fusible PVC or HDPE to be used only as directed by the Engineer or as specified in the
contract documents.
2.01 WATER MAIN
A. Fusible PVC Pipe: Comply with AWWA C900 with ductile iron pipe equivalent outside
diameters.
1. Minimum Wall Thickness:
a. (REPLACE) 4 inch through 12 inch sizes: DR 18
b (REPLACE) Sizes over 12 inches: As specified in the contract documents.
SECTION 5020 – VALVES, FIRE HYDRANTS, AND APPURTENANCES
1.07 SPECIAL REQUIREMENTS
A. (ADD) The Jurisdiction maintains salvage rights to all fire hydrants, valve boxes, and valve box
lids designated as public.
B. (ADD) Samples of water main and its appurtenances may also be retained by the Jurisdiction
for testing purposes.
C. (ADD) Reuse of materials is not allowed, unless approved by the Engineer. The Jurisdiction
accepts no fault for any issues caused by, or related to, the reuse of any material.
D. (ADD) Flushing devices (blowoffs) shall only be used as approved by the Engineer.
E. (ADD) The City of Iowa City Water Division, Accepted Products for Water Distribution Materials,
should be followed for all water mains and appurtenances. This document is attached at the
end of this Division.
1.08 MEASUREMENT AND PAYMENT
C. Fire Hydrant Assembly:
3. Includes: (REPLACE) Unit price includes, but is not limited to, the fire hydrant, barrel
extensions sufficient to achieve proper bury depth of anchoring pipe and height of fire
hydrant above finished grade, and components to connect the fire hydrant to the water
main, including anchoring pipe, fittings (including tees on the main), thrust blocks, solid
concrete block, porous backfill material, and fire hydrant gate valve and appurtenances,
except tapping valve assembly if used.
D. (DELETE) Alternative Fire Hydrant Assembly:
1. Measurement: Each alternate fire hydrant assembly will be counted.
2. Payment: Payment will be at the unit price for each alternate fire hydrant assembly.
Supplemental Specifications Division 5 – Water Mains and Appurtenances
City of Iowa City 5-12 January 2022
3. Includes: Unit price includes, but is not limited to, the fire hydrant, barrel extensions
sufficient to achieve proper bury depth of anchoring pipe and height of fire hydrant above
finished grade, and components to connect the fire hydrant to the water main, including
anchoring pipes, 90 degree bend; fittings, thrust blocks, pea gravel or porous backfill
material, and fire hydrant gate valve and appurtenances, except tapping valve assembly if
used.
F. Valve Box Adjustment, Minor: (REPLACE) Measurement and payment for minor adjustment
of an existing valve box by centering, raising, or lowering the adjustable valve box is incidental.
J. Fire Hydrant Assembly Removal:
3. Includes: (REPLACE) The unit price includes, but is not limited to, excavation; removal of
the fire hydrant; hydrant valve; thrust block; delivery of the fire hydrant assembly to the
Jurisdiction; removal of the tee; restoration of the pipe; backfill; compaction; and surface
restoration to match the surrounding grade.
L. Valve Box Removal:
3. Includes: (REPLACE) The unit price includes, but is not limited to, excavation, removal of
each valve box and lid, delivery of the valve box to the Contracting Authority (if specified),
backfill, compaction, and surface restoration to match the surrounding area.
2.01 VALVES
B. Gate Valves:
1. Standards: (REPLACE) Comply with AWWA C509 (gray iron or ductile iron) and NSF 61.
C. Butterfly Valves:
1. Standards: (REPLACE) Comply with AWWA C504 class 150B (gray iron or ductile iron)
or class 250B and NSF 61.
D. Tapping Valve Assemblies:
1. Tapping Valve: (REPLACE) Gate valve complying with AWWA C509.
2.02 FIRE HYDRANT ASSEMBLY
C. Features:
4. Hose Nozzles: (REPLACE) Two, each 2 ½ inches in diameter, caps attached to hydrant
with chains.
5. Direction of Opening: (REPLACE) Clockwise, unless otherwise specified.
6. Items to be Specified: (REPLACE) The following items will be specified by the Jurisdiction
or in the Contract Documents.
a. Operating nut: 1 ½ inches, standard pentagon.
b. Pumper nozzle: One 4 ½ inch integral Storz connection with 1 ½-inch pentagon nut
and latch(es) and chains.
Supplemental Specifications Division 5 – Water Mains and Appurtenances
City of Iowa City 5-13 January 2022
c. Nozzle threads: National standard hose threads.
d. Main valve nominal opening size: 4 ½ inches on mains smaller than 12 inches in
diameter, 5 ¼ inches on main 12 inches and larger in diameter.
7. (ADD) Barrel Extensions: Solid barrel without threading; only one (single) extension
installed per hydrant.
D. Painting:
2. (REPLACE) Above grade exterior coating type will be Safety Red unless otherwise
specified by the Engineer.
2.03 APPURTENANCES
B. Valve Box:
3. Type:
a. (REPLACE) Slip (slide) type
b. (DELETE) In all other areas, use a screw extension type.
11. (ADD) Valve boxes shall be centered over the operating nut.
C. Valve Stem Extension: (REPLACE) Provide as necessary to raise 2 inch operating nut to
within 5 or 6 feet of the finished grade. Stem diameter shall be according to valve
manufacturer’s recommendations, but not less than 1 inch. It shall also be stainless steel.
D. (ADD) Stainless Steel Repair Clamps:
1. All stainless steel, single section, double section, or triple section, depending upon size of
main.
2. Shall have stainless steel bolts and nuts.
3.04 ADJUSTMENT OF EXISTING VALVE BOX OR FIRE HYDRANT
A. Minor Valve Box Adjustment: (REPLACE) For existing adjustable boxes that have sufficient
adjustment range to bring to finished grade, raise or lower valve box to finished grade. Valve
boxes should be centered over valve operating nut and run straight (not angled).
3.05 (ADD) TAPPED CONNECTIONS UNDER PRESSURE
A. Follow manufacturer’s installation instructions.
B. Tapping mains for new connections 1 inch to 12 inch in diameter shall be done by the
Jurisdiction. This includes connections made on public or private mains.
C. A new and site-specific Jurisdiction tapping application must be prepared for each tap
regardless of size, and submitted to the Jurisdiction for approval.
Supplemental Specifications Division 5 – Water Mains and Appurtenances
City of Iowa City 5-14 January 2022
3.06 (ADD) WATER MAIN OPERATIONS
A. All work which involves operating the active public water distribution system will require the
notice, consent, approval and assistance of the Jurisdiction.
B. An accurate and legible copy of the “as-built” drawings must be on file with the Jurisdiction prior
to using the water supply.
C. If requested by the Engineer, the contractor will work with the Jurisdiction to submit for approval
a plan for initial operations and a plan for final operations. The plan(s) shall include a drawing
and typed list of actions which show all significant steps necessary to connect to the existing
water distribution system or conduct the filling, flushing and testing operations. The purpose
of the plan(s) is to minimize the impact of service interruptions, and pressure and flow variations
in the water distribution system.
FIGURES
(REPLACE) Figure 5020.201 – Typical Hydrant and Valve Assembly
(ADD) Figure 5020.202 – Deadend Hydrant Detail
(ADD) Figure 5020.203 –Hydrant Detail for Future Water Main Extension
MAIN
REVISED 11/2016TRACER WIRE TERMINAL BOXPLACE BETWEEN HYDRANT AND HYDRANT VALVE.IN CONCRETE: PLACE 1' FROM HYDRANT.IN GRASS: TAPE TO HYDRANT BARREL WITH 2X4SCRAP OF WOOD INSTALLED BETWEEN BOX ANDBARREL TO ENSURE METALS DO NOT TOUCH.SOLID CONCRETE BLOCKHYDRANT4.5" FOR MAIN SMALLER THAN 12"5.25" FOR 12" AND LARGER MAINGROUND ROD (IN CONTACT WITH NATIVE SOIL)AS REQUIREDSOLID CONCRETE BLOCKTRACER WIRESWIVEL ORANCHOR TEETHRUST BLOCKPLUGTHRUST BLOCKGATE VALVEHOLDING SPOOL ORMEGA LUGDIVISIONENGINEERINGDEADEND HYDRANT DETAILFIGURE 5020.202
MAIN
TRACER WIRE TERMINAL BOXPLACE BETWEEN HYDRANT AND HYDRANT VALVE.IN CONCRETE: PLACE 1' FROM HYDRANT.IN GRASS: TAPE TO HYDRANT BARREL WITH 2X4SCRAP OF WOOD INSTALLED BETWEEN BOX ANDBARREL TO ENSURE METALS DO NOT TOUCH.SOLID CONCRETE BLOCKHYDRANT4.5" FOR MAIN SMALLER THAN 12"5.25" FOR 12" AND LARGER MAINGROUND ROD (IN CONTACT WITH NATIVE SOIL)AS REQUIREDSOLID CONCRETE BLOCKEXTEND TRACER WIRETO END OF PIPESWIVEL ORANCHOR TEETHRUST BLOCKGATE VALVESHOLDING SPOOL ORMEGA LUGHOLDING SPOOL ORMEGA LUGSOLID CONCRETE BLOCKEXTEND TRACER WIRETO END OF PIPEMINIMUM 20' OF PIPE AFTERVALVE FOR FUTUREPLUG OR CAPGROUND ROD (IN CONTACTWITH NATIVE SOIL)REVISED 1/2022DIVISIONENGINEERINGHYDRANT DETAIL FOR FUTUREWATER MAIN EXTENSIONFIGURE 5020.203
Supplemental Specifications Division 5 – Water Mains and Appurtenances
City of Iowa City 5-18 January 2022
SECTION 5030 – TESTING AND DISINFECTION
1.02 DESCRIPTION OF WORK
(REPLACE) Test and disinfect water mains, valves, fire hydrants, appurtenances and private water
services greater than 2 inches in diameter.
1.06 SCHEDULING AND CONFLICTS
C. (ADD) Testing shall not commence until all components are installed (including tracing system),
and the as-built and material list are submitted to the Jurisdiction. Testing (including tracing)
should be completed within two weeks.
1.07 SPECIAL REQUIREMENTS
A. (ADD) All testing and system operations will be performed by the Jurisdiction.
3.01 GENERAL
(REPLACE) Perform operations according to AWWA C651 in the sequence below. Successfully
complete each operation specified in subsections 3.02 through 3.11 below before continuing to the
next operation. The Jurisdiction will provide reasonable quantities of water for flushing and testing.
All main shall pass bacteriological sampling before pressuring testing. Testing segments shall be
no longer than 1,200 feet. All legs or laterals shall be tested as separate segments. Water main
must pass all testing before any main or service taps are made.
3.02 SEQUENCE OF TESTING AND DISINFECTION
A. Continuous-Feed or Slug Method (After Water Main Installation): The sequence of testing
and disinfection may be modified with approval of the Engineer.
1. Perform initial flush.
2. Perform disinfection.
3. Flush after disinfection.
4. Perform bacteriological sampling.
5. Perform pressure and leak testing.
B. Tablet Method (Concurrent with Water Main Installation): Use this method only if approved
by the Engineer. Modify the procedure for flushing, disinfection, and pressure and leak testing
as needed if tablet method is used.
3. (REPLACE) Perform bacteriological sampling.
4. (ADD) Perform pressure and leak testing.
3.04 PRESSURE AND LEAK TESTING
A. (DELETE) Remove debris from within the pipe. Clean and swab out pipe if required.
G. (REPLACE) The addition of makeup water is not allowed.
Supplemental Specifications Division 5 – Water Mains and Appurtenances
City of Iowa City 5-19 January 2022
H. (DELETE) Accurately measure the amount of water required to repressurize the system to the
test pressure.
I. (DELETE) Maximum allowable leakage rate according to AWWA C600:
L =(𝑆)(𝐷)(𝑃)0.5
148,000
Where:
L = allowable leakage, in gallons per hour
S = length of pipe tested, in feet
D = nominal pipe diameter, in inches
P = average test pressure, in pounds per square inch
The following table assumes an average test pressure (P) of 150 psi and 1,000 feet of test
section.
Table 5030.03: Maximum Allowable Leakage Rate
Pipe Diameter
(inches)
Allowable Leakage Rate
(gallons/hour/1,000 feet of pipe)
4 0.33
6 0.50
8 0.66
10 0.83
12 0.99
14 1.16
16 1.32
18 1.49
20 1.66
24 1.99
30 2.48
36 2.98
J. (DELETE) If the average measured leakage per hour exceeds the maximum allowable leakage
rate, repair and retest the water main.
3.05 DISINFECTION
B. Procedure:
5. (ADD) After 24 hours, a detectable free chlorine residual of:
a. greater than or equal to 0.2 mg/L for the tablet method or
b. greater than or equal to 10 mg/L for the continuous feed method shall be found at each
sample point.
3.07 BACTERIA SAMPLING
(REPLACE) Test water mains according to AWWA C651. Repeated failures to produce satisfactory
bacteriological results, or if other water quality is affected, will require corrective action up to and
including repeating the disinfection procedure or physically cleaning the main as approved by the
Engineer.
Supplemental Specifications Division 5 – Water Mains and Appurtenances
City of Iowa City 5-20 January 2022
3.08 (DELETE) RE-DISINFECTION
If the initial disinfection fails to produce satisfactory bacteriological samples, flush the main again
and reinitiate the sampling process. If check samples show the presence of coliform organisms, re-
chlorinate the main prior to flushing and sampling until satisfactory results are obtained.
3.09 PUTTING WATER MAIN IN SERVICE
(REPLACE) Put the completed water system in service only after both sets of bacterial samples
have passed, pressure test has passed, final system trace has passed, and obtaining permission
from the Jurisdiction.
3.10 (ADD) SYSTEM TRACE
All tracer wire terminal boxes shall be to grade, located appropriate distance from hydrant or valve,
and with tracer wire correctly attached. The Jurisdiction shall complete a trace to the new pipe(s),
including connections to the existing main. Any tracing deficiencies noted by the Jurisdiction shall
be corrected and retraced until the entire system traces correctly.
3.11 (ADD) SYSTEM CHECK
A. Valve Operations: All valves shall be located and tested to verify operation. Remove the valve
box lid, insert the valve key and open and close each valve.
B. Hydrant Operations:
1. After the hydrant has been installed and the main and hydrant have been pressure tested,
each hydrant shall be flushed and checked for proper operation.
2. After hydrant has been flushed, close it and check for drainage. This is done by placing a
hand over the nozzle opening and checking for a vacuum. Then check the hose thread for
proper fit.
3. Replace nozzle cap, then open hydrant again and inspect all joints for leaks.
City of Iowa City Water Division January 2022
Accepted Products for Water Distribution Materials Page 1
City of Iowa City Water Division
Accepted Products for Water Distribution Materials
(Revised January 2022)
WATER PIPE: (Ductile) ANSI/AWWA – A21.51/C151
American, McWane, U.S. Pipe/Griffin
WATER PIPE: (PVC) AWWA - C900 Pressure Class 150, DR 18
JM Eagle Blue Brute and Eagle Loc; CertainTeed Certa-Lok C900/RJ or C900/RJIB for directionally
bored or restrained joint piping
RESTRAINED JOINT PIPE GASKET: ANSI/AWWA C111/A21.11
American Fast-Grip, Amarillo Fast-Grip; McWane Sure Stop 350; SRP Barracuda; U.S. Pipe Field Lok
350
MECHANICAL JOINT RESTRAINT DEVICE: With NSS Cor-Blue Nuts & Bolts
EBAA 1100 and 2000 PV; Tyler Union TUFGrip 1000, 1000S, 1500, 2000, and 2000S
FITTING: ANSI/AWWA A21.10/C110 or C153, 350 psi
Romac Alpha (XL) End Cap, Sigma, Tyler Union, U.S. Pipe
TAPPING SLEEVE: (Full Body Ductile Iron) Stainless Steel and/or NSS Cor-Blue Nuts & Bolts
American Flow Control-Series 2800, Kennedy, Mueller-H615, Tyler Union
TAPPING SLEEVE: (Stainless Steel with 304* Stainless Steel Flange)
Ford FAST, JCM-432, Mueller H304, Romac SST, Smith-Blair 665, TPS Triple Tap Series TS
VALVE: (Resilient Seated Gate Valves) ANSI/AWWA C509, Open Counterclockwise
AVK Series 45, Clow 2639 and 2640 F-6100, Kennedy 8571 SS, Mueller A-2362-20
VALVE: (Butterfly) ANSI/AWWA C504, Class 150B or Class 250B, Open Counterclockwise
Clow, DeZurik, GAV 800 Series, Kennedy, M & H, Mueller, Pratt Groundhog, Val-Matic
VALVE: (Tapping) ANSI/AWWA C509, Open Counterclockwise
Clow 2639 and 2640 F-6114, Kennedy 8950 SS, Mueller T-2362-16
VALVE BOX: Slip Type, Heavy Duty
Sigma VB467-35 Top Section with Top Flange, Star Pipe VB-0007; Tyler Union Series 7126, Range
39”-60”
VALVE BOX CENTERING RING:
Adaptor, Inc Valve Box Adaptor II or equivalent
FIRE HYDRANT: AWWA C502, Open Clockwise, 4.5-inch main valve for pipes < 12-inch or
5.25-inch main valve for pipes >= 12-inch, and pumper nozzle integral Storz fitting with 1.5-inch
pentagon nut, latches, and chains
American Darling Mark 73-5, American Darling B-84-B-5, Clow F-2545 Medallion with all stainless-
steel shaft, Mueller Super Centurion 250
City of Iowa City Water Division January 2022
Accepted Products for Water Distribution Materials Page 2
STAINLESS STEEL REPAIR CLAMP: AWWA C230, With Stainless Steel Nuts & Bolts
AY McDonald 425/435 Series Teck, Romac SS1, Smith-Blair 261
SLEEVE TYPE COUPLING: AWWA C219, With Stainless Steel Nuts & Bolts
Hymax 2 Wide Range Coupling, Romac Style 501, Romac Alpha (XL) Wide Range Restraint Coupling,
Romac Macro HP Two-Bolt Coupling, Smith-Blair Top Bolt 421, Smith-Blair 441
TRACER WIRE TERMINAL BOX:
Copperhead SnakePit LD14BTP, CD14BTP, RB14BTP
TRACER WIRE CONNECTOR:
Copperhead Industries Snake Bite Locking Connector LSC1230B, Copperhead Industries Direct Bury
Single Connector, Twister DB Plus Wire Connector Model 60
TRACER WIRE: #12 AWG, Blue in Color
Copperhead, Kris Tech
FREEZELESS YARD HYDRANT:
Woodford Mfg Iowa Model Y34 and YI
SERVICE SADDLE: ANSI/AWWA C800 NL (no lead)
AY McDonald 3845, Ford 202BS, Smith-Blair 325
CORPORATION VALVE: ANSI/AWWA C800, Compression Ball Type
AY McDonald 74701BQ, Mueller B-25008N
BALL CURB VALVE: ANSI/AWWA C800, Compression Connection for CTS OD Tubing
AY McDonald 76100Q, Mueller B25209N
CURB BOX: ANSI/AWWA C800, Arch Pattern, 5-foot Length (Telescope 1-foot), Slide Style,
with 42” Stainless Steel Rod & Cotter Pin
AY McDonald 5601 and 5603 with 5660SS
CURB BOX LID: “W” or “Water” Label on Lid
Cement Applications: AY McDonald 5607L
All Other Applications: AY McDonald 5601L
STRAIGHT 3-PART UNION: ANSI/AWWA C800
AY McDonald 74758Q, Mueller H-15403N, Cambridge Coupling
POLYETHYLENE WRAP: AWWA C105, 8 mil
V-Bio Enhanced, approved equivalent
DIVISION 6 -
STRUCTURES FOR SANITARY AND
STORM SEWERS
Supplemental Specifications Division 6 – Structures for Sanitary and Storm Sewer
City of Iowa City 6-2 January 2022
SECTION 6010 – STRUCTURES FOR SANITARY AND STORM SEWERS
1.07 SPECIAL REQUIREMENTS
C. (ADD) Lift holes in sewer pipes are not allowed.
D. (ADD) Casting shall be placed above the outlet side of intakes.
1.08 MEASUREMENT AND PAYMENT
A. Manhole:
3. Includes: (REPLACE) Unit price includes, but is not limited to, excavation, furnishing and
installing pipe; lining (if specified); furnishing, placing, and compacting bedding and backfill
material, base; structural concrete; reinforcing steel; precast units (if used); concrete fillets;
pipe connections; infiltration barriers (required for both sanitary and storm sewer
manholes); castings; and adjustment rings.
B. Intake:
3. Includes: (REPLACE) Unit price includes, but is not limited to, excavation; furnishing and
installing pipe; furnishing, placing, and compacting bedding and backfill material; base;
structural concrete; reinforcing steel; precast units (if used); concrete fillets; pipe
connections; infiltration barriers; castings; and adjustment rings.
F. Manhole or Intake Adjustment Major:
3. Includes: (REPLACE) Unit price includes, but is not limited to, removal of existing casting,
adjustment rings, top sections and risers; excavation; concrete and reinforcing steel or
precast sections; adjustment or replacement of intake throat; furnishing and installing new
casting; installing new infiltration barrier (required for both sanitary and storm sewer
manholes); furnishing and placing backfill, and compaction.
G. Connection to Existing Manhole or Intake:
3. Includes: (REPLACE) Unit price includes, but is not limited to, coring or cutting into the
existing manhole or intake, pipe connections, grout, and waterstop.
H. Remove Manhole or Intake:
3. Includes: (REPLACE) Unit price includes, but is not limited to, excavation; removal of
casting, concrete, intake throat, and reinforcement; disposal; capping or plugging pipes;
filling remaining structure with flowable mortar; and furnishing, placing, and compacting
backfill over structure to finished grade. The structure needs to be removed completely
unless otherwise approved by the Engineer.
2.03 CAST-IN-PLACE
C. (ADD) All construction joints are to be water tight by use of water stop or other construction
methods.
Supplemental Specifications Division 6 – Structures for Sanitary and Storm Sewer
City of Iowa City 6-3 January 2022
2.05 PRECAST RISER JOINTS
B. Joint Sealant:
2. Storm Sewers:
b. (DELETE) Engineering Fabric Wrap: If specified in the contract documents, supply
engineering fabric wrap complying with Iowa DOT Article 4196.01, B.
2.08 PIPE CONNECTIONS (REPLACE)
A. Sanitary Sewer Manholes:
1. Flexible, Watertight Seal: Pipe penetrations into structures shall be a flexible watertight
seal. Allowable premanufactured seals include Link-Seal, A-Lok, PSX-Direct Drive boots
or engineer approved equal.
B. Storm Sewer Manholes and Intakes: All pipe connections used on sanitary sewers may also
be used for storm sewers.
1. Waterstop: Provide elastomeric gasket that surrounds pipe and attaches with stainless
steel bands and is designed to stop the movement of water along the interface between a
pipe and a surrounding concrete collar. The concrete collar shall comply with Section
6010, 2.03.
2.09 MANHOLE OR INTAKE ADJUSTMENT RINGS (GRADE RINGS)
A. (REPLACE) Use one of the following materials for grade adjustments of manhole or intake
frame and cover assemblies:
1. Reinforced Concrete Adjustment Rings: Comply with ASTM C 478. Provide rings free from
cracks, voids or other defects.
2. High Density Polyethylene Adjustment Rings: Comply with ASTM D 1248 for recycled
plastic.
a. Test and certify material properties by the methods in the following table.
Table 6010.02: Test Methods
Property Test Method Acceptable Value
Melt Flow Index ASTM D 1238 0.30 to 30 g/10 min
Density ASTM D 792 0.94 to 0.98 g/cm3
Tensile Strength ASTM D 638 2,000 to 5,000 lb/in2
b. Do not use polyethylene grade adjustment rings when they are exposed to HMA
pavement or heat shrink infiltration barriers, unless approved by the Engineer.
c. When used in a single configuration, provide tapered adjustment ring with thickness
that varies from 1/2 inch to 3 inches.
d. Install adjustment rings on clean, flat surfaces according to the manufacturer's
recommendations with the proper butyl rubber sealant/adhesive. Comply with ASTM
D 36 with minimum 350°F softening point for butyl rubber sealant.
Supplemental Specifications Division 6 – Structures for Sanitary and Storm Sewer
City of Iowa City 6-4 January 2022
3. Expanded Polypropylene Adjustment Rings: Comply with ASTM D 4819 for expanded
polypropylene when tested according to ASTM D 2375.
a. Use adhesive meeting ASTM C 920, Type S, Grade N5, Class 25.
b. Provide finish rings with grooves on the lower surface and flat upper surface.
2.10 CASTINGS (RING, COVER, GRATE, AND EXTENSIONS)
D. Casting Types:
1. Manholes: (REPLACE) The following table lists the manhole casting types.
Table 6010.03: Manhole Casting Types
Figure
Number
Casting
Type
Number
of Pieces
Ring/
Cover
Bolted
Frame
Bolted
Cover
(Floodable)
Gasket Sanitary Sewer 6010.601 SW-601 A 2 Fixed2,3 Yes No Yes1
6010.601 SW-601 C 2 Fixed2,3 Yes Yes Yes1 Storm Sewer 6010.602 SW-602 E 2 Fixed2,3 Yes No Yes1
6010.602 SW-602 G 2 Fixed2,3 No No Yes1
1 Machined bearing surfaces required.
2 Ring and Cover may be bolted as specified in the contract documents or as otherwise approved
by the engineer.
3 Cover shall have the Iowa City standard logo and a minimum of one-concealed pick hole. Refer
to Figure 6010.601 and Figure 6010.602 for details.
2. Intakes:
b. (REPLACE) Covers shall have the Iowa City Standard logo. Cover will include
environmental message, “Storm Sewer Drains to Stream” (see Figure 6010.602).
2.11 ADDITIONAL MATERIALS FOR SANITARY AND STORM SEWER MANHOLES
A. Infiltration Barrier:
1. External Chimney Seal:
b. Compression Bands:
3) (REPLACE) For standard two-piece castings, shape top band to lock sleeve to
manhole frame’s base flange.
2. Internal Chimney Seal: (REPLACE) allowed only in slip form paving (see Section 7010
for details on slip form equipment and operations)
Supplemental Specifications Division 6 – Structures for Sanitary and Storm Sewer
City of Iowa City 6-5 January 2022
a. Rubber Sleeve Extension:
1) Double pleated, minimum thickness 1/8 inch thick, according to ASTM C 923.
2) Minimum allowable vertical expansion of at least 2 inches.
3) Integrally formed expansion band recess top and bottom with multiple sealing fins.
b. Expansion Bands:
1) One-piece band assembly to compress sleeve or extension against manhole and
casting surfaces to make a watertight seal.
2) 16 gauge ASTM C 923, Type 304 stainless steel, minimum 1 inch width, minimum
adjustment range of 2 inches more than the manhole inside diameter.
3) Positive stainless steel locking mechanism permanently securing the band in its
expanded position after tightening.
4. (DELETE) Heat Shrink Sleeve: and all subsections.
B. Riser Section Coating:
1. Exterior: (REPLACE) When exterior waterproof coating is specified and approved by the
Engineer, provide bituminous or coal tar coating.
C. (ADD) Liner (For Sanitary Sewer Manholes Only):
1. HDPE or PVC lining can be used if approved by the Engineer. See Section 4010, 2.01.F.2
3.01 GENERAL REQUIREMENTS FOR INSTALLATION OF MANHOLES AND INTAKES
E. Pipes:
1. Cast-in-place Structures:
a. Storm: (REPLACE) Form or core circular opening and install flexible, watertight gasket
or waterstop according to Section 6010, 2.08.
2. Precast Storm Sewer Manholes or Intakes: (REPLACE) Connect to structure with
watertight gasket or waterstop according to section 6010, 2.08.
F. Joint Sealant:
1. Sanitary Sewer Manholes:
b. (REPLACE) Apply butyl sealant wrap to exterior of all sanitary sewer manhole joints.
2. Storm Sewer Manhole and Intakes:
b. (DELETE) If indicated in the contract documents, apply engineering fabric wrap to
joints.
I. Adjusting Ring(s):
2. (REPLACE) Bed each expanded polypropylene ring with manufacturer’s approved product
and according to manufacturer’s recommended installation procedure.
5. (ADD) For PCC adjustment rings, shim material other than PCC is not allowed.
Supplemental Specifications Division 6 – Structures for Sanitary and Storm Sewer
City of Iowa City 6-6 January 2022
J. Casting:
2. (ADD) In non-paved areas, the top of the rim on the casting is to be 0.2 feet above the
finish grade.
K. Infiltration Barrier: (REPLACE) Install on sanitary and storm sewer manholes. An infiltration
barrier is not required for HDPE or expanded polypropylene adjustment rings when installed
per the manufacturer’s recommendations.
1. Internal or External Chimney Seal:
a. Do not use external chimney seal if seal will be permanently exposed to sunlight.
b. Extend seal 3 inches below the lowest adjustment ring.
c. Extend seal to 2 inches above the flange of the casting for a standard two-piece
casting.
d. Use multiple seals, if necessary.
e. Install compression bands (external chimney seal) or expansion bands (internal
chimney seal) to lock the rubber sleeve or extension into place and to provide a positive
watertight seal. Once tightened, lock the bands into place. Use only manufacturer
recommended installation tools and sealants.
2. Molded Shield:
a. Clean surface of structure cone section.
b. Apply sealant to the top surface of the cone section. Use sufficient sealant to
accommodate flaws in the surface of the cone section.
c. Cut molded shield to height by adding the dimensions of the adjustment rings and
casting height. Be sure not to interfere with seating of the lid into the casting frame.
d. Seat the molded shield against the sealant on the cone section.
e. Add adjustment rings and casting to meet final grade.
M. (ADD) Intake Throat Expansion Joints:
1. Expansion joints to be sealed according to 7010, 3.02.L.3.
2. All intake expansion joints are to be sealed for the entirety of the joint to the back of curb.
3.03 ADDITIONAL REQUIREMENTS FOR PRECAST CONCRETE STRUCTURES (CONTINUED)
E. (DELETE) Lift Holes: Install rubber plug in lift holes. Cover plug and hole with non-shrink grout.
3.04 ADJUSTMENT OF EXISTING MANHOLE OR INTAKE
B. Minor Adjustment (Adding or Removing Adjustment Rings):
4. (REPLACE) Replace infiltration barrier for sanitary and storm sewer manhole using only
new materials.
C. Major Adjustment (Adding, Removing, or Modifying Riser or Cone Section):
Supplemental Specifications Division 6 – Structures for Sanitary and Storm Sewer
City of Iowa City 6-7 January 2022
5. (REPLACE) Replace infiltration barrier for sanitary and storm sewer manhole using only
new materials.
3.05 CONNECTION TO EXISTING MANHOLE OR INTAKE
B. Concrete Collar:
3. (ADD) Concrete collars must be approved by the Engineer.
C. Sanitary Sewer:
2. Cored Opening: (REPLACE)
a. Install premanufactured watertight seal and new pipe into the cored opening within the
existing manhole in accordance with the manufacturer’s recommendations.
3. (DELETE) Cut and Chipped Opening (knock-out): and all subsections.
D. Storm Sewer:
1. Cut and Chipped Opening:
a. (REPLACE) Only as approved by the Engineer.
f. (ADD) Install waterstop around new pipe centered within structure wall.
g. (ADD) Fill opening between structure and pipe with non-shrink grout.
h. (ADD) Construct concrete collar around pipe and exterior manhole opening.
2. Cored Opening: (REPLACE)
a. Use for all pipe sizes, unless approved by the Engineer.
b. Core new opening in existing manhole or intake to accept new pipe and watertight seal
or waterstop. Remove concrete and reinforcing steel.
c. If utilizing waterstop, install around new pipe centered within structure wall. Fill opening
between structure and pipe with non-shrink grout. Construct concrete collar around
pipe and exterior manhole opening.
d. If utilizing a premanufactured watertight seal, install in accordance with manufacturer’s
recommendations.
e. Cored openings shall be perpendicular to manhole or intake walls, unless approved by
the Engineer.
3. Fill Opening: (REPLACE) Fill opening between manhole or intake wall and outside of pipe
by constructing a concrete collar around the pipe according to Section 6010, 3.05, B.
3.06 DROP CONNECTION TO SANITARY SEWER MANHOLE
A. Internal:
10. (ADD) Internal drop connections should be used for all drop connections, unless approved
by the Engineer.
B. External:
Supplemental Specifications Division 6 – Structures for Sanitary and Storm Sewer
City of Iowa City 6-8 January 2022
6. (ADD) External drop connections must be approved by the Engineer.
FIGURES
Sanitary Sewer Manhole Figures
Figure 6010.301 – Circular Sanitary Sewer Manhole
(ADD) Infiltration barrier shown is for illustration purposes only. Approved products include:
external chimney seal or molded shield.
Figure 6010.302 – Rectangular Sanitary Sewer Manhole
(ADD) Infiltration barrier shown is for illustration purposes only. Approved products include:
external chimney seal or molded shield.
Figure 6010.303 – Sanitary Sewer Manhole Over Existing Sewer
(ADD) Infiltration barrier shown is for illustration purposes only. Approved products include:
external chimney seal or molded shield.
Figure 6010.304 – Rectangular Base/Circular Top Sanitary Sewer Manhole
(ADD) Infiltration barrier shown is for illustration purposes only. Approved products include:
external chimney seal or molded shield.
Figure 6010.305 – Tee Section Sanitary Sewer Manhole
(ADD) Infiltration barrier shown is for illustration purposes only. Approved products include:
external chimney seal or molded shield.
Figure 6010.306 – Chimney Seals for Sanitary Sewer Manholes
(DELETE) Internal chimney seal detail for 2-piece casting.
(DELETE) Chimney seal details for 3-piece castings.
(REPLACE) Figure 6010.308 – Internal Drop Connection for Sanitary Sewer Manhole
Storm Sewer Manhole Figures
Figure 6010.401 – Circular Storm Sewer Manhole
(ADD) Infiltration barrier shown is for illustration purposes only. Approved products include:
external chimney seal or molded shield.
Figure 6010.402 – Rectangular Storm Sewer Manhole
(ADD) Infiltration barrier shown is for illustration purposes only. Approved products include:
external chimney seal or molded shield.
Figure 6010.403 – Deep Well Rectangular Storm Sewer Manhole
(ADD) Infiltration barrier shown is for illustration purposes only. Approved products include:
external chimney seal or molded shield.
Figure 6010.404 – Rectangular Base/Circular Top Storm Sewer Manhole
Supplemental Specifications Division 6 – Structures for Sanitary and Storm Sewer
City of Iowa City 6-9 January 2022
(ADD) Infiltration barrier shown is for illustration purposes only. Approved products include:
external chimney seal or molded shield.
Figure 6010.405 – Tee Section Storm Sewer Manhole
(ADD) Infiltration barrier shown is for illustration purposes only. Approved products include:
external chimney seal or molded shield.
Figure 6010.507 – Single Open-Throat Curb Intake, Small Box
(ADD) Manhole opening must be over the discharge side of the intake structure.
(ADD) All intake expansion joints are to be sealed for the entirety of the joint to the back of
curb.
Figure 6010.508 – Single Open-Throat Curb Intake, Large Box
(ADD) Manhole opening must be over the discharge side of the intake structure.
(ADD) All intake expansion joints are to be sealed for the entirety of the joint to the back of
curb.
Figure 6010.509 – Double Open-Throat Curb Intake, Small Box
(ADD) Manhole opening must be over the discharge side of the intake structure.
(ADD) All intake expansion joints are to be sealed for the entirety of the joint to the back of
curb.
Figure 6010.510 – Double Open-Throat Curb Intake, Large Box
(ADD) Manhole opening must be over the discharge side of the intake structure.
(ADD) All intake expansion joints are to be sealed for the entirety of the joint to the back of
curb.
Figure 6010.541 – Open-Throat Curb Intake under Pavement
(ADD) All intake expansion joints are to be sealed for the entirety of the joint to the back of
curb.
Figure 6010.542 – Extension Unit for Open-Throat Curb Intake under Pavement
(ADD) All intake expansion joints are to be sealed for the entirety of the joint to the back of
curb.
(DELETE) Remove all transverse ‘B” Joints immediately in front of throat and adjacent to the
manhole cover panel.
Supplemental Specifications Division 6 – Structures for Sanitary and Storm Sewer
City of Iowa City 6-10 January 2022
Figure 6010.545 – Single Open-Throat Curb Intake with Extended Opening
(ADD) Manhole opening must be over the discharge side of the intake structure.
(ADD) All intake expansion joints are to be sealed for the entirety of the joint to the back of
curb.
Castings Figures
(REPLACE) Figure 6010.601 – Castings for Sanitary Sewer Manholes
(REPLACE) Figure 6010.602 – Castings for Storm Sewer Manholes
PLAN
TYPICAL SECTION
TWO-PIECE FIXED CASTING WITH BOLT-DOWN COVER 2
1 ANCHOR THE LOWER FRAME OF ALL
THREE-PIECE CASTINGS TO THE MANHOLE
STRUCTURE. WHEN SPECIFIED IN THE
CONTRACT DOCUMENTS, ANCHOR THE FRAME
OF TWO-PIECE CASTINGS TO THE MANHOLE
STRUCTURE. IF CASTING FRAME DOES NOT
INCLUDE ANCHOR HOLES OR SLOTS, DRILL FOUR
7/8 INCH DIAMETER HOLES, EQUALLY SPACED
AROUND THE FRAME.
2 IF SPECIFIED, FURNISH BOLT DOWN FRAME AND
COVER WITH FOUR 1/2 INCH MINIMUM DIAMETER
STAINLESS STEEL, HEX NUT, RECESSED CAP
SCREWS. SECURE COVER WITH SCREWS,
WASHERS, AND RUBBER GASKET SEALS.
TYPE C
FRAME NOTES:
SIZE, SPACING, AND NUMBER OF LUGS AND FLANGES
MAY VARY.
COVER NOTES:
ROUGHNESS PATTERN AND TEXT STYLES MAY VARY.
MINIMUM ONE CONCEALED PICKHOLE.
ENGINEERING DIVISION
CASTINGS FOR
SANITARY SEWER MANHOLES FIGURE 6010.601
TWO-PIECE FIXED CASTING
TYPE A
FLANGE (TYP)ANCHOR BOLT HOLE 1
BOLT-DOWN
COVER (TYPE C) 2
26" MIN
24" MIN
35 7/8" MIN
6 15/16"
1 1/2"
GASKET SEAL
DIVISION
ENGINEERING Castings for
Storm Sewer Manholes Figure 6010.602
Supplemental Specifications Division 6 – Structures for Sanitary and Storm Sewer
City of Iowa City 6-14 January 2022
SECTION 6020 – REHABILITATION OF EXISTING MANHOLES
1.08 MEASUREMENT AND PAYMENT
A. Infiltration Barriers:
2. (DELETE) Molded Shield: and all subsections.
3. (DELETE) Urethane Chimney Seal: and all subsections.
2.01 INFILTRATION BARRIER
B. (DELETE) Molded Shield: Comply with Section 6010, 2.11 for molded shields.
C. (DELETE) Heat Shrink Sleeve: Comply with Section 6010, 2.11 for heat shrink sleeves.
D. (DELETE) Urethane Chimney Seal: and all subsections.
3.01 INFILTRATION BARRIER
B. (DELETE) Molded Shield: Comply with Section 6010, 3.01.
C. (DELETE) Urethane Chimney Seal: and all subsections.
DIVISION 7 -
STREETS AND RELATED WORK
Supplemental Specifications Division 7 – Streets and Related Work
City of Iowa City 7-2 January 2022
SECTION 7010 – PORTLAND CEMENT CONCRETE PAVEMENT
1.07 SPECIAL REQUIREMENTS
(REPLACE) Permanent pavement will not be installed between 16th November and 31st March
each year without approval of the Engineer.
3.01 EQUIPMENT
A. Batching and Mixing Equipment:
3. Mixing:
d. (ADD) Addition of Mixing Water:
1) The addition of mixing water at the site of placement will not be allowed unless
otherwise approved by the Engineer. If approved, the batch shall be mixed at least
an additional 30 revolutions of the drum at mixing speed.
3.02 PAVEMENT CONSTRUCTION
C. Surface Fixture Adjustment:
3. (REPLACE) Boxouts for adjustment of fixtures will not be allowed unless otherwise
approved by the Engineer.
L. Joint Sealing:
3. Sealing:
f. (ADD) All expansion joints for intake throats are to be sealed for the entirety of the joint to
the back of curb as described in 7010, 3.02.L.3.a – 3.02.L.3.e.
3.04 PAVEMENT PROTECTION
A. Weather Conditions:
1. Cold Weather:
c. (ADD) Payment: When cold weather protection is necessary, additional payment will
be made as extra work at the rate of $1.00 per square yard of surface protected unless
otherwise as noted in the contract documents. Payment will be limited to protection
necessary within the contract period. Protection necessary after November 15 will be
paid for only when the Engineer authorizes work.
FIGURES
Figure 7010.101 – Joints
Sheet 5 of 8, Section B-B:
(ADD) All intake expansion joints are to be sealed for the entirety of the joint to the back of
curb.
Supplemental Specifications Division 7 – Streets and Related Work
City of Iowa City 7-3 January 2022
'E' JOINT IN CURB (View at Back of Curb):
(ADD) All intake expansion joints are to be sealed for the entirety of the joint to the back of
curb.
(ADD) 'EE' JOINT IN CURB (View at Back of Curb):
(ADD) All intake expansion joints are to be sealed for the entirety of the joint to the back of
curb.
(REMOVE) Figure 7010.103 – Manhole Boxouts in PCC Pavement
Figure 7010.901 – PCC Pavement Jointing
(ADD) If the roadway width differs from the dimensions shown, the jointing should be according
to the plans or otherwise approved by the Engineer.
SECTION 7011 – PORTLAND CEMENT CONCRETE OVERLAYS
1.07 SPECIAL REQUIREMENTS
(REPLACE) Permanent pavement will not be installed between 16th November and 31st March
each year without approval of the Engineer.
SECTION 7020 – HOT MIX ASPHALT PAVEMENT
1.07 SPECIAL REQUIREMENTS
(REPLACE) Permanent pavement will not be installed between 16th November and 31st March
each year without approval of the Engineer.
SECTION 7021 – HOT MIX ASPHALT OVERLAYS
1.07 SPECIAL REQUIREMENTS
(REPLACE) Permanent pavement will not be installed between 16th November and 31st March
each year without approval of the Engineer.
2.01 HMA OVERLAY MATERIALS
(ADD) Unless otherwise approved, use high traffic (HT), 1/2", no friction mix (PG58-28H). The
base and surface courses should be minimum lift thickness of 1.5 inches.
Supplemental Specifications Division 7 – Streets and Related Work
City of Iowa City 7-4 January 2022
SECTION 7030 – SIDEWALKS, SHARED USE PATHS, AND DRIVEWAYS
1.07 SPECIAL REQUIREMENTS
(ADD) Permanent pavement will not be installed between 16th November and 31st March each year
without approval of the Engineer.
2.07 DETECTABLE WARNINGS
(REPLACE) Detectable warning panels shall be cast iron with brick red color. Comply with the
proposed Accessibility Guidelines for Pedestrian Facilities in the Public Right-of-Way (also known
as PROWAG) for contrast and dimension requirements. Also comply with Iowa DOT Materials I.M.
411.
3.01 REMOVALS
G. (ADD) Pavement removal shall be full panels and extend into the nearest full panel at least
three feet beyond the trench limits, unless approved by the Engineer.
3.04 PCC SIDEWALKS, SHARED USE PATHS, AND DRIVEWAYS
F. Jointing:
6. (ADD) Connections to existing sidewalks and shared use paths: comply with Figure
7030.301. All bars must be epoxy coated unless otherwise approved by the Engineer.
FIGURES
(REMOVE) Figure 7030.102 – Concrete Driveway, Type B
(ADD) Figure 7030.301 – Sidewalk Connection
Supplemental Specifications Division 7 – Streets and Related Work
City of Iowa City 7-6 January 2022
SECTION 7040 – PAVEMENT REHABILITATION
1.01 SECTION INCLUDES
I. (DELETE) Core Hole Cutting and Replacement
1.02 DESCRIPTION OF WORK
H. (DELETE) Cutting and replacement of pavement cores.
1.07 SPECIAL REQUIREMENTS
(REPLACE) Composite pavements shall be replaced as composite pavement (e.g. 8" PCC and 3"
HMA), unless approved by the Engineer.
Permanent pavement will not be installed between 16th November and 31st March each year without
approval of the Engineer.
1.08 MEASUREMENT AND PAYMENT
K. (DELETE) Core Hole Cutting and Replacement:
1. Measurement: Measurement will be by count of the number of core holes replaced.
2. Payment: Payment will be made at the contract unit price per core hole replaced.
3. Includes: Unit price includes but is not limited to, cutting the core hole, vacuum excavation,
furnishing and placing backfill material and pavement, or replacing the pavement core
using waterproof bonding material, if specified.
2.01 MATERIALS
O. (DELETE) Rapid Set Patch Material: and all subsections.
3.01 GENERAL
G. (REPLACE) Pavement removal shall be full panels and extend into the nearest full panel at
least three feet beyond the trench limits, unless approved by the Engineer.
H. (ADD) For pavement patches in areas removed to determine utility locations (e.g. for utility
potholing), replace pavement according to Figure 7040.101, Figure 7040.102, and Figure
7040.103, unless otherwise directed by the Engineer.
3.02 FULL DEPTH PATCHING
A. Pavement Removal:
3. (ADD) Only wet sawing is allowed for pavement removals unless otherwise approved by
the Engineer.
3.11 (DELETE) CORE HOLE CUTTING AND REPLACEMENT
and all subsections.
Supplemental Specifications Division 7 – Streets and Related Work
City of Iowa City 7-7 January 2022
FIGURES
(REMOVE) Figure 7040.107 – Utility Core Hole Repair
SECTION 7060 – BITUMINOUS SEAL COAT
1.07 SPECIAL REQUIREMENTS
(REPLACE) Permanent pavement will not be installed between 16th November and 31st March
each year without approval of the Engineer.
SECTION 7090 – COLD-IN-PLACE PAVEMENT RECYLCING
1.07 SPECIAL REQUIREMENTS
(REPLACE) Permanent pavement will not be installed between 16th November and 31st March
each year without approval of the Engineer.
SECTION 7091 – FULL DEPTH RECLAMATION
1.07 SPECIAL REQUIREMENTS
(REPLACE) Permanent pavement will not be installed between 16th November and 31st March
each year without approval of the Engineer.
SECTION 7092 – CRACK AND SEAT EXISTING PCC PAVEMENT
1.07 SPECIAL REQUIREMENTS
(ADD) Permanent pavement will not be installed between 16th November and 31st March each year
without approval of the Engineer.
DIVISION 8 -
TRAFFIC CONTROL
Supplemental Specifications Division 8 – Traffic Control
City of Iowa City 8-2 January 2022
SECTION 8010 – TRAFFIC SIGNALS
2.01 UNDERGROUND
A. Handhole:
1. General:
a. Cable Hooks: (REPLACE) Provide four galvanized steel cable hooks with a minimum
diameter of 3/8 inch and a minimum length of 5 inches. Provide with Type I handholes
only.
3. Composite Handhole and Cover: (REPLACE) Composed of mortar consisting of sand,
gravel, and polyester resin reinforced by a woven glass fiber mat or of resin mortar and
fiberglass. The handholes shall have ANSI Tier 22 ratings and the covers shall have
ANSI/SCTE 77 2017 Tier 15 ratings. Covers shall be two-piece for Type III and Type IV
handholes. Provide a skid resistant surface on the cover. Provide two 3/8-16 UNC
stainless steel hex head bolts with washers.
4. (DELETE) HDPE Handhole and Cover: and all subsections
B. Conduit:
3. Plastic Conduit and Fittings:
b. HDPE:
1) (REPLACE) Comply with ASTM F 2160 (conduit) and ASTM D 3350 (HDPE
material), SDR 11.
5) (ADD) Conduit couplers for HDPE to HDPE connections shall be double e-loc
couplers.
6) (ADD) HDPE duct plugs shall be blank expandable duct plugs with elastomeric
gaskets and rope loops.
C. Wiring and Cable:
4. Ethernet Cable: (REPLACE) Provide outdoor use rated cable as included in the contract
documents, or as approved by the Engineer. Provide Category 5E (Cat5E), Category 6
(Cat6), or Category 6A (Cat6A) Cable.
6. (ADD) Pull Tape: Flat polyester pull-tape with a minimum pulling strength of 1250 lbs. and
permanent sequential footage markings.
2.02 DETECTION
B. Pedestrian Push Button Detectors:
2. Accessible Pedestrian Signals (APS) Push Button Stations:
i. (ADD) Polara iNavigator 2-Wire Push Button Stations with 9” x 15” front plate adapters
and 9”x15” R10-3e faceplates with braille. Button covers shall be black in color.
3. Solid State Pedestrian Push Buttons (non-APS):
Supplemental Specifications Division 8 – Traffic Control
City of Iowa City 8-3 January 2022
e. (ADD) Polara BullDog push buttons. Body color shall be black.
4. Signs: (REPLACE) Furnish R10-3e signs complying with MUTCD and with directional
arrows as shown on the plans.
C. Video Detection Camera System:
3. (ADD) Equipment: Iteris Vantage Next video detection system, processors, and cameras.
F. (ADD) Radar Detection System:
1. Equipment: Wavetronix radar detection system.
2.04 CABINET AND CONTROLLER
A. Controller, Cabinet, and Auxiliary Equipment: Comply with the latest edition of NEMA TS1
or TS2, CalTrans model 2070, or ITE advanced transportation controller (ATC) standards.
1. Controller:
h. (ADD) Siemens m60 Series ATC controller.
2. Cabinet:
k. (ADD) The cabinet shall contain strong mounting shelves to accommodate the
mounting of the controller and all auxiliary equipment. The mounting shelves shall
permit the controller and all auxiliary equipment to be withdrawn from the cabinet for
inspection or maintenance without breaking any electrical connections or interrupting
operation of the controller.
l. (ADD) The cabinet shall contain two thermostatically controlled duct fan units with a
minimum rating of 100 CFM in free air shall be installed in the cabinet to provide forced
air ventilation through the cabinet. The fan unit shall be mounted to the inside top of
the cabinet and shall be easily removed and replaced without having to dismantle any
part of the cabinet or exhaust duct system. The thermostat controlling the fans shall be
manually adjustable to turn on between 90 degrees F and 150 degrees F with a
differential of not more than 10 degrees F between automatic turn-on and turn-off. The
fans shall intake air through filtered vents located near the bottom of the cabinet or
cabinet door and exhaust it through a weather-proof, screened duct located near the
top of the cabinet. Fiberglass type dry filters shall be used to cover the air intakes into
the cabinet. These filters shall be easily removed and replaced and be of standard
dimensions commercially available. The filters shall be provided with positive
retainment on all sides to prevent warpage and entry of foreign matter around the
edges.
m. (ADD) Provide a piggy back cabinet for the battery backup system.
B. Uninterruptible Power Supply Battery Backup System:
5. (ADD) Alpha Technologies battery backup system with an ethernet interface for remote
monitoring.
Supplemental Specifications Division 8 – Traffic Control
City of Iowa City 8-4 January 2022
2.05 POLES, HEADS, AND SIGNS
A. Vehicle Traffic Signal Head Assembly:
1. Housing:
a. (REPLACE) Individual signal sections made of durable polycarbonate. Color shall be
black and integral to the materials composition.
7. Mounting Hardware:
c. (ADD) All traffic signal heads shall be side mounted when installed on a vertical pole.
Post top mounting is not allowed. Factor side mounting and minimum mounting height
requirements when determining pedestal pole shaft lengths.
8. LED Modules: (REPLACE) Comply with current ITE standards and consistent with cabinet
voltage requirements. LED modules shall be provided with a 15-year performance
warranty.
B. Pedestrian Traffic Signal Head Assembly:
1. Housing:
a. (REPLACE) Made of a durable polycarbonate. Color shall be black and integral to the
materials composition.
b. (REPLACE) Self-contained unit capable of separate mounting or inclusion in a signal
face containing two signal sections rigidly and securely fastened together.
3. LED Module:
c. (ADD) LED modules shall be provided with a 15-year performance warranty.
C. Traffic Signal Poles and Mast Arms:
1. General:
c. (REPLACE) Use continuously tapered, round, steel poles of the anchor base type.
Fabricate poles from low carbon (maximum carbon 0.30%) steel of U.S. standard
gauge.
j. (ADD) Luminaire mounting height shall be 30 feet unless otherwise specified.
k. (ADD) Orient luminaire on mainline mast arm at 350 degrees to light cross street
signing.
D. Traffic Signal Pedestal Poles:
1. Materials: (ADD) Unless approved by the Engineer, follow 8010, 2.05.F and Figure
8010.108, for Pedestrian Push Button Posts.
F. (ADD) Pedestrian Push Button Post:
1. Material: (REPLACE) Use Frey Manufacturing Corporation Crosswalk Pedestals that
comply with Figure 8010.108, as revised. Materials shall be painted black, per
manufacturer’s recommendations, when installed in the Downtown area.
Supplemental Specifications Division 8 – Traffic Control
City of Iowa City 8-5 January 2022
3.01 UNDERGROUND
A. Handhole:
2. Excavation: (REPLACE) Excavate as necessary to accommodate the handhole and
granular base. The Contractor is responsible for incidental sidewalk removal and
replacement necessary to complete the signal construction. Whenever excavation is made
across parkways, gravel driveways, sodded areas or other surfaces, the sod, topsoil,
crushed stone and gravel shall be replaced or restored as nearly as possible to its original
condition and the whole area involved shall be left in a neat and presentable condition.
Concrete sidewalk pavements, base courses, bituminous surfaces and other disturbed
surfaces shall be replaced with new materials and the cost shall be incidental to the work.
All waste material and debris shall be disposed of at a sanitary landfill, or other site
approved by the Engineer, at the Contractor’s expense.
5. Conduit:
d. (ADD) Cap unused conduits with duct plugs.
6. Cable Hooks:
a. (REPLACE) Install cable hooks centered between the knockouts and the top of the
handhole for Type I handholes only.
B. Conduit:
1. General:
a. (REPLACE) Place conduit to a minimum depth of 30 inches and a maximum depth of
48 inches below the gutterline, unless utility conflicts require deeper placement. When
conduit is placed behind the curb, place to a minimum depth of 30 inches and a
maximum depth of 48 inches below top of curb.
e. (REPLACE) Install duct plugs in conduit ends. When duct plugs are not practical, pack
conduit ends with conduit sealing compound.
g. (ADD) Install pull tape in each conduit segment and secure to duct plugs at each end.
2. Trenched Installation:
c. (ADD) The Contractor is responsible for incidental sidewalk removal and replacement
necessary to complete the signal construction. Whenever excavation is made across
parkways, gravel driveways, sodded areas or other surfaces, the sod, topsoil, crushed
stone and gravel shall be replaced or restored as nearly as possible to its original
condition and the whole area involved shall be left in a neat and presentable condition.
Concrete sidewalk pavements, base courses, bituminous surfaces and other surfaces
shall be replaced with new materials and the cost shall be incidental to the work.
C. Wiring and Cable:
1. (REPLACE) Where practical, follow color codes and make sure cables are properly labeled
at the controller with durable labels, or other appropriate methods, attached to the cables.
Label home runs for signal and video cables as follows: northeast corner is blue, southeast
corner is orange, southwest corner is yellow, and northwest corner is green. Other Iowa
City cable and color codes are as follows:
Supplemental Specifications Division 8 – Traffic Control
City of Iowa City 8-6 January 2022
Left turn signals = 1 tape
Through signals = 2 tapes
Right turn signals = 3 tapes
4 Conductor
Cables 7 Conductor Cables 9 Conductor Cables – Pedestrian
Signals
Green ball = green
Yellow ball = black
Red ball = red
Common = white
Green ball = green
Yellow ball = orange
Red ball = red
Green arrow = blue
Yellow arrow = black
Common = white and
white/black
Main street walk = green
Main street don’t walk = red
Side street walk = green/black
Side street don’t walk = red/black
Common = white
Main street push button = orange
Side street push button = black
Common = white/black
Common = blue
D. Footings and Foundations:
1. Excavation: (ADD) The Contractor is responsible for incidental sidewalk removal and
replacement necessary to complete the signal construction. Whenever excavation is made
across parkways, gravel driveways, sodded areas or other surfaces, the sod, topsoil,
crushed stone and gravel shall be replaced or restored as nearly as possible to its original
condition and the whole area involved shall be left in a neat and presentable condition.
Concrete sidewalk pavements, base courses, bituminous surfaces and other surfaces shall
be replaced with new materials and the cost shall be incidental to the work.
4. (ADD) Removal: Where shown on the plans, the Contractor shall remove the top of the
existing mast arm footings, anchor bolts, and conduits to 36 inches below the existing top
of curb or edge of pavement elevation. Waste materials shall be removed from the site
and disposed in accordance with local regulations. Backfilling for the removal shall be
performed according to Section 3010. The upper 8 inches of the removal area, if outside
the proposed pavement, shall be backfilled with topsoil.
3.02 DETECTION
E. (ADD) Radar Detection System: Install according to the manufacturer’s recommendations
and as specified in the contract documents.
3.05 POLES, HEADS, AND SIGNS
A. Vehicle and Pedestrian Traffic Signal Heads:
5. (ADD) Pole mounted signal heads and pedestrian push buttons are shown on the plans
and schematic drawings in schematic form only. Pole mounted signal heads are generally
intended to be mounted on the face of pole with respect to oncoming traffic. Modifications
to this are required when the view of the pole mounted signal indication is blocked.
Pedestrian push buttons shall be located on the pole face so the arrow on the R10-3e sign
directs pedestrians to the appropriate crosswalk.
The location of signal heads in which the view of the indications is blocked or partially
blocked by utility poles, trees, other signal heads or any physical obstructions shall be
adjusted to a location approved by the Engineer. Standard heights and locations shown
on the plans are typical for unobstructed locations. Signal heads installed without approval
Supplemental Specifications Division 8 – Traffic Control
City of Iowa City 8-7 January 2022
of the Engineer, which in the opinion of the Engineer are obstructed, shall be relocated at
the Contractor’s expense. Holes in the poles due to this signal relocation shall be plugged
in a manner acceptable to the Engineer.
FIGURES
(ADD) Figure 8010.108 – Pedestrian Pole and Pedestrian Post Details
Figure 8010.302 – Traffic Signal Pole Foundation
(ADD) Only circular footing tops can be used.
(ADD) Top of footing should be 2 inches above finish grade.
(ADD) All types should have a 1” chamfer on the top of the foundation as shown on the Type
B Foundation.
0.75"
0.5"
0.75"
0.5"42"57.5" ±ENGINEERING DIVISION
PEDESTRIAN POLE AND
PEDESTRIAN POST DETAILS FIGURE 8010.108
1/4" HOLE AND 15 GL GROUND TERMINAL
ASSEMBLY NO. 4840
4" SCHEDULE 40 ALUMINUM PIPE
PART NO. 11PB PEDESTAL BASE CASTING
PART NO. 11 PBC BLANK COVER CASTING COVER
MAY BE CUSTOMIZED WITH LOGO OR DESIGN
6" FLANGE BOLT CIRCLE
ASSEMBLY NO. CP6A PEDESTAL BASE,
COVER, HARDWARE, AND ANCHORS
(2) 3/8" SET SCREW S- STANDARD
CABLE TETHER ANCHOR ATTACHMENT (OPTIONAL)
LEVEL BASE AND ANCHOR FLANGE
FLAT TO SHIMS AND/OR GRADE
PART NO. 11 PB
PEDESTAL BASE COVER
25ABPK (4) 5/8"x7-1/2" ANCHOR
BOLTS, WASHERS AND NUTS
INCLUDED WITH ASSEMBLY
CP6A. EPOXY AND ANY LEVELING
SHIMS BY INSTALLER
FLANGE 6" BOLT CIRCLE
1/4" NOM. CASTING THICKNESS
PART NO. 25GL GROUND LUG
DOOR OPENING: 3.75"x5.75"
DOOR CASTING, BOLT AND WASHER
(2) SET SCREWS STANDARD, OR
STAINLESS STEEL BOLT INCLUDED
WITH TETHER OPTION
ASSEMBLY NO. CP6A
(INCLUDES ANCHORS)
ASSEMBLY NO. 4840 4"X48"
SCHEDULE 40 ALUMINUM PIPE
(2) 1/4" INSERT NUTS INCLUDED
PART NO. IN1440 1/4"
INSERT NUT TO
MOUNT CONTROL
SWITCH
EN2-3TB1-G-BD-EB
POLARA PUSHBUTTON
TOP CAP ASSEMBLY NO. TCSS
1/2" EXPANSION JOINT
TYP EACH SIDE
FIELD PLACE SWITCH TEMPLATE SO
PUSH BUTTON IS 42" ABOVE GRADE,
OR AS OTHERWISE SPECIFIED.
NOTE:SCHEDULE 40 PIPE
REQUIRES 1/4" INSERT NUTS SET
INTO PIPE. SCHEDULE 80 PIPE MAY
BE DRILLED AND TAPED FOR 1/4"-20
BOLT
6" BOLT CIRCLE
EPOXY TO SET ANCHORS
SUPPLIED BY INSTALLER
DRILL (4) HOLES
TO EMBED ANCHORS
18" DIA
12" MIN
6.75"
6" MIN
2"
6.75"6"
0.75"
SIDEWALK
LANDING AREA
CENTER OF
PUSH BUTTON
4.5"10"5
8" HOLES FOR
INSULATION SLEEVE
CABLE TETHER (OPTIONAL)
REVISED JANUARY 2022
Supplemental Specifications Division 8 – Traffic Control
City of Iowa City 8-9 January 2022
SECTION 8020 – PAVEMENT MARKINGS
3.01 EQUIPMENT
C. Pavement Marking Removal:
4. (ADD) Removing pavement markings should be done by water blasting unless grinding is
approved by the Jurisdiction.
3.02 CONSTRUCTION
H. Removal of Pavement Markings:
2. Process:
d. (REPLACE) Removing pavement markings shall be done by water blasting unless
grinding or another method is approved by the Jurisdiction. Open abrasive blasting or
dry grinding without containment is not allowed.
SECTION 8030 – TEMPORARY TRAFFIC CONTROL
1.07 SPECIAL REQUIREMENTS
D. (ADD) Only put up temporary traffic control when work is to occur. Temporary traffic control
cannot stay up just for staging of equipment or storage materials.
2.06 FLAGGERS
D. (ADD) Flaggers are required on arterials, where at least one lane in each direction cannot be
maintained, and in other circumstances as required by the Engineer.
DIVISION 9 -
SITE WORK AND LANDSCAPING
Supplemental Specifications Division 9 – Site Work and Landscaping
City of Iowa City 9-2 January 2022
SECTION 9010 – SEEDING
3.10 ACCEPTANCE AND WARRANTY
A. Acceptance:
1. (DELETE) Guarantee in writing that all work has been completed as specified and provide
the date that all activities were completed. When a warranty is a separately-bid item, this
also establishes the beginning of the warranty period.
2. (REPLACE) Acceptance will occur, provided seeded areas are in a live, healthy, growing,
and well-established condition without eroded areas, bare spots, weeds, undesirable
grasses, disease, or insects. Additionally, the seeded areas will meet the definition of final
stabilization found in Part VIII of the Iowa National Pollutant Discharge Elimination
(NPDES) General Permit No. 2.
a. Projects without a separately-bid warranty will be accepted no sooner than 60 days
from the date that all activities were completed.
b. When a warranty is established as a bid item and the warranty period exceeds 60 days,
projects may be accepted after all specified work, excluding the warranty, is
satisfactorily completed.
B. Warranty:
1. (ADD) The warranty period begins 60 days after completion of work or acceptance of the
public improvements, whichever occurs sooner.
SECTION 9030 – PLANT MATERIAL AND PLANTING
2.06 TREE WRAPPING MATERIAL FOR WINTER PROTECTION
(REPLACE) 4-inch diameter Leonard Rigid Plastic Mesh Tree Guard or otherwise approved by the
Engineer.
3.01 ALLOWABLE PLANTING DATES
B. Deciduous Plants (Balled and Burlapped and Container): (REPLACE) September 1 to
November 15 and in the spring prior to June 1.
3.06 PLANTING
B. Balled and Burlapped and Container Plants:
4. Balled and Burlapped Plants:
b. (REPLACE) After plant placement, cut and remove entire twine, burlap, and wire
baskets from root ball prior to placing backfill material.
3.09 TREE PROTECTION
A. (REPLACE) Place tree protection mesh around the trees immediately after planting. Mesh
should be as specified in Section 9030, 2.06 – Tree Wrapping Material for Winter Protection.
Supplemental Specifications Division 9 – Site Work and Landscaping
City of Iowa City 9-3 January 2022
C. (REPLACE) Make sure the protection mesh reaches from the ground line to the height of the
first branch. If plant has multiple stems, cover each stem separately. Secure wrapping mesh
to itself once placed around the tree to secure the void space with enough ties to prevent
exposure of the trunk to damages from animals or other hazards.
D. (DELETE) Remove tree protecton by April 1 of the next spring.
3.10 STAKING AND GUYING
C. (DELETE) Guying: and all subsections.
FIGURES
Figure 9030.102 – Tree Staking, Guying, and Wrapping
(DELETE) Sheet 2 of 2
SECTION 9072 – COMBINED CONCRETE SIDEWALK AND RETAINING WALL
1.01 SECTION INCLUDES
(ADD) Combined Concrete Curb and Sidewalk
1.02 DESCRIPTION OF WORK
(ADD) Constructing combined concrete curb and sidewalk.
1.08 MEASUREMENT AND PAYMENT
D. (ADD) Combined Concrete Curb and Sidewalk:
1. Measurement: Measurement will be in square yards of sidewalk.
2. Payment: Payment will be at the unit price of square yards of the sidewalk.
3. Includes: Unit price includes, but is not limited to, excavation; foundation preparation;
furnishing and placing concrete and reinforcing steel; joint material; subdrain; porous
backfill material; suitable backfill material; finishing disturbed areas; and shoring as
necessary.
2.01 MATERIALS
H. (ADD) Combined Concrete Curb and Sidewalk:
1. Portland Cement Concrete: Comply with Section 7030, 2.01.
2. Reinforcing Steel: Comply with Iowa DOT Section 4151.
3. Expansion Joint: Comply with Iowa DOT Article 4136.02. Use resilient filler when the
type is not specified.
3.02 INSTALLATION
A. General:
Supplemental Specifications Division 9 – Site Work and Landscaping
City of Iowa City 9-4 January 2022
1. (REPLACE) Comply with Section 6010 for combined concrete sidewalk and retaining wall.
Comply with Sections 6010, 7010, and 7030 for combined concrete curb and sidewalk.
E. (ADD) Combined Concrete Curb and Sidewalk:
1. Sidewalk: Comply with Section 7030, 3.04.
2. Integral Curbs: Comply with Section 7010, 3.02.G.
FIGURES
(ADD) Figure 9072.301 – Combined Concrete Curb and Sidewalk
DIVISION
ENGINEERING COMBINED CONCRETE CURB AND SIDEWALK FIGURE 9072.301
LEGEND
PAVEMENT
SUBBASE
CLASS V BACKFILL MATERIAL
(E.G. TOPSOIL)
UNDISTURBED EARTH
FIGURE NOTES:
1.TARGET CROSS SLOPE OF 1.5% WITH A MAXIMUM CROSS SLOPE OF 2.0%.
2.SEE PLANS FOR SLOPES. 6H:1V OR FLATTER.
6" STANDARD CURB
WIDTH OF SIDEWALK, 5' MIN
OR AS SHOWN ON PLANS
6" STANDARD CURB,
SEE FIGURE 7010.102
SEE NOTE 1 PARKING SLOPE, SEE FIGURE
7030.201 AND PLANS
SIDEWALK WIDTH PLUS 18"
SEE NO
T
E
2
8" CURB
WIDTH OF SIDEWALK, 5' MIN
OR AS SHOWN ON PLANS
8" CURB, SEE DETAIL A
SEE NOTE 1 PARKING SLOPE, SEE FIGURE
7030.201 AND PLANS
SIDEWALK WIDTH PLUS 18"
SEE NO
T
E
2
3"±
6.0"2.0"
6.0"
4.0"
0.75"
DETAIL A, 8" CURB
8.0"
#4 LONGITUDINAL BARS
#4 BARS, 10"
MIN LENGTH
AND 18" OC
DETAIL NOTES:
1.ALL BARS MUST BE EPOXY COATED.
Supplemental Specifications
City of Iowa City January 2022
END OF SUPPLEMENTAL SPECIFICATIONS