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HomeMy WebLinkAboutJuly 15, 2014 presentation to councilCity Council Work Session July 15, 2014 Tonight’s Objectives: Review activities since the April work session Discuss design Discuss parameters for aesthetic and landscape treatments Seek direction on: •Alignment and sidewalk at north end •Trail option along the retaining wall Agenda: Design update Aesthetics and landscape parameters Trail options at Dubuque Street retaining wall Mayflower to Taft Speedway Dubuque Street •Roadway alignment •Impact minimization to residential properties •Sidewalks Iowa River Trail and east sidewalk – Mayflower to Foster •Alignment •Elevation Extent and Goals Mayflower to Foster Minimize retaining wall Minimize residential impacts Design curves for traffic calming Improve intersection geometry Assess east sidewalk Potential driveway locations Sweeping curves signal transition Improves Taft Speedway and Ridge Road intersections Ridge Road intersection stays in existing location Eliminates retaining wall at 1818 N. Dubuque Provides better opportunity for easterly sidewalk continuity to Foster Mayflower bus pull off and crosswalk improved NB lanes/bus pull off are parallel to front of Mayflower No difference in cost or elevation Cliff Apts to Foster Within existing ROW Continuity provided Save ≈ $18k today Pay ≈ $152k in future Parallel to roadway Meander thru Terrell Mill Meander at or below 100+1 Costs of options ≈ equal Includes retaining walls 2’ to 5’, Brown to Park Wider sidewalk on east side Existing parking maintained No impact to structures •729 N Dubuque •804 N Dubuque •816 N Dubuque Trail connections Railing concepts Potential bump-outs and seating Street and bridge lighting Plantings Bio-swales and median drainage Prioritized list of project elements Site Analysis Workshop held March 4, 2011 Bridge Bike / pedestrian traffic accommodations – under / over / on the bridge Bumpouts on bridge •Seating •Overlook •Fishing (widen sidewalk) Integrate aesthetics with Hancher Auditorium design and surrounding environment Road Multi-modal safety improvements Enhance urban parkway character Median – function/aesthetics Landscape – urban character Non-parallel alignment of Dubuque St NB and SB lanes Preserve viewsheds Traffic calming Amenities/Features Views of river, termini (i.e. boathouse from bridge, Park Rd at Dubuque St, etc) Preserve corridor character •Natural setting •No Disneyland Lighting – street / pedestrian •Reduce glare •Provide safety •Understated •Night Sky compliant Trail / Pedestrian Connectivity Option A,C Option B Section 32+50 8’ 10’ 7’ 8’ 10’ 2.5’ 4.5’ 6’ Option A,C Option B Section 36+00 8’ 10’ 8.5’ 8’ 10’ 10’ 6’ Option B Option C Option A Section 39+50 8’ 10’ 7.5’ 10’ 8’ 10’ 7.5’ 8’ 10’ 10.5’ 10’ Option B Option C Section 41+00 Option A 8’ 5’ 10’ 8’ 10’ 5’ 8’ 5’ 10’ 10’ 10’ Option Added Cost Reason for Cost Width of Trail/Multi- use Path Low Elevation Minimum Offset to River Permitting Case Increased Time for Approvals Pedestrian Safety Option A: Trail on Wall Only * $0 NA 10’ 100+1 or above 10’ Standard process for entire project (4-6 months) NA All pedestrians visible to traffic Option B: Trail on and Below Wall $470,000 Additional length and height of retaining wall required, bridge underpass 10’/6’ Trail 100+1 or above / Path at 10 year floodplain 8 ’ Increased coordination and study with permitting agencies Additional 2 - 6 months Pedestrians not visible on lower trail. Option C: Trail on Wall / Future extension south of Park Road $240,000 Additional length of trail south of Park Road 10’/10’ 100+1 or above north of Park Rd / 100+1, or above south of Park Road within study limits 27’ Increased coordination and study with permitting agencies Additional 2 - 6 months All pedestrians more visible than with Option B. * Staff recommends Option A and the first 50’+/- of Option C Foster Segment Mayflower Segment River Segment Campus Segment Foster Segment •Clustered tree massings •Emphasize traffic calming •Extend wooded hillside to Dubuque Street •Preserve significant existing trees Mayflower Segment •Define the room with tree massings at perimeter, buffer undesirable views •Emphasize relationship of Mayflower to Terrel Mill Park •Low-maintenance median plantings with color, texture, purpose River Segment •Soften hardscape •Emphasize cliff face •Promote views of river and university Campus Segment •Complement campus and park