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HomeMy WebLinkAboutMeetingPresentationWelcome! Hear your input on: Alternatives selected for further analysis, and Screening criteria Agenda: 4:30 –5:30 Open house 5:30 –Brief presentation followed by Q&A 6:15 –7:00 Open house Dubuque Street carries 25,000 vehicles a day between I-80 and: Downtown University of Iowa Campus Three hospitals Park Road New HEC-RAS models Calibrated with data from 2008 flood Updated cross sections Incorporated all proposed and constructed flood mitigation projects Key finding: Raising Park Road Bridge will lower the water surface elevation upstream. •Elevate Dubuque Street •Improve storm sewers •Increase storage Phase 1: Plan The planning process, called a NEPA study is expected to be completed in 2012. NEPA is required for projects seeking federal funds or permits. Phase 2: Design After the NEPA process is completed, final design work will begin. Detailed design and engineering will take approximately 18 to 20 months. Phase 3: Build Construction could begin as early as the spring of 2014. At this time, the team estimates that work will take approximately two construction seasons. We are here Purpose of the Proposed Action: Provide a reliable multimodal transportation corridor that reduces the impact of flooding on the local transportation system and the Iowa River corridor. Need for the Proposed Action: Maximize the reliability of Dubuque Street Maximize the reliability of Park Road Bridge Minimize backwater created by Park Road Bridge Address roadway deficiencies on Dubuque Street and Park Road Goals / Screening Criteria No-Build System management Improve alternate routes Off existing alignment Raise Dubuque Street & Park Road Bridge: •One foot above 2008 flood level •One foot above 500 year flood •Combination of one foot above 500 and 100 year flood Initial Alternatives Bicycles and pedestrians Constructability Cost Emergency access Flood impacts Gateway Green options Park Road/Dubuque Street Parks, historic structures and sites Transit Bridge Alternatives Above deck •Below deck •Other variations Cable stayed Extradosed Girder •Steel or concrete •Haunched or constant depth Suspension Segmental Goals/Screening Criteria Construction Closures Construction Location Cost/Complexity Dubuque Street Elevation Footprint Maintenance River Impacts Traffic Flow Speed of Construction Vandalism Viewshed •Cable stayed •Girder •Spandrel arch A new Park Road Bridge: Would be higher above the river than the existing bridge Would require raising the intersection of Park Road and Dubuque Street Could allow traffic to use the existing bridge during construction Steel or concrete Similar to Mississippi River Bridge in Burlington, Iowa Steel and concrete Similar to existing Park Road Bridge Steel or concrete Similar to Iowa Avenue Bridge What do you think? Talk with a team member during the open house Fill out a comment form Fill out an online survey or Ask a question during Q&A Need detailed info? Talk with a team member during the open house Fill out a question card; City staff will be in touch with you personally or Submit a question via the web site www.iowacitygateway.org