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Stakeholders Working Group August 22, 2012 1 Project Update How - - PowerPoint PPT Presentation
Stakeholders Working Group August 22, 2012 1 Project Update How - - PowerPoint PPT Presentation
Stakeholders Working Group August 22, 2012 1 Project Update How we got New Information here 2 How we got here Need to fix bridge / Colorado Bridge Enterprise funding Environmental Assessment to determine best way to address
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How we got here
Need to fix bridge / Colorado Bridge
Enterprise funding
Environmental Assessment to determine
best way to address this need
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How we got here (cont.)
Alternatives development and evaluation
process to select best alternative
Public input to understand issues and gain
input
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How we got here (cont.)
Independent Peer Review Current Alternatives 1 and 3
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Alternatives
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Alternatives
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Alternatives
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Viewsheds – View to Downtown
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Viewsheds – View from Hot Springs
1A 1B 3A & E 3D
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Viewsheds – View from I-70 WB
1A 1B 3A & E 3D
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Viewsheds – View from 7th Street
1A 1B
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Viewsheds – View from 7th Street
3A & E 3D
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Bicycle Pedestrian Options
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Bicycle Pedestrian Options
Alternative 3A
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Bicycle Pedestrian Options
Alternative 3E
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Bicycle Pedestrian Options
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Traffic Simulations
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Other Considerations
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Next Steps
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THANK YOU
for attending the Public Open House
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Background Informationi
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Project Schedule
If the project receives the federally required approvals, construction would begin in late 2014.
Tasks Initiation & Feasibility Alternatives NEPA Documentation Design Construction Start 2011 2012 2013 2014
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Alternatives Screening Process
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Level 2 Screening Criteria
Purpose & Need Criteria
Purpose & Need Element #1: Improve Connectivity Between Downtown and Hot Springs For Through Traffic Purpose & Need Element #2: Address Functional, Structural, Emergency Service, Reliability Relative ability to minimize risk of bridge closure Relative ability to address structural deficiencies Relative ability to improve emergency access Relative ability to address functional deficiencies Relative bridge life
Additional Criteria (continued)
Community Relative harmony with community Consistent with City Planning Relative ability to reduce and minimize construction impacts Relative ability to minimize private property impacts Relative ability to incorporate sustainable elements into design Transportation Relative ability to safely accommodate transportation users Relative ability to reduce and minimize construction impacts Relative ability to maintain and improve multimodal connections Relative ability to maintain or improve transportation
- perations
Additional Criteria
Design and Feasibility Relative cost of alternative Relative ability of alternative to meet design standards Relative ability to construct Environmental Relative impacts to historic resources Visual/aesthetics - General-from river, pool, etc. Visual/aesthetics - Cooper and/or Colorado Visual/aesthetics - Grand Avenue Relative noise and air quality impacts Relative impacts to parks and recreation resources Relative impacts to water and aquatic resources
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Under this phasing option, new bridge supporting structures would be built to the outside of the existing bridge, leaving 4 lanes on the existing bridge during most of the construction period. Once the outer supporting structure is completed, the driving surface of the new bridge would be filled in either incrementally or during a full closure (+/- 1 month). The existing bridge would ultimately be removed.
Phasing Possibilities and Options
Outside – Inside Concept
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Phasing Possibilities and Options
Half – Half Concept
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Phasing Possibilities and Options
Slide-in Concept
Prefabricated bridge parts are built off site but nearby, and slid into place.
Slide in Unit Prefabricated Spans
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Phasing Possibilities and Options
Slide-in Concept
Build superstructure to west on falsework
Build new columns under existing bridge
Remove existing bridge
Slide new superstructure onto new columns