City Council Minutes 2012 09 18 - Laserfiche WebLink

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City Council Meeting Minutes September 18, 2012 Page 4 of 8 Mayor Muckle felt the expansion will benefit both communities. He called for public comment and hearing none, closed the public hearing. MOTION: Mayor Pro Tern Dalton moved to approve Resolution No. 62, Series 2012, seconded by Council member Loo. All were in favor. DISCUSSION/DIRECTION/ACTION DIVERGING DIAMOND INTERCHANGE DESIGN CONCEPT Mayor Muckle requested a staff presentation. Planning Director Russ distributed graphics of the design to the audience. He explained since the City Council looked at this Diverging Diamond Project in July, the design concept has changed. The innovative nature of this interchange elevated the design team's awareness of the complexities of the design and function of this project. In response, City staff and CDOT organized a Peer Review including a panel of experts from Salt Lake City, UT; Portland, OR; and Atlanta, GA, who were familiar with DDIs built elsewhere. Based on those other projects, the design team modified the interchange design to apply the DDI lessons learned nationally. Specific lessons learned apply to the following components of the interchange. 1. Speed differentials 2. Angles of approach at the cross-over 3. Vehicle and lanes widths design 4. Reverse curves and tangents 5. Pedestrian visibility Staff believes. and CDOT concurs, the best approach given the available budget is to locate sidewalks in a center walkway instead of on the side of the bridge. Shifting the walkway to the middle will work best with a single "basket handle" arch functionally integrated into the center walkway design. This approach defines the path for pedestrians and creates a physical framework separating pedestrians from the adjacent vehicle traffic. It provides an important sense of safety for pedestrians using the bridge. CDOT indicates the DDI, including the "basket handle" arch, can be included in the Phase 2 Managed Lanes Project for a total of $12.5 million. The RTD has committed $3.5 million for a portion of the transit elements of the project. Staff expects the Town of Superior to contribute $4.0 million to the project and a $500 thousand administrative fee to the City of Louisville per the terms if the US 36 IGA. The remaining funding can be secured from the State of Colorado from the State's FASTER program (Funding Advancement for Surface Transportation and Economic Recovery) for the remaining portion of the project cost that CDOT has identified as transit related ($927,513). If Louisville and Superior split the remaining costs equally and if Superior pays Louisville a 4% fee to manage the project (as is contemplated by the existing IGA between the two municipalities), Louisville's total net costs would be just over$3.5 million in capital improvement budget and $500 thousand from the Town of Superior's administrative fee