CCP 03-31-2003 - Laserfiche WebLink

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Existing utilities also provided a challenge to the construction of an underpass. There are crossings of gas lines, watermain, and sanitary sewer, all of which would need to be raised, lowered or relocated. The sanitary sewer provides the greatest challenge because it would be difficult to relocate. The underpass would need to be constructed below the sanitary sewer, which is already 8-feet below the proposed road profile. The bottom of the underpass box would be approximately 21 to 22 feet below the proposed roadway profile. . Drainage is also a concern; a drain system will need to be constructed for the tunnel since it would be below surrounding grades. The nearest connection point to the proposed storrn sewer along CSAH 96 would be approximately 700-feet away. Overpass (l4-foot wide bridge. 12-foot walkway) Similar to the underpass the approaches will require a large amount of land and grading to meet ADA requirements. An over pass would be easier to construct after CSAH 96 has been completed and would have minimal impacts to the traffic on CSAH 96 during construction. It would also be easier to avoid existing utilities with an overpass verses an underpass. Considerations Both the underpass and overpass options will require a trail extension on the north side CSAH 96 . of approximately 360(}'feet to connect between Hamline Avenue and the North Heights Church entrance. There is no plan at this time to extend the trail to the west on the north side ofCSAH 96 beyond the North Heights Church entrance. As of now there is not a set plan for the redevelopment of the TCAAP, which should be the driving force behind any location for an underpass or overpass. Both the underpass and overpass options will require regular maintenance and inspections as they would be bridges and would be added to the Cities list of Bridges that are required to be inspected every 2to 3 years. CSAH 96 Project Impacts The plans for the reconstruction of CSAH are complete and the project is almost ready to bid out. Including an underpass with this project would require the design of the underpass and subsequent review and approval by MnDOT. As the intent of CSAH 96 reconstruction project is to complete it in one year the project would be pushed into the summer of2004 at the earliest for construction. An overpass could be constructed as a separate project from CSAH 96 and could be completed when the planned TCAAP redevelopment is better known. .