1A, US 10CR 96 Grade Separation & CSAH 96 Improvements - Project Update

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City of Arden Hills August 5, 2009 Page 2 of3 Second, there are no pedestrian or bicycle destinations along TH 10. As a result, the proposed overpass would be rarely used. Any user of the bridge would come from the trail or sidewalk along CSAH 96. The proposed design of the TH 10 ramps and/or Old Hwy 10 roadway would need to be modified to connect users from the CSAH 96 to the overpass. These modifications would result in additional impacts to the TCAAP property or homes on Lakeshore Place. Box Culvert Underpass - A 10' tall by 14' wide box culvert underpass was evaluated at the following locations where grades appear conducive: · West of Future Rice Creek Parkway · East of Snelling A venue · East of Keithson Drive Each of these locations presents opportunities and challenges in achieving an underpass crossing. Work would include removal and replacement of 80' to ]00' of existing CSAH 96 roadway, excavation, underpass and retaining wall structures, lighting and landscaping, and trail connections on either side of the roadway. In addition, each location would require a storm sewer lift station to provide drainage for the underpass. Cost associated with underpass construction would be expect between $600,000 and $800,000 and could be constructed independent of the TH ] O/CSAH 96 project. The Rice Creek Parkway location could be constructed when the Rice Creek Parkway intersection is established and North Heights church reconfigures their parking lot. Installation at this location would require close cooperation with the church and redevelopment of the TCAAP site. This site is in close proximity to the future signalized intersection, however would provide a grade-separated crossing opportunity for those uncomfortable crossing at-grade. The Snelling A venue location would provide an opportunity to extend trail south to Royal Hills Park and connect with future recreational areas on the TCAAP site. This location would require the acquisition of vacant private property. The Keithson Drive location could be constructed on property currently owned by the City of Arden Hill on the south side and Ramsey County on the north side. This location includes an existing city trail that extends through residential areas south of CSAH 96. Pedestrian Bridge - A stand alone pedestrian bridge was considered east of the future Rice Creek Parkway. The existing grades at this location are conducive for an overpass. Construction of the overpass would require acquisition of a private residence on the south side of CSAH 96. This site is in close proximity to the future signalized intersection, however would provide a grade-separated crossing opportunity for those uncomfortable crossing at-grade. Figure 1 illustrates the locations and conceptual designs considered for each alternative. Findings and Recommendations If the City wants a grade-separated crossing, the recommended location of a crossing of CSAH 96 is east of Keithson Drive. This location is consistent with the recommendation in the City's Parks and Trails Plan and would connect to existing trails through residential areas south of CSAH 96. With trail systems leading to the location from the south, east, and west; and existing and future destination north of CSAH 96; this location would likely be used and be attractive to various user types. DESIGNING FOR A BETTER TOMORROW