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Page 2 kimley-horn.com 2550 University Avenue West, Suite 238N, St. Paul, MN 55114 651 645 4197 · Spine Road between Highway 96 and County Road H · Highway 96 Traffic Signal · Spine Road Bridge over Rice Creek · Water Main · Sanitary Sewer · Storm Sewer · Natural Resources Corridor Ponds, Wetlands, and Trail · Regional Trail between Highway 96 and County Road H · Sidewalk Extension along Highway 96 · Earthwork Balance/Site Grading Spine Road and Public Utilities Final Design Cost:$899,240 Thumb Road and Public Utility Design The Thumb Road and public utility design task will include the preparation of final plans and specifications for the following improvements as identified in the Preliminary Design Report: · Thumb Road between County Road H and County Road I · Storm Sewer · Water Main Extension from County Road H to Approximately 4,600’ South · Interconnect with Mounds View Water System · Water Service Connection to State of Minnesota Facilities Thumb Road and Public Utility Design Cost:$144,540 Water Tower and Booster Station Final Design Final design of the water tower and booster station will require additional water system modeling from that completed with the preliminary design. The City of Arden Hills has expressed interest in adjusting the preliminary water system design parameters in an attempt to reduce the elevated storage requirements. Construction sequencing may leave out portions of the trunk water main system requiring modeling to determine resulting fire flows. We will complete six runs of the water main model to address these issues as follows: · Reduced duration and/or fire flow requirement and impact on required elevated storage while maintaining a minimum 20 PSI residual pressure (continue to assume worst-case low water level in tower at start of fire flow event) · Reduced duration and fire flow requirement and impact on required elevated storage while maintaining a minimum 20 PSI residual pressure (continue to assume worst-case low water level in tower at start of fire flow event) · Reduced duration, reduced fire flow requirement, and adjusted assumption on the water level in tower at start of fire flow event to determine the impact on required elevated storage while maintaining a minimum 20 PSI residual pressure ·One addition iteration similar to the three previous runs ·Based on final tower design assumptions determined above, run analysis of one alternate trunk water main layout to address potential construction sequencing