04-12-21-R - Laserfiche WebLink

Home Browse Search

Feasibility Report Page 15 Snelling Avenue North and County Road E - Street and Utility Improvements City Project Number PW 20-0100 structure at the low point of the road and the culvert extending into the drainage ditch along Trunk Highway 51. Proposed street improvements for the 100-foot section of Bussard Court include removal of the pavement, reconstruction of the upper two feet of subgrade with granular and aggregate base, replacement of damaged curb and placement of 4-inches of new bituminous pavement. 3.4 Utility Improvements: Area 1 – Snelling Ave N south of County Road E Sanitary Sewer Sanitary sewer along Snelling Avenue is located approximately 30 feet or more to the east and west of the roadway pavement. The segment between Arden Place and Skiles Lane was previously improved with a CIPP liner. Based on the recent condition evaluation summarized in Section 2, the recommended sanitary sewer improvements are limited to replacement of the 8-inch diameter crossing under Snelling Avenue at Skiles Lane east as shown in Appendix D. This segment of sewer was originally constructed with a combination of VCP and CIP pipe materials, which is believed to have been done as an alternative to installing a steel casing pipe within the former State highway. The CIP section of pipe is in a highly deteriorated condition. Water Main Under the Alternative 1 scenario (trail), water main along Snelling Avenue North would be replaced with new ductile iron or PVC pipe due to the significant excavation and disturbance required for construction of the trail and associated storm sewer system. Under the Alternative 2 scenario (no trail), a majority of existing water main south of County Road E is proposed to remain in-place. These segments of water main do not have a history of water main breaks based on City records. Removal and replacement of water main between Lametti Lane and Bussard Court is recommended to improve reliability of the water supply feed from Cummings Lane, particularly for Bussard Court, which is supplied from only one direction. A water main break between Bussard and Cummings Lane would disrupt water service to 19 or more homes. The locations of water main improvements are indicated in Appendix D. Drainage Snelling Avenue south of Arden Place is predominately a rural section roadway with little storm sewer within the project area. Culverts are located under the adjacent streets and driveways connecting to Snelling Avenue. The addition of a pedestrian trail as described in Alternate 1 would require the installation of a significant amount of curb and storm sewer to allow the trail to be located directly adjacent to the road surface and minimize the amount of fill embankment within wetlands and steep slope areas. Rice Creek Watershed District (RCWD) requirements as outlined in Rule C apply to public linear roadway projects. The proposed roadway improvements under Alternate 1, including