4.7. SR 09-15-2014 - Laserfiche WebLink

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INTRODUCTION The proposed Yale Street connection has been studied thru previous planning efforts and the 171St AUAR which was completed in 2011. The goal of this report is to identify the improvements,prepare construction cost estimates and identify right-of-way impacts. Public Improvements include the following: • Bituminous Street • Concrete Curb and Gutter • Concrete Sidewalk • Watermain • Sanitary Sewer • Storm Sewer • Ponding • Turf Restoration • Striping and Signage SANITARY SEWER The existing sanitary sewer is located within a utility easement on the Greater Minnesota Credit Union Property. As per the City's 171St Avenue Area AUAR,a I0-inch diameter polyvinyl chloride pipe (PVC) will be extended south to the proposed future Trunk Highway(TH) 169 intersection. See Figure 1 in Appendix A for the proposed layout. Sewer depths range from 10-22 feet deep. 6-inch sanitary sewer services are proposed for nine (9)existing businesses and three (3)future businesses on the southerly portion of the project. WATERMAIN The existing watermain is located in the TH 169 westerly ditch between the Greater Minnesota Credit Union and Super America. The existing water is a 16-inch diameter pipe. As per the City's 171St Avenue Area AUAR, a 16-inch diameter ductile iron pipe (DIP)will be extended south to the future TH 169 intersection. See Figure I in Appendix A for the proposed layout. 2-inch diameter watermain services are proposed for the nine(9)existing businesses and three(3) future businesses on the southerly portion of the project. In addition to the mainline improvements along Yale Street. Per the City's 171St Avenue Area AUAR, an 8-inch watermain will be extended beneath TH 169 for looping purposes. STORM SEWER AND PONDING The existing storm sewer for the Yale Street area consists of a pond located on the First Storage of Elk River,LLC property and a pond located northwest of the Yale Court cul-de-sac. These ponds outlet to the Mississippi River. The proposed improvements consist of a storm sewer conveyance system with pipes ranging from 12-18 inch diameter pipes. Ponds are proposed on the southerly portion of the improvements,on the Appletime Child Care property and the expansion of an existing pond located northwest of the Yale Court cul-de-sac. The pond expansion will include the need for additional property from the lot owned by Elk River Ford,Inc. Figure 2 in Appendix A identity the improvements. City of Elk River INTRODUCTION Yale Street/Street and Utility Improvements Page 4