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new sanitary sewer main will be lowered as much as feasibleto improve flow.Sanitary <br />sewer improvements are shown on Figures 6 through 9. <br />Project Area2 <br />No improvements to the sanitary sewer collection system are proposed. <br />D.WATERMAIN <br />Project Area1 <br />The existing watermain is in adequate conditionand is expected to last for the life <br />expectancy of the proposed street improvements. However, the 4-inch watermainsdo not <br />meet the AWWA standards for domestic water distribution. The Elk River Municipal <br />Utilities (ERMU) is considering replacing all 4-inch watermain with 8-inchwatermain. <br />This wouldmeet current standards and improve flow, pressure, and fire protectionto the <br />businesses and residents within the project area as well as the wastewater treatement plant. <br />The 4 inch watermains exist under2ndStreet west of Evans Avenue,Evans Avenue south <br />of 2ndStreet, and Railroad Drive East of Evans Avenue.In these areas it is also proposed <br />to replace the existing water services to the right-of-way with 1-inch diameter copper pipe <br />and placeacurb stopat the right-of-way. <br />The proposed improvements to the remainderof the system consist of installing mainline <br />valves and hydrant isolation valves where needed.This reduces the number of residents <br />that would be without water during a repair. The existing system has only one or two <br />valves in each intersection. An isolation valveon all hydrantsisrecommended in order to <br />eliminate the need to shut down services while doing regular maintenance on the existing <br />hydrants. Final locations for all required valves will be established during the final design <br />at the direction of ERMU to best serve their needs. <br />Project Area2 <br />No watermain improvements are proposed in the Industrial Park. <br />13R13.103354 <br />April 2011 <br />