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Mr. Jim March January 30, 1997 Page Three Utility Plan • Storm drainage is proposed to occur from the ponds into the large wetland areas along Main Street. This wetland area is drained through three culverts under Main Street. These culverts will need to be cleaned in the spring to allow for drainage to flow under Main Street to Centerville Lake. • We recommend an extension of the storm sewer system along the street through the development to the Centerville Road intersection. This would eliminate the need for a valley gutter at this location. • At both entrances to the development off of Main Street, small detention ponds are shown at each storm sewer apron. These ponds need some type of outlet with elevation shown, either a swale or pipe. • Storm sewer is shown crossing the street at each entrance off of Main Street. The depth shown is not adequate to accommodate both the storm sewer and the anticipated street section. • An elevation for the overflow of the pond in Lots 7 and 8, Block 3, needs to be shown. • The Grading Plan should be designed so that the depth of the sanitary sewer is a minimum of 8 feet deep. • We recommend the watertnain be looped at the north part of the project to minimize the lengths of dead -end lines. The City Council is currently considering alternatives, including a watermain extension along Peltier Lake Drive or requiring the developer to cross the creek and connect to the watermain along Clear Ridge. • On the final utility plans, hydrants will be placed so that all homes are covered by an area with a 250 -foot radius. ▪ Gate valves will be placed with a minimum distance between valves of 1,000 feet. • Watermain is shown to be extended from near the hydrant on Westview Street north into the development. Proper easements will need to be obtained prior to final plat approval. 260/063.24144an