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b©'d 10101 <br /> Addition will be required to apply for an NPDES permit given the size of the <br /> • development, It is likely that a requirement of that permit may be to have a <br /> sedimentation pond prior to discharging to the wetland. <br /> • There is no erosion protection shown on the grading plan. The grading olan should <br /> be modified to show provisions that will be utilized during the grading and turf <br /> establishment phases of the project to prevent erosion. <br /> C. UTILITIES <br /> • The utility plan does not show looping of the water main in the cul-de-sac areas. <br /> According to Elk River Municipal Utility policy, all cul-de-sac water mains need to be <br /> looped. It appears that it will be relatively easy to loop the cul-de-sac in Phase Four <br /> to the street in Phase One along the storm sewer alignment and to loop the cul-de- <br /> sac in Phase Two with the easterly cul-de-sac in Phase Four, again, along the storm <br /> sewer alignment and through Outlot C where the pond is proposed. The cul-de-sac <br /> in the southeast corner in Phase Three could also be looped along the storm sewer <br /> alignment to 193`0 Avenue. Using the same route as the proposed sters, sewer for <br /> looping will minimize, if not totally eliminate, any tree removal due to water main <br /> looping. <br /> • Each of the sanitary sewer manholes in the cul-de-sacs could be pulled back slightly <br /> and terminated much closer to the center of the cul-de-sac. <br /> • The street design on 193`' Avenue proposes a median down the center of the street. <br /> We have discussed this issue with Phil Hals, Street Superintendent, and he has <br /> indicated a willingness to be responsible for maintenance of these island areas. The <br /> City would not maintain the two island areas in the "eyebrow" cul-de- ;.acs along <br /> 193rd Avenue. The design of these should consider low maintenance type of <br /> construction. <br /> • The developer should be made to escrow monies for the utility extensions ;and street <br /> construction at the east end of 193't Avenue where the temporary ponding area is <br /> proposed. in the future, this pond can be eliminated and the storm sewer -un to the <br /> east ultimately outletting to the ditch system located east of the plat. <br /> If you have any questions regarding any of these issues, please call me. <br /> • <br /> Sincerely, <br /> HOWARD R. GREEN COMPANY <br /> Terry / c���� <br /> -. aurer, P.E. <br /> • <br /> Howard R. Green Company <br /> O.IPROJ./410.0218,FEB CONSULTING ENGINEERS <br /> 173ib0'd 6b2z bb9 TS9 00 N3a19 elH 6E:T T 666T-6T-33d <br />