12-13-1999 Council Packet - Laserfiche WebLink

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Access The City Engineer has commented (Exhibit E) the proposed access to the property be platted as part of the subdivision and not by easement. Further, he recommends that the access to the site should meet a minimum 50' width to meet City roadway standards tor a public or private street. The grades are a concern regtirding driveway access to several lots on the property. It appears that existing grades exceed 40% on Lots 2, 3 and 7. Driveway design on these Lots will be critical as the City recommends that driveway grades not exceed 10%. Access to Lot 7 across Outlot B will require the construction of a bridge or culverts at the stream crossing. The plans should provide a design for this crossing. Outlot B would be a shared driveway in favor of Lots 6 and 7. The drive would be required to cross Long Lake Creek which is a protected tributary stream and subject to Orono ’s Shoreland Management regulations. A variance would be required to allow a driveway to cross the creek. Driveway locations and proposed grading shall be shown on the survey. Drainage and Ponding The draft version of the City's Comprehensive Stormw'ater Management Plan shows that the site lies within the Tanager Lake drainage district. The ponding location is shown on the preliminary survey. Final grading plans should include final pond grading including a 10:1 aquatic bench 10-feet wide at the pond normal water level. The outlet structures shall be provided on the final plans indicating the location and actual size of the pond. The City Engineer will require Best Management Practices in all areas where stormwater can not be treated by the NURP pond. A drainage area map, storm sewer and ponding calculations should be provided for review by the City Engineer prior to further review. Sanitary* Sewer A MUSA amendment is required to allow sanitary sewer service to the property. Sewer service has been discussed and a feasibility report has been completed for the Fox Ridge neighborhood south of the Luce Line Trail. The report identified a pressure sewer system as the most feasible to serv e the neighborhood. The pressure sewer would be routed up South Brown Road to an existing gravity sewer on Watertown Road. This system would have the potential to serve properties north of Fox Ridge ;md south of Watertow n Road needing sanitary sewer. The Van Eeckhout plans include a preliminary design for sanitary sewer to serve the site. The plans show a gravity sewer system that ties into an existing sanitary manhole at the south end of Apple Glen Road in Long Lake. This proposed system could potentially serv e the Fox Ridge neighborhood if the DNR issued permits for to cross the Luce Line Trail. The proposed alignment as shown would not provide sewer service to properties along South Brown Road. The topography would allow a gravity sewer to be extended westerly in the proposed roadway to South Brown Road to provide future sanitary serv ice. In discussions with the DNR on December 6, 1999 it is clear the DNR would issue a permit for the sewer crossing along Brown Road not as proposed in this plan. The purpose of extending sewer service from Long Lake through the Van Eeckhout property is to prov ide sewer to the Fox Ridge neighborhood. It is unlikely the DNR will issue pemiits for crossing the Luce Line Trail as proposed because a better alternative is available to cross under the trail below the Brown Road bridge.