02-12-09 Planning Comm. Agenda - Laserfiche WebLink

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Planning Commission February 4, 2009 Page Two 5. The maximum driveway grade allowed by City code is 6% and nearly all driveways exceed this requirement. Due to the existing topography we would recommend that the City allow the maximum driveway grade for this development be 10%. 6. No driveways should be constructed closer than 5 feet from a property line. 7. The ponding area on the north end of the development is proposed to pipe discharge to the north. This concentrated discharge could create an erosion problem on the bank into the park to the north. The discharge rate and overall discharge volume will need to be looked at in more detail and permanent erosion control measures installed as part of the final plans. 8. There is sufficient grading to require the treatment of storm water runoff from the site to the City standard and the developer should provide a disturbed area determination on the grading plan. Based on the disturbed area the Ramsey Washington Metro Watershed requirements and permit along with a NPDES permit apply. 9. Amore detailed grading plan of the ponds will be necessary on the final plans after drainage calculations have been completed. Utility Plan 1. The sanitary sewer line to the north of the development that is being used for sanitary sewer extension is currently owned and operated by the Metropolitan Council. The specific details on the connection and a permit for the connection will need to be coordinated with their representatives, however it is our recommendation that a new manhole structure be added over the existing line to allow adequate maintenance of the new line by City crews. The location of the connection to this line may need to be moved to ensure access to the manhole with maintenance equipment. 2. The maximum grade allowed on an 8" gravity sanitary sewer line is 8.29%. This is the maximum grade that will be allowed especially due to the very low flows in this line. Inside drops conforming to the City details can be utilized to minimize excess depths. 3. The watermain service location for Lot 4 should be moved to eliminate the disturbance to the existing driveway on Edgerton Street. 4. Any work within the Edgerton Street right-of-way will need to be permitted through Ramsey County. If the bituminous surface is disturbed full lane replacement will be required. 5. All curb stop locations must installed in an area accessible by City Public Works staff and be within drainage and utility easement or street right-of-way. 6. A drainage and utility easement will be required over the 8" sanitary sewer mainline. This easement should be a minimum of 3 times as wide as the pipe is deep centered over the pipe. 7. An access must be provided to manhole #3 that would be accessible by the City sewer cleaning truck. Based on the driveway configuration shown and the location of the manhole the access will be easiest to provide off of the driveway to Lot 3. A drainage and utility easement or an access easement Llr-020409-PC 10062 Flanders Court NE, Blaine, MN 55449 -Phone: (763) 780-0450 -Fax: (763) 780-0452