09-22-2004 Council Agenda - Laserfiche WebLink

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tL TRIHG .fSS0GI41TCS September 16, 2004 File No. 120009E Honorable Mayor and City Council City of Little Canada 515 Little Canada Road E. Little Canada, MN 55117 -1633 RE: GERVAIS HILLS DEVELOPMENT CITY OF LITTLE CANADA Dear Council Members: 1JC hQE As requested we have reviewed the submittal package for the proposed Gervais Hills Development located south of County Road B2. The submittal package included a site plan, grading plan, and utility plan completed by Stevens Engineers and dated 9/1/04. Based upon our review we would offer the following comments. Grading Plan 1. Based on the current issue of the Minnesota Department of Transportation Seeding Manual for the Metro Area the restoration items should be revised as follows. The seed mixture for restoration of all areas except the pond should be Type 270 and applied at a rate of 120 pounds per acre. The pond area should be restored with seed Type 310 to the normal water level, applied at a rate of 82 pounds per acre, and Type 350 above the normal water level, applied at a rate of 84.5 pounds per acre. The fertilizer for the pond seed should be Type 18 -1 -8, applied at a rate of 120 pounds per acre. The seeding recommendations for the pond areas should be reviewed and approved by the Watershed. 2. It appears that some of the retaining wall heights are over four -feet. Walls over four feet will need to be designed by a license engineer and submitted for review. 3. No permanent storage area for ponds should be within the street right -of -way. All area from the high water level to the bottom of the pond should be outside of the street right - of -way, but still contained within the drainage and utility easements. 4. The normal water level, high water level, and emergency overflow swales should be labeled at all ponding locations. 5. There should be a minimum of one foot from the high water level in the ponds to the emergency overflow swale. 6. The maximum slope off of the roadway should be 4:1. Contours should be revised to reflect this requirement off of County Road 82. 7. The Developer will be required to raise the manhole rim located south of County Road B2 and east of the proposed street to match the proposed grades Ltr- 091604- council