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owarc R. Green Co <br />December 12, 2001 <br />File: 816490J -0240 <br />Honorable Chairman and Planning Commission <br />City of Little Canada <br />515 Little Canada Road East <br />Little Canada, MN 55117 -1633 <br />RE: LITTLE CANADA OFFICE PARK <br />Dear Planning Commission Members: <br />oany <br />As requested, we have reviewed the submittal package for the proposed Little Canada Office <br />Park located west of Park Avenue. The submittal documents were prepared by Cundy Santine <br />& Associates Architects and Piowe Engineering, Inc. Based upon our review we would offer the <br />following comments. <br />A. GRADING AND DRAINAGE <br />1. The site is over 1 acre and therefore the grading and drainage plan must be <br />reviewed and approved by the Ramsey Washington Watershed. <br />2. The pond should be redesigned using best water management practices. <br />Changes needed include the use of 4:1 side slopes and a 10 -foot bench at <br />normal water level. No storm sewer calculations have been received for review <br />at this time. Both preexisting and post development calculations should be <br />submitted and approved prior to any construction. Although it appears that the <br />950 contour encompasses the entire pond, spot elevations should be shown on <br />the north side of the pond to verify that no storm water will pond on the adjacent <br />property. <br />3. The high water level (HWL) of the storm pond is listed at 949.57. All buildings <br />should have a lowest floor elevation of at least 950.57, or 1 -foot higher than the <br />HWL of the pond. <br />4. The 100 -year flood elevation of the wetland to the west of the proposed buildings <br />is listed as 948.1. However there is no indication of an overflow for the wetland. <br />If the wetland is land locked the water elevation must be determined for a 10 -day <br />snowmeit and back -to -back 100 -yr rainfall events to ensure against flooding in <br />both cases. \Nater levels for the wetland north of the existing building should be <br />shown, and the same procedure followed as described above. <br />O: \PROJ \816490) \Ltr 12 -12 -01 P!ngCom.doc <br />' 323 9nercy ?ark Drive • St. 'aui.`,1N <br />Page 51 <br />,o = -9446 :oi! -r99 388/368 - -C39 <br />