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STORMWATER MANAGEMENT <br />Frederickshaven Second Addition <br />City of Little Canada, Minnesota <br />July 16, 1993 <br />PREVIOUS REPORT <br />This report is an Addendum to the Stormwater Management Report <br />for Frederickshaven Addition, November 1990 (with revised flow <br />calculations, Table 2, June 6, 1991); by Dennis E. Brown, P.E. <br />DRAINAGE PLAN CHANGES <br />To eliminate fill in wetland GL -9 (MnDNR, 62 -154W) the cul -de -sac <br />has been shortened. <br />The existing 12" CMP overflow for the low area along the west <br />plat line has been field located. This pipe is presently <br />flowing, and discharges into a swale to the pond northwest of the <br />proposed new road at Edgerton. This west lowland and Pond are <br />both in Wetland GL -16 (MnDNR 62- 153W). The proposed 12" RCP <br />overflow and 24" RCP storm sewer outlet have been moved to the <br />location of the existing drain. When the new storm sewers are <br />constructed, the existing 12" CMP overflows from GL -9 and from <br />the west area of GL -16 will be abandoned, including removal where <br />possible and plugging other parts. <br />DRAINAGE FLOW CALCULATIONS <br />Included in this report is a Table which revises Table 2 in the <br />previous Report and the June revision, as described above. With <br />this Table is a reduction of the Grading & Drainage Plan showing <br />proposed facilities and drainage areas. <br />I hereby certify that this report was prepared by me or under my <br />direct supervision, and that I am a duly Registered Professional <br />Engineer under the laws of the State of Minnesota. <br />7— /6 -93 <br />Date Dennis E. Brown, P.E. <br />MN Reg. No. 7442 <br />Page 58 <br />