07-28-1999 Council Agenda - Laserfiche WebLink

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Howard R. Green Company CONSULTING ENGINEERS Memorandum CCNIIINGENC11913 Formerly MSA Consulting Engineers To: Mr. Terry J. Maurer, P.E., Howard R. Green Company From: Mr. David E. Nyberg, P.E., Howard R. Green Company_bN Subject: MAPLE LEAF COURT DRAINAGE ISSUE CANADA WOODS WEST DEVELOPMENT File: 804490J -0325 Date: October 13, 1998 As requested by the City of Little Canada at the meeting an September 30, 1998, we have completed additional review of several options and alternatives that were discussed at the meeting. Introduction The three options discussed at the meeting that we further reviewed include the following: • Riprap /Enkamat Swale — this option includes grading a swale from the convergence of the culverts under County Road D and Maple Leaf Court to the area along the back property lines of the homes along the east side of Maple Leaf Court. The swale would be lined with Enkamat upstream and Riprap downstream, depending on the flow velocities and extent of existing erosion. • Storm Sewer along Maple Leaf Court — this option includes the construction of a storm sewer pipe along the east boulevard of Maple Leaf Court which would convey the water from the convergence of the culverts under County Road D and Maple Leaf Court to the existing catchbasin at the south end of Maple Leaf Court. Also, as part of this option, the existing pipe from the catchbasin in the cul-de -sac would be replaced with one of larger capacity to handle the increased flow to the pond. • Storm Water Pond along Washout — this option includes grading a stormwater pond along the existing washout to collect and detain the stormwater and slowly release it into the existing pond at the south end of Maple Leaf Court. O: \PROJ1804490j103251490- 1304.oct doc PAGE 127 1326 Energy Park Drive • St. Paul, MN 55108 • 612/6444389 fax 612/644 -9446 toll free 888/368 -4389