04-12-1989 Council Agenda - Laserfiche WebLink

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mit RAMSEY COUNTY Ramsey County DEPARTMENT OF PUBLIC WORKS 3377 North Rice Street Saint Paul, Minnesota 55126 (612) 484.9104 RECENE_ MAR 29_1989 ■ City of Little Canada Michael Fahey, Mayor City of Little Canada 515 East Little Canada Road Little Canada, Minnesota 55126 March 23, 1989 Divisions of: Engineering Maintenance Mobile Equipment Environmental Services Re: Drainage Problem 653 East County Road B -2 As you know, there have been recurring drainage problems near the low point of County Road B -2 near the Eng residence. Periodic ponding in adjacent ditches and contiguous low areas has been noted as far back as the mid 1970's. Much of the area and adjacent property is within the flood plain of Lake Gervais and is impacted by elevated lake levels as well as surface runoff. Our records support the fact that drainage from the road itself has always been acceptable, while conveyance to and from abutting properties has been and remains poor. Recent complaints from the Eng's concentrate on standing water in the ditch and lower ground within their front yard, particularly since the recent restoration of County B -2 following installation of the Metropolitan Waste Control Commission Beltline Interceptor. Assembling information relating to construction supports the contention that no material change to the road section relating to drainage control occurred, with the exception of installing a curb line along the north side of County Road B -2, easterly of the Eng home. The latter did inadvertantly convey additional flow to the ditch area in front of their home, rather than discharging to the ditch section to the east. Our Maintenance Division cut curb openings last fall to mitigate this problem. The only other drainage impact due to the road restoration was replacement of one larger culvert with three smaller ones in the low point of of the road to improve cover over the pipes. The invert control and capacity were not materially changed. A number of factors contribute to the problem in front of the Eng home. Existing drainage structures, although adequate for roadway concerns, are marginal in ability to convey discharge to Lake Gervais. Development of homesites, issuance of fill permits, and allowance of other improvements within the flood plain have increased surface flows and reduced available storage capacity. The result is concentration of surface runoff at areas without adequate flowage or storage capacity. These changes in land use are not under the jurisdiction of Ramsey County - rather they are subject to permit through the City. Records in our office suggest much of the development within the Page 25