Agenda - Council - 03/22/1994 - Laserfiche WebLink

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February 25, 1994 12967 Crooked Lake Lane Coon Rapid~, M]~ 55448 ? To: City of Ramsey From: ~. C. Dubats Subject: dritical River Overlay District Variance to 30% Non- ~mpervious Lot Development Standard; Lot 3 Block 3, Riverdale West. Applicant ~eeks Site Plan and Variance(s) to expand an existing self-storage facility onto property which may be within the Critical R~ver Overlay District. The City of Ramsey has advised applicant ~hat it has, following a State of Minnesota mandate, esuabllshe~ regulations governing the development of Critical River lands~. The development standard in question sets forth a maximum of 130% of land area to be paved or covered with buildings. ~ The following facts and information bear relate to a variance Z~°m the 30% standard Subject lan~ is served by a municipal storm sewer system in Ebony St. N.W. which also drains Riverdale Drive, Felspar St. Dolomite S%. and i37~h Ave. N.W. The s~orm sewer drains %o a catch basin beneath thei intersection of !3?th Ave. and Ebony St., and then into the MiSsissippi River. This storm sewer system was cons~ructed~in ~976, and upgraded to better serve Riverdale Dr. in ~988 ~h~ io% has been zoned for business use since :976 The drainac~ plan for the initial se!f-storage facility was essenuiali~all inLo the storm sewer syssem. This plan was directed an~ approved by the Ramsey City Engineer. For the prooosed expansion, aop!icant has _evmse~ drainage plan such that approximately 5,000 sq. ~=%. of ~he 50,000 sq. ~.f+ lo~ will be no~-impervi~us areas. In addition, 18,000 sq. ft. of developed area wilt d~ain.into permeable on-site water retention areas. ~n_s drainage Dian reduces the sto~-m wa%er load by 45% The remainin~ cSalnage would impact %he storm sewer system with an increase estimated at 3% to ~%, based on the increase in the exisnlng oa~ed and developed areas. The nature ~nd amount of pollution runoff can be estimated based on the number of vehicle trips (traffic'.count). The existing self-suorag~ facility is equipped with a computer operated gate security system, whereby all visitors enter an identification code numberIinto a keypad both to enter and exit the facility. This orovides a permanent record of all'visits, including time(s) and d~ratio~. An analysis of computer controlled gate records RAMSEY CRITICAL RIVER VARIANCE P, 1 OF 2.