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AD'IN 1000 (Rev. 1~8) Environmental Planning/ DEPARTMENT Critical Areas TO : Lloyd Schnelle, City Administrator FROM : Arthur S idner, Chairman g~'~/,,~'~"- Minnesota Environmental Quality Board PHONE: 296-2686 SUBJECT: Mississippi River Critical Area Rev. iew of the Pmoposed Alpaca Estates Subdivision in the City of Ramsey The Environmental Quality Board (EQB) has received the proposal for Alpaca Estates subdivision in the City of Ramsey and the EQB staff has reviewed it for conformance with the Interim Development Regulations for the Mississippi River Corridor Critical Area. Our review indicates that only a portion of the project is within the Critical Area and subject to the Critical Area. Interim Development Regulations. The two rows of proposed residential lots-adjoining and paralleling the river are within the Critical Area. The proposed project is within the Rural Open Space District. The minimum lot size in this district is 5 acres per single family unit in uns~wered areas. The proposed residential lots are located in an unsewered area and all would be approximately 2.5 acres in size. The Mississippi River floodplain study, indicates that portions of the residential lots along the river would be inundated by the lO0-year flood levels. The data indicates that some houses and on-site sanitary systems along the river might be subject to flooding depending on their specified locations. The Interim Regulations prohibit the placement of on-site disposal systems in the floodplain and require a setback of 75 feet from the normal high water mark. The plan is inconsistent with this requirement and does not recognize the potential problem of flooding or indicate solu- tions to this hazard. The project plans do not indicate whether the develop- ment will meet local or statewide floodplain regulations or the require- ments for on-site sanitary systems. Also¥ the project plans do not indicate how Critical Area requirements for grading and filling to minimize erosion and water pollution will be met. Ba'sed on the information provided by the City the EQB concludes that the proposed devel.opment is inconsistent with the Critical Area Interim Development Regulations in the following ways: 1. The proposed lot sizes are inconsistent with the five-acre minimum lot size for unsewered areas.