Agenda - Council - 03/23/1982 - Laserfiche WebLink

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I I I I I I I I I I I I I I I I I I -5 - To the west. and northwest, the site is well screened by existing vegetation. To the south, the site is adequately buffered by a wetland and Neds Lake. Additional screening should be provided to the north. The county has indicated that the site 'would be suitable for parkland as an end use. While it is not wholly consistent with the planned residential use, it could be an amenity for nearby residential development. Existin~ and Future Development Patterns East Bethel is located well beyond the. Metropolitan Urban Service Area. The city is not expected to receive urban services prior to the year 2000, if ever. The East Bethel Comprehensive Plan forecasts considerable.development in the site vicinity within the decade. The potential for conflict with the proposed landfill site depends to a great extent on the development schedule for the landfill. If implemented in the near future, a landfill would be relatively compatible with existing land uses and could be approaching closure by the time the core area was fully developed. On the other hand, the landfill would be a highly intrusive land use if its implementation were delayed until after development had occurred in the surrounding area. Environmental Impacts The proposed site is located within the Anoka sandplain,.a.series of glacial outwash plains. Well logs from the area show a 30- to 60-foot surface mantle of sand underlain by glacial till. The till layer varies between 40 and 80 feet in thickness and consists of mixed layers of sand and clay. The under- lying bedrock is the Franconia formation. Figure 3 shows a geological cross section for the area. The deep drift and Franconia formation is the primary water supply aquifer for the surrounding area. There may be use of the surficial aquifer by older homes in East Bethel; however, there is no known use of the surficial aquifer down- gradient of the site. Local well codes prohibit construction of new wells in this aquifer. Figure 4 shows the groundwater contours of the surficial~aquifer. Groundwater below the eastern half of the site flows toward a Type III wetland ~nd Neds Lake; below the remainder of the site, groundwater flows to the southwest, discharging to Cedar Creek, a mile west of the site. Groundwater was found beneath the site at depths ranging from 4.5 to 8 feet. MPCA's review of the site noted that the sandy soil "allows very rapid perco- lation to the water table and provides little if any leachate attenuation."* Also, those soils do not satisfy Council criteria for soil type suitable for landfills. In recognition of the limiting hydrologic characteristics of the Anoka sandplain, Anoka County's adopted policy is to require both a l~ner and leachate collection system for new landfills. MPOA certification of the site also specified the need for liner and leachate collection. * MPCA, Report on the Director's Proposed Recommendations~ 1981, p. 18.