03/22/2004 Council Packet - Laserfiche WebLink

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Riparian areas are to be maintained as native vegetation that minimizes erosion and sedimentation of the wetland areas As development occurs in the upland area of the Eagle Brook Church property, establish buffers for the conservation area, which will reduce erosion and sedimentations while providing transitional. habitat. All areas of the conservation easement are to be managed to control the invasion of exotic species. Use of the area is permitted for maintenance and recreation purposes as long as such activities do not interfere with the ecological quality of the site, particularly the stick gathering activities of, the herons and egrets from April to June • Provide educational opportunities for members of Eagle Brook Church and the residents of Lino Lakes that are compatible with sustaining natural community function and integrity of the conservation easement area LANDSCAPE DESCRIPTION AND HISTORY The natural resources of the Eagle Brook Conservation area are a result of historical processes, including climate, hydrology, plant and animal migration and interactions, and more recently human decisions and activities. This section describes the various historical processes and interactions that played a part in the determining the natural composition of this area today. Pre - Settlement History and Major Landscape. Features ,. Glacial landscapes'` e topography of Eagle Brook Conservation Area was formed' by the last period of gladation, which ended about 10,000 years ago. The glaciers carved out the landscape of the area leaving behind large deposits of drift/till and outwash (sand, gravel and silt). The major landform in this area is the St. Croix Moraine Complex that was created by the receding glacial lobes and glacial meltwater, which greatly influenced the major pattern of vegetation of this area The St. Croix Moraine Complex is a broad band of rolling to rugged hills extending from St Paul northward through southeast corner of Anoka County into Washington. County and Wisconsin. The moraine was formed by the Superior Lobe that scoured rock from the Lake Superior basin bringing south deposits of gravel, sand and silt.. The effect of weather and agriculture on this glacial outwash material creates coarse, droughty and relatively infertile soil (VVovdia, et al. 1995) Post- glacial Vegetation After the glaciers melted spruce trees and tundra plants grew up around the glacial margins and buried ice blocks, ?. which melted to become lakes. With climatic changes, the plant communities became more diverse with the appearance of paper birch, aspen, black ash, tamarack, fir and alder. As the temperature: continued to rise and the spruce forests were replaced with pine forests and finally.mesic (wetland) forests and wet prairies dominated the area, which are characteristic of the vegetation found today in the Lino Lakes area... Government Land Office Surveyor Notes .' In 1847, Centeville township was surveyed by the Government Land Office.(GLO). To establish section corners and half section lines crews would mark up to four trees at those points. The species and diameter of each of these trees .• were recorded in the surveyors' notes. The section corner directly south of the Eagle Brook Conservation easement area noted large Basswood trees. (Wovcha, et al. 1995). DRAFT Eagle Brook Conservation Area Management Plan: 3/17/2004 .