Lake George Dam and Rum River Erosion
$539,000 the second year is to the commissioner of
natural resources for an agreement with Anoka
County to enhance aquatic habitat in and adjacent
to Lake George in Anoka County and to restore and
enhance aquatic habitat on the Rum River. A list
of proposed habitat enhancements and restorations
must be provided as part of the required
Protected habitats will hold wetlands and shallow lakes open to public recreation and hunting - Measurements are made as to acres of wetland habitat hydrology maintained (150 acres) and Lake George littoral zone preserved (88 acres) for the dam replacement and a decrease in sediment loss of 285 tons per year for the river bank stabilization component..
County Operating Budget, County Equipment / Operating Budget
This proposal will address two separate problems: the eminent failure of the Lake George dam and two severe erosion sites on the Rum River at Rum River Central Regional Park. We propose to replace the current failing sheet pile dam with a new dam that allows for fish passage on the outlet of Lake George. We also propose to repair two river bank erosion sites rated as 'Severe' totaling approximately 625 feet on the Rum River which will reduce sediment loading into the river by 285 tons per year and will provide improved in stream fish habitat.
The existing sheet pile dam will be removed and a new dam, with fish passage capabilities, will be installed. Upon completion of the dam, the disturbed area will be seeded and native tree and shrub species will be planted. This project will maintain the present dam elevation which supports and preserves 495 acres of lake habitat, 150 acres of wetland habitat. This repair will also provide fish passage habitat. The habitat supported by this project provides fish spawning and nursery areas, waterfowl nesting, brood rearing and migration along with nesting and wintering cover for upland game birds. The two Rum River erosion sites will require excavation to establish a more favorable slope. The toe of the slope will be structurally reinforced to prevent further degradation of the slope and loss of soil into the river. The resulting decrease in soil loss will improve spawning habitat in the stream through reduced sedimentation and will improve water clarity and help to moderate water temperatures and improve summer dissolved oxygen levels. The reinforcement will end at the normal high water mark, above which native grasses, forbs trees and shrubs will be planted.