Granite rock outcrops along the Upper Minnesota River are among the oldest exposed rock in North America, dating back approximately 3.6 billion years. These outcrops are also home to rare and specialized plant and animal communities rarely found elsewhere in Minnesota, including several types of cactus and one of Minnesota's only three lizard species, the five-lined skink. However, these rock outcrops are increasingly threatened by mining, overgrazing, and development.
Del Clark Lake is a regionally unique resource in the Lac qui Parle Watershed. This grant contains both restoration and protection strategies aiming to maintain the quality of this rare and valuable resource in addition to restoring the recently impaired Canby Creek, which feeds into Del Clark Lake. Three grade control structures will be implemented just upstream of Del Clark to protect against sediment and aid in regulating flows. An estimate 240 pounds of phosphorous and 2,700 tons of sediment will be reduced annually.
This grant application will focus on the construction of multiple targeted best management practices (BMPs) in priority areas which will provide measurable reductions in sediment and phosphorus loadings to cold water streams in the Mississippi River/Lake Pepin Watershed. The installation of these BMPs will also protect the existing stream habitat by reducing peak flows and reduced streambank erosion.
