Watershed Management Organization
The US EPA and the Minnesota Pollution Control Agency have selected Scott County and the Scott Watershed Management Organization for a Clean Water Act Section 319 Nonpoint Pollution control grant. The Scott WMO applied for grant funding to implement Total Maximum Daily Load (TMDL) Implementation Plans that have been completed for water bodies in the Scott WMO. Water bodies with completed TMDLs include Cedar and McMahon Lakes, and the Minnesota River. Sand, Raven and Porter Creeks (which are tributaries to the Minnesota River) will also benefit. The grant amount is $298,000 to be used over four years. Practices to be promoted include filter strips, native vegetation plantings, grade controls, alternative tile intakes, grassed waterways, terraces, water and sediment basins, wet detention ponds, and wetland restoration. Partners in the project include: Le Sueur, Rice and Scott Soil and Water Conservation Districts. July 2013.
June 17, 2013
Cedar Lake Fish Kill
We’ve received several reports of dead crappies on Cedar Lake recently. The DNR have been notified and believe the fish kill was from a combination of sources. Every few years Cedar Lake and a few other lakes experience a crappie kill. The abundance of 8-9 inch crappies is very high in Cedar Lake. The number of dead crappies observed is a very low portion of the population in the lake.
Crappies are vulnerable to bacterial infection when water temperature is rising in May and June. In addition, the treatment for curlyleaf pondweed on June 4th which caused a die-off of the plant could have caused a low dissolved oxygen environment in those areas of the lake that were treated. Other sport fish besides crappie would have been observed if low oxygen was the only factor. A moderate black crappie die-off was reported on 6/10/08. The timing, species seen, and mortality pattern seemed consistent with a natural columnaris bacterial kill (or similar natural bacterial-caused kill). This die-off made seemingly no dent in a dense crappie population.
Very high crappie abundance coupled with some bacterial infection (Columnaris Disease) and possible additional stress from possible low oxygen are the most likely causes. Here is a link to the information on Columnaris Disease:
WMO wins grant for installing protection measures on the Credit River.
The Minnesota Pollution Control Agency targeted their Clean Water Partnership grants in 2013 to providing additional protection to water bodies that were meeting state standards, rather than restoring impaired waters. The Scott WMO applied for some of the grant funding for the Credit River even though the river was recently removed from the impaired waters list. The hope is that efforts enabled by this funding would provide additional resilience and protection in the watershed and help keep the river from degrading back to the point where it again is listed as impaired. The grant amount is $225,000 to be used over three years to fund items in the Credit River Protection Plan. Practices to be promoted include rain gardens, filter strips, native grass planting, stormwater reuse for irrigation, and riparian vegetation and stream-side improvements.
Credit River improvements recognized by the EPA!
Watershed Management efforts helped reduce sediment loading in Credit River. As a result, the state of Minnesota removed Credit River from its list of impaired waters in 2012. To read the the EPA nonpoint source program success story, click here.
Minnesota Conservation Guide
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