Minnesota's Impaired Waters and TMDLs
TMDL Project: Long Prairie River Watershed - Low Dissolved Oxygen
Background
Low dissolved oxygen (DO) due to high levels of ammonia impair water quality in the Long Prairie River. Low dissolved oxygen occurs primarily during low-flow conditions, when the volume and current of the water in the river are less than average. The MPCA hired a consultant to complete a modeling study of the Long Prairie River. Results from the TMDL study indicate that, with ammonia reductions, it is possible to meet the dissolved oxygen standard in the Long Prairie River during low flow conditions. The TMDL report was approved by the EPA on August 5, 2005. The Todd County Soil and Water Conservation District (SWCD) is now developing the implementation plan.
Map and location
The Long Prairie River flows approximately 100 miles from its headwaters at Lake Carlos to its outfall near Motley into the Crow Wing River, and eventually, to the Upper Mississippi River.
TMDL report and implementation plan
Fact Sheet- Final Project Report (file size = 2.3 MB) (approved by the EPA on August 5, 2005)
- Appendicies (file size = 8.3 MB)
- Figures (file size = 3 MB)
- Tables
- EPA Approval Letter (August 5, 2005)
- Implementation Plan (2006)
Other documents
None.
Meetings and events
See the TMDL Meetings, Events and News page for notices of general interest and event-related information on impaired waters/TMDLs.
Links
Information contact
Jim Hodgson, Basin Coordinator
7678 College Road Suite 105
Baxter, MN 56425
218-828-6065
jim.hodgson@state.mn.us