Watershed at a Glance
Only a very small portion of the 1,352,428-acre Upper Big Sioux River watershed is located in Lincoln County in western Minnesota. The vast majority is located in eastern South Dakota.
|Hydrologic Unit Code:||10170202|
|Intensive monitoring start year:||2011|
|Major lakes||Major rivers and streams|
There are no lakes in the Minnesota portion of this watershed.
Land use in this watershed is primarily agriculture, with row crops and livestock grazing.
What's being done
Starting in 2011, the Upper Big Sioux River watershed, along with three adjacent major watersheds located in the Missouri River Basin, will be starting the MPCA’s Major Watershed Restoration and Protection Project (MWRPP) process. Data collection, assessment, and implementation will occur over 10 years.
Each project begins with intensive monitoring where biological data is collected along with physical and chemical data of streams and lakes in selected watersheds. There are 138 proposed stream sites to be sampled for biological data, 23 stream sites for water quality and one site for fish tissue.
Monitoring and assessment reports and data
- Upper Big Sioux River Watershed Biotic Stressor Identification Report
- Summary - Missouri River Basin watersheds Stressor Identification Report (wq-ws5-10170202c)
- Missouri River Basin Watersheds Monitoring and Assessment Summary
- Missouri River Basin (Upper Big Sioux, Lower Big Sioux, Little Sioux, and Rock River Watersheds) Monitoring and Assessment Report
- Missouri River Basin Hydrology, Connectivity, and Geomorphology Assessment Report
Water quality model supporting documents
- Missouri River Basin TMDL Report (wq-iw7-44e) (EPA approval 2/15/2018)
- Appendices for Missouri River Basin TMDL report (wq-iw7-44h)
- Missouri River Basin TMDL: EPA approval letter (wq-iw7-44g)
- Missouri River Basin WRAPS Report (wq-ws4-40a) (MPCA approval 1/18/2018)
- Summary - Missouri River Basin WRAPS Report (wq-ws4-40b)