Wisconsin Department of Natural Resources

Wisconsin River Restoration Viewer Theme

Description: The Wisconsin River Total Maximum Daily Load (TMDL) theme provides information related to the comprehensive study of nuisance-level nutrients in the Wisconsin River Basin. The study will culminate in the development of a plan to improve the water quality of the river, its impoundments, and tributaries. The TMDL is a process for allocating the responsibility of reducing pollutants to all sources upstream of impaired water (e.g., higher phosphorus concentration than the set limit). The Wisconsin River TMDL study area spans Wisconsin’s central corridor from its upper reaches in Vilas County to Lake Wisconsin in Columbia County. The watershed for this study area covers 9,156 mi2 – approximately 15 percent of Wisconsin. To learn more about the Wisconsin River TMDL, visit http://dnr.wi.gov/topic/tmdls/

What information is in the Wisconsin River TMDL Theme?

Wisconsin River Basin

This layer represents the TMDL study area from the headwaters of the Wisconsin River to Lake Wisconsin in Sauk County.

Wisconsin River Major Tributary Drainages

This layer represents the major watersheds draining to the Wisconsin River corridor. These drainages conform to the Hydrologic Unit Code (HUC) pre-defined basin boundaries.

Municipal and Industrial Surface Water Outfalls

The Wisconsin DNR Pollutant Load Ration Estimation Tool (PRESTO), Version 1.1 phosphorus loads from municipal and industrial surface water outfalls that are geolocated and contain phosphorus monitoring data (PRESTO Homepage). While this layer provides the majority of point sources in the basin, this layer does not reflect the official set of point sources used in the TMDL. The updated TMDL dataset will be added to the viewer upon completion in 2014.

Monitoring Site

This layer represents sites were mean daily discharge was collected. These sites were maintained by either the USGS or a private dam operator.

TMDL Water Quality Monitoring Site

This layer represents that water quality monitoring sites from which water chemistry data was collected during the projects monitoring phase (2009 – 2013). Additional water chemistry sample sites may be added as the water chemistry data is reviewed.

Credits: WDNR, Water Evaluation Section
Updated by: Aaron Ruesch, February, 2014