Trimble River and Isabelle Creek (LC23) Watershed Planning


Watershed plan update 2011. The Trimbelle River and Isabelle Creek Watershed drains 221 square miles in Pierce County. The character of this watershed has changed dramatically from pre-settlement times to the present. Forested acreage was dramatically reduced from 96% to less than one-quarter of the watershed area. As in the Rush River Watershed, increased runoff rates have led to reduced infiltration of precipitation and thus decreased stream habitat and increased water temperatures. Historic forest cover contributed to greater rates of infiltration, allowing greater spring flow to streams. This watershed contains almost 63 miles of trout streams, some of which are either threatened or could be improved. There are no lakes in this watershed, except for backwaters found along the Mississippi River.

Study Design

Watershed specified for planning and assessment purposes. Assessment of water quality condition in this respective county will use protocols described in WisCALM of the year of assessment. Minimum assessment work includes biological data (macroinvertebrates, fish indices), chemistry and habitat data. Additional work includes identification of priorities and goals, creating recommendations for actions, and updating narratives for watersheds and waterbodies. Assessments are to be double checked by at least one additional biologist.

Related Reports

Run Project Summary Report
View Umbrella-Projects
View Related-Projects

Water Quality Planning
Targeted Watershed Plans
Reports and Documents
Assessments and recommendations for the watershed.
Inset map
Activities & Recommendations
Water Quality Planning
Trimble River and Isabelle Creek (LC23) Watershed Planning