Trout Streams Gaps Analysis and Management Plan

Trout waters are valuable surface water resources that are particularly sensitive to temperature changes and pollutant loading. The Lower Minnesota River Watershed District (LMRWD) is home to five state-designated trout streams, two trout lakes, and several additional undesignated streams that are thought to have sustained past trout populations. Urban development changes the natural hydrology of the area and can affect these valuable resources. To assess potential impacts to trout waters and develop management strategies, the current condition of the LMRWD’s trout waters must be determined.

In 2019, the LMRWD completed a geomorphic assessment of all trout waters to assess their health. The Trout Streams Gaps Analysis and Management Plan was then developed to examine the viability of trout streams in the LMRWD using historical data, area development, and disturbances. The trout streams in this study were evaluated based on a range of parameters suitable for both brook and brown trout and a high-level summary was created for each of the streams reviewed. From this examination, data gaps were identified, and management recommendations provided.

All of the streams presented in this plan have had their hydrology changed as a result of area development. These changes have a direct impact on their potential to support trout populations. Eagle Creek and Ike’s creek currently support trout populations and are recommended for management as trout resources. The five remaining studied streams (Black Dog Creek, Kennaley Creek, Unnamed #1/Harnack Creek, Unnamed #4/Naas Creek, and Assumption Creek) are not recommended for management as trout resources as they do not currently support trout population and/or are unlikely to be restored for trout sustainability.

Trout Streams Gaps Analysis and Management Plan

Assumption Creek Hydrologic and Hydraulic Study