Fish and Aquatic Life
Mouth to Barre Mills (class 3); Barre Mills to CTH M (class 2); CTH M to headwaters (class 1)
Author Aquatic Biologist
Bostwick Creek, also known as Irish Coulee Creek, is located in central La Crosse County. This stream flows in a northwesterly direction for approximately 13.6 miles, before reaching the La Crosse River. It has a moderate gradient of 38 feet per mile and drains forested hills and agricultural valley land. Bostwick Creek is a Class III trout stream from its mouth upstream to Barre Mills, then Class II upstream to CTH "M", and finally Class I upstream to its headwaters.
A fishery survey conducted in 1965 suggested that Bostwick Creek should not be classified as a trout stream. However, a 1986 fishery survey confirmed natural reproduction of brown trout. The trout population improvement is credited to a combination of consistent stocking and adequate habitat in the upper portions of the stream that allows for natural reproduction and good winter survival. The lower portion of Bostwick Creek contains limited in-stream cover for adult fish. Fishery and habitat surveys should be conducted on Bostwick Creek to determine the current status of the stream. Additional in-stream habitat development in Bostwick Creek would benefit the trout fishery. Bostwick Creek was last stocked in 2001 with wild brown trout. Access to Bostwick Creek is from WDNR owned easements and seven road crossings.
Water chemistry testing of streams throughout La Crosse County was initiated by the La Crosse County Land Conservation Department in 1998. Baseflow conditions were targeted for testing as the most likely to show normal water quality conditions. Sampling takes place four times argeted for testing as the most likely to show normal water quality conditions annually when no rainfall or snowmelt has occurred during the previous 72 hours. Bostwick Creek is sampled at two different locations: near the mouth and approximately six miles upstream from the mouth. Between 1998 and 2001at the middle sampling location, Bostwick Creek met the county phosphorus goal in just over 40% and the county fecal coliform bacteria goal in nearly 50% of the samples taken. At the lower sampling location, Bostwick Creek never met the county phosphorus goal and met the county fecal coliform bacteria goal in only 33% of the samples taken. These data point to a nutrient load that is likely also contributing to high bacterial counts. Data also indicate significant sources of nutrients along the lower six miles of Bostwick Creek. The county ranks Bostwick Creek in the top 50% of county streams on which to expend effort to reduce phosphorus and bacterial contamination. La Crosse County should continue baseflow sampling of Bostwick Creek to determine water quality trends.
Author Aquatic Biologist
Upstream from Barre Mills (class 3)
Author Surface Water Inventory Of Wisconsin
Bostwick Creek (WBIC 1650900) from Barre Mills to headwaters was assessed during the 2018 listing cycle; new biological (fish Index of Biotic Integrity (IBI) scores) sample data were clearly below 2018 WisCALM listing thresholds for the Fish and Aquatic Life use. This water is meeting this designated use and is not considered impaired.
Author Ashley Beranek
Bostwick Creek (1650900) from the mouth to Barre Mills was placed on the impaired waters list for total phosphorus in 2014. The 2016 assessments showed continued impairment by phosphorus; total phosphorus sample data exceeded 2016 WisCALM listing criteria for the Fish and Aquatic Life use, however, available biological data did not indicate impairment (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the "poor" condition category). Based on the most updated information, no change in existing impaired waters listing is needed.
Author Aaron Larson
Wisconsin has over 84,000 miles of streams, 15,000 lakes and milllions of acres of wetlands. Assessing the condition of this vast amount of water is challenging. The state's water monitoring program uses a media-based, cross-program approach to analyze water condition. An updated monitoring strategy (2015-2020) is now available.
Compliance with Clean Water Act fishable, swimmable standards are located in the Executive Summary of Water Condition in 2016 . See also 'monitoring' and 'projects'.
Wisconsin's Water Quality Standards provide qualitative and quantitative goals for waters that are protective of Fishable, Swimmable conditions [Learn more]. Waters that do not meet water quality standards are considered impaired and restoration actions are planned and carried out until the water is once again fishable and swimmable
Management goals can include creation and implementation of a Total Maximum Daily Load Analysis, habitat restoration work, partnership education and outreach and more. If specific recommendations exist for this water, they will be displayed below.
Monitoring the condition of a river, stream, or lake includes gathering physical, chemical, biological, and habitat data. Comprehensive studies often gather all these parameters in great detail, while lighter assessment events will involve sampling physical, chemical and biological data such as macroinvertebrates. Aquatic macroinvertebrates and fish communities integrate watershed or catchment condition, providing great insight into overall ecosystem health. Chemical and habitat parameters tell researchers more about human induced problems including contaminated runoff, point source dischargers, or habitat issues that foster or limit the potential of aquatic communities to thrive in a given area. Wisconsin's Water Monitoring Strategy was recenty updated.
Grants and Management Projects
|WBIC||Official Waterbody Name||Station ID||Station Name||Earliest Fieldwork Date||Latest Fieldwork Date||View Station||View Data|
|1650900||Bostwick Creek||323019||Bostwick Creek at Cth O||5/13/1998||7/23/2015||Map||Data|
|1650900||Bostwick Creek||323020||Bostwick Creek at Cth B||Map||Data|
|1650900||Bostwick Creek||10009114||Bostwick Creek #2- 320 Meters Downstream From Cty O Bridge||Map||Data|
|1650900||Bostwick Creek||10013911||Bostwick Creek Station 1 - Cth B Bridge||4/29/1980||1/1/2015||Map||Data|
|1650900||Bostwick Creek||323081||Bostwick Creek - Sw1/4ofnw1/4 Sec 17||Map||Data|
|1650900||Bostwick Creek||10009113||Bostwick Creek #1- Bridge On Swamp Rd.||8/21/2013||8/21/2013||Map||Data|
|1650900||Bostwick Creek||10013912||Bostwick Creek Station 2 - Cth O Bridge||Map||Data|
Bostwick Creek is located in the Lower La Crosse River watershed which is 145.46 mi². Land use in the watershed is primarily forest (38%), agricultural (30%) and a mix of suburban (12%) and other uses (19%). This watershed has 295.20 stream miles, 1,187.12 lake acres and 5,641.64 wetland acres.
Nonpoint Source Characteristics
This watershed is ranked Medium for runoff impacts on streams, Not Ranked for runoff impacts on lakes and Low for runoff impacts on groundwater and therefore has an overall rank of Low. This value can be used in ranking the watershed or individual waterbodies for grant funding under state and county programs.However, all waters are affected by diffuse pollutant sources regardless of initial water quality. Applications for specific runoff projects under state or county grant programs may be pursued. For more information, go to surface water program grants.