Hydrologic Unit Code (HUC-12): 070900040601
Area: 19.9 square miles (12,763 acres); 7% of Lower Sugar River Watershed
County: Green County/Sylvester, Decatur and Mount Pleasant Townships
Primary Land Uses: Agriculture (cropland 58%, pasture/hay 28% of landcover/2011)
Points of Interest:
Siting of 5800 head dairy cow concentrated animal feeding operation (CAFO), Pinnacle Dairy, LLC in Sylvester Township on Decatur-Sylvester Road is pending. To view the status of its Wisconsin Pollutant Discharge Elimination System (WPDES) permit click here and here.
Oliver Prairie State Natural Area is the only Natural Area in this subwatershed.
Water Quality: Impaired - 303d listed for habitat destruction and sedimentation.
At a Glance
- Searles Creek, 10.3 miles, flows eastwardly draining a flat-bottomed basin and empties into the northern end of Decatur Lake, an impounded lake formed by the damning of the Sugar River in the mid 1800’s.
- Segments of Searles Creek have been ditched and straightened to enhance drainage and to increase plowing efficiency. In some reaches the creek’s edge is buffered by trees and vegetation while other reaches are grazed right down to its edge.
- At riffles and runs, WDNR biologists have noted that the creek bottom consist of 60% silt and clay, a poor fishery habitat.
- The creek has been placed on the state’s list of impaired [section 303(d)] waters because of habitat destruction and sedimentation. Heavily tilled cropland lacking buffers and banks eroded by grazing animals are heavy contributors to its demise.
What does it mean for a body of water to be 303(d) listed? Waters listed in Section 303(d) of the Clean Water Act do not meet their designated uses (fishing and swimming) and must be listed. Searles Creek’s total maximum load (TMDL) for sediment was determined in 2005. TMDL refers to the amount of pollutant, in this case sediment, that the water can assimilate and not exceed water quality standards.
The stream for the most part is heavily silted; however, it is possible to paddle from the northern end of Decatur Lake to beyond Park Road where its banks are nicely wooded. The south facing bank is quite rocky and steep and if you paddle far enough you will find a rather large boulder jutting from the hillside. Paddling much beyond this point becomes problematic as the creek becomes shallow, narrows and is choked with deadfall. Historical records reference "Hanging Rock" on the north facing bank, about a half mile walk along the stream bank from Park Road, but it is not accessible for viewing by paddling the creek.
Biking the country roads transversing the rolling hills and valleys of this subwatershed (as well as others) will give you plenty of exercise and pastoral views.
Oliver Prairie State Natural Area Located off Oliver Road it is very small undisturbed remnant dry prairie containing more than 70 prairie species. To access this gem contact the University of Wisconsin-Madison Arboretum at (608) 263-7344.
Did You Know?
In the not too distant past, Searles Creek was known as Jordan Creek or Little Jordan Creek. Seems there were two creeks in the vicinity with the same name so one had to be changed to avoid confusion.
Ongoing monitoring of the Creek at Park Road began in 2013 by Water Action Volunteers (WAV). Results for this site and two others can be found elsewhere on our website.
For a printable PDF map of Searles Creek Subwatershed click here.