The Elk River Watershed Association (ERWSA) was formed to enable Sherburne and Benton Counties to work together to implement Local Water Management Plans. Since its formation in 1994, the ERWSA has primarily focused on working with land owners to reduce non-point sources of pollution within the watershed. Sherburne and Benton SWCD staff have extensive experience installing conservation practices. The ERWSA draws support from Sherburne County, Benton County, and local lake associations.
Little Rock Creek is the only trout stream in the Benton and Morrison County area. The creek has supported a wild brown trout population since they were introduced into Little Rock Lake in 1908. A population assessment done in 1992, however, failed to document the presence of brown trout suggesting that population may have become critically low during the drought years of the late 1980's and early 1990's. The stream has since been listed as impaired due to the low abundance of trout and other cold water fish.