Complete in 2014, the Fourmile Creek Watershed Management Plan is used to guide all watershed improvement efforts. The plan was created following a detailed watershed assessment and stakeholder input from groups such as rural residents, local leaders, environmental agencies, and urban residents. This plan outlines a series of watershed goals aimed at reducing flooding and improving water quality.

The bedrock of the Fourmile Creek watershed consists of marine sedimentary rocks deposited over 350 million years ago