The watershed plan and its appendices for the Water Resource Inventory Area (WRIA) 56, the watershed of Hangman Creek, provides a comprehensive review of water resources in the watershed and outlines strategies for future management. These strategies take the form of recommendations, obligations and position statements for the WRIA 56 Planning Unit, a working group of state and local governments, and organizational and private representatives. The Planning Unit developed the following mission statement for the watershed plan:
To preserve, manage, and enhance the water resources of Hangman (Latah) Creek for beneficial uses of humans, wildlife, and fisheries.