In 2014, ASWM completed a national study on stream identification, delineation and mitigation in the United States. The project interviewed state staff from 47 states. To download the full report, entitled, Report on State Definitions, Jurisdiction and Mitigation Requirements in State Programs for Ephemeral, Intermittent and Perennial Streams in the United States, click here.
Many states now have stream mitigation programs. However, there are distinct differences in the practices and administration of these programs. The following links provide information about some of these programs.
- Stream Restoration Databases and Case Studies: A Guide to Information Resources and
Their Utility in Advancing the Science and Practice of Restoration (2006)
Leading Stream Mitigation State-level Tools:
Green = listed in 2010 EPA Report
Across the United States, state and federal agencies, tribes, local government and private sources are working to develop guidance for the mitigation of streams and compensatory mitigation. The following list of resources provides an array of these documents, demonstrating not only the current state of practice, but also the diversity of approaches being employed in different regions of the country.
- Arkansas Little Rock District Stream Method (Revised) (Borrowed from Mobile District Method)
- Missouri Method (in place since 2007)
How streams are identified and assessed are not consistent practices across the United States. This webpage provides links to resources that provide specific methods or approaches to identification and assessment.
- Physical Stream Assessment: Review of Selected Protocols for Use in Clean Water Act Section 404 Program (EPA, 2004)
- Equations for Estimating Bankfull Channel Geometry and Discharge for Streams in Massachusetts (USGS Scientific Investigations Report 2013-5155)
- Texas Commission on Environmental Quality: Surface Water Quality Monitoring Procedures, Vol. 2 - Methods for Collecting and Analyzing Biological Assemblage & Habitat Data