Funding Body
- Federal Highway Administration (FHWA)4
- Pew Charitable Trusts1
- The research upon which this publication is based was supported by funds provided by the United States Department of Interior, Office of Water Resources Research, as authorized under the Water Resources Research Act of 1964.1
- The research upon which this report is based was financed in part by the U.S. Department of the Interior, Washington, D.C., under the Mt. St. Helens Research and Development Program.1
- This educational content was developed with funding support from the Federal Highway Administration (FHWA).1
- This material is based upon work supported by the H.J. Andrews Experimental Forest and Long Term Ecological Research (LTER) program under the NSF grant LTER8 DEB-2025755.1
- This research has been supported in part by the National Science Foundation under Contract No. CCR-89-02496.1