Locating Your Trail Bridge for Longevity
Web Sites
Information on Siting Trail Bridges
Stream Classification and Identification
- Fundamentals of the Rosgen Stream Classification System
- Montgomery and Buffington
- A Guide to Identification of Bankfull Stage in the Northeastern United States
- Stream Channel Reference Sites: An Illustrated Guide to Field Technique
Hydraulics and Hydrology
- NRCS Hydraulics and Hydrology Training
- USGS National Streamflow Statistics Program
- WinXSPRO: A Channel Cross-Section Analyzer
- Hydrologic Engineering Centers River Analysis System (HEC-RAS)
Aerial Photographs and Topographic Maps
- Google Earth
- Microsoft Virtual Earth
- Forest Service Topographic Maps (available only to Forest Service employees)
- http://mapmaker.esri.com/fstopo/
- (User ID: fstopo, Password: maps)
- This site provides Primary Base Series (PBS) or Single Edition Series (SES) maps as a raster image of the Forest Service 1:24,000 scale topographic map, including the collar information (legends and other text outside the map).
Trail Bridge Types
- Trail Bridge Catalog
Crossings
- Low-Water Crossings: Geomorphic, Biological, and Engineering Considerations
Additional Information
- U.S. Department of Agriculture, Forest Service, Stream Systems Technology Center
- U.S. Department of Agriculture, Forest Service, National Technology and Development Program, Stream Simulation: An Approach To Providing Passage for Aquatic Organisms at Road-Stream Crossings
- U.S. Army Corps of Engineers–Hydrologic Engineering Center (HEC)
- U.S. Geological Survey, Water Resources

