Aquatic Organism Passage Program
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Undersized culverts are assessed for replacement using the Forest Service's stream simulation design approach.
Road damage occurs and stream quality is affected by high flow events with improperly sized road structures.
Ensure aquatic organism passage
Assessments confirm the ecological importance of providing passage through road-stream crossings for all native aquatic and riparian species over all of their life stages to provide for robust communities and resilience to climate change stresses. Restoration work accomplished under this program occurs on forest highways, roads, and irrigation diversions in cooperation with state and county transportation agencies, landowners and a wide range of interest groups.
Pronounced "Fish Crossing"
“FishXing”, Software and Learning Systems for Fish Passage through Culverts, is software that is intended to assist engineers, hydrologists, and fish biologists in the evaluation and design of culverts for fish passage. It is free and available for download.