Engineering
Aquatic Organism Passage at Road-Stream Crossings
Alan Yamada, Program Leader
Kim Clarkin, Project Leader
The design, construction and maintenance of the road crossing shall not disrupt the migration or other movement of those species of aquatic life inhabiting the water body.
-BMP 6vii required for exemption from Clean Water Act Section 404 Permit Requirements (40 CFR 232.3)
Olympic torrent salamander (Olympic Nat'l Park website)
Stream simulation culvert at Surveyor Creek, Lolo NF, 2007
