TY - RPRT TI - Level II scour analysis for Bridge 20 (IRASTH00080020) on Town Highway 8, crossing the Black River, Irasburg, Vermont AU - Scott A. Olson PY - 1996 DO - 10.3133/ofr96154 UR - https://pubs.usgs.gov/publication/ofr96154 ID - ofr96154 ER -