TY - RPRT TI - Level II scour analysis for Bridge 21 (WALDTH00450021) on Town Highway 45, crossing Joes Brook, Walden, Vermont AU - Michael A. Ivanoff AU - Laura Medalie PY - 1997 DO - 10.3133/ofr97799 UR - https://pubs.usgs.gov/publication/ofr97799 ID - ofr97799 ER -