Forest engineers must frequently make flood frequency estimates for
very small watersheds when designing culvert installations. Empirical
formulae and simplified rainfall runoff models, the most commonly used
techniques to predict floods from very small watersheds, require considerable
engineering judgement to give reasonable results. As an alternative
to such methods, this...
Culverts and road crossings potentially create barriers that impede or prevent
movement and migration of all life stages of resident and anadromous fish. There
have been very few studies of juvenile salmonid movements through retrofitted
(baffled) culverts in the field. Two separate studies were conducted to assess
juvenile cutthroat trout...
Twenty-one countersunk culverts in Oregon were inventoried to establish baseline information for the stream crossings so that subsequent resurveys can assess the long-term stability and functionality of the culvert design. A subset of the inventoried culverts was selected for detailed hydraulic measurements. The detailed velocity measurements were used to help...
WRRI 106 is placeholder for the research findings of Project No. G-928-03 funded by U.S. Dept. of the Interior, Geological Survey. Findings are available in Piehl, Bradley T. (1986) An evaluation of culverts on low volume forest roads in the Oregon Coast Range (Masters Thesis, Oregon State University. Forest Engineering)...
Three culverts, judged to be fish barriers, were replaced with "stream simulation" culverts on the Fremont National Forest of south central Oregon. The culvert sites are located in the Fort Rock Basin in streams that are home to resident Great Basin redband trout (Oncorhynchus mykiss). Great Basin redband trout is...