Level II scour analysis for Bridge 25 (BRNATH00290034) on Town Highway 29, crossing Locust Creek, Barnard, Vermont
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Abstract
The site is in the Green Mountain section of the New England physiographic province in central Vermont. The 11.5-mi2 drainage area is in a predominantly rural and forested basin. In the vicinity of the study site, the surface cover is forest, except for pasture on the downstream right overbank.
In the study area, Locust Creek has an incised, generally straight channel with a slope of approximately 0.03 ft/ft, an average channel top width of 64 ft and an average channel depth of 7 ft. The predominant channel bed materials are gravel and cobble with a median grain size (D50) of 89.3 mm (0.293 ft). The geomorphic assessment at the time of the Level I and Level II site visit on October 13, 1994 and December 16, 1994, indicated that the reach was stable.
The Town Highway 29 crossing of Locust Creek is a 37-ft-long, one-lane bridge consisting of one 32-foot concrete span (Vermont Agency of Transportation, written communication, August 23, 1994). The bridge is supported by vertical, concrete abutments with wingwalls. The channel is skewed approximately 25 degrees to the opening while the opening-skew-to-roadway is 25 degrees. There was no observable scour protection measure at the site. Additional details describing conditions at the site are included in the Level II Summary and Appendices D and E.
Study Area
Publication type | Report |
---|---|
Publication Subtype | USGS Numbered Series |
Title | Level II scour analysis for Bridge 25 (BRNATH00290034) on Town Highway 29, crossing Locust Creek, Barnard, Vermont |
Series title | Open-File Report |
Series number | 96-642 |
DOI | 10.3133/ofr96642 |
Year Published | 1996 |
Language | English |
Publisher | U.S. Geological Survey |
Description | iv, 50 p. |
Country | United States |
State | Vermont |
City | Barnard |
Other Geospatial | Locust Creek |
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