Citation

Singer FJ, Langlitz WL, Samuelson EC. Transp. Res. Rec. 1985; 1016: 6-10.

Copyright

(Copyright © 1985, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

US-2 was reconstructed in Glacier National Park, Montana, past a natural mineral lick and crossing area regularly used by mountain goats (Oreamnos americanus). A bridge was built over the highway as an underpass for goats (underpass dimensions = 12 to 28 ft high x 90 ft wide x 44 ft through). A second bridge over a stream crossing located 200 ft to the east was improved for mountain goat underpassages. Cyclone fencing 8 ft high and reinforced earth walls 8 to 24 ft high forced goats to use the bridges in a 500-ft crossing zone. Most crossing goats (99.4 percent) used the two bridges. Mountain goats were disturbed less after the bridges were built. Goats extended their season of visits to the lick into fall and winter, and individual goats doubled their number of lick visits per year after the bridges were built.

Record URL:
http://onlinepubs.trb.org/Onlinepubs/trr/1985/1016/1016-002.pdf

Language: en

Keywords

BRIDGES, HIGHWAY; HIGHWAY ENGINEERING; ECOLOGY; BRIDGES - Construction; ENVIRONMENTAL ENGINEERING