Review of Proposed Bighorn Sheep Mitigation Measures Along Montana Hwy 200, East of Thompson Falls, Montana

Huijser, Marcel P.; Clevenger, Anthony P.; Western Transportation Institute

doi:10.21949/1518263

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Review of Proposed Bighorn Sheep Mitigation Measures Along Montana Hwy 200, East of Thompson Falls, Montana

2013-05-01
By Huijser, Marcel P. ; Clevenger, Anthony P.

[PDF-1.21 MB]

English

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Creators:

Huijser, Marcel P. ; Clevenger, Anthony P.

Huijser, Marcel P. ; Clevenger, Anthony P. Less -
Corporate Creators:

Western Transportation Institute
Corporate Contributors:

Montana. Dept. of Transportation
Subject/TRT Terms:

[+]

Animal Vehicle Crashes Fences Mammals Reconstruction Road Kill State Highways Ungulates Wildlife Wildlife Crossings
DOI:

https://doi.org/10.21949/1518263
Resource Type:

Tech Report
Geographical Coverage:

Montana
Corporate Publisher:

Montana. Department of Transportation
Abstract:

A section of Montana Highway 200 (MT Hwy 200) east of Thompson Falls, Montana is scheduled for road reconstruction. Bighorn sheep (Ovis canadensis) cross and spend time on and adjacent to this section of MT Hwy 200 (Foresman et al., 2007). The bighorn sheep appear to be primarily interested in licking salt off the road surface and are frequently hit by vehicles. This direct mortality is believed to be among the primary causes for the substantial decline of the local population of bighorn sheep that has been observed in recent years (Pat Basting, Personal communication, Montana Department of Transportation). The section of MT Hwy 200 between mile reference posts 55.9 and 59.1 (project names TR-E bridge and approach; E-TR-E) is scheduled for reconstruction and wildlife mitigation measures including wildlife fencing and wildlife crossing structures have been suggested (Basting, 2005; Pat Basting, Personal communication, Montana Department of Transportation). These measures are aimed at reducing collisions with large wild mammals, especially with bighorn sheep, and providing safe crossing opportunities for wildlife. This report aims to: 1. Summarize the existing site conditions, wildlife-vehicle collisions, and wildlife movements in the area - with an emphasis on bighorn sheep - based on existing information. 2. Review the mitigation measures proposed by the Montana Department of Transportation and suggest potential modifications to these mitigation measures based on the available information.
Content Notes:

For related resources, please see the US State DOT Wildlife Crossing Structures website at https://transportation.libguides.com/WildlifeCrossing
Format:

PDF
Collection(s):

University Transportation Centers US Transportation Collection
Main Document Checksum:

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urn:sha256:a4286114fa3a1fa69e0eea9573a29cb1123642903aa1e8b5183a2d696ddb9ff0
Download URL:

https://rosap.ntl.bts.gov/view/dot/44098/dot_44098_DS1.pdf
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Review of Proposed Bighorn Sheep Mitigation Measures Along Montana Hwy 200, East of Thompson Falls, Montana

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