Colorado wildlife mitigation study shows effectiveness of overpasses and underpasses on Highway 9

June 09, 2025 | Chaffee County, Colorado


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Colorado wildlife mitigation study shows effectiveness of overpasses and underpasses on Highway 9
The Chaffee Board of Commissioners held a work session on June 9, 2025, focusing on strategies to mitigate wildlife collisions on local roadways. The meeting addressed various approaches to enhance road safety while considering the impact on wildlife.

The discussion began with an evaluation of current road design practices. Commissioners noted that certain methods, such as reducing road design speeds and narrowing road widths, could be more effective than previously considered. Traffic calming measures were also highlighted as potential solutions to decrease the likelihood of collisions with wildlife.

A significant portion of the meeting was dedicated to the importance of wildlife fencing and the implementation of at-grade crossings. The commissioners discussed the necessity of creating wildlife passage structures, particularly for smaller species, to reduce road mortality rates. The conversation emphasized that while larger animals like moose pose a serious risk in collisions, smaller animals also contribute to road safety concerns.

To illustrate the effectiveness of these measures, a case study was presented regarding Highway 9 between Green Mountain Reservoir and Kremling. Data from 2011 to 2015 showed a concerning number of ungulate deaths along this stretch. However, after the completion of major projects in 2016, which included the installation of two overpasses and five underpasses, road mortality rates significantly decreased from 2016 to 2020. The data indicated a marked reduction in wildlife fatalities, underscoring the positive impact of infrastructure improvements.

The meeting concluded with a consensus on the need for continued investment in wildlife safety measures and further evaluation of their effectiveness. The commissioners agreed to explore additional strategies to enhance road safety for both drivers and wildlife in Chaffee County.

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Scribe from Workplace AI
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