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Public Works

I-25 Wildlife Exclusion Fence Project



  • Colorado Department of Transportation (CDOT)
  • Colorado Parks and Wildlife (CPW)
  • City of Castle Pines
  • Town of Castle Rock
  • Douglas County

Project Update

Update – August 2022: Per CDOT, crews have moved fencing operations to east side of I-25. Installation began just south of Castle Rock Parkway and moved north toward Ridgegate Parkway, which started at the end of summer and goes into fall.  The project as a whole, including concrete panel rehabilitation on I-25 (MP 181.75 to 192.75), wildlife fencing and deer guard installation is expected to be complete at the end of October.

Newsroom Posted August 25, 2022 – CDOT crews move wildlife fencing operations to east side of I-25.

Newsroom Posted June 15, 2022 – Wildlife fencing work begins on I-25 at Castle Rock Parkway

CDOT I-25 South Gap Wildlife Fence Project


Project Summary: In response to incidents of vehicle/animal collisions along the I-25 corridor in Douglas County, the Colorado Department of Transportation (CDOT), Colorado Parks and Wildlife (CPW), the City of Castle Pines, the Town of Castle Rock and Douglas County have partnered to install 14 miles of wildlife fencing on the east and west side of I-25, from the Ridgegate exit (MM 192) in Lone Tree to the Meadows/Founders exit in Castle Rock (MM 184). In total, CDOT is currently installing four new wildlife crossings and more than 30 miles of deer fence as part of the I-25 South Gap project, which stretches across two counties (Elbert and Douglas Counties).CDOT began fence construction in April 2022 with the installation to be completed in October 2022.
Maps of Wildlife Fence Locations:
 Please note, on the maps that Alternate B was chosen as the alignment along I-25 instead of along Havana. Alternate B allows us to avoid a costly and potentially unsafe deer guard on Havana.

During fall 2022 from October to November
, is the migratory period, and drivers are encouraged to take extra caution as they travel through the corridor. Colorado is among the top states in the nation protecting wildlife migration corridors. The wildlife mitigation system installed along Highway 9 between Silverthorne and Kremmling, CO saw wildlife/vehicle collisions decrease by more than 90%. This shows promise that similar types of collisions will also decrease in the Castle Pines and Castle Rock area.


  • April 2022 – Construction began
    CDOT began fence construction with the installation to be completed in summer 2022.
  • August 2022 – After several months of work, the project team is wrapping up fence installation on the west side of I-25 (southbound) between Castle Rock Parkway and Ridgegate Parkway. Crews will continue to put in game ramps on the west side in the coming weeks, but the majority of work will shift to the east side of I-25 (northbound). Installation will begin just south of Castle Rock Parkway and move north toward Ridgegate Parkway through the end of summer and into fall.  The entire project is expected to be complete at the end of October.

Project Photos