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Gird Your Lanes! Framing Causes Closures on 101

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Closure on the 101

The first of 81 concrete beams, or girders, have been positioned across the southbound lanes of the 101 Freeway on the Annenberg Wildlife Crossing under construction just west of the Liberty Canyon offramp. 

Each girder weighs between 126 and 140 tons and is placed between the center of the freeway and the shoulder. 

Putting all girders into place is estimated to take four to six weeks.

During the girder work, Cal Trans is closing the freeway in one direction each night beginning at 11:59 pm Monday through5 am Friday morning. Lanes in the opposite direction will stay open. Detours will be clearly marked on side streets.

The wildlife bridge is designed to help animals,  in particular mountain lions, safely cross the 101 Freeway. The bridge will connect the Santa Monica Mountains to the Simi Hills in order to save the local mountain lion population from extinction. A study from UC Davis Road Ecology Center shows that between 2015 and 2022, one or two mountain lions were killed every week on roads and highways across the state. 

When finished the crossing will be 210 feet in length and 174 feet in width, stretching across the entire freeway and Agoura Road into open space, with 12 acres of ecological reconstruction planting native vegetation to help the bridge blend into the environment. 

It is being billed as the largest wildlife crossing in the world. The project broke ground in 2022 and is expected to be completed by 2025. 

Construction of the bridge will cost approximately $92 million. Wallis Annenberg gave a $25 million grant to the National Wildlife Federation to help fund the project.   

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23 hours ago

Valley News Group
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