Watch: California embarks on massive wildlife overpass

California is building what state transportation officials will be the world’s largest wildlife overpass. Paid mostly with private donations, the overpass will span 200 feet across 10 lanes of U.S. 101 about 35 miles northwest of downtown Los Angeles. “When the freeway went in, it cut off an ecosystem. We’re just now seeing impacts of that,” Beth Pratt of the National Wildlife Federation told The Associated Press. Conservationists say the freeway isolates species populations, including mountain lions (Puma concolor), limiting their genetic diversity. Construction of the $87 million bridge is scheduled to start within two years.

Read more from the Associated Press here, and watch the video below.