Construction begins on world’s largest wildlife crossing in California

In California, construction on the Wallis Annenberg Wildlife Crossing commenced in 2022, marking an important step in wildlife conservation efforts. This project aims to provide safe passage for diverse wildlife, including mountain lions, deer, and bobcats, across the 101 Freeway, which has been notorious for wildlife fatalities. The crossing is designed to be the largest of its kind globally and spans 10 lanes of traffic. It is financed through a combination of state and private donations, with a total projected cost of $92 million. As of early April 2025, the construction has reached a significant milestone with the placement of the first layers of soil. This development is intended to create a nearly one-acre habitat featuring approximately 5,000 native plants, which will contribute to the support of various animal species and help mitigate habitat fragmentation caused by urban infrastructure. The project has been in development for over a decade, driven by the need to revitalize declining animal populations and prevent wildlife deaths on highways. Concerns have been raised by local residents regarding the necessity and cost of the project. Some argue that the funding could be better used to address pressing public safety issues such as traffic accidents or homelessness. There is also fear among some community members about a potential increase in mountain lion encounters resulting from the crossing. Despite these concerns, conservationists emphasize the importance of this project in protecting California's biodiversity and enhancing the connectivity of wildlife habitats. The project is expected to be completed in 2026, and it represents a crucial advancement in the efforts to safeguard wildlife in the region. The next phase of the project is set to begin in May 2025, with the introduction of approximately 5,000 native plants to support the targeted ecosystems. As the wallis Annenberg Wildlife Crossing nears completion, its potential benefits for wildlife and the ongoing dialogue about balancing environmental concerns with community needs remain central to discussions about this ambitious undertaking.