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3w ago

First Soil Laid on World’s Largest Wildlife Crossing in California

The Wallis Annenberg Wildlife Crossing, designed to reconnect habitats and promote biodiversity, progresses toward its 2026 completion with a major construction milestone.

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First layers of soil and the building of rock features, continue on Monday, March 31, 2025, on the surface of Wallis Annenberg Wildlife Crossing launching what will become a nearly 1-acre native wildlife habitat above ten lanes of the 101 in Agoura Hills. (Photo by Dean Musgrove, Los Angeles Daily News/SCNG)

Overview

  • Crews began laying 6,000 cubic yards of soil on March 31, 2025, marking a critical step in the construction of the Wallis Annenberg Wildlife Crossing.
  • Spanning 10 lanes of the 101 Freeway in Agoura Hills, California, the crossing will be the largest wildlife bridge in the world upon completion.
  • The project aims to reconnect fragmented habitats in the Santa Monica Mountains and Simi Hills, addressing genetic isolation in species like mountain lions.
  • Future phases include planting 50,000 native plants and trees, creating a sustainable habitat and reducing fire hazards in the region.
  • Funded by a $92-million effort led by the Annenberg Foundation, the crossing is expected to serve as a global model for urban wildlife conservation.