Greenland Wildlife Overpass vs Annenberg Wildlife Crossing. Which is bigger? Mary Cummins Animal Advocates

Greenland Wildlife Overpass

Annenberg Wildlife Crossing

I just heard that the Greenland Wildlife Overpass will be the largest wildlife crossing in the world. They broke ground January 2025 and expect to finish December 2025. The overpass will go over six lanes of the I-25 in Colorado. The cost is $15,000,000. I was wondering how that compares to our Wallis Annenberg Wildlife Crossing. Here are the numbers below.

Greenland Wildlife Overpass
Size: 209' x 200' wide, 41,800 sf area, six lanes
Cost: $15M 
Location: I-25, Monument, Douglas, Colorado
Time to build: one year

https://www.codot.gov/projects/i25greenlandwildlifeoverpass

Annenberg Wildlife Crossing

Size: 210' x 165' 34,650 sf area, ten lanes
Cost: $90M
Location: 101 fwy in Agoura Hills, Los Angeles, California
Time to build: April 2022 ground breaking, expected completion June 2026, four years

https://en.wikipedia.org/wiki/Wallis_Annenberg_Wildlife_Crossing

Colorado crossing is larger, cost less and will be built more quickly. There are of course some major differences. The Colorado one is on flat ground and only goes over one freeway. Annenberg one is on sloped hilly ground and goes over one freeway and a two lane street. Things cost a lot more in Los Angeles, California especially construction, materials and labor. I've been a real estate appraiser, broker over 42 years and appraise construction projects. We also have seismic, soils issues and requirements besides CEQA and other regulations. I don't know if they are including the cost of buying the land. California crossing had to purchase some land for access. It wasn't all county land. 

Nice to see other states building wildlife crossings. I'm sure the cost of the crossings will go down with the sharing of plans, research and technology. 

Mary Cummins of Animal Advocates is a wildlife rehabilitator licensed by the California Department of Fish and Game and the USDA. Mary Cummins is also a licensed real estate appraiser in Los Angeles, California.

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