Atlas of the Biodiversity of California. About the Atlas. The Atlas of the Biodiversity of California is a fascinating guide to the state's biological resources. This book is a bound collection of maps, stunning photographs, and artistic illustrations â all depicting the state's rich diversity of plant and animal species.
Typically, costs for installing a concrete access ramp fall between $1432 and $2377 and will vary with the size and features of construction as well as with your choice of finishes and landscaping elements.
Ramp prices depend on the overall length, the number of landings, the materials (wood or aluminum), and whether you build it yourself or hire a contractor. You can build one yourself for a materials price of about $35 per lin. ft., or hire a ramp contractor to build it for you in a day or two for about $100 per lin. ft. Prefabricated aluminum sections cost about $100 per lin. ft., and you can assemble the sections yourself. But they take a while to order and ship.