Unit cost is provided in cubic yards. When calculating facility costs, estimate the total volume of excavation for specific project conditions.
How the Default Unit Cost was Determined
An Internet search was conducted to identify estimated excavation costs. The expectation was that information would not be available specifically for bike trail projects. However, general excavation costs for roadway projects were sought to approximate bike trail excavation costs, as well as a bike lane?s share of roadway excavation costs. A review of several websites resulted in a range of excavation costs, typically provided in cost per cubic yard. The Contra Costa Bicycle Pedestrian plan uses a wide range of $10-50 per cubic yard for excavation for a shared use pathway. Advanced Drainage Systems, the largest manufacturer of drainage equipment, identified $5 to $15 per cubic yard as the national standard range for excavation costs. Since this factor is based on volume rather than facility length, its use will require some understanding of excavation needs for the specific bike facility.