Documented Cost Estimate. A documented cost estimate is an itemized estimate of costs broken down by phase for a project. Preliminary engineering estimates can be based on a percentage of historical construction costs, or based on historical labor and equipment needs used to complete similar design efforts. Right of way estimates will be the right of way funding estimate (Appendix 25.51). Construction estimates will be the engineer’s estimate, including construction engineering costs. Bid tabulations, or award data may be used to justify increases when completing Supplemental Agreements. Acceptable references for building a documented estimate may be historical construction costs, estimates from recent similar work, WSDOT Unit Bid Analysis, or other estimating methods that clearly identify how the costs were determined. A cost estimate must be provided for each authorized phase on the Local Agency Agreement.
Documented Cost Estimate. A documented cost estimate is an itemized estimate of costs broken down by phase for a project. Preliminary engineering estimates can be based on a percentage of historical construction costs or based on historical labor and equipment needs used to complete similar design efforts. Right of way estimates will be the right of way funding estimate5. Construction estimates will be the engineer’s estimate, including construction engineering costs. Bid tabulations, or award data may be used to justify increases when completing Supplemental Agreements. Acceptable references for building a documented estimate may be historical construction costs, estimates from recent similar work, WSDOT Unit Bid Analysis, or other estimating methods that clearly identify how the costs were determined. A cost estimate must be provided for each authorized phase on the Local Agency Agreement. 4 LAG Chapter 12 5 Appendix 25.51 22.5 Appendices 22.51 Documented Cost Estimates – Example
