Design Analysis to Support 4(f) and Section 4(f) Analysis Reports for Historic Bridges Statewide


CONSOR Engineers is performing a third consecutive contract for design analysis to fulfill Section 4(f) requirements for historic bridges. The analysis includes but is not limited to documenting existing bridge conditions; evaluating rehabilitation options for existing bridges; evaluating the use of existing bridges as a one-way pairs or for pedestrian use; and constructing new bridges on offset alignment, leaving the existing bridges in place. The project includes alignment studies and cost estimates. Avoidance alternatives are presented to be evaluated by the FHWA. Notable projects to date include steel truss bridges and a reinforced concrete arch structure. SH-123 over the Caney River in Washington County, Oklahoma is a steel truss bridge in Bartlesville, Oklahoma; site of the first commercial oil well in the state of Oklahoma. SH-66B over Captain Creek in Lincoln County, Oklahoma is a skewed steel truss bridge that once carried a portion of Historic Route 66 near Wellston, Oklahoma. SH-33 over Tiger Creek in Creek County, Oklahoma is a reinforced concrete arch in downtown Drumwright, Oklahoma. Each structure has unique site conditions and features that result in the structure being historically significant. We have performed a complete and thorough analysis of the structures, and avoidance alternatives are presented in a manner that allows for the determination to be made as to whether each option is feasible or prudent. Subsequent task orders have involved the review of 4(f) design analysis reports prepared by other consultants.