Lancaster and York Counties
This project includes the preliminary engineering, final design, and construction consultation for the rehabilitation of the Columbia/Wrightsville Bridge over the Susquehanna River in Lancaster and York counties. The Columbia/Wrightsville Bridge is listed on the National Register of Historic Places. The bridge was the longest multi-span concrete arch bridge in the world when built. In addition to its 28 arch spans each spanning an impressive 185 feet, an additional 20 approach spans (mostly curved t-beams) complete the bridge which is over a mile long in total length. Also, with a 48 foot wide out-to-out deck width containing a 38 foot roadway, this is also a fairly wide bridge for its age as well. The length of the bridge coupled with its width results in a bridge with a footprint of about eight acres. AEG survey services included staking the alignment, setting permanent benchmarks and establishing horizontal control to facilitate the use of a drone to scan the bridge deck surface. In addition, AEG, using conventional survey methods, will locate the utilities and the high water mark as visible, and obtained topographic features. AEG is providing PNDI Threatened and Endangered Species review and coordination with regulatory agencies as required. AEG will also prepare the Categorical Exclusion Evaluation and any additional coordination required.