The Lewis Center Mega Site is the proposed location for a 1,100 acre mixed use development in Delaware County, Ohio. To meet the requirements of the US Army Corps of Engineers (USACE) waterway permitting process, an archaeological investigation was required for the 550 acres that were to be developed during the first phase of the project. L&A was tasked, as a subconsultant to the lead civil engineering firm, with performing a Phase I Archaeology Survey using controlled surface collection, systematic shovel testing and visual inspection. Several (123) previously undocumented archaeological sites were identified during survey work, including 121 ephemeral prehistoric sites, one (1) multicomponent site, and one (1) dense prehistoric occupation. The dense prehistoric site consisted of a diverse artifact assemblage with several tools identified, as well as, fire-cracked rock (FCR) scattered across the landform. This site was recommended as potentially eligible for inclusion in the National Register of Historic Places (NRHP) with further investigation warranted should it be impacted by the project.