To assist with a Final Design Engineering project for the proposed replacement of the Railroad bridge over the Pawcatuck River, GdB Geospatial was contracted by HNTB corporation to provide various land surveying services. This effort began with haste as efforts were already underway for this project and GdB was brought in to supplement and complete a previous survey firm’s effort that were deemed unsatisfactory and incomplete. GdB Geospatial fast tracked administrative efforts to obtain Authorization and License to complete the work in Rhode Island.  As this project site is still an active rail operation over a bridge, GdB opted to use newly captured aerial imagery, augmented and supplemented by field edits and checking. GdB survey crews first visited the site to set and locate aerial targets on the ground and outside of the project limits to properly place the mapping in the required horizontal and vertical datum. Any and all planimetric features on site were mapped from aerial imagery. Specific attention for field crews was paid to the heavily vegetated areas that lay beyond the right-of-way. Additional supplemental survey was needed where two state highways cross the right-of-way, one of which is an overpass. GdB crews also located wetland flags, boring and other technical data placed by others at the time of GdB’s site visit.