Progress Energy Sutton Plant Subsurface Utility Engineering and Survey

Wilmington, North Carolina

KCI was selected by the WorleyParsons Group to perform a collection of subsurface utility data and provide land surveying services at the Progress Energy Sutton Plant.

Utility Designating. KCI field crews utilized various methods of utility designating including electromagnetic and ground penetrating radar technology. After all tonable lines were marked out and all record lines were accounted for, a sweep was conducted across the area in an attempt to detect undocumented lines and lines whose terminus may not lie within the project limits. Those lines were also marked out and included with the final survey. All utilities were marked according to the APWA standard color coding system. Field sketches of all utilities were prepared during designation to insure that all lines marked are surveyed. Undocumented, unknown, and/or abandoned utilities were marked, surveyed and plotted along with all anticipated utilities in order to provide a correct and more complete utility map.

Land Surveying. KCI coordinated with WorleyParsons and Progress Energy Carolinas staff to establish the locations of the proposed borings, field resistivity and REMI test line. Survey crews tied in the above ground utility features and prominent site features for reference. The intent was not to provide a complete topographic survey, but instead good reference survey for the underground utility facilities discovered during the scanning process. KCI used conventional survey methods when the crews worked in and around the industrial equipment. Site Survey controls were established utilizing Global Positioning System (GPS) technology.

With an experienced surveyor as a part of the locating crew, the horizontal and vertical position of the utility can be surveyed simultaneously.

Shane SlaughterRegional Practice Leader

Shane Slaughter

Boring Excavation. Our subsurface utility technicians excavated the upper ten feet of the proposed borings using minimally intrusive vacuum excavation methods.

By having the majority of our team cross-trained to perform in both the utility and survey phases of the SUE process, KCI was able to provide a more efficient final product in a more cost-effective manner. Our crews had the ability to set a designating project up into sections, designate and sketch all utilities in that given section, then survey all lines marked to that point. This process significantly improved the quality of the utility map as it drastically decreases the possibility of error by having the same crew designating and surveying; therefore completely aware of the lines that were marked.