Kerite, the U.S.-based manufacturer of medium- and high-voltage high-quality insulated power cable products, completed the installation of a 2000 kcmil, 138 kV underground cable circuit under the runway and taxiway at the Dayton-Wright Brothers Airport — a midsize airport in Miamisburg, OH, approximately 12 miles south of Dayton.
The installation project for Dayton Power & Light (DP&L) was completely managed by Kerite, which utilized its legacy expertise to provide a turnkey solution. Kerite also hired national utility contractor Anderson & Wood to assist with engineering of the project and excavation work in the field.
The first step in the complex process was to remove the existing circuit of high-pressure, oil-filled cable, which required proper remediation and disposal techniques to help protect the local watershed. Once the existing circuit was removed, Kerite chose to use a jack and bore trenchless system with a 24-inch steel casing that ran 560 feet under the runway and another 140 feet under the taxiway. The complete cable length of 2,150 circuit feet was shipped on a single reel directly from the Kerite plant in Seymour, CT. Upon arrival in Miamisburg, a 400-ton crane was needed, due to the reel weight (27,000 pounds) and the extended pick and set distance from the truck to the substation.
Adding complexity to the installation was the presence of a high-pressure natural gas main that intersected the new circuit, requiring the Kerite team to obtain special permits to bore 3 feet below the 18-inch pipe.
During the installation process, the airport was completely operable, requiring daily access and clearance approval from airport security for all Kerite crews. The crews also had to maintain a 250-foot Runway Object Free Area for all equipment and crew members, to ensure a safe working environment for aircraft and for everyone in the field.