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Fuel Pier Cathodic Protection Inspection and Upgrade

Gilbane completes D-B repairs to base-wide cathodic protection system in Portugal.

Gilbane completed mission critical JP-8 jet fueling system repairs at an operational airfield at Lajes Field, which is located in the Azores. Lajes is a Portuguese archipelago in the Atlantic Ocean that is subject to erratic weather, including heavy rain, sleet and winds. Because the project site was on an active runway, the team had coordination with the airfield tower. Also, all equipment and materials had to be imported by sea from the U.S. and Europe.

Design-build repairs to the base-wide cathodic protection (CP) system included new rectifiers, CP test stations, and new anodes on underground fuel pipelines. While validating the conceptual design, many existing CP system components were discovered to be non-functional or non-reliable. Also, the CP system at the South Pier Tank Farm needed repair. Gilbane performed these repairs and evaluated mechanical deficiencies and identified required repairs at the tank farm and pier.

Gilbane excavated and constructed an underground, cast-in-place concrete vault east of the existing south tank farm entry guard house to contain the flange joints on the underground fuel lines and enable future inspections. Gilbane also wired cabling to the flange joints on the fuel lines to provide better monitoring of CP performance. The team performed design-build replacement of a fuels receipt piping system manifold for unloading fuel tankers; inspected welding and pipe coatings; and performed start-up and testing.