Featured in IQ: 2015 Volume 7 Issue 1
Garver regularly provides clients with airport lighting design services, but M. Graham Clark Downtown Airport (PLK) near Branson, Missouri had a project that forced Garver to think outside typical design methods.
The airport needed a runway lighting system for a 3,700-ft. runway with displaced thresholds. However, when PLK was built, the tops of two hills were leveled and the area between the hills filled in to construct the original runway, which resulted in both ends of the runway being displaced and having non-standard FAA slopes and safety areas. Both ends required significant rock fill in order to build up the grade.
"Significant embankments start within 10 feet of the runway ends, which presented concerns during design of the runway end lights," said Project Manager Bart Gilbreath.
Garver designed a lighting system utilizing shallow base cans at the FAA-minimum allowable 2 feet from usable pavement, shallow concrete-encased conduit ducts and shallow grounding system to meet NEC requirements, and outboard threshold lights mounted on approach-lighting style low-impact-resistant structures. Due to the close proximity of the taxiway to the runway, outboard threshold lights were spaced closer than standard to fit uniformly between the runway and taxiway pavements.
"Garver planned our lighting rehabilitation with the total project in mind," said Airport Manager Mark Parent. "I'm looking forward to working with them on our next and future projects."
In addition to the lighting system, Garver designed electrical vault modifications with a new home run duct bank that included a new constant current regulator, new electrical power panel, and new lighting control panel with pilot-controlled radio.