Honolulu, Oahu

The Mauka Concourse at Daniel K. Inouye International Airport (HNL) in Honolulu is a 230,000-square-foot extension to Terminal 1 (Interisland Terminal), opened in August 2021 as the first major gate expansion there since 1993. This $270-340 million facility adds six wide-body or up to 12 narrow-body gates with dual passenger loading bridges each, easing midday peak congestion for Hawaiian Airlines' neighbor island flights and accommodating 8,000 daily travelers with new TSA checkpoints (six lanes), USDA stations, hold rooms, concessions, retail, restrooms, and info kiosks. It connects seamlessly post-security to the existing terminal via walkways, enhancing flow for kama'aina (local) passengers while tying into HNL's modernization program.​

The design celebrates Hawaii's essence through a soaring two-story "glass prism" with floor-to-ceiling windows and skylights flooding the space with natural light, blending interior and exterior views of the Waialua Ahupuaa cultural landscape via commissioned art sculptures and Hawaiian motifs. Amenities prioritize passenger comfort with eco-shafts directing AC efficiently, high-performance envelopes cutting solar heat, and LEED Gold certification for sustainability—HNL's greenest terminal addition. It relieves overcrowding amid rising travel demand, supporting Oahu's role as Hawaii's aviation gateway without state taxpayer funds, financed via bonds and fees.​

From a technical standpoint, the concourse uses an innovative open-truss structural system with light wells and no interior load-bearing walls for flexibility, self-supported by eco-shaft framing over 23 acres of taxiway asphalt and 9.5 acres of concrete paving. Hensel Phelps self-performed 300,000+ craft hours on concrete (site, structural, precast), jet blast barriers, fencing, finishes like millwork and trellises, plus demolition of utilities and buildings. LED lighting, ventilation shafts, and resilient paving handle Hawaii's seismic, wind, and humidity loads, with integrated wayfinding promoting aloha culture through native materials and graphics.