Colville River Nigliq Channel Bridge

NPRA CD-5 - Nigliq Bridge  (Credit: CPAI)
NPRA CD5 - Drill Rig Pad (Credit: CPAI)
NPRA CD5 - Nigliq Bridge Structure setting and OCSP Abutments (Credit: CPAI)
NPRA CD5 - Nigliq Brige setting at Sunset (Credit: CPAI)
NPRA CD5 - Nigliq Bridge, Winter  (Credit: CPAI)

Client: ConocoPhilips Alaska (CPAI)
North Slope, Alaska

CD5 - Nigliq Bridge Inspections, North Slope, AK

PND was responsible for civil infrastructure design for ConocoPhillips Alaska, Inc.’s CD5 Arctic resource development project on the North Slope of Alaska. The project involves a six–mile gravel road, resource development gravel pad, four significant bridges, and a multi-season ice pad constructed over permafrost.  The Nigliq Channel Bridge is a 1,421-foot vehicle bridge across the Nigliq Channel of the Colville River. It is a box girder design with seven (7) in-stream ice breaking piers. Its foundation system consists of three (3) 48” piles embedded in complex geotechnical conditions ranging from thawed to permafrost soils and two (2) ice breaker support piles supporting a slanted ice breaker. Access to the site from existing infrastructure can only be provided in winter months via ice roads. Therefore, the bridge was launched during fall months to allow construction to occur during the off-season and to meet overall schedule.

For more information, click here. Contact any PND office for additional information about this and related resource development and Arctic region projects. A CPAI-produced video about this project can be found here.

This is the second consecutive year PND-designed projects have been named among Roads & Bridges magazine's Top 10 projects. In 2015, the North Prince of Wales Road, Deweyville Trailhead to Neck Lake Road project was named No. 1. Read more about that project here.