Holdrege & Kull performed the geotechnical investigation for this new 140-foot-high, three-legged, steel, space-frame, communication tower installation project. The site was located in a remote and rugged area east of Lake Oroville, which posed logistical and scheduling challenges for the geotechnical investigation and construction phases of the project. H&K developed an innovative design approach using micropiles as an alternative to the conventional foundations that require large volumes of concrete. The use of a micropile foundation saved over $300,000 in construction costs, cut the project schedule by a full year, and reduced environmental impacts to the area by eliminating the need to regrade the access road and by reducing heavy concrete truck traffic to the site. Use of a micropile foundation also shortened construction time from two years to eight months. Additionally, Butte County contracted with H&K to provide the construction management, engineering oversight, and special inspection services for this project.
This project was a triple award winner, receiving the 2013 Geotechnical Project of the Year Award from the Sacramento Section of the American Society of Civil Engineers (ASCE); the 2014 Merit Award from the Sierra Chapter of the American Council of Engineering Companies (ACEC); and the 2013 Structures Project of the Year Award from the Sacramento Chapter of the American Public Works Association (APWA). Total Running Time = 4′ – 08″