Designed by Brown and Caldwell, an environmental engineering and construction firm, Hawaii’s largest ever wastewater system upgrade has been officially completed.
The upgrade improves Windward Oahu’s sewage collection and treatment system by connecting the Kaneohe Wastewater Pre-Treatment Facility (KWWPTF) to the Kailua Regional Wastewater Treatment Plant (KRWWTP) via a three-mile long, 10-foot diameter gravity sewer tunnel. Wastewater flows via gravity from a depth of 39-feet below ground level at the KWWPTF to a depth of 77-feet below ground at the KRWWTP. The route travels under the Oneawa Hills in order to avoid Kaneohe Bay and any sewage overflows into the environmentally sensitive public resource.
Brown and Caldwell also designed a 45 million gallons per day Tunnel Influent Pump Station to lift wastewater to the surface for treatment at KRWWTP. The project also includes a new 15 million gallons per day replacement for the existing Kailua Influent Pump Station, a generator and headworks buildings, and odor control facilities.
Because the new tunnel system conveys wastewater via gravity rather than pressure, three upstream pump stations and a three-mile long force main (all potential community overflow points) were able to be eliminated.
Related Stories
| Jul 23, 2014
Architecture Billings Index up nearly a point in June
AIA reported the June ABI score was 53.5, up from a mark of 52.6 in May.
| Jul 21, 2014
Economists ponder uneven recovery, weigh benefits of big infrastructure [2014 Giants 300 Report]
According to expert forecasters, multifamily projects, the Panama Canal expansion, and the petroleum industry’s “shale gale” could be saving graces for commercial AEC firms seeking growth opportunities in an economy that’s provided its share of recent disappointments.
| Jul 18, 2014
Contractors warm up to new technologies, invent new management schemes [2014 Giants 300 Report]
“UAV.” “LATISTA.” “CMST.” If BD+C Giants 300 contractors have anything to say about it, these new terms may someday be as well known as “BIM” or “LEED.” Here’s a sampling of what Giant GCs and CMs are doing by way of technological and managerial innovation.
| Jul 18, 2014
Top Construction Management Firms [2014 Giants 300 Report]
Jacobs, Barton Malow, Hill International top Building Design+Construction's 2014 ranking of the largest construction management and project management firms in the United States.
| Jul 18, 2014
Top Contractors [2014 Giants 300 Report]
Turner, Whiting-Turner, Skanska top Building Design+Construction's 2014 ranking of the largest contractors in the United States.
| Jul 18, 2014
Engineering firms look to bolster growth through new services, technology [2014 Giants 300 Report]
Following solid revenue growth in 2013, the majority of U.S.-based engineering and engineering/architecture firms expect more of the same this year, according to BD+C’s 2014 Giants 300 report.
| Jul 18, 2014
Top Engineering/Architecture Firms [2014 Giants 300 Report]
Jacobs, AECOM, Parsons Brinckerhoff top Building Design+Construction's 2014 ranking of the largest engineering/architecture firms in the United States.
| Jul 18, 2014
Top Engineering Firms [2014 Giants 300 Report]
Fluor, Arup, Day & Zimmermann top Building Design+Construction's 2014 ranking of the largest engineering firms in the United States.
| Jul 18, 2014
Top Architecture Firms [2014 Giants 300 Report]
Gensler, Perkins+Will, NBBJ top Building Design+Construction's 2014 ranking of the largest architecture firms in the United States.
| Jul 18, 2014
2014 Giants 300 Report
Building Design+Construction magazine's annual ranking the nation's largest architecture, engineering, and construction firms in the U.S.
