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
| Dec 2, 2014
Nonresidential construction spending rebounds in October
This month's increase in nonresidential construction spending is far more consistent with the anecdotal information floating around the industry, says ABC's Chief Economist Anirban Basu.
Sponsored | | Nov 6, 2014
Drilling deeper: On the ground insights from the Marcellus Shale region
The Marcellus Shale region is expansive, stretching from upstate New York through Pennsylvania to West Virginia. It’s an exciting time to live and work in the area. SPONSORED CONTENT
| Oct 27, 2014
Davis, Calif., latest city to join race to develop 'innovation hubs'
The city plans to develop two "innovation centers" with a total of seven million sf of commercial space geared for local research and technology companies.
| Oct 16, 2014
Perkins+Will white paper examines alternatives to flame retardant building materials
The white paper includes a list of 193 flame retardants, including 29 discovered in building and household products, 50 found in the indoor environment, and 33 in human blood, milk, and tissues.
| Oct 15, 2014
Harvard launches ‘design-centric’ center for green buildings and cities
The impetus behind Harvard's Center for Green Buildings and Cities is what the design school’s dean, Mohsen Mostafavi, describes as a “rapidly urbanizing global economy,” in which cities are building new structures “on a massive scale.”
| Oct 14, 2014
Slash energy consumption in data centers with liquid-based ‘immersive-cooling’ technology
A new technology promises to push the limits of data center energy efficiency by using liquid instead of air to cool the servers.
| Oct 12, 2014
AIA 2030 commitment: Five years on, are we any closer to net-zero?
This year marks the fifth anniversary of the American Institute of Architects’ effort to have architecture firms voluntarily pledge net-zero energy design for all their buildings by 2030.
| Oct 9, 2014
Beyond the bench: Meet the modern laboratory facility
Like office workers escaping from the perceived confines of cubicles, today’s scientists have been freed from the trappings of the typical lab bench, writes Perkins+Will's Bill Harris.
| Oct 1, 2014
4 trends shaping the future of data centers
As a designer of mission critical facilities, I’ve learned that it’s really difficult to build data centers to keep pace with technology, yet that’s a reality we face along with our clients, writes Gensler's Jackson Metcalf.
| Sep 24, 2014
Architecture billings see continued strength, led by institutional sector
On the heels of recording its strongest pace of growth since 2007, there continues to be an increasing level of demand for design services signaled in the latest Architecture Billings Index.
