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
Industrial Facilities | Mar 26, 2018
thyssenkrupp’s new Zhongshan plant includes a high-speed test tower
The 813-foot test tower has 13 shafts.
Reconstruction & Renovation | Feb 7, 2018
Renovations begin on an underground facility that is investigating the nature of dark matter
This LEO A DALY-designed project makes way to produce the world’s most sensitive detector to this point.
Industrial Facilities | Jan 15, 2018
New Dollar General distribution center planned for Longview, Texas
The facility will be the discount retailer’s second in Texas and 17th overall.
Industrial Facilities | Jan 10, 2018
Kraft Heinz meat processing and packaging facility occupies 70 acre plot in Davenport, Iowa
The facility is the first Greenfield construction project for the Kraft Heinz Company since the merging of Kraft Foods Group and H.J. Heinz Company in 2015.
Giants 400 | Nov 2, 2017
Top 80 industrial construction firms
Walbridge, Jacobs, and Fluor top BD+C’s ranking of the nation’s largest industrial sector contractors and construction management firms, as reported in the 2017 Giants 300 Report.
Industrial Facilities | Nov 1, 2017
Top 45 industrial engineering firms
AECOM, Fluor, and CRB top BD+C’s ranking of the nation’s largest industrial sector engineering and EA firms, as reported in the 2017 Giants 300 Report.
Giants 400 | Nov 1, 2017
Top 35 industrial architecture firms
Jacobs, Stantec, and BRPH top BD+C’s ranking of the nation’s largest industrial sector architecture and AE firms, as reported in the 2017 Giants 300 Report.
Multifamily Housing | Sep 20, 2017
New housing development rises from a historic textile mill’s ashes
Loft Five50 will add 137 housing units to Lawrence, Mass.
Industrial Facilities | Sep 13, 2017
TRUMPF’s ‘smart factory’ is a factory and showroom in one
The new facility is located in Hoffman Estates, Ill., not far from Chicago O’Hare International Airport.
Industrial Facilities | Aug 29, 2017
Clayco completes construction on Georgia-Pacific Distribution Center
The new facility expands on the company’s old distribution facility by over 300,000 sf.
