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
| Sep 19, 2013
6 emerging energy-management glazing technologies
Phase-change materials, electrochromic glass, and building-integrated PVs are among the breakthrough glazing technologies that are taking energy performance to a new level.
| Sep 19, 2013
Roof renovation tips: Making the choice between overlayment and tear-off
When embarking upon a roofing renovation project, one of the first decisions for the Building Team is whether to tear off and replace the existing roof or to overlay the new roof right on top of the old one. Roofing experts offer guidance on making this assessment.
| Sep 11, 2013
BUILDINGChicago eShow Daily – Day 3 coverage
Day 3 coverage of the BUILDINGChicago/Greening the Heartland conference and expo, taking place this week at the Holiday Inn Chicago Mart Plaza.
| Sep 10, 2013
BUILDINGChicago eShow Daily – Day 2 coverage
The BD+C editorial team brings you this real-time coverage of day 2 of the BUILDINGChicago/Greening the Heartland conference and expo taking place this week at the Holiday Inn Chicago Mart Plaza.
| Aug 30, 2013
Local Government Report [2013 Giants 300 Report]
Building Design+Construction's rankings of the nation's largest local government design and construction firms, as reported in the 2013 Giants 300 Report.
| Aug 30, 2013
State Government Report [2013 Giants 300 Report]
Stantec, Jacobs, PCL Construction among nation's top state government design and construction firms, according to BD+C's 2013 Giants 300 Report.
| Aug 28, 2013
Federal Government Report [2013 Giants 300 Report]
Building Design+Construction's rankings of the nation's largest federal government design and construction firms, as reported in the 2013 Giants 300 Report.
| Aug 27, 2013
Industrial Sector Report [2013 Giants 300 Report]
Building Design+Construction's rankings of the nation's largest industrial sector design and construction firms, as reported in the 2013 Giants 300 Report.
| Aug 26, 2013
What you missed last week: Architecture billings up again; record year for hotel renovations; nation's most expensive real estate markets
BD+C's roundup of the top construction market news for the week of August 18 includes the latest architecture billings index from AIA and a BOMA study on the nation's most and least expensive commercial real estate markets.
| Aug 22, 2013
Energy-efficient glazing technology [AIA Course]
This course discuses the latest technological advances in glazing, which make possible ever more efficient enclosures with ever greater glazed area.
