Aug 23, 2017

Honolulu Upgrades Sewer System

$85.7 million sewer rehabilitation project to begin summer 2018

Honolulu updates sewers

Honolulu, Hawaii, announced an $85.7 million sewer rehabilitation project in Nuuanu Valley. 

According to a draft environmental assessment released in July, the two mains that transport sewage from the area—the Waolani Stream Sewer and the Nuuanu Stream Sewer—no longer have the capacity to support homes in Nuuanu Valley.

The project, known as the Dowsett Highlands Relief Sewer, will add a larger pipe down the Pali Highway and Nuuanu Avenue to relieve those two sewer mains, Markus Owens, a spokesman for the city department of environmental services, wrote in an email.

“The main reason for this project is to reduce the risk of sanitary sewer overflows in this area,” Owens said.

A total of 12.1 million gal of sewage per day could be diverted from the two sewer lines to the new relief line. There also are plans for smaller relief lines on Laimi Road, Ahi Place, Jack Lane, Wyllie Street and Pelekane Drive according to the draft assessment.

Final designs for the sewer project should be completed later this year, with bids going out in February of 2018. Construction is expected to start in April 2018, according to the draft environmental assessment.

The project must be completed before June 30, 2020, to comply with a court-approved decree from the U.S. Environmental Protection Agency.

Read more about the project. 

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