Underground Construction - August 2018 - 7

HED: Hawaii's Groundbreaking
$375 Million Wastewater Project
Unveiled
Following a U.S. Environmental Protection Agency Consent Decree
to improve Windward Oahu's sewage collection and treatment
system by June 2018, Brown and Caldwell worked with the city
and county of Honolulu and its construction partners to deliver the
Kaneohe-Kailua Wastewater Conveyance and Treatment Facilities
Project on an accelerated schedule and within budget.
The solution involved connecting the Kaneohe Wastewater
Pre-Treatment Facility (KWWPTF) to the Kailua Regional Wastewater Treatment Plant (KRWWTP) via a 3-mile long, 10-foot
diameter gravity sewer tunnel, increasing the region's wastewater
conveyance and storage capacity while reducing overflows. The
tunnel conveys wastewater by gravity flow, sloping from a 39-foot
depth below ground level at the KWWPTF down toward the
KRWWTP, ending at 77-feet below ground level. Traveling under
Oneawa Hills was the preferred tunnel route, rather than placing
a force main through Kaneohe Bay, thereby avoiding potential
catastrophic sewage overflows into the environmentally sensitive
public resource.
To lift the wastewater to the surface for treatment, a 45-milliongallon-per-day (MGD) Tunnel Influent Pump Station was designed
by Brown and Caldwell and constructed at the KRWWTP. The
project also included a new 15-MGD replacement for the existing
Kailua Influent Pump Station, generator and headworks buildings,
and odor control facilities.
"This first-of-its-kind project in Hawaii is one the entire community can be proud of," said Mayor Kirk Caldwell. "Our team has
created a world-class sanitation facility that will last for generations, while also protecting the environment that's so important to
our island lifestyle."
Another significant benefit of the project is reduced energy
consumption. Wastewater conveyance via the new tunnel system
occurs through gravity flow rather than pressure, eliminating
three upstream pump stations and a 3-mile long force main, all
considered potential community overflow points.
Headquartered in Walnut Creek, Calif., Brown and Caldwell is a
full-service environmental engineering and construction firm with
45 offices and more than 1,600 professionals across the country.

Training Program Prepares Operators
for Vacuum Excavation Projects
As vacuum excavators expand use beyond horizontal directional
drilling (HDD) job sites to other industrial applications such as microtrenching, operators require new technology, tools and information.
Ditch Witch, a Charles Machine Works Company, introduced the
Certified Vacuum Excavation Training program to help both novice and
experienced operators maintain performance and safety when using
vacuum excavators on today's diverse projects.
"With our new vacuum excavation training courses, operators
will receive an advanced education to safely and effectively use the
machines for new and traditional applications,´ said Greg Wolfe, Ditch
Witch director of training. "We're excited for what's next in preparing
our crews for today's diverse jobsites, and the new training program is
a great complement to our existing offering of HDD courses."
The program features a series of industry-leading courses that provide the most comprehensive vacuum excavation training instruction
on the market today. And, as vacuum excavation technology continues
to evolve, it's designed to educate both novice and expert operators
on new machine functionality and applications. Each course provides
detailed information on a subject related to vacuum excavation,
including machine operation best practices, safety procedures, tooling
selection and advanced equipment controls.
Participants can complete the entire program online anytime, anywhere and at their own speed, from a computer or smart device. Users
can take the courses at their own speed and return to any course, as
needed. After all courses are fully completed, participants can print an
official Ditch Witch Certified Training certificate.
In addition to the online courses, crews have the option to work
with their local Ditch Witch dealer to participate in an instructor-led
classroom course, dealer-site training on the equipment, or receive
training on the actual job site.
The training program is part of the full suite of Ditch Witch productivity tools - including Parts Lookup, Orange Intel and HDD Advisor
- available through the customer's MyDitchWitch online account, with
a single login to consolidate all customer engagement tools in one
location.
FOR MORE INFORMATION
Ditch Witch, (800) 654-6481, ditchwitch.com
UConOnline.com | AUGUST 2018

7
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Underground Construction - August 2018

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