HRWA water treatment plant
Clean-in-place tank
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The Huron Regional Water Authority (HRWA) Water System Improvements project received
an Honorable Mention from the American Society of Civil Engineers Michigan Section for
their Quality of Life Award. HRWA, formed by the City of Bad Axe and Village of Port
Austin, constructed a new 1.90 MGD water treatment plant, transmission main and booster
stations to serve the area’s 4,000 full-time and seasonal residents. Cooperation
and coordination were critical to forming the authority, selecting the plant site and
completing the $13.4 million project.
The treatment process features microfiltration technology that ensures compliance
with the Enhanced Surface Water Treatment Rule. The 15,600-square-foot facility
includes infrastructure for raw water supply, pumping, disinfection, storage,
laboratory and administrative facilities. The plant is expandable to 3.80 MGD
to meet future needs.
Raw water is collected from a buried intake located approximately 2,500 feet out
into Lake Huron where it is pumped from a wet well into the treatment facility. The
flow travels through mechanical strainers to the microfiltration unit where it is
converted to permeate water. The microfiltration units are backwashed twice an hour
to remove debris from the filters. A clean-in-place (CIP) process is also completed
on the filters once a month where chemical additives are used to clean the filters.
Permeate water from the microfiltration units is then chlorinated and stored on
site in a 566,000-gallon ground storage tank.
Treated water is pumped to the Port Austin and Bad Axe distribution systems via a
new 20-inch diameter transmission main that was constructed south of the plant
through Village streets and along M-53 to Bad Axe. Three booster stations were
located along M-53 to increase pressure as the water is pumped to Bad Axe, overcoming
nearly 140 feet of ground elevation difference. Control valve and metering structures
are near the plant to connect the transmission main to the existing distribution system.
Integrated SCADA and security systems connect all of the booster stations and elevated
storage tanks to remote terminals in Port Austin and Bad Axe via radio telemetry.
Wade Trim provided conceptual, design, and construction phase engineering services for
the project. Wade Trim also provides full-contract operation, maintenance and management
of the plant.
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