Page 7 - Vol40 No3 Sept-Oct2022

and reducing inflow and infiltration maintenance needs and the associated slightly larger, with a capacity of 5 million
from rainwater and groundwater. The costs. gallons and a height of 49 feet.
team employed three rehabilitation Both new wet weather storage facilities
technologies: cured-in-place pipe lining, Increasing Conveyance Capacity give the wastewater collection and
pipe bursting and manhole rehabilitation. The second phase of the program transmission system an offline storage
The team installed cured-in-place pipe called for two conveyance improvement facility that can hold excess wastewater
(CIPP) lining to rehabilitate 32 miles of projects, designed to enable Springfield’s during high flow rates, using a diversion
sewer lines. A cost-effective, trenchless accommodation in population growth structure, including gates, a baffle wall
method that causes less impact on the and its resulting increased need for public and a weir that was built on top of the
surrounding environment than the sewer service. The first project upsized interceptor sewer. When the water level
traditional “dig and replace” excavation 10,000 linear feet of sewer lines with new rises above the top of the weir, it is
method, CIPP liner’s tight-fitting, jointless piping ranging in diameter from 8 inches pumped into the storage tank and held
and corrosion-resistant protective cover to 18 inches. The project also included a there until the flow subsides. Then, using
increases the longevity of the system. new pump station and 8-inch force main, gravity, it is drained backed into the sewer
An additional 2.5 miles of sewer line with a capacity of 800 gallons per day, as system for a controlled flow.
were rehabilitated using pipe bursting, well as 58 new manholes and 68 sewer
a method that pulls a new pipe of the services. The second project upsized Significant Improvement
same size or larger through the existing 18,000 linear feet of sewer line with new The City of Springfield has met all
sewer to simultaneously break the existing piping ranging from 8-inch to 24-inch the requirements to fulfill the EPA’s
pipe while replacing it. A trenchless diameter. administrative order on consent, and
rehabilitation method, pipe bursting Adding Additional Storage was awaiting final approval this summer.
does not produce the same amount of The third phase of the program called With more than 52 miles of rehabilitated
surface disruption as traditional sewer for additional temporary wastewater sewer lines, two new storage tanks
replacement methods. storage for times when peak flows exceed and nearly 1,000 improved manholes,
The team also rehabilitated nearly what the sewer system can handle. The Springfield now has the ability to handle
1,000 manholes, repairing minor holes facility, located along the Carr Creek increased demand for decades to come,
and cracks with cement plugs, coating interceptor sewer, has a capacity of 4 while also creating a more sustainable
with epoxy or a hybrid polymer to million gallons and stands 34 feet tall, and healthier environment for the greater
improve structural integrity and reducing while the Sulphur Fork Creek facility is community.

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