Lagoon Renovation
Mandates from the DNR - The Iowa Department of
Natural Resources - required the City of Norway to
update its existing sanitary sewer system.
The City Council engaged the engineering firm
of Snyder & Associates to design a new system.
Once the DNR approved our plan to use a system
created by NitrOx, - a cold-weather ammonia
removal system - to bring our sanitary sewer into
compliance with State mandates. Bids were
sought from qualified contractors, and in October
of 2017, the bid of $2,285.000 was accepted
from Boomerang.
Work at the Lagoon started in late April of 2018,
and by June, tons of earth had been moved and
scores of yards of concrete had been poured.
From July of 2018, to the end of March 2019,
work on the project proceeded sporadically; then
work began on installing our new 15” main
sewer line to connect the City to the Lagoon.
During April and May of 2019, most of the new
main sewer line was installed and much of the
electrical wiring and controls were installed at
the lagoon.
By early June of 2019, the new sewer line had
been connected; later that month, two new pumps
were installed at the Lagoon’s Lift Station.
The lagoon was dredged of sludge in November
of 2019, and the renovation of the old lagoon
proceeded; required ground work also began.
December weather allowed for the new aeration
system to be in installed and the lagoon operation
was up and running.
The new lagoon baffle curtain was installed in
the first week of January and all that remains to
be done is some ground work and grass seeding.
Starting Point
Lagoon Renovation Slideshow (April 2018 to December 2019)