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Ballard Island, State of Illinois
Local farmers showed strong support for TMT efforts and received 20,000 cubic yards of valuable topsoil from the operations. Officials of the IDNR commented that the Eddy Pump would change the way silt and other materials are removed from river and lake basins, and make wholesale dredging cost-effective for recreational and environmental purposes. During the operation solid transfer rates of 25% to 80% were achieved at pumping rates well above 1000 gallons per minute. Navigation channels for local boaters were completed and marked by the TMT crew. Conclusions:
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TMT’s Tornado 2 dredge, outfitted
with a 6-inch Eddy Pump, successfully dredged
20,000 cubic yards of uncontaminated sediments
from the Illinois River south of Ballard’s
Island. More than 67,000 acres of Illinois
River backwaters, that once were six to seven
feet deep, now average 18 inches in depth,
and will require dredging in coming years.
The project, performed for the Illinois Department
of Natural Resources (IDNR), was a test of
the feasibility of completing the necessary
dredging in the future, as well as an assessment
of Eddy Pump performance for removing and
transporting sediments.