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Levee work underway
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September 18, 2012 |
Repairs to the Bonners Ferry levee started
Monday as U.S. Army Corps of Engineers'
officials began work to rebuild two damaged
segments totaling approximately 350 feet on the
Kootenai River's left bank at Bonners Ferry.
The $179,500 project includes rebuilding damaged
sections and installing erosion protection along
two sites originally damaged during a May-June
2011 flood event which reduced flood defense
from a 20-year flood protection level to just a
two-year level. Under a cost-share agreement,
the Corps pays for 80 percent of the project and
Boundary County picks up the remaining 20
percent.
Site repairs span 300 feet and 50 feet along the
respective segments and involve filling voids
with two-to four-inch quarry spalls, placement
of a quarry spalls blanket and adding riprap
armor. In addition, willow plantings and hydro
seeding are included in the design to offset
construction impacts.
Construction is expected to be complete by the
end of September and will restore the levee to
its pre-flood level of protection.
The Corps coordinated with multiple agencies
during the planning, design and construction
phases, including Boundary County, U.S. Fish and
Wildlife Service, the Environmental Protection
Agency, Idaho Department of Fish and Wildlife,
Idaho Department of Environmental Quality, the
Kootenai Tribe of Idaho and the Idaho State
Historical Society.
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