Kingsbury Creek Erosion Project
South St. Louis Soil & Water Conservation District
Basin Program Funds:
Accelerated erosion is continuing on a high, steep slope along Kingsbury Creek
that discharges into the St. Louis Bay, despite the implementation of erosion
control efforts, including re-vegetation of the slope in 1991. Erosion and groundwater
seepage problems have prevented successful re-vegetation of the slope. The slope
that requires stabilization is approximately 100 feet high and 100 feet wide
with an estimated annual soil loss of 500 tons. This soil loss figure was estimated
by measuring the changes of the slope over the past 30 years using historical
aerial photography. The St. Louis River Basin Remedial Action Plan has identified
sedimentation into the bay to be impairing beneficial uses.
The Kingsbury Creek Erosion Project is a cooperative effort between the Minnesota
Department of Transportation, the city of Duluth, and the South St. Louis County
Soil and Water Conservation District. The goals of the program were to stabilize
a high, steep slope to control erosion and sedimentation into Kingsbury Creek
which discharges into St. Louis Bay and Lake Superior. The project developed
innovative techniques to install tile lines used to intercept groundwater seepage.
An information and education program was also developed. The construction results
will be presented to the St. Louis River Basin Remedial Action Plan committee
and at regional and local technical conferences. Additionally, the project will
include photographic monitoring of the slope for three years after completion.
In 1994, the project was not initiated due to insufficient staff and equipment
capabilities in the Minnesota Department of Transportation. When the contract
perspective bids were finally let, the bids were too high. The second submission
for bids generated a bid that fell within the allotted amount. The work was
completed as required in December 1995; however, in the spring of 1996, severe
storms caused the bank to fail in two locations. The contractor was required
to fix the problem under a change order, issued by the city engineer. The final
work was completed on October 31, 1996.
Soil erosion has been reduced by 400 to 425 tons per year as a result of the
Contact: South St. Louis SWCD, (218) 723-4876