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Posted on September 5, 2017 at 4:53 PM by Ryan Hiniker
Drainage update 9/5/2017
Upcoming Drainage Hearings or Meetings:
JD09 (Northern and Southern Petitions) Official bid awarding will be
part of the September 12, 2017, Board of Commissioners meeting.
JD34 Official bid awarding will also be held on September 12, 2017, at
the Board of Commissioners meeting.
More information on the board meeting will be posted on the county's website once the agenda is finalized.
We (Blue Earth County Drainage
Authority) are joining forces with Waseca County to help stop the spreading of
invasive carp species. Bighead, silver
and Grass Carp are three types of invasive carp species that are quickly making
their way into many waterways in southern Minnesota. Silver Carp are also known as the jumping carp,
that jump out of the water when they are stressed by noise or vibration.
Our two counties are working with the DNR
(Department of Natural Resources) to slow this spread of carp. Invasive carp have been found in the Minnesota
River near New Ulm. The Minnesota River has
a direct connection to the Le Sueur River.
Madison Lake and Elysian Lake watersheds are directly connected to Le
Sueur River. Think of how quickly they
could spread from our larger lakes to smaller streams and lakes. The DNR has come up with a plan of action to
help slow the spreading of these invasive carp species. Electric fish barriers are being installed in
two separate locations to help prevent the spreading of carp to both the
Madison Lake and Elysian Lake watersheds.
The electric fish barriers send an
electronic current through the water that immobilizes the carp that are trying
to swim upstream. The immobilized fish
then floats back downstream. This is a
fairly new practice for the DNR, but they have had good success using this same
system on other areas of the state, including Jackson County. The fish are temporally immobilized by the
electrical current. There will be one of these structures installed on the
upstream side of the bridge crossing over the Mayhew Creek (JD11 ditch) on the
east side of the bridge. The east side
of the bridge is actually Waseca County, but after much engineering by the DNR,
the site was chosen.
This fish barrier structure is possible through an agreement
with the DNR and the landowner where the concrete structure will be
built. There is concrete poured that has
electric rods that will emit electricity through the water stopping the fish
from swimming upstream. The DNR doesn’t
have a long history of how effective these electric barriers systems are,
but they are very hopeful that this will be yet another tool in the toolbox for
slowing down or stopping the migration of these invasive carp species.
The carp actually do a lot of damage to the
ecosystem of a lake or watershed. They
stir up the mud on the bottom and breed intensely, almost choking out other
fish species. The structure will not affect
the flow of the creek or drainage system, just hopefully stop the invasive carp
from spreading. Picture one is the
approximate site map of the new proposed structure. Picture two is an example of what a similar
electric fish barrier structure may look like.
Example of electric fish barrier.
Recent Drainage Inspections – week of August 28 – September 1:
Please call with issues you observe on our
public drainage system, as there is a lot of open ditch and tile in our county
and only two of us in the drainage department. We will do our absolute
best to service your issues and concerns as we receive them.
We require that all repairs to a county
drainage system (tile or open ditch) be authorized by one us in the drainage
office, either Craig or myself, before any repairs are made.
Drainage Management Specialist