Since the beginning of the Chippewa Flood Control System, and
during the past twenty-five years, much of the needed maintenance
could not be completed as planned due to lack of funding. This
caused many of the channel banks to become overgrown with woody
vegetation, which made it near to impossible to maintain the banks
or the culverts installed for the purpose of draining the floodwaters.
In addition, as trees grew, many would lose branches or fall into
the channel causing log jams, bank erosion, and more localized
areas of flooding due to the inability of the stream flow to get
through the blockage.
Maintaining the 33 miles of channel helps to ensure that flood
waters will recede from the land, quickly and efficiently.
During the past ten years, an effort by the Chippewa Subdistrict
has been made to provide funding through an assessment permitted
by the Conservancy District Laws of Ohio.
These assessment dollars, which can only be spent on maintenance
of the Chippewa Flood Control Project, have been utilized on several
projects designed to return the Project to its original design
*For activities prior to 2005, contact
Maintenance Activities must be done consistently to keep
the Flood Control System working properly. Dams and channels must
be mowed annually to manage woody growth, and provide access to
allow for equipment and inspections. For an example of maintenance,
visit the repair to Dam VIII-C
When the Chippewa channel was constructed, nearly 500 pipe structures
were installed. These structures used corrugated metal pipes (CMP),
which vary in diameter and length, and are an integral part of
the System as they move runoff water safely into the channel.
The CMP pipes have exceeded their lifespan and are being systematically
replaced with superior quality pipe, such as high density polypropylene
(HDPP) or high density polyethylene (HDPE). These new pipes are
intended to last for many decades.
Special Projects vary each year and involve items of work
that are outside the usual scope of maintenance. They are necessary
to keep pace with new standards and regulations, as well as changes
in the Watershed
Our GPS / GIS mapping is a
Special Project allowing us to locate and evaluate nearly 700
hydraulic structures originally installed throughout the channels.
When completed, Subdistrict staff will be able to prepare a proactive
maintenance schedule to ensure that structures are repaired or
replaced before failure occurs.