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Section 319
NDNPDINT SOURCE PROGRAM SOCHSf! STORY
Dam Modification Project Helps Restore Water Quality in the
Middle Cuyahoga River
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~^^e ^ent ^am on Ohio's Middle Cuyahoga River was a barrier to
fish migration and contributed to water quality problems due to
stagnant flows within the dam pool, preventing the river from meeting its designated use for
warmwater habitat (WWH). As a result of modifications to the dam that restored a free flowing
river channel and other activities implemented both above and below the dam, the Cuyahoga
River is now meeting the full attainment of its WWH aquatic life use designation, and it is
expected to be removed from the state's 303(d) list of impaired waters in the next listing cycle.
Problem
In 1999 the Ohio Environmental Protection
Agency (Ohio EPA) completed a total maxi-
mum daily load (TMDL) study on the Middle
Cuyahoga River that found the river was only
partially attaining objectives for its WWH
designation. In 2000 it was placed on the
state's 303(d) list as impaired by nutrients,
siltation, low dissolved oxygen, flow alteration,
and other habitat alteration. Major sources of
impairment included municipal point sources,
combined sewer overflows, septic systems,
urban runoff, channelization, and dam con-
struction. The TMDL indicated that point
source regulation alone would be insufficient to
achieve water quality goals within the river and
recommended the modification or removal of
dams in the cities of Kent and Munroe Falls.
Ohio EPA determined that the Kent Dam was
contributing to water quality problems due to
stagnant flows and eutrophication within the
dam pool, causing dissolved oxygen levels to
fall well below water quality criteria during peri-
ods of low flow. The dam pool altered aquatic
habitat, impairing both the health and diversity
of indigenous fish species. Additionally, the
dam posed a physical barrier to fish migration.
The dam pool was eliminated by removing an old canal
lock and allowing the river to return to free-flowing
conditions.
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Project Highlights
Ohio EPA Kent Dam Pool Bio-Survey Data
The Middle Cuyahoga River Restoration Project
required consideration of complex science
and engineering, cultural and archaeologi-
cal sensitivity, regulatory finesse, and public
involvement. The Kent Dam project initially
faced fierce public resistance due to the dam's
historic value and location in a designated his-
toric district. The dam itself was listed on the
National Register of Historic Places because
it was one of the first recorded arched dams
constructed in the United States.
An independent committee composed of the
general public and various local, state, and
federal representatives determined that the
dam could be successfully modified without
destroying its historic character. The project
involved removing an old canal lock east of the
dam to provide for a free-flowing river channel,
while at the same time preserving and restoring
the arched dam structure. The former dam pool
area was converted into Heritage Park, and
extensive interpretative signage chronicles the
history of the area as well as the environmental
benefits of the project. To further restore water
quality and aquatic habitat, the project incor-
porated extensive natural stream channel and
streambank restoration above the dam.
Results
Prior to the project, the Index of Biological
Integrity (IBI)—an objective measurement of
the diversity of the fish community—indicated
that fish life within the river failed to meet
WWH standards. Physical habitat conditions
within and along the river were measured using
the Qualitative Habit Evaluation Index (QHEI)
and also failed to meet WWH standards.
Following completion of the Middle Cuyahoga
Restoration Project, IBI scores within the Kent
Dam area increased by 57 percent and QHEI
scores increased by 56 percent. Modified
Index of Well Being (MiWb) scores—used to
IBI
MiWb
QHEI
Pre-Construction
28.0
8.2
51.0
Post-Construction
44.0
8.9
79.5
WWH Criteria: IBI > 40; MiWb > 7.9; QHEI > 60
measure the general health offish communi-
ties within a waterbody—increased slightly
from 8.2 to 8.9. As a result, the Cuyahoga River
fully attained its WWH aquatic life use desig-
nation, and it is expected to be removed from
the state's 303(d) list of impaired waters in the
next listing cycle.
As an additional benefit, the city of Kent saved
several million dollars in wastewater treatment
upgrades that otherwise would have been
required to address impairments caused by the
dam. Developing the city of Kent's Heritage
Park in the former dam pool also preserved
an important connection to Ohio's history.
Continued water quality improvements are
expected upon the completion of additional
projects such as modification of the dam
downstream at the city of Munroe Falls.
Partners and Funding
The city of Kent, in partnership with the cities
of Ravenna and Massillon, Summit County,
and agencies such as the U.S. EPA, Ohio EPA
and Ohio Department of Natural Resources
(ODNR), secured more than $5 million for the
Kent Dam Project. Funding was provided as
follows: Ohio EPA's Clean Water Act (CWA)
State Revolving Loan Fund's Water Resource
Restoration Sponsor Program—$3.94 million;
The Clean Ohio Fund—$636,000; CWA
section 319 Grant—$500,000; and ODNR—
$6,400. The section 319 grant funds were used
to restore degraded and exposed streambanks
following removal of the dam pool.
I
5
Q
'. U.S. Environmental Protection Agency
\ Office of Water
a Washington, DC
EPA841-F-05-004Y
October 2005
For additional information contact:
Russ Gibson
Ohio Environmental Protection Agency
614-644-2020
russ.gibson@epa.state.oh.us
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