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Section 319
NONPOINT SO
RAM SUCCESS STORY
Improvement of Surface and Ground Water Quality
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median number of fish caught in 1998 was
637, compared to 299 in 1990. The increase
in these parameters improved the IBI scores
for Lake Creek to the degree necessary to
fulfill the state biological criteria in support of
the FWP beneficial use. Additionally, samples
of Lake Creek water and sediment failed to
exhibit any toxicity using the same tests that
had demonstrated toxicity in 1990. Because of
these results, Oklahoma removed Lake Creek
from the 303(d) list for unknown toxicity and
pesticides in 2002.
Lake Creek Fish Bioassessment
Partners and Funding
Many groups contributed to the success of this
project. Crucial educational efforts were led by
the Oklahoma Cooperative Extension Service
and the Oklahoma Department of Agriculture
(now Oklahoma Department of Agriculture,
Food and Forestry) with the participation
of the other agencies. EPA section 319
funds provided $280,441, while the State of
Oklahoma supplied $186,961 toward the Lake
Creek project.
24
23
22
£! 21
8
OT
520
19
18
17
16
Fully Supporting
Undetermined
Not Supporting
1990 1998
Fish bioassessment results from 1990 and
1998. Circles represent the IBI scores of fish
collections at two sites in Lake Creek; diamonds
indicate the average IBI score of the two sites.
The improvement in these parameters resulted
in an average IBI score that justified delisting
(Oklahoma biocriteria allows pooling of data
from multiple sites when they lie within the
same reach).
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111
U.S. Environmental Protection Agency
Off ice of Water
Washington, DC
EPA841-F-07-001E
April 2007
For additional information, contact:
Dan Butler
Oklahoma Conservation Commission
405-522-4500
dan.butler@conservation.ok.gov
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