Presented by Melanie Williams. Plan Schedule Water Quality Status Trends Chain of Lakes Basinwide...
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Transcript of Presented by Melanie Williams. Plan Schedule Water Quality Status Trends Chain of Lakes Basinwide...
Request to Proceed for Approval of the
2010 Catawba River Basin Plan
Presented by Melanie Williams
Plan Schedule
Water Quality Status
Trends
Chain of Lakes
Basinwide Issues
Recommendations & goals
Public Review Comments
2010 Catawba River Basin Plan
Catawba Plan Schedule
Internal Review: April 15 – May 7, 2010
Public Review: May 18 – June 18, 2010
WQC: July 14, 2010
EMC: September 2010
Impaired Waters
2010 Impaired Waters in Red
Between 2004 Plan and 2010 Plan:• Removed from Impaired Waters List:
23.6 miles4,895.1 acres
• Added to Impaired Waters List:226 miles1,937 acres
Biological Rating Trends
Excellent Good Good-Fair Fair Poor02468
1012141618
4
16
13
8
2
1112 12
7
1
Benthic Macroinvertebrate Com-munity (Bug)
Excellent Good Good-Fair Fair Poor0123456789
8 8
34
0
8 8
2
4
1
Fish Community
Im-proved
36%
No Change
42%
De-clined21%
Biological Community Rating Shifts Between 2002 & 2007
2004 – Green / 2010 – Yellow
# of
Sta
tions
# of
Sta
tions
32 Stations Basinwide
Each monitored monthly
Ambient Monitoring System Stations
Copper
Yearly average values of 32 ambient monitoring stations.
Red Lines: Impaired waters for Copper
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
20070
1
2
3
4
5
6
7Mean
Co
pp
er
(u
g/l
)
% Exceedances Between 2004-
2008Turbidity1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
0
5
10
15
20
25
30By Mean
Tu
rbid
ity
(NT
U)
Red Lines: Impaired waters for Turbidity
Standard: 50 NTU
No Elevated Levels
Fecal ColiformBacteria (FCB)
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
0
20
40
60
80
100
120
FC
B G
eo
mean
(c
olo
nie
s
per
10
0 m
l)% Elevated
Between 2004-2008
Red Lines: Impaired waters for FCB
By Geometric Mean
pH
% of Low pH Exceedances
Between 2004-2008
19971998
19992000
20012002
20032004
20052006
20072008
66.26.46.66.8
77.27.47.67.8
8
Red Lines: Impaired waters for Low pH
pH (
S.U
.)
High pH Standard = 9.0 suLow pH Standard = 6.0 su
By Mean
Catawba Chain of Lakes
Catawba Chain of LakesImpaired Lakes:
Rhodhiss, Mountain Island, Portions of Wylie
Recommendations for Chain:Increase main stem buffer awareness through
educational efforts Collect additional samples within the lakes for
a total of 10 samples in each lakeImplement Action Plans
Lake RhodhissImpaired – High pH (since 2004)21% Nitrogen & 48% Phosphorus from point source
Based on modeling from 2000Optimization Study for three WWTP facilities completed
in Jan. 2009Marion, Morganton & Valdese
Western Piedmont Council of Government Watershed Management Plan - (2009)Nonpoint source: nutrient/sediment reductions
Lake Rhodhiss Action PlanPoint Sources:
3 WWTPs complete pilot study to reduce phosphorusNew permit requirements include…
Effluent monitoring weekly for nutrients Instream monitoring monthly for nutrients
Nonpoint Sources: Implement Watershed Management Plan
Evaluate 2012 monitoring results to determine if TMDL is necessary.
Mountain Island LakeImpaired – Low pH
Recommendation:Special Study in
planning stage
DWQ working with Charlotte-Mecklenburg & Duke Energy
Lake WylieUpper dam to I-85:
Impaired - Low pH
South Fork Stem: Impaired - Copper
1996: Nitrogen/Phosphorus TMDL developed to address high chlorophyll a
Lake Wylie 2010 Recommendations
Mount Holly & Belmont permit limits
Develop Action Plan to better support the TMDLMonitoring PlanReview management areaReview source allocationReview nutrient monitoring requirements
Majors – Effluent weekly Minors – Effluent at least monthly
Other Basinwide IssuesStormwater
Velocity & Volume
On-Site Wastewater Treatment
Buffers on Main Stem
Coal Ash Ponds
Water Quality Improvements & Restoration Work1,311 acres preserved and protected through
the Conservation Easement Fund
40 Ecosystem Enhancement Program (EEP) Projects
Active Soil and Water Conservation DistrictsIrish Creek removed from Impaired Waters List
Local Initiatives
Recommendations & Goals for Upcoming CycleAction PlansCoordinate efforts to plan and implement
local watershed management plansParticipate in analysis of Low pHAssist with fecal coliform bacteria reduction
efforts Support buffer awareness and outreach
effortsConduct/support watershed stressor studies
Public Review Received Comments from:
Duke EnergyCharlotte-Mecklenburg Stormwater ServicesTown of ValdeseThe City of HickoryGaston County Cooperative ExtensionThe Farm BureauCatawba RiverKeeper
Public Review CommentsComment Topics:
Low pHRequests for additional lake samplingSources of CopperTaste & Odor issue in Lakes Rhodhiss and HickoryAgricultural Impacts, Farm Bill effortsNeed for a nutrient strategy for the whole chain of
lakesFull study of coal ash pond impactsStronger recommendations to reduce nutrients in
lakesEvaluate stormwater impacts on lakes
Picture will go here
Request to Proceed to EMC for Approval of the
Final Catawba River Basinwide Water Quality Plan
Questions??