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Maria CreekWatershed TMDL Project
Stakeholder Kickoff MeetingDecember 10, 2019
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Agenda• Watershed Selection Process
and Watershed Approach
• What is a TMDL exactly?
• Watershed Impairments
• Watershed Characterization Monitoring
• Time Frame
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Watershed Selection Process
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What is a watershed?An area of land that drains to a common outlet
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Why Was Your Watershed Chosen?
• Impaired streams on the 303(d) List of Impaired Waters requiring creation of a Total Maximum Daily Load (TMDL)
• Current lack of TMDL or Watershed Management Plan (WMP)
• Active interest shown by local group in development/implementation of a WMP
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Priority Watershed Selection Process
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The Watershed ApproachWater quality problems generally do not begin in the stream.
The watershed approach incorporates:• Point and nonpoint sources (NPS) of water pollution• A problem-solving tool/decision-making model:
– Assessment – Identification– Stakeholder involvement– Implementation
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What Is a Total Maximum Daily Load?
• Identify the pollutant(s) • Determine the current level(s) of the pollutant(s)• Calculate the amount of the pollutant(s) that
a waterbody can receive and still meet water quality standards
A TMDL document is:• A report of pollutant sources, needed reductions,
and actions necessary to improve water quality• A tool to guide watershed planning
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TMDL Source Allocations
50%
5%
40%
5%
Example of TMDL Allocations
Load Allocations
Future Growth
Waste Load Allocations
Margin of Safety
Load Allocations: (Nonpoint Sources)• Agricultural Run-off• Urban Run-off• Leaking/Failing Septic Systems• Natural Background
Wasteload Allocation: (Point Sources)• Wastewater Treatment Facilities • Municipal Separate Storm
Sewer Systems (MS4s)
Margin of Safety Future Growth
TMDL = WLA + LA + MOS
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What Does a Total Maximum Daily Load Report Provide?
• Information - A description of the watershed and the water quality data on the impairment
• Sources - Overview of the potential sources of the pollutant• Loads - The amount of the pollutant of concern that a
waterbody can receive and still meet water quality standards or targets that apply to the watershed
• Reductions - The reduction percentage needed in pollutant loading to meet the water quality standards or targets that apply to the watershed
• Implementation - A tool to guide watershed planning and restoration activities
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Vision: “To restore waters impaired by nonpoint source pollution and maintain water quality in healthy watersheds through locally led partnerships.”
Indiana’s Nonpoint Source Program
Goals of the Indiana Nonpoint Source (NPS) Program Management Plan:• Utilize partnerships • Monitor/assess waters for impairments and improvements• Develop and conduct outreach and education programs• Improve Indiana’s water quality by reducing NPS pollutants• Protect sensitive, vulnerable, and high quality waters
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Watershed Group
Who are stakeholders?– Local decision-makers– Citizens– Agriculture/urban
representatives– Drainage board– Health department
– Business interests– Schools/universities– Neighborhoods– Outdoor groups– Parks department– Builders/developers
A self-sustaining, cooperative group that incorporates the perspectives of stakeholders to address water quality issues and improves the functioning condition of rivers and streams in a watershed.
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Improve Water Quality
Watershed Groupworks with community to develop Watershed
Management Plan
PARTNERSHIP PARTNERSHIPIDEM develops
TMDL Document
Impairments Exist in
Watershed
Watershed Group works with community to
implement Watershed Management Plan
IDEM works with group to get funding
for planning
IDEM works with group to get funding for implementation
Implement TMDL Document
Working Together to Improve Water Quality
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TMDL vs. WatershedManagement Plan (WMP)Similarities
TMDLs and WMPs:• Collect stream data• Identify problems• Identify pollution sources• Recommend (if a TMDL)—
or set (if a WMP)—goals and objectives
DifferencesA TMDL also:• Identifies implementation
areas and recovery potential• Identifies current water
quality actions
A WMP also:• Addresses public concerns• Selects critical areas• Measures success
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Watershed Description
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Agriculture73%
Forest14%
Developed6%
Hay/Pasture5%
Wetlands0.1%
Shrub/Scrub0.005%
Open Water1%
Maria Creek Watershed Land Use
Watershed = 97 sq. miles
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Watershed Impairments
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2018 303(d) Listings
• Approximately 55 stream miles impaired:– 55 stream miles for E. coli– 23 stream miles for Impaired Biotic Community (IBC)– 5 stream miles for Dissolved Oxygen
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Watershed Characterization Monitoring
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Monitoring Overview• Monitoring will take place from November
2019 through October 2020 • 18 sampling sites in total• Sampling for biological communities (fish and
aquatic insects) and bacteria concentrations (E. coli) done April through October
• 6 sites sampled year-round for water chemistry
Project Webpage:www.idem.IN.gov/nps/4054.htm
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Water Quality Parameters(General Chemistry)
Parameter Water Quality Standard / Target Reference
Total Solids No Regulatory Target
Total Suspended Solids (TSS) No value should exceed 30.0 mg/L
in an IBC impaired segment IDEM Target value
Total Dissolved Solids No Regulatory Target
SulfateCriteria based on hardness
and chlorideIndiana Administrative Code
(327 IAC 2-1-6)
ChlorideCriteria based on hardness
and sulfateIndiana Administrative Code
(327 IAC 2-1-6)
Hardness No Regulatory Target
Alkalinity No Regulatory Target
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Water Quality Parameters(Nutrients)
Parameter Water Quality Standard / Target Reference
Ammonia Nitrogen Criteria based on temperature and pH
Indiana Administrative Code (327 IAC 2-1-6)
Total Kjeldahl Nitrogen (TKN) No value should exceed 0.591 mg/LU.S. Environmental Protection Agency
(U.S. EPA) recommendation
Nitrate-N+ Nitrite-N No value should exceed 10 mg/L IDEM Target value
Total Phosphorus (TP) No value should exceed 0.30 mg/L IDEM Target value
Total Organic Carbon (TOC) No Regulatory Target
Chemical Oxygen Demand (COD) No Regulatory Target
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Water Quality Parameters(Field Parameters)
Parameter Water Quality Standard / Target Reference
pH No value should be < 6.0 or > 9.0 Indiana Administrative Code (327 IAC 2-1-6)
DO No value should be < 4.0 mg/L Indiana Administrative Code (327 IAC 2-1-6)
% DO Saturation No value should be >120% IDEM Target Value
Temperature Values vary monthly Indiana Administrative Code (327 IAC 2-1-6)
Specific Conductance No Regulatory Target
Turbidity No Regulatory Target
Weather Conditions No Regulatory Target
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Using the Monitoring Results
• Watershed Reassessment– Define impairments based on new data
• Data Analysis– Use precipitation and flow to calculate pollutant
loadings– Analyze chemical, physical, and biological measures
to identify stressors/sources
• Write TMDL document
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Time Frame
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Maria Creek Watershed TMDL Schedule
• Kickoff public meeting: December 2019
• Monitoring begins: November 2019
• Monitoring ends: October 2020
• Draft TMDL public meeting: Expected Summer 2021
• 30-day public comment period: Expected Summer 2021
• Final TMDL report submittal to U.S. EPA: Expected Fall 2021
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IDEM Requests Your Help
We would welcome any information on:• Water quality data
• Possible pollution sources
• Potential stakeholders
• Studies, reports, and documents
• Projects/Best Management Practices that have improved water quality
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Maria Creek Project Information
Project Webpage: www.idem.IN.gov/nps/4054.htm
• Contains:– Location of Sampling Sites– Meeting Schedules– Project Workplan– Site Photos– Quarterly Data Results– Presentations
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Contact InformationAllie GatesTMDL Project ManagerPhone: (317) 308-3178Fax: (317) 308-3219Email: [email protected]
www.idem.IN.gov/nps/4054.htm
Josh BrosmerWatershed SpecialistPhone: (317) 308-3190Fax: (317) 308-3219Email: [email protected]
IDEM - Office of Water QualityWatershed Assessment and Planning Branch
100 N. Senate Ave.Indianapolis, IN 46204-2251