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  2. Impaired Waters and TMDLs

Nutrient TMDL Workshop

The following tables document the agenda of the workshop along with presentation materials.

Day 1 - Tuesday, February 15

Time Session
8:00 Registration
8:30 Welcome
8:45 Workshop Purpose and Goals
Menchu Martinez, US EPA Headquarters and Jim Ruppel, US EPA Region 8
9:00 Overview Session 1: Programmatic and Scientific Background
Moderator: Mike Haire, US EPA Headquarters
10:30 Break
10:45 Overview Session 2: Nutrient Criteria Development
Moderator: Mike Haire, US EPA Headquarters
12:15 Lunch on your own
1:30 Listing Session 1: Assessing and Listing Nutrient Impairments
Moderator: Kim Caviness, Mississippi Department of Environmental Quality
3:30 Break
3:45 TMDL Session 1: Overview of the Existing Methods for Nutrient TMDL Development
Moderator: Kim Caviness, Mississippi Department of Environmental Quality
5:00 Adjourn

Overview Session 1: Programmatic and Scientific Background

Time Session
9:00 Nutrient Effects on Aquatic Ecology, Recreation and Drinking Water Supply: Nutrient and Key Response Indicators
Michael Paul, Tetra Tech
Presentation: Nutrient Effects on Aquatic Ecology, Recreation and Drinking Water Supply: Nutrient and Key Response Indicators
9:30 Nutrients and the Clean Water Act Section 303(d) Listing and TMDL Program
John Goodin, US EPA Headquarters
Presentation: Nutrients and the Clean Water Act Section 303(d) Listing and TMDL Program
10:15 Questions and Answers

Overview Session 2: Nutrient Criteria Development

Time Session
10:45 Nutrient Criteria: National Overview/Recent Developments/Look to the Future
Dana Thomas, US EPA Headquarters

Presentation: Status of Numeric Nutrient Criteria Development

11:20 Overview of EPA's Promulgated Numeric Nutrient Criteria for Florida's Streams, Lakes and Springs
Daryll Joyner and Jan Mandrup-Poulsen, Florida Department of Environmental Protection
Presentation: Overview of EPA's Promulgated Numeric Nutrient Criteria for Florida's Streams, Lakes and Springs

Listing Session 1: Assessing and Listing Nutrient Impairments

Time Session
1:30 Results of the National Survey
Sarah Lehmann, US EPA Headquarters
Presentation: The National Aquatic Resource Surveys (NARS) Nutrient Results
2:00 Listings Based on Narrative Water Quality Criteria
Bill Painter, US EPA Headquarters
Presentation: Selected Information from Watershed Branch In-House Surveys of EPA Regions -- Nutrient Listings
2:20 Stressor Identification
Jeffery Frithsen, US EPA Headquarters
Presentation: Stressor Identification
3:00 Discussion, Questions and Answers

TMDL Session 1: Overview of the Existing Methods for Nutrient TMDL Development

Time Session
3:45 Overview of Findings from Compendium of Nutrient TMDLs
Rosaura Conde, US EPA Headquarters and Jennifer Olson , Tetra Tech
Presentation:Compilation of Practices Observed in Nutrient Listing and Total Maximum Daily Loads (TMDLs)
4:15 Quantitative Prediction of Nutrient Effects on Key Response Indicators and Use
Tim Wool, US EPA Region 4
Presentation: Quantitative Approaches for Linking Nutrient Concentrations to Response Indicators for TMDL Development

Day 2 - Wednesday, February 16

Time Session
8:30 Opening Remarks
8:45, 10:45 TMDL Session 2: Setting Nutrient Targets
Moderator: Tom Stiles, Kansas Department of Health
10:30 Break
12:00 Lunch
1:00 Concurrent Session 1A: TMDL Modeling Applications
Moderator: Joni Nuttle, Colorado Department of Public Health & Environment
1:00 Concurrent Session 1B: State Approaches to Nutrient TMDLs
Moderator: Mark Osborn, Missouri DNR
3:00 Break
3:15 Concurrent Session 2A: Technical and Regulatory Issues in TMDL Development
Moderator: Joni Nuttle, Colorado Department of Public Health & Environment
3:15 Concurrent Session 2B: TMDL Implementation
Moderator: Mark Osborn, Missouri DNR
4:45 Adjourn

TMDL Session 2: Setting Nutrient Targets

Time Session
8:45 Developing Nutrient Concentration Targets from Narrative Criteria
Bill Painter, US EPA Headquarters
Presentation: Selected Information from Watershed Branch In-House Surveys of EPA Regions—Nutrient Listings
9:00 Setting Water Quality Targets for Phosphorus and Nitrogen
Michael Paul, Tetra Tech
Presentation: Setting Water Quality Targets for Nitrogen and Phosphorus
9:30 Pennsylvania Nutrient TMDLs – Using a Weight of Evidence Approach

Elizabeth Gaige, US EPA Region 3

10:00 Michigan Approach to Setting Nutrient Targets Based on Biological Impairments
Sylvia Heaton, Michigan Department of Environmental Quality
Presentation:Developing Nutrient Targets for TMDLs: Biological Thresholds and Predictive Modeling
10:45 Identification of Nutrient Concentrations and Enrichment Indicators for Application in a Weight- of-Evidence Based Nutrient Water Quality Standard for Ohio
Bob Miltner, Ohio Environmental Protection Agency
Presentation: Development of Nutrient Water Quality Standards for Ohio Surface Waters
11:15 Development of Biologically Based Total Maximum Daily Loads for Nutrients in the Upper Midwest
Shivi Selvaratnam, Indiana Department of Environmental Management and Jeff Frey , USGS
Presentation: Nutrient Targets for Development of Biologically Based Total Maximum Daily Loads for the Upper Midwest
11:45 Panel Discussion

Concurrent Session 1A: TMDL Modeling Applications

Time Session
1:00 Nutrient Modeling Overview
Dr. Mazdak Arabi, Colorado State University
Presentation: Nutrient Modeling Overview
1:45 Using Load Duration Curves in Nutrient TMDLs
Bruce Cleland, Tetra Tech
Presentation: Nutrient TMDLs: Using Duration Curves to Develop Nutrient TMDLs
2:05 Water Quality Modeling – Technical Applications Using Mechanistic Models
Tim Wool, US EPA Region 4
Presentation: Mechanistic Models in Nutrient TMDL Development
2:40 Nutrient TMDLs for Reservoirs with Limited Data: Assessing Uncertainty Using Monte Carlo Simulation
Andrew Fang, Oklahoma Department of Environmental Quality
Presentation: Nutrient TMDLs for Reservoirs with Limited Data: Assessing Uncertainty Using Monte Carlo Simulation

Concurrent Session 1B: State Approaches to Nutrient TMDLs

Time Session
1:00 Nutrient TMDLs Issues in Kentucky
Andrea Fredenburg, Kentucky Division of Water
Presentation: Nutrient TMDL Issues in Kentucky
1:20 Nutrient TMDL Development and Implementation in New Mexico
Shelly Lemon, New Mexico Environment Department
Presentation: New Mexico's Approach to Nutrient Impaired Waters
1:40 North Carolina Nutrient TMDLs: Integrating State and Federal Programs
Pam Behm, North Carolina Division of Water Quality
Presentation: North Carolina Nutrient TMDLs: Integrating State and Federal Programs (PDF)
2:05 Los Angeles Area Lake TMDLs
Valentina Cabrera-Stagno, US EPA Region 9
Presentation: Los Angeles Area Lakes EPA TMDLs: “Simple” TMDLs Developed Using the NNE BATHTUB Model
2:30 Expressing Load Allocations for Nutrient TMDLs with Direct Linkage to Implementation Tools
Kevin Kirsch, Wisconsin Department of Natural Resources
Presentation: Expressing Load Allocations with Direct Linkage to Implementation Tools

Concurrent Session 2A: Technical and Regulatory Issues in TMDL Development

Time Session
3:15 Linking Nutrients and Sediment Oxygen Demand, Souris River TMDL
Heather Husband Duchscherer, North Dakota Department of Health
Presentation: Linking Nutrients and SOD, Souris River TMDL
3:45 Cutler Reservoir's Phased TMDL for Nutrients & Dissolved Oxygen
Michael Allred, Utah Department of Environmental Quality
Presentation: Bear River-Cutler Reservoir TMDL
4:15 Convergence of the Clean Water Act and a Federal Civil Works Project – the Central and South Florida Project Canals
Kevin Carter, South Florida Water Management District
Presentation: The Clean Water Act and the Central and South Florida Project Canals

Concurrent Session 2B: TMDL Implementation

Time Session
3:15 Addressing Uncertainty in TMDL Implementation
Tom Davenport, US EPA Region 5
Presentation: Addressing Uncertainty in Watershed Management
3:45 Development of a Water Quality Trading Framework in Wisconsin for Phosphorus
Kevin Kirsch, Wisconsin Department of Natural Resources
Presentation: Development of a Water Quality Trading Framework in Wisconsin for Phosphorus
4:15 Grand Lake St. Mary's Lake Restoration
Russ Gibson, Ohio EPA and Tom Davenport , US EPA Region 5
Presentation: Implementing Grand Lake St. Marys Nutrient TMDL

Day 3 - Thursday, February 17

Time Session
8:30 Opening Remark

Implementation Session
Moderator: Amy Walkenbach, Illinois Environmental Protection Agency

9:00 Point Source Reduction Strategies
Joh Kang, Tetra Tech
Presentation: Point Source Strategies for Nutrient Reduction
9:30 Implementation Strategies for Reducing Nonpoint Source Nutrient Impacts
Russ Gibson, Ohio Environmental Protection Agency
Presentation: Implementation Strategies for reducing NPS Nutrient Impacts
10:00 eRAMS – A Tool to Integrate Point and Nonpoint Source Reduction Strategies
Dr. Mazdak Arabi, Colorado State University
Presentation: eRAMS - A Web-Technology for Conservation Planning and Watershed Management
10:30 Break
10:45 Multi-Jurisdictional Efforts
Moderator: Chris Lewicki, US EPA Headquarters
11:45 Closing Remarks
John Goodin, US EPA Headquarters
12:00 Adjourn Workshop

Multi-Jurisdictional Efforts

Time Session
10:45 Update from the Gulf of Mexico Alliance and the Mississippi River/Gulf of Mexico Nutrient Task Force
Kim Caviness, Mississippi Department of Environmental Quality
Presentation: Reducing Nutrient Impacts: Activities of the Gulf of Mexico Alliance and the Mississippi River/Gulf of Mexico Nutrient Task Force
11:05 Multi-Jurisdictional TMDLs – Chesapeake Bay and Others
Mike Haire, US EPA Headquarters
Presentation: Developing Multijurisdictional TMDLs: An Update on the Effort to Develop a National Policy Memorandum

Presentation Documents

  • Nutrient Effects on Aquatic Ecology, Recreation and Drinking Water Supply: Nutrient and Key Response Indicators (Nutrient TMDL Workshop) (pdf) (668.31 KB)
  • Nutrients and the Clean Water Act Section 303(d) Listing and TMDL Program (Nutrient TMDL Workshop) (pdf) (468.68 KB)
  • Status of Numeric Nutrient Criteria Development (Nutrient TMDL Workshop) (pdf) (719.89 KB)
  • Overview of EPA's Promulgated Numeric Nutrient Criteria for Florida's Streams, Lakes and Springs (Nutrient TMDL Workshop) (pdf) (479.38 KB)
  • The National Aquatic Resource Surveys (NARS) Nutrient Results (Nutrient TMDL Workshop) (pdf) (1.18 MB)
  • Selected Information from Watershed Branch In-House Surveys of EPA Regions -- Nutrient Listings (Nutrient TMDL Workshop) (pdf) (25.93 KB)
  • Stressor Identification (Nutrient TMDL Workshop) (pdf) (3.58 MB)
  • Compilation of Practices Observed in Nutrient Listing and Total Maximum Daily Loads (TMDLs) (Nutrient TMDL Workshop) (pdf) (432.13 KB)
  • Quantitative Approaches for Linking Nutrient Concentrations to Response Indicators for TMDL Development (Nutrient TMDL Workshop) (pdf) (510.51 KB)
  • Setting Water Quality Targets for Nitrogen and Phosphorus (Nutrient TMDL Workshop) (pdf) (479.51 KB)
  • Developing Nutrient Targets for TMDLs: Biological Thresholds and Predictive Modeling (Nutrient TMDL Workshop) (pdf) (955.87 KB)
  • Development of Nutrient Water Quality Standards for Ohio Surface Waters (Nutrient TMDL Workshop) (pdf) (1.05 MB)
  • Nutrient Targets for Development of Biologically Based Total Maximum Daily Loads for the Upper Midwest (Nutrient TMDL Workshop) (pdf) (1.82 MB)
  • Nutrient Modeling Overview (Nutrient TMDL Workshop) (pdf) (820.46 KB)
  • Nutrient TMDLs: Using Duration Curves to Develop Nutrient TMDLs (Nutrient TMDL Workshop) (pdf) (5.91 MB)
  • Mechanistic Models in Nutrient TMDL Development (Nutrient TMDL Workshop) (pdf) (1.27 MB)
  • Nutrient TMDLs for Reservoirs with Limited Data: Assessing Uncertainty Using Monte Carlo Simulation (Nutrient TMDL Workshop) (pdf) (2.47 MB)
  • Nutrient TMDLs Issues in Kentucky (Nutrient TMDL Workshop) (pdf) (629.03 KB)
  • New Mexico's Approach to Nutrient Impaired Waters (Nutrient TMDL Workshop) (pdf) (499.69 KB)
  • North Carolina Nutrient TMDLs: Integrating State and Federal Programs (Nutrient TMDL Workshop) (pdf) (1.01 MB)
  • Los Angeles Area Lakes EPA TMDLs: “Simple” TMDLs Developed Using the NNE BATHTUB Model (Nutrient TMDL Workshop) (pdf) (4.01 MB)
  • Expressing Load Allocations for Nutrient TMDLs with Direct Linkage to Implementation Tools (Nutrient TMDL Workshop) (pdf) (2.09 MB)
  • Linking Nutrients and Sediment Oxygen Demand, Souris River TMDL (Nutrient TMDL Workshop) (pdf) (1.65 MB)
  • Bear River-Cutler Reservoir TMDL (Nutrient TMDL Workshop) (pdf) (2.07 MB)
  • The Clean Water Act and the Central and South Florida Project Canals (Nutrient TMDL Workshop) (pdf) (2.36 MB)
  • Addressing Uncertainty in Watershed Management (Nutrient TMDL Workshop) (pdf) (1.25 MB)
  • Development of a Water Quality Trading Framework in Wisconsin for Phosphorus (Nutrient TMDL Workshop) (pdf) (995.7 KB)
  • Implementing Grand Lake St. Marys Nutrient TMDL (Nutrient TMDL Workshop) (pdf) (2.46 MB)
  • Point Source Strategies for Nutrient Reduction (Nutrient TMDL Workshop) (pdf) (977.03 KB)
  • Implementation Strategies for Reducing NPS Nutrient Impacts (Nutrient TMDL Workshop) (pdf) (2.75 MB)
  • eRAMS - A Web-Technology for Conservation Planning and Watershed Management (Nutrient TMDL Workshop) (pdf) (6.02 MB)
  • Reducing Nutrient Impacts: Activities of the Gulf of Mexico Alliance and the Mississippi River/Gulf of Mexico Nutrient Task Force (Nutrient TMDL Workshop) (pdf) (947.6 KB)
  • Developing Multijurisdictional TMDLs: An Update on the Effort to Develop a National Policy Memorandum (Nutrient TMDL Workshop) (pdf) (959.06 KB)

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Last updated on July 22, 2024
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