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Wet Weather Training Materials

The Background

Many communities have to battle operational problems that are caused by rain events and high flows due to wet weather. Plants that are serviced by combined sewers are especially vulnerable to "wet weather woes." For systems with combined sewers, the SPDES permit requires that a "Wet Weather Operating Plan" be in place to optimize wet weather performance. The resources found here bring practical operational tools to combat wet weather problems and an approach for developing a Wet Weather Operating Plan. This project was founded by USEPA.

The links in the box to the right provide extensive training materials.

The Technology Transfer Document contains information on:

  • Section 1: State and Federal Regulations
  • Section 2: Concepts for Wet Weather Operations
  • Section 3: Operational Guidelines
  • Section 4: Case Studies

Appendices A-J include: Glossary, References, Dye Testing Procedure, Samples of Wet Weather Plans, Weir Formulas, Clarifier Loading Worksheets, Survey Results and Wet Weather Plan Development Forms.

Actual "Wet Weather Operating Plans" are included to give operators a better sense of what a good plan looks like. For large plants, the plan for Monroe County's Van Lare facility is our model. Ticonderoga is our model for a small plant.

The workshop is offered by:
Environmental Training Center at SUNY Morrisville
Contact: Kathy White at

Questions or comments on the Wet Weather Training Materials can be directed to: Phil Smith at: (Project Officer) or Scott Sellers at (Project Consultant).

USEPA Websites

The USEPA has the National Pollutant Discharge Elimination System Permit (NPDES) website which includes sections on "Combined Sewer Overflows" and "Sanitary Sewer Overflows."

The "Combined Sewer Overflow" section has information about CSOs, EPA's CSO Control Policy, current CSO related program activities, and Guidance documents.

The "Sanitary Sewer Overflows" section has the SSO Rule, Featured Case Studies, Factsheets, SSO Toolbox, SSO Subcommittee activities, and FAQ's.

Other USEPA Resources

  • "Optimization of Collection System Maintenance Frequencies and System Performance" prepared by the American Society of Civil Engineers (ASCE) in 1999.
  • "Protocols for Identifying Sanitary Sewer Overflows" was prepared in 2000.
  • "Collection Systems O&M Fact Sheet - Sewer Cleaning and Inspection."

NYSDEC's Stormwater Homepage has information on SPDES General Permit for Stormwater, Phase II Information, the Stormwater BMP Toolbox, Draft MSH Permit, Draft Construction Permit, and the Training Calendar.

The Citizens Environmental Research Institute (CERI) has the following publications available:

  • "Sanitary Sewer Overflows, A Citizens Guide"
  • "Sewage Overflows: A Discharge Map of Erie County's Foremost Urban Water Quality Problem"
  • "The Plain Language Guide to Sanitary Sewer Overflows: A Brief Introduction to the Basics of SSOs and What You Can Do To Eliminate Them"
  • "The Truth About Sanitary Sewer Overflows"

Other Sources of Information

Water Environment Federation

  • "Control of Infiltration and Inflow in Private Building Sewer Connections", 1999.
  • "Prevention and Control of Sewer System Overflows", MOP FD-17, 1999.
  • "Wastewater Collection Systems Management", MOP No. 7, 5th Edition, 1999.

California State University, Sacramento

  • "Operation & Maintenance of Wastewater Collection Systems", Volumes I and II, 1993.
  • "Collection System Operation & Maintenance Training Videos".
  • "Collection Systems: Methods for Evaluating and Improving Performance"

American Public Works Association

  • "Preparing Sewer Overflow Response Plans: A Guidebook for Local Governments", 1999.