ASCE November 2019 Luncheon
The Engneering Center of St. Louis
4359 Lindell Blvd.
St. Louis, MO 63108
November 12, 2019
11:30 AM - 1:00 PM
Jason Peterein, P.E. - Program Manager, MSD St. Louis Sewer District
A Look at the St. Louis Area MS4 Permit Strategy and Stormwater Management Plan
Missouri 's general NPDES permit for regulated municipal separate storm sewer systems (MS4s) requires implementation of best management practices (BMPs) via an iterative process to reduce the discharge of pollutants into the MS4 to the maximum extent practicable (MEP), with the goal of meeting Missouri's Water Quality Standards. To meet this requirement, MS4's must develop a stormwater management plan (SWMP) that implements the permit's requirements for the six minimum control measures. MSD, St. Louis County, and 59 other regulated municipalities within MSD's service boundaries have agreed to coordinate permit compliance activities as copermittees, with MSD being the coordinating authority. This strategy encourages cooperation among municipalities, allows for a watershed-based approach to reducing pollution, and the sharing of financial responsibilities. Through a collaborative effort, a steering committee consisting of MSD, co-permittees, and interested stakeholders developed a Stormwater Management Plan. The plan outlines the requirements of the current MS4 permit's six minimum control measures, and how the copermittees will cooperate to address the requirements of the MS4 permit. The plan was approved by the Missouri Department of Natural Resources.
This presentation will highlight some of the key Best Management Practices that are in the Stormwater Management Plan and how they are evaluated for effectiveness. Finally, a look at the MDNR audit process and steps co-permittees can take to prepare for it will also be presented.