Phase II Storm Water Resources

When water runs off a property, it flows into the County’s municipal separate storm sewer system (MS4) which is composed of streets, storm drains, ditches, waterways and other facilities, both public and private, by which storm water is conveyed. The MS4 is separate from the MSD’s sanitary sewer system, which goes to wastewater treatment plants. Discharges to the MS4 do not get treated; they flow directly into area creeks, rivers and lakes. Sediment negatively impacts water quality by degrading the habitat of aquatic organisms and fish, impeding recreational opportunities, deceasing property value, and promoting the growth of weeds and algae. Sediment accumulation in ditches, streams, and lakes reduces their capacity, thereby increasing the chance of frequent flooding. This “Toolbox” provides abbreviated versions of Best Management Practices (BMPs) to ensure that necessary measures are taken to prevent erosion and protect sediment from leaving the land disturbance site and entering waterways.


Other Resources

  • Concrete washout water solutions: County Concrete Waste Management and MSD Concrete Washout Solutions   
  • Inspection checklist template: EPA Inspection Template  
  • EPA menu of BMPs: Stormwater Best Management Practices
  • MDNR Water Protection Program - Land Disturbance Permits contacts:
    • Local Office: St. Louis Regional Office, 7545 S. Lindbergh Boulevard, Suite 210, St. Louis, MO, 63125, Phone - (314) 416-2960
  • St. Louis County (SLC) Land Disturbance Code:
    St. Louis County Land Disturbance Friendly
    • SLC Land Disturbance Code separates land disturbances into two basic categories: Major Land Disturbances for land disturbance activities involving 1 acre or more of land or a site involving less than 1 acre as part of a proposed development that will ultimately disturb 1 acre or more; and Ordinary Land Disturbances for land disturbance activity involving less than 1 acre of land.
  • Department of Public Works Municipal Contract Services:
    Public Works Matrix
    • The  Municipalities may contract land disturbance permitting and inspection services with the Department of Public Works.  Under contract, Public Works serves as the coordinator of major development projects, acting as the central control on permit issuance.  
  • International Erosion Control Association:   
    • The International Erosion Control Association (IECA) is the world’s oldest and largest association devoted to helping members solve the problems caused by erosion and sediment. 
  • Erosion Control Journal:
    • The Journal for Erosion and Sediment Control Professionals, reaches more than 21,000 subscribers. Published 7 times each year, EC is the Official Journal of the International Erosion Control Association
  • Erosion Control Technology Council:
    • Erosion Control Technology Council (ECTC) has set its mission to be the recognized industry authority in the development of standards, testing, and installation techniques for rolled erosion control products (RECPs), hydraulic erosion control products (HECPs) and sediment retention fiber rolls (SRFRs). ECTC promotes the use of RECPs, HECPs and SRFRs through education and industry leadership, and assists specifying agencies, engineers, designers and other interested individuals and organizations in the proper application of products and establishment of testing standards.
  • Certified Professional in Erosion and Sediment Control Exam Review Calendar:  (click on calendar at the bottom of the page)
    • The Certified Professional in Erosion and Sediment Control (CPESC) has a goal of identifying individuals qualified to work in the specialized area of erosion and sediment control. The CPESC has approximately 5000 CPESC registrants internationally.
  • During construction BMP strategies shall be implemented to protect post construction, permanent BMPS. Post-construction BMPs(such as filters, bioretention/rain gardens, dry swales, and infiltration areas) must be installed after contributing drainage areas are stabilized in order to prevent them from clogging with construction sediment. 


Erosion Reminder Items

It’s cheaper to prevent erosion than to repair damage after it’s become a problem, risking violations of your permit, costly fines and tearing out and replacing the work you’ve already done.  What’s more, you could face legal action and fines from not only the city/muny you are working within, but also the EPA.  The following is a partial list of EPA violation amounts for land disturbance activities (EPA may change violation amounts from time to time without notice):

  • SWPPP unprepared = $4000
  • Inadequate SWPPP = $50 - $750/violation
  • Sign not posted = $250
  • Control measures not properly selected, installed, maintained = $500/violation
  • Litter, construction debris, chemicals exposed to storm water = $500/violation
  • Entrance/exit not inspected for off-site tracking = $500/violation
  • No inspections = $75/7 days
  • Inspections by unqualified personnel = $500


Disclaimer:  This information is not intended to be a policy for designing plans and specifications, but a source of information about land disturbance best management practices.