Stormwater Management & Illicit Discharge

Construction Site Stormwater Runoff Management/Sediment Control/Pollution Prevention, Best Management Practices (BMPs)
The primary goal of the runoff control program is to reduce pollutants in stormwater runoff from construction activities disturbing 1 or more acres of land. Additional objectives include providing procedures for public input, sanctions to ensure compliance, requirements for construction site operators to implement appropriate erosion and sediment control practices, review of site plans which incorporates consideration of potential water quality impacts, and procedures for site inspection and enforcement of control measures. Best management practices, (BMP’s) are effective, practical methods which prevent, reduce, or control the movement of sediment and other pollutants from the land to surface or ground water, or which otherwise protect water quality from potential adverse effects of land disturbing activities. The City of Ozark has establish requirements for construction site operators to control waste such as discarded building materials, concrete truck washout, chemicals, litter, and sanitary waste at the construction site that may cause adverse impacts to water quality. The Missouri Department of Natural Resources provides a manual with additional information regarding erosion and sediment control requirements.

The U.S. Environmental Protection Agency also provides a document that speaks to the effectiveness of specific BMP’s to treat specific pollutants.

Land Disturbance
Eroded sediment in storm water runoff is the leading source of pollution for Missouri's surface waters. Material displaced as a result of construction activity contributes more sediment to receiving water bodies than what would be normally deposited. The increased sediment loadings cause physical and biological harm to our valuable water resources. Controlling erosion can significantly reduce the amount of sediment and other pollutants that result from construction site runoff. Any time an acre or more of soil is being displaced or a drainage pattern is being altered the City of Ozark requires a Land Disturbance permit. An application must be completed and submitted with a grading plan prior to accomplishing any land disturbance of an acre or more. The application shall include a completed Stormwater Pollution Prevention Plan, (SWPPP) a completed and approved Missouri State application for a Land Disturbance Permit, and a completed Missouri State Operating Permit. The U.S. Environmental Protection Agency provides a guide to assist in the development and the implementation of an effective Stormwater Pollution Prevention Plan, (SWPPP).

Stormwater Detention Facilities
Detention facilities are used to reduce storm water runoff rates by storing excess runoff. Detention basins are the only effective “on-site” means for controlling peak stormwater runoff rates as areas develop. The City of Ozark’s Design Standards contain the engineering standards for design of detention basins. In limited situations, the City of Ozark may accept payment in lieu of constructing stormwater detention. See the City of Ozark’s Application for payment in Lieu of Constructing Stormwater Detention.

Illicit Discharge Detection & Elimination
The focus of the illicit discharge detection and elimination program is to detect and eliminate illicit discharges, including spills and illegal dumping. In addition, the City of Ozark must identify and address significant contributors of pollutants to the MS4, implement appropriate enforcement procedures and actions, and develop a storm sewer system inventory and overall map showing all outfalls and associated conveyances. The final program goal is to inform employees, businesses, and the general public of hazards associated with illegal discharges and improper disposal of waste. The City of Ozark developed and adopted an ordinance to prohibit illicit discharges to the storm sewer system. Also GIS mapping of the existing stormwater drainage system is being accomplished, and corresponding drainage areas have been delineated and receiving streams identified