The purpose of this project was to bring funding and demonstration projects to the Table Rock Lake area community for stormwater runoff management solutions.
These solutions slow down rainwater runoff from developed areas and remove pollution, particularly nutrients (nitrogen and phosphorus), before it enters the lake. Table Rock Lake is currently placed on the Environmental Protection Agency’s list as impaired water bodies from excessive nutrient contamination which causes over growth of some algae species and degradation of water quality.
With increasing population and expanding developments around Table Rock Lake, the alterations to the natural landscape allow more rapid rainwater runoff from impervious surface causing soil erosion and washing, oil, antifreeze, detergents, pesticides, pet wastes and many other pollutants containing nutrients, heavy metals and other toxins into streams or Table Rock Lake. The geology of the Table Rock Lake area, which has very shallow, rocky and clay soil, also increases its risk of both surface and ground water contamination.
This project succeeded in highlighting several different types of stormwater solutions including vegetated swales, bioretention basins, terracing with stone and native plants and the main demonstration site at the Kimberling Center showing pervious interlocking concrete pavers (PICP) as a beautiful solution to old infrastructure. The work done through this project has been recognized by the local community and has brought awareness and attention to possible stormwater solutions, especially the use of pervious interlocking concrete pavers (PICP) on parking areas, a huge source of impervious surface. The manufacturer of the PICP used in this project, Belgard, will also continue to promote this project though their case studies and examples to a nation-wide audience.
Overall, this project’s success and accomplishes in stormwater management for water quality protection have been made possible through the cooperation of many local and regional partnerships. This project also owes its achievement to the Missouri Department of Natural Resources, Water Protection Project Managers and other dedicated staff who were able to provide the flexibility needed complete this project.
For more on the Table Rock Lake 319 Stormwater Demonstration Projects and other related material and resources at the links below.
Why Stormwater Management?
When rainwater hits the ground, it picks up any contaminants that have been left on the ground and carries them into drainage ditches, streams and lakes. Increasing population and expansion of developments around Table Rock Lake have caused alteration of the natural landscape and allowed faster movement of rainwater runoff from this development into the waterways. When it rains, oil, antifreeze, detergents, pesticides, pet wastes, soil erosion and many other pollutants containing chemicals and algae-growing nutrients such as nitrogen and phosphorus get washed from driveways, backyards, parking lots, and streets directly into streams or the Lake.
Coves and distinct regions of the lake are visibly clouded by soil erosion when there is construction in which vegetation is removed. Some soil erosion and nutrient runoff (which also occurs in natural settings) will not harm the water quality, but the volume of this storm water pollution caused by development and the landscape changes it causes will negatively affect water quality unless measures are taken to prevent the negative impacts as development increases. Vegetated areas and buffer zones can be used to minimize the impact of this pollution by capturing the runoff and filtering it before the rainwater reaches the lake.
TRLWQ received a grant from the Missouri Department of Natural Resources through the EPA section 319 cost-share program to install stormwater management and filtration systems for the purpose of demonstration and water quality protection. This cost-share is typically around 50% of the project cost.