What is the minimum standard for the gap at mean low water between the curtain and water body floor?

The minimum standard for the gap at mean low water between the curtain and the water body floor is 1 foot. This specification is important because it helps ensure effective sediment control while allowing for adequate water flow and movement. A gap of this size helps to prevent turbulence and allows for proper settling of suspended sediments, which is crucial in managing water quality and protecting aquatic habitats.

This standard is established to balance the need for sediment control with the practical considerations of maintaining ecological health in the water body. A gap that is too small might limit water flow and exacerbate sediment accumulation, while one that is too large could diminish the effectiveness of the curtain. Therefore, establishing a 1-foot gap strikes a compromise that is practical and effective in managing stormwater runoff and sedimentation.