The height of the dike at the inlet should be equal to the pipe diameter plus how many inches?

The height of the dike at the inlet being equal to the pipe diameter plus 6 inches is based on engineering practices aimed at ensuring effective water flow management and sediment control. This additional height accounts for several factors critical in stormwater management.

First, the added height helps to prevent overflow during heavy rain events, ensuring that the water level does not exceed the dike and cause potential flooding in surrounding areas. The extra height also provides a buffer to accommodate variations in water depth that may result from fluctuating stormwater flow conditions or debris accumulation at the inlet.

Additionally, this 6-inch elevation is a standard guideline that has been established through practical experience and regulatory recommendations in Florida's stormwater management practices. It is essential to adhere to these guidelines to enhance the reliability of stormwater systems and prevent erosion and sedimentation issues effectively.

In summary, the requirement for the dike height to be the pipe diameter plus 6 inches is a design consideration that enhances the dike's ability to manage stormwater effectively while mitigating the risk of overflow and other related issues.