#4 Sediment Forebay - I
Each pond shall have a sediment forebay, consisting of a separate cell
Size forebay to contain 0.1 inches per impervious acre. Maintain forebay at 3 to 6 feet deep
Exit velocities from the forebay shall not be erosive
Notes:
Pretreatment is a critical component of the success and longevity of stormwater pond and wetland performance. Pretreatment is best provided in the form of a sediment forebay, which can also serve to accommodate some portion of the water quality volume. The next slide presents a well-designed forebay.