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I have there charts and slide rules but it is not exactly the same as a granite inlet stone, but I do use there grate capacity information.

Thanks for the reply. I am going to order the book. If anyone else has any other references they would also be appreciated.

No, It is not the practice to use frames that have these a part of them. In the New England area we place a granite stone with a notched out 24" wide throat directly behind the frame. The inlet stone is 6'long and 18" high and 6 to 8" thick. Storm water will flow in the top of the...

Street catch basins may have directly behind them a inlet stone. It is used with a 3 flange frame and the inlet stone provides an additional throat to enter the structure.

I am looking for a good program or chart for inlet stone capacity. It must be able to allow for various cross slopes and street grades.