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@jgailla I agree. While the probability of objects larger than 10 inches entering the system is low, the consequences may be great, i.e. flooding of the buildings. As with all variances, I'm sure the reason they propose this is to save a buck, but since financial hardship is not a valid basis...

Hello all and thanks in advance for any guidance you provide. I'm reviewing a site plan amendment for an industrial site. The site has an existing private drainage system outfalling to a public inlet via a 10-inch PVC pipe. The amendment will add buildings and therefore increases the runoff...

Hello All: I'm trying to understand how to account for the effect of urban storm routing and its effect on time of concentration and subsequently, design precipitation intensity in the rational method. As I understand this can be used to optimize the storm sewer system with smaller diameter...