Note : Types of Stormwater Inlets from HEC12 and HEC22 Stormwater Inlets consist of four main types ( http://onlinemanuals.txdot.gov/txdotmanuals/hyd/storm_drain_inlets.htm ) with most common shown in Figure 1. 1. Curb opening inlets either at a sag or continuous on the street, 2. Grate Inlets either at a sag or in combination with a Curb opening 3. Slotted Drains in parking lots which can be simulated as curb opening inlets and 4. Combination inlets either at a sag or continuous on the street which combine a curb opening inlet and a grate inlet for the stormwater runoff A sag inlet is the end of the line for the runoff because the flow and its debris load have no other place to go as described in the HEC-22 and HEC-12 manuals and a continuous grade inlet...
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