The Inlet Spacing Spreadsheet (xls 167 kb) combines the procedures described in the WSDOT Hydraulics Manual to calculate roadway runoff and inlet interception of a continuous curb and gutter run for a roadway. The Sag Worksheet (xls 60 kb) uses the procedure described in the WSDOT Hydraulics Manual to locate inlets in a sag condition.
Hydraulic Capacity of Precast Concrete Boxes Under certain conditions the hydraulic or structural characteristics of reinforced concrete box sections of-fer advantages over the circular and non-circular pipe shapes commonly used for sewers and culverts. The cost-effective advantages of precast concrete pipe Calculate the initial trial culvert size for any shape culvert, including culvert shapes other than box and round. HW - Submerged Inlet - IC Calculate the headwater depth (HW) for a culvert under inlet control (IC) with a submerged inlet.