Publication:
South Dakota Culvert Inlet Design Coefficients
FHWA-RD-01-076, June 2001
(PDF - 1,596KB)
Hydraulics & Hydrology Research
Abstract:
Each year, the South Dakota Department of Transportation builds a number
of box culverts through its highway construction program. In the past,
cast-in-place box culverts were used exclusively; however, use of precast box
culverts is becoming a viable option. The cast-in-place culverts feature
30-degree flared wingwalls and a beveled top edge. The precast culverts have a
0-degree flare and a constant 4-in (101.6-mm) bevel (regardless of barrel size)
along the top of the wingwalls and the top edge of the culvert entrance.
This report summarizes model testing performed on the above culvert shapes
for the purpose of developing design coefficients for both inlet and outlet
control. The most efficient configuration tested was the model of the
cast-in-place box culvert.
Back to
Hydraulics & Hydrology Research
