FLOOD06421

• County: Statewide
• Basin: Statewide
• Title: Highways in the River Environment
• Date: 2/1/1990
• Prepared By: Federal Highway Administration
• Floodplain - Doc Type: Educational/Technical/Reference Information

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Elevation

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Plan

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Section A-AI

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Section A - AI

(0) Spill- through

(b) Wing - wall

Fig. 1.1.1 Geometric properties of bridge crossings.

The design procedures have been derived from laboratory and field observations
of bridge crossings. The desiQn procedures include allowances made for the effects
of skewness. eccentricity. scour. abutment setback. channel shape. submerQence of
the superstructure. debris. spur dikes. wind waves. ice. piers. abutment types. and
flow conditions. These design procedures take advantage of the large volume of
\Nork that has been done by many people in describing the hydraulics and scour
characteristics of bridge crossings.