§ 7.5.1. General

Section 1.2.4 of this manual states the City's criteria concerning storm water overtopping bridge structures.

Several hydraulic parameters should be considered in bridge design. These considerations should include, but should not be limited to, the following:

A.

Channel transitions into and out of the bridge opening.

B.

Overall length and height of bridge.

C.

Cross-sectional opening of bridge.

D.

Location of the bridge opening relative to the main channel.

E.

Bridge alignment relative to general flow of main channel i.e., "skewed" crossing.

F.

Number of crossings or bridge openings.

G.

Other obstructions to flow, i.e., piers, abutments, deck width and clearances.

H.

Design flows for bridge opening to pass.

I.

Any freeboard requirements for channel design.