§ 11.1. Introduction

The function of a bridge is similar to a culvert, in that it is to convey surface water under a highway, railroad, or other embankment. This chapter describes the hydraulic aspects of bridge design, construction and operation of bridges, and makes references to structural aspects only as they are related to the hydraulic design. The hydraulic design must consider channel and abutment scour at different bridge components. Also impact from floating debris must be considered for the structural design of the bridge components.

Where proposed streets cross existing or proposed watercourses, all-weather crossings shall be required. Bridges shall be adequate to allow passage of the design storm identified in Section 11.3.1 of this chapter.