D. Design Criteria

Additional design criteria for specific drainage facilities are required as follows:

1. Shoulders in Cut Areas (without swales)

Water flowing in the shoulder shall not encroach more than two thirds the shoulder width during a 10-year frequency storm of five minute duration.

The maximum velocity as determined by Manning's equation shall not exceed the allowable velocities as shown in Table 3 for the specific type of shoulder material.

FIGURE F Inlet Capacity and Gutter Flow Curves

FIGURE G Roadway Grass Swale Capacity