Design Checklist
- Identify the problem.
- Develop a system plan.
- Establish design criteria including:
- design frequency (design AEP),
- allowable ponded width,
- allowable ponded depth,
- pressure or non-pressure flow,
- critical elevations,
- suitable materials and conduit shapes,
- minimum and maximum allowable velocity, and
- minimum cover.
- Develop sheet flow analysis of streets and terrain for existing and proposed conditions.
- Determine outfall channel flow characteristics.
- Identify and accommodate utility conflicts.
- Consider the construction sequence and plan for temporary functioning.
- Design the system, including determination of runoff, design of inlets and conduits, and analysis of the hydraulic grade line.
- Check the final design, including check flood, and adjust if necessary.
- Document the design.