Design Checklist

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