2. System Plan
Preliminary or working drawings featuring the basic components of the intended design are invaluable in the development of a system plan. After design completion, the drawings facilitate documentation of the overall plan.
The following items should be included in the working drawings:
- a general layout
- basic hydrologic data
- pertinent physical features
- characteristics of flow diversion (if applicable)
- detention features (if applicable)
- outfall location and characteristics
- surface features (topography)
- utilities
- tentative component placement.
The final drainage design drawings should include the existing physical features of the project area and indicate the location and type of the following:
- streets
- driveways
- sidewalks and ADA ramps
- parking lots
- bridges
- adjacent areas indicating land use, such as undeveloped land, commercial land, industrial land, agricultural land, residential land, and park land
- detention facilities
- pump stations
- drainage channels
- drainage diversions
- off-site watershed boundaries.