Standard Drawings & Examples

Detention Plats Examples

Private Drainage Easement for Storm Water Detention Plat  

This example is a 24"x36" paper size.

The preferred plat size is 24"x36", however an 18"x24'' plat size is acceptable for small basins.
A signed Mylar is required after a paper copy is reviewed and approved.

Storm Water Detention As-Built Drawing  

This example is a 24"x36" paper size.

The preferred method is to generate an AutoCAD drawing showing the following information:

  1. Contours generated from field shots.
  2. All related storm sewers size, length, slope and material.
  3. All related storm structures ODOT specification, top, and pipe inlet and outlet elevations.
  4. Control structure top, orifice, and outfall pipe sizes and elevations.
  5. Calculations showing the actual volume to the upper window sill or weir elevation of the control structure.
  6. Show the as-built volume on the plan sheet.

Any legible paper size is acceptable.

Flood Route Examples

Street Flood Route (image)
Street Flood Route

 
Cul-de-sac Flood Route (image)
Cul-de-sac Flood Route

 
Section A-A Swale (image)
Notice the Section A-A Swale along the property line.

 

Shapefile Examples

Storm Water Detention Basin Coverage Graphical Example
Storm Water Detention Basin Coverage Graphical Example

This point coverage is being created using existing records and field inspection.
Storm Sewer Coverage Graphical Example
Storm Sewer Coverage Graphical Example

These arc (line) and point coverages are being created using existing records, as-built drawings, and digital drawings.
Special Flood Hazard Area (SFHA) Coverage Graphical Example
Special Flood Hazard Area (SFHA) Coverage Graphical Example

This polygon coverage was created using the actual flood profile elevations from the FEMA (Federal Emergency Management Agency) study, and the Consoer-Townsend Study. This coverage is to be used by civil engineers as a design aid to determine if a property is in a Special Flood HazardArea.
This coverage is NOT to be used for Flood Insurance purposes.