Storm Drainage Design and Technical Criteria Manual

The Douglas County Storm Drainage Design and Technical Criteria Manual specifies the policies and minimum technical criteria for the planning, analysis, and design of storm drainage systems within unincorporated Douglas County. All drainage reports and plans, drainage system analyses, and drainage system designs, submitted as a requirement of the Douglas County Zoning or Subdivision Resolutions, shall comply with these criteria. If you have any further questions, please contact Engineering at 303-660-7490.

Manual Sections

Drainage Manual Cover
Table of Contents – Updated July 2008
Chapter 1 – General Provisions – Updated May 2013
Chapter 2 – Policy and Principles – Updated July 2008
Chapter 3 – Management and Development – Updated July 2008
Chapter 4 – Drainage Report and Construction Drawing Submittal Requirements – Updated May 2013
Chapter 5 – Floodplain Management – Updated May 2013
Chapter 6 – Hydrology – Updated May 2013
Chapter 7 – Street Drainage – Updated May 2013
Chapter 8 – Inlets – Updated July 2008
Chapter 9 – Storm Sewers – Updated July 2008
Chapter 10 – Conduit Outlet Structures – Updated July 2008
Chapter 11 – Culverts and Bridges – Updated July 2008
Chapter 12 – Open Channel Design – Updated July 2008
Chapter 13 – Storage – Updated July 2008
Chapter 14 – Stormwater Quality – Updated June 2022