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In observation of the federal Labor Day holiday, all County offices will be closed on Monday, Sept. 1, 2025. Offices will reopen for regular hours on Tuesday, Sept. 2. Many County services are available 24/7 on our Online Services webpage.

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Public Works

Storm Drainage Design and Technical Criteria Manual

water and trash running down residential street into storm drain

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.

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