SEMSWA Stormwater Management Manual
Chapter 14 of the SMM, as amended was adopted by the SEMSWA Board of Directors (Resolution) in June 2019 for the purposes of implementing MS4 Permit Requirements.
The Stormwater Management Manual provides requirements for the planning, design, construction, and operation of stormwater facilities within the City of Centennial.
Update/Amendment History: Complete SMM updated January 2017, Chapter 14 (Stormwater Quality) updated July 2019. 20/10 calculator updated October 2020.
Chapter 1 - General ProvisionsChapter 2 - Stormwater Management Policy & PrinciplesChapter 3 - Stormwater Management and DevelopmentChapter 4 - Drainage Report and Construction Drawing Submittal RequirementsChapter 5 - FloodplainChapter 6 - HydrologyChapter 7 - Street DrainageChapter 8 - InletsChapter 9 - Storm SewersChapter 10 - Conduit Outlet StructuresChapter 11 - Culverts and BridgesChapter 12 - Open Channel DesignChapter 13 - StorageChapter 14 - Stormwater Quality (Revised July 1, 2019)Water Quality Treatment Matrix (Revised September 2019)Chapter 14 - Administrative Requirements (New July 1, 2019)20-10 Calculator (Revised April 2023)