Southeast Metro Stormwater Authority


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The Southeast Metro Stormwater Authority (SEMSWA) provides Stormwater Management Services to property owners in the City of Centennial, unincorporated Arapahoe County*, and a small portion of northern Douglas County**.

SEMSWA’s purpose is to:
• Protect people and property from flooding
• Comply with federal environmental regulations
• Provide a funding mechanism for stormwater services

Click image to view map

SEMSWA was formed in 2006 by an Intergovernmental Agreement among the following entities:
• City of Centennial
• Arapahoe County
• Arapahoe Water and Waste Water Authority
• East Cherry Creek Valley Water and Sanitation District
• Inverness Water and Sanitation District

For more information, please call 303-858-8844.

*Unincorporated portions in the western, urbanized part of the County
**Property within the Inverness Business Park

VIEW VIDEO Click on the image above to view a video of flooding within the Authority area (2 MB)

WHAT'S NEW
Piney Creek SEMSWA, and funding partners Urban Drainage and Flood Control District, Arapahoe County, and the City of Centennial, announces the start of construction for the Piney Creek Bridge, Stream Stabilization and Stormsewer Outfall Project in January 2010. The project is located within the Piney Creek Ranches neighborhood at E Caley Dr. and E Euclid Dr. and near the entrance to Antelope Hill Subdivision at E Arapahoe Rd at S Gibraltar St. See map. For more info, please contact Molly Trujillo, SEMSWA CIP Project Manager at 303-858-8844.