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Stormwater drains are separate from our sanitary sewer systems. Unlike water in sanitary sewers (from sinks or toilets), water in the storm drains is not generally treated before it goes into the Colorado River. Anything used outside of homes, vehicles and businesses -- like motor oil, paint, pesticides, fertilizers and cleaners that could be washed or blown into storm drains constitutes an illict discharge.

Sources of stormwater pollution are:

• Litter and trash, lawn clippings, animal waste and other organic matter
• Soil erosion and debris from landscape and construction activities
• Improper disposal of cleaners, paint and paint removers, used oil and other engine fluids
• Pesticides and fertilizers from lawns, gardens and farms
• Automotive leaks and spills.

KEEP POLLUTANTS OUT OF STORM DRAINS

What YOU can do to prevent stormwater pollution
Healthy Household Habits for Clean Water

Municipal Storm Water Pollution Prevention Ordinance

The Storm Water Pollution Prevention Ordinance went into effect January 1, 2006, as mandated under the Federal Clean Water Act.  These federal regulations are designed to improve water quality in rivers and streams by reducing the amount of pollutants that stormwater picks up and carries into storm drain systems during rainstorm events. A violation of the ordinance can result in federal, state and local fines.

This ordinance prohibits the discharge of any materials into the storm drain system except uncontaminated storm water. Sediment from construction sites is considered a pollutant and must be contained on construction sites through the use of Best Management Practices (BMPs).

City ordinance requires construction sites disturbing one or more acres of land have a 5-2-1 Drainage Authority and a State permit and BMP controls in place to control erosion and sediment from leaving the site.  You must control the following:

• Mud and sediment originating from the site
• Mud tracking onto streets from vehicles leaving the site
• Hazardous chemicals from materials stored on-site

The State of Colorado requires sites to obtain a State stormwater discharge permit for construction activity and to develop a Construction Storm Water Management Plan (SWMP) to control construction site pollutants. The State permit application and SWMP guidance can be found at the CDPHE.

Stormwater Construction Permits requires a Construction Stormwater Management Plan be submitted for City review and approval according to the Stormwater Management Manual (SWMM) requirements.

Stormwater Management Manual -SWMM

Storm Water Construction Permits to sites greater than one acre in size.

For projects > 1 acre in size that disrupt soils, the Stormwater Construction Permit Field Inspection Report is required to be filled out by a qualified inspector every 14 days and after each rain event that causes surface runoff. City inspectors will be auditing construction sites to assure the form is completed.

Before construction starts

Before you clear, grub, or start construction on a site larger than one acre in size, you must obtain a Stormwater Construction Permit from the 5-2-1 Drainage Authority. You must provide:

• A copy of the State of Colorado Stormwater Discharge Permit
• A Construction Storm Water Management Plan (CSWMP) that has been approved by the 5-2-1 Drainage Authority
• Major modifications to the CSWMP must be approved by the 5-2-1 Drainage Authority
• Minor modifications do not need approval, but must be recorded on the CSWMP and kept on the construction site

After construction starts

Permittees are required to inspect the construction BMP's at least once every 14 days and after any weather event that results in surface runoff. 

The 5-2-1 Drainage Authority will inspect your construction site for compliance with the CSWMP requirements. All permit and CSWMP violations are expected to be corrected or a municipal summons may be issued.

Controlling pollutants from your construction site
ensures good water quality for future generations.

ONLY STORMWATER DOWN THE
STORM DRAIN!

Stormwater Hotline
263-8201
5-2-1 Drainage Authority

It is illegal to discharge anything other than stormwater--rain and snowmelt-- into the storm drainage system (streets, gutters, inlets, drainage ways).

Dumping one quart of motor oil into a storm drain can contaminate 250,000 gallons of water!

DON'T ALLOW POLLUTANTS TO ENTER THE STREET, GUTTER OR STORM DRAIN.

Call the 5-2-1 Drainage Authority Stormwater Hotline at 263-8201 if you see someone polluting the storm drain.

5-2-1 Drainage Authority

For more information, contact:
Jim Shanks
5-2-1 Drainage Authority Manager
Phone: 970-263-8201
email: Jim Shanks