Directorate of Public Works

Welcome to the Fort Carson Stormwater Program

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The Fort Carson Stormwater Program is in place to help protect our surface waters from the pollution in stormwater runoff (rain or snowmelt that flows over the ground). Stormwater runoff can pick up feces, debris, sediment and chemical pollutants. This runoff flows into Fort Carson’s storm sewer system or directly to a pond, creek, river or wetland. Anything that enters a storm sewer system is discharged untreated into the water bodies we use for swimming, fishing and providing drinking water to people that live downstream. The Environmental Protection Agency (EPA) has issued Fort Carson three permits (described below) under the National Pollutant Discharge Elimination System (NPDES) to protect stormwater runoff quality. These permits are managed by the Stormwater Program.

Municipal Separate Storm Sewer System Permit (MS4) - EPA Region 8 has regulatory authority over stormwater management and permits at Fort Carson. Fort Carson's Municipal Separate Storm Sewer System (MS4) permit numbered COR042001 went into effect April 30, 2009. It was re-issued on January 1, 2016 and will expire on December 31, 2020. The permit applies to only the cantonment area and downrange, and not Pinon Cañyon Maneuver Site (PCMS). This permit addresses municipal discharges only. The MS4 permit requires Fort Carson to develop a comprehensive Stormwater Management Plan (SWMP). The purpose of the SWMP is to outline measures to reduce the discharge of pollutants to the maximum extent practicable, and to protect water quality. The SWMP outlines the best management practices (BMPs), measureable goals and requirements Fort Carson will use to implement the six minimum control measures (MCMs). As required by the permit, Fort Carson submits an annual report to EPA Region 8. The annual report provides the EPA the status of Fort Carson’s implementation of the SWMP. In the past, Fort Carson’s MS4 permit required water quality sampling where major water ways entered and exited the installation. Although no longer required, historical results are available upon request. Links to the permit, the SWMP, and annual reports are provided below.

Construction General Permit (CGP) - This permit addresses construction site runoff. Any construction activity that will execute ground disturbing activity is required to comply with this permit. Sites that disturb one or more acres of land are required to obtain coverage under the NPDES General Permit for Stormwater Discharges from Construction Activities (also known as the CGP). The current permit can be found at the "Construction General Permit" link below. All construction projects seeking coverage under the CGP need to file for a Notice of Intent (NOI). See the link "How to file an NOI" for directions from the EPA website. Prior to filing for a NOI, a Stormwater Pollution Prevention Plan (SWPPP) must be submitted to the Stormwater Program and approved. Please see the "Stormwater Pollution Prevention Plan (SWPPP) Template" link below. In addition to the permittee's regular stormwater inspections, which will be outlined in the SWPPP, a member of the Stormwater Program will perform quarterly inspections of the site. When the project is complete and the site has at least 70 percent growth in re-seeded and vegetated areas, a Notice of Termination (NOT) must be filed with the EPA to release the permittee from coverage under their NOI. A member of the Stormwater Program must approve the site before an NOT is filed. Links to helpful documents can be found below.

Multi-Sector General Permit (MSGP) - This permit addresses stormwater runoff from industrial sites, such as motorpools, recycling facilities, airfields, etc. The MSGP for both Fort Carson (COR05F003) and PCMS (COR05F002) went in to effect on October 2, 2015, and expire on June 4, 2020. The MSGP requires Fort Carson and PCMS to develop a SWPPP for all facilities that fall under the scope of this permit. Facilities covered under the permit are required to have a copy of their SWPPP map, know how to obtain the full SWPPP (from this website) and post additional information about the MSGP at their individual site. The consolidated SWPPP is available below. Certain information has been redacted and can be provided upon request through the Stormwater Program Manager. This permit requires multiple inspections throughout the year at the 80+ sites on Fort Carson that fit the definition of a sector-related industrial activity. Analytical and visual water quality samples of runoff are also taken at these sites periodically through the year. All information is summarized in an annual report to the EPA.

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Stop Illicit Discharges!

Illicit Discharges are defined as any discharge of water to the Municipal Separate Storm Sewer System (MS4) that is not entirely composed of stormwater. This includes drainage, release or disposal of pollutants in stormwater from industrial activity and construction sites. Please report Illicit Discharges or non-compliance from construction sites to the Fort Carson Stormwater Manager at (719) 526-1697 or via email at

Documents and References:

Municipal Separate Storm Sewer System

Construction General Permit

Multi-Sector General Permit

Low Impact Development (LID)

Useful Resources