Environmental Rules in Cheyenne, WY (2026)
4 verified environmental rules for Cheyenne, Wyoming, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Cheyenne bans dumping anything but rain into the storm drain system, and the city engineer enforces it under the Urban Stormwater Quality Management ordinance.
Cheyenne Storm Drain Discharge Ban
Significant RestrictionsCheyenne City Code 13.28.090
No person shall discharge or cause to be discharged into the municipal storm drain system or watercourses any materials, including, but not limited to, pollutants or waters containing any pollutants that cause or contribute to a violation of Wyoming Water Quality Standards, other than stormwater. The commencement, conduct or continuance of any illegal discharge to the storm drain system is p...
Erosion Control
Any construction project in Cheyenne covered by a WYPDES construction stormwater permit must comply with that permit's erosion and sediment control terms, and the city engineer can demand proof of compliance before issuing site plans or building permits.
Cheyenne Erosion and Sediment Control Permit Rule
Some RestrictionsCheyenne City Code 13.28.120
Any person subject to an industrial or construction activity WYPDES stormwater discharge permit shall comply with all provisions of such permit. Proof of compliance with said permit may be required in a form acceptable to the city engineer prior to or as a condition of a subdivision map, site plan, building permit, or development or improvement plan; upon inspection of the facility; during any ...
Flood Zones
New homes and additions in Cheyenne's mapped flood hazard areas need a development permit and must sit at least one foot above the base flood elevation.
Cheyenne Floodplain Development Rules
Some RestrictionsCheyenne City Code 13.24.150
New construction and substantial improvement of any residential structure shall have the lowest floor (including basement), elevated one foot above the base flood elevation. A registered professional engineer, architect or land surveyor shall submit a certification to the floodplain administrator that the standard of this subsection ... is satisfied.
Flood Elevation Requirements
Cheyenne requires new and substantially improved structures in mapped flood hazard areas to sit at least one foot above the base flood elevation, verified by a licensed engineer, architect, or surveyor.
Cheyenne 1-Foot Freeboard Above Base Flood
Some RestrictionsCheyenne City Code 13.24.150(A)(1)
New construction and substantial improvement of any residential structure shall have the lowest floor (including basement), elevated one foot above the base flood elevation. A registered professional engineer, architect or land surveyor shall submit a certification to the floodplain administrator that the standard of this subsection is satisfied.