Post-Construction Facility Requirements 

All new and redevelopment projects that meet the regulatory threshold (5000 sq. ft.) or more of developed area are required to manage site runoff using a post-construction facility. The City of Bozeman Design and Construction Standards – Oct. 2024, contain specific siting and sizing requirements.

Post-Construction Facility Design Guidance

Montana Post-Construction Stormwater BMP Design Guidance Manual - This cities of Montana prepared this manual to assist planning and engineering professionals with selecting, designing, constructing, and maintaining post-construction stormwater facilities. The information presented in the manual is the result of extensive research and the combined expertise of stormwater professionals in Montana and throughout the United States. Please contact the Stormwater Division with questions.

Green Stormwater Infastructure (GSI)

GSI is a nature-based approach that manages rainwater where it falls. By utilizing soil, plants, and permeable materials, GSI filters out pollutants and allows water to slowly soak into the ground. In turn, GSI helps to reduce flooding and to improve water quality. Examples of GSI include rain gardens, bioswales, and permeable concrete pavers. To learn more about GSI visit the EPA’s Green Stormwater Infrastructure webpage.

Example of GSI Projects in Bozeman