News and Events 

Engagement Opportunity

The Bozeman Stormwater Division is holding two (2) community engagement events for HOA’s, property management companies, and others who would like to provide input for improving our post-construction policies. Topics covered in the engagement sessions include:

• City owned stormwater pond inspection and maintenance program,
• HOA and privately owned stormwater pond inspections and maintenance,
• HOA and privately owned stormwater pond inspection and maintenance Enforcement Response Plan,
• Bozeman Municipal Code updates, and
• Funding

Please RSVP to fgreenhill@bozeman.net or aoliver@bozeman.net if you would like to attend.

Monday, July 22, 2024                                                Thursday, July 25, 2024

5:30pm – 7:30pm                                                          1:00pm - 3:00pm

Stormwater Division                                                    Stormwater Division

7 E. Beall St. Ste. 100                                                    7 E. Beall St. Ste. 100    

Stormwater Facilities Plan Update

Our stormwater system is something that many people don't really think about, but this piece of infrastructure is critical. Having a good functioning stormwater system ensures that properties don't get damaged from flooding, and that harmful pollutants that get washed into it from rainfall and snowmelt are mitigated. We're looking at updating our Stormwater Facilities Plan to improve our existing policies around stormwater management, plan for future capital infrastructure investments, and respond to changes in regulations. You can help us by learning more and engaging as opportunities to discuss this work arise. Check out engage.bozeman.net/stormwater to follow this project!

Construction Site Stormwater Management Trainings

Montana DEQ requires all Stormwater Pollution Prevention Plan (SWPPP) Preparers and Administrators be certified by an approved training provider. Below is a list of upcoming SWPPP trainings offered by Montana DEQ approved trainers.

Trainer: Altitude Training Associates

Courses & Dates:

BMP 101 - Introduction to Stormwater Management: March 18, 2025 (Online)

BMP 201R - Recertification for SWPPP Administrators & Preparers: March 19, 2025 (Online)

BMP 201 SWPPP Administrator & Preparer Certification: March 25 - 26, 2025 (In-person. Bozeman, MT)

Location: Bozeman, Montana and Live Online

Contact & Registration: (970) 317-4308, scott@altitudeta.com, www.altitudeta.com

 2023 Pollution Reduction  & Storm Sewer Maintenance Totals

Stormwater runoff picks up pollutants such as sediment, trash, dog waste, and oils as it flows over streets, parking lots, and other hard surfaces before discharging to local waterways. Our runoff is not treated at a treatment plant before discharging to a waterway. In order to mitigate impacts from polluted stormwater discharges to our local waterbodies, the City of Bozeman has installed 29 stormwater treatment units designed to remove much of the pollution carried by runoff. The Stormwater Division monitors the amount of pollution captured by each treatment unit on an annual basis and is proud to report that 94 tons (188,000lbs) of pollution was captured in 2023!

• Bozeman Creek Watershed: 73.25 tons of pollution captured
• Mandeville Creek Watershed: 6.19 tons of pollution captured
• E. Gallatin River Watershed: 14.6 tons of pollution captured

The City of Bozeman’s storm sewer serves two purposes: (1) mitigate flood risk by collecting runoff from streets, parking lots, alleyways, and other hard surfaces, and (2) treat stormwater by capturing sediment, trash, and other pollutants in their sumps. The storm sewer requires regular maintenance, including vacuuming and flushing, to stay functional. Stormwater Operations Staff completed the following maintenance in 2023:

• 455 inlets and manhole sumps vacuumed
• 7.4 miles of pipes flushed
• 9 miles of pipe TV inspected
• 5 spot repairs

Regular maintenance of the storm sewer resulted in 51 TONS of pollution collected!! Between pollution captured by treatment units and regular storm sewer maintenance, a total of 145 TONS of pollution was removed in 2023!! If not for the hard work of Stormwater Division operators, this pollution would have been destined for our beloved local waterways.

Cured in Place Pipe Project

The Stormwater Division completed a major pipe rehabilitation project beneath the alleyway between Main St. and Mendenhall St. The existing pipe was a 100+ year old, 27” - 36” diameter, hand-placed clay tile pipe, conveying stormwater runoff from over 270 acres. Instead of digging up and replacing the old degraded pipe, a trenchless method was employed. Crews slipped a liner impregnated with resin through the inside of the pipe, expanded it with compressed air, and then cured it with UV light. This method of trenchless pipe rehabilitation is called Cured-In-Place Pipe (CIPP), and is expected to add a minimum of 50 years of life to the pipe. Construction costs totaled $481,095, a fraction of the estimated $2-3 million price tag of traditional excavation and pipe replacement. Additionally, the CIPP project had minimal disruption to downtown business and visitors compared to a traditional excavation project.

        Before CIPP Project                                             After CIPP Project