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    City of Missoula

    Excerpts from Missoula stormwater management program

    Part II.A.2. – The permittee shall maintain documentation describing how and why each of the BMPs and measurable goals for the SWMP was selected. Part II.B.5.b. – The permittee shall maintain documentation with respect to the decision process used for the development of a post-construction storm water program. This documentation must address both the overall post-construction storm water program and the individual BMPs, measurable goals, and responsible persons/positions for the program.

    Part II.B.5.b.i. – Identify how the program to address storm water runoff from new development and redevelopment projects was developed. Include in this description any specific priority areas for this program.

    Part II.B.5.b.iii. – Identify any non-structural BMPs in the program, including, as appropriate:

    • Policies and ordinances that provide requirements and standards to direct growth to identified areas, protect sensitive areas such as wetlands and riparian areas, maintain and/or increase open space (including a dedicated funding source for open space acquisition), provide buffers along sensitive waterbodies, minimize impervious surfaces, and minimize disturbance of soils and vegetation;
    • Policies or ordinances that encourage infill development in higher density urban areas, and areas with existing storm sewer infrastructure;
    • Education programs for developers and the public about project designs that minimize water quality impacts; and
    • Other measures such as minimization of the percentage of impervious area after development, use of measures to minimize directly-connected imperious areas, and source control measures often thought of as good housekeeping, preventative maintenance, and spill prevention.

    Part - Identify how the long-term operation and maintenance (O&M) of the selected BMPs will be ensured. Options to help ensure that future O&M responsibilities are clearly identified include an agreement between the permittee and another party such as the post-development landowners or regional authorities.

    Part II.B.5.b.vii. – Identify who is responsible for overall management and implementation of the construction site storm water control program and, if different, who is responsible for each of the BMPs identified for this program.

    Part II.B.5.b.viii. – Identify how the success of this minimum control measure will be evaluated, including how the measureable goals for each of the BMPs were selected. Part III.A.1. – The permittee's SWMP must include a section describing how the SWMP will control discharges of pollutants of concern and ensure storm water discharges will not cause or contribute to instream exceedances of water quality standards. This discussion must specifically identify measures and BMPs that will collectively control the discharges of pollutants of concern.

    Excerpts fromStormwater Ordinance 3580 Chapter 13-27

    13.27.300 Requirement to Control and Reduce Storm Water Pollutants

    A. The City’s Storm Water Management Plan and Storm Water Specifications and Design Standards outline appropriate BMPs to control the volume, rate, and potential of pollutants in storm water runoff from new development and redevelopment projects as may be appropriate to minimize the generation, transport, and discharge of pollutants.

    B. Any owner or operator engaged in activities or operations which will or may result in pollutants entering storm water, the MS4, or state waters shall implement BMPs to the maximum extent practicable to provide protection from discharge into the MS4. BMPs shall be provided and maintained at the owner or operator’s expense. The Public Works Director shall have the authority to require the installation, operation, maintenance, and/or replacement of BMPs as well as the authority to order the removal of temporary BMPs.

    13.27.310 Requirement to Monitor and Analyze

    The City may require any owner or operator engaged in any activity or owning or operating any facility which may cause or contribute to storm water pollution, illicit discharges, or non-­stormwater discharges to the MS4 or state waters to undertake, at the owner or operator’s expense, monitoring and analysis by a state certified laboratory pursuant to the provisions of this chapter and furnish those reports to the Public Works Department as deemed necessary to determine compliance with this chapter as well as the Storm Water Specifications and Design Standards


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