Document Kalispell_doc_73b0671b27

1/1/2017 STORMWATER MANAGEMENT PROGRAM Permit Years 2017-2021 Permit No: MTR040005 ---PAGE BREAK--- 1 Contents 1 Purpose of Program 2 2 Description of Permit Area 2 3 Summary of Stormwater Regulations and Program Requirements 2 3.1 Effluent Limits 3 3.2 Stormwater Management Program (SWMP) Requirements 3 3.3 Training 4 3.4 Special Conditions 4 3.5 Monitoring and Reporting 5 4 Six Minimum Control Measure Management Program 5 4.1 Public Education and Outreach 5 4.2 Public Involvement and Participation 8 4.3 Illicit Discharge Detection and Eliminations 9 4.4 Construction Site Stormwater 14 4.5 Post Construction Site Stormwater Management in New Development and Redevelopment . 16 4.6 Pollution Prevention/Good Housekeeping for Permittee Operations 21 5 Training 24 5.1 Stormwater Management Team 24 5.2 Field Management-IDDE 24 5.3 Construction Site Stormwater Management 25 5.4 Post-Construction Stormwater Management 25 5.5 Field Management-PPGH 25 6 Stormwater Management for Discharges to Impaired Waterbodies 25 6.1 Nutrients-Total Phosphorus (TP) and Total Nitrogen (TN) 26 6.2 Dissolved Oxygen 27 6.3 Sediment 28 6.4 Temperature 30 7 TMDL Action Plan 30 8 Self-Monitoring 31 9 SWMP Management Team, Responsibilities, and Communications 31 9.1 SWMP Management Team 32 9.2 SWMP Management Team Communication 34 Appendix A-Drainage Basin and Outfall Summary 35 ---PAGE BREAK--- 2 1 Purpose of Program Stormwater management is increasingly important for the purpose of maintaining clean water and preserving waterbodies such as streams, rivers, and lakes. A General Permit for Stormwater Discharge Associated with Small Municipal Separate Storm Sewer System (MS4) or “MS4 General Permit” was approved for the City of Kalispell in July of 2006 and subsequent reapprovals in 2009 and 2015. The MS4 General Permit provides authorization to discharge stormwater to waters of the state under the Montana Pollutant Discharge Elimination System (MPDES). The MS4 General Permit requires the City to develop, document, and maintain a Stormwater Management Program (SWMP) which includes management practices, control techniques, systems, designs, good standard engineering practices, and such other provisions necessary to reduce the discharge of pollutants from the permitted Small MS4 to the Maximum Extent Practical (MEP). The objective of this Stormwater Management Program (SWMP) is to develop and effectively manage a stormwater program inclusive of the six minimum control measures and reduce pollutant contribution from the City’s MS4 to waterbodies. This program was developed to meet state and federal program requirements, but also utilize current SWMP activities, address issues that are important to the community, and establish programs that are economically feasible. 2 Description of Permit Area The City of Kalispell’s permitted area is bound by its city limits. The city limits in 2016 encompassed 11.91 square miles. The permitted area includes seventy two drainage basins of which fifty six outfall to perennial surface waters. Within the permitted area the city and Montana Department of Transportation (MDT) operate and maintain multiple separate storm sewer systems. The city and MDT are no longer co-permitees, but utilize the same outfalls throughout the city limits. There are six named or perennial surface waters that receive stormwater discharges from the City of Kalispell’s MS4. These receiving waters are as follows: • Whitefish River • Stillwater River • Ashley Creek • Spring Creek • Little Spring Creek-aka Kids Creek or Unnamed perennial surface water tributary to Spring Creek • Unnamed perennial surface water tributary to Ashley Creek from Foys Lake 3 Summary of Stormwater Regulations and Program Requirements The Montana Pollutant Discharge Elimination System (MPDES) General Permit MTR040000 is a fourth- generation General Permit for stormwater discharges associated with Small Municipal Separate Storm Sewer Systems (MS4s). Regulated Small MS4s are required to apply for and obtain authorization for the discharge of stormwater into state waters per requirements of the MS4 General Permit. To maintain permit coverage, permittees are required to adhere to all permit requirements and are responsible for: • Maintaining Effluent Limits ---PAGE BREAK--- 3 • Stormwater Management Program Development/Implementation • Training Development/Implementation • Special Conditions for Impaired Waters • Monitoring, Recoding, and Reporting 3.1 Effluent Limits The following conditions apply to all Small MS4s covered under the MS4 General Permit. There must be no discharge of pollutants via stormwater runoff to state waters except as provided below: • Implementation of Best Management Practices (BMPs) consistent with the provisions of the Stormwater Management Program (SWMP) and the requirements in the MS4 General Permit shall constitute compliance with the requirement of reducing pollutants to the maximum extent practicable (MEP). • Discharges of stormwater containing pollutants associated with Small MS4s covered under the MS4 General Permit will be controlled through the development, implementation, and enforcement of a SWMP designed to reduce the discharge of pollutants from the permitted Small MS4 to the MEP, to protect water quality, and to satisfy the appropriate water quality requirements of the Montana Water Quality Act (MWQA). • For regulated Small MS4s which have been designated through ARM 17.30.1102(23) and had initial authorization under the preceding January 1, 2005 to December 31, 2009 General Permit for Stormwater Discharge Associated with Small Municipal Separate Storm Sewer System, the permittee was required to develop, implement, and enforce a SWMP, as stated in Part II of the 2005 MS4 General Permit, no later than the December 31, 2009 expiration date. This requirement is still valid and binding under this reissued January 1, 2017 to December 31, 2021 MS4 General Permit for Stormwater Discharge Associated with Small Municipal Separate Storm Sewer System (MS4), although for the new inclusions or revisions to the SWMP as stated in the reissued 2017 MS4 General Permit, the permittee must develop, implement, and enforce those additional or revised components as per the implementation timeframe specified. 3.2 Stormwater Management Program (SWMP) Requirements The MS4 General Permit requires permittees to develop, document, and maintain a SWMP which includes best management practices, control techniques, systems, designs, good standard engineering practices, and such other provisions necessary to reduce the discharge of pollutants from the permitted Small MS4 to the MEP. The SWMP describes required Best Management Practices(BMPs) and implementation schedules for each BMP. DEQ requires that BMPs are selected, designed, installed, implemented, inspected, and maintained (or replaced based on inspections) in accordance with good engineering, hydrologic, and pollution control practices. The SWMP must include and the permitee shall effectively manage a program inclusive of the following six minimum control measures: 1. Public Education and Outreach on Stormwater Impact 2. Public Involvement / Participation 3. Illicit Discharge Detection and Elimination (IDDE) 4. Construction Sites Stormwater Runoff Control 5. Post Construction Stormwater Management for New Development and Redevelopment ---PAGE BREAK--- 4 6. Pollution Prevention/Good Housekeeping for Municipal Operations All permittees must develop a stormwater management team, including a primary SWMP Coordinator, and organizational chart which identifies the position responsible for implementing each minimum measure. Any updates to this information shall be submitted with Annual Reports. During the entire permit term, all permittees must establish, document, and execute formalized mechanisms for regular communication between stormwater management team members to allow for exchange of information and submittal of information necessary for permit compliance tracking and reporting. The City of Kalispell’s current 2015-2016 SWMP will be used and improved upon to meet the new permit requirements. 3.3 Training The permittee is required to conduct and/or coordinate the following training and track/document all municipal staff participating in the following areas: 1. Stormwater Management Team permit education and implementation responsibilities. 2. Stormwater awareness for city field staff specifically addressing stormwater impacts, the permit, detection and elimination of illicit discharges, and BMPs to minimize discharge of pollutants during city activities or operations. 3. Inspector and plan review staff responsible for construction site stormwater management. 4. Inspector and plan review staff responsible for post-construction stormwater management in new development and redevelopment. 5. Staff responsible for implementation of Standard Operating Procedures (SOPs) developed as a requirement of the Pollution Prevention/Good Housekeeping Minimum Measures. 3.4 Special Conditions 3.4.1 Impaired Waterbodies Pre-TMDL The permittee's Stormwater Management Plan (SWMP) must identify all outfalls that discharge to impaired waterbodies, the impaired waterbodies, and the associated pollutant(s) of impairment. Additionally, the permittee’s SWMP must include a section that describes BMPs that target and reduce discharges of the identified pollutant(s) of impairment to impaired waterbodies without an approved pollutant Total Maximum Daily Load (TMDL). The permittee’s Annual Report must contain a summary of BMPs implemented over the reporting period and a schedule of BMPs planned for the following year. Currently there are no Pre TMDL Impaired Waterbodies receiving city stormwater discharges. 3.4.2 Impaired Waterbodies with Approved TMDL Wasteload Allocations (WLAs) The permittee’s SWMP must identify all outfalls that discharge to impaired waterbodies with an approved TMDL WLAs, the impaired waterbodies, and the associated pollutant(s) of impairment. This information will be submitted with each Annual Report. The permittee must include in its SWMP a section identifying the measures and BMPs it plans to implement, describing the MS4’s impairment priorities and long term strategy, and outlining interim milestones a completion schedule for action items) for controlling the discharge of the pollutants of concern and making progress towards meeting the TMDL. ---PAGE BREAK--- 5 The permittee must supplement the Self-Monitoring Requirements in Part IV of the MS4 General Permit with additional monitoring targeted at further evaluating MS4 loading to impaired waterbodies (Option 1) or at evaluating the effectiveness of BMPs selected for reducing MS4 loading to impaired waterbodies (Option The TMDL section of the SWMP must be submitted in the 4th Year Annual Report for MDEQ approval, and begin to be implemented no later than the beginning of the 5th permit year. 3.5 Monitoring and Reporting All permittees are required to perform sampling, testing, and reporting of stormwater discharges from their Small MS4s under this MS4 General Permit, or as otherwise required by the department. Permittees are required to choose one of two monitoring options and submit their selected option to the department with their application for MS4 General Permit coverage. Sampling, testing, and reporting must be conducted at least semi-annually (two times per year) for each of the parameters listed in the MS4 General Permit. Monitoring results shall be used by permittees to self-evaluate measures taken to improve the quality of stormwater discharges. An Annual Report is required to be prepared and submitted by the permittee to the department for each calendar year within the MS4 General Permit term by March 1st. The Annual Report is a descriptive summary of the permittee’s past year performance and accomplishments, evaluation of SWMP effectiveness, proposed updates, changes or improvements. 4 Six Minimum Control Measure Management Program The MS4 General Permit requires development, implementation and management of Best Management Practices (BMPs) for the six minimum control measures necessary to reduce the discharge of pollutants from the permitted Small MS4. DEQ requires that BMPs are selected, designed, installed, implemented, inspected, and maintained (or replaced based on inspections) in accordance with good engineering, hydrologic, and pollution control practices. This section describes the minimum measure’s BMPs and provides: • A description of the BMP. • The rational for BMP selection. • The implementation activity and schedule for each year of the 2017-2021 permit cycle. 4.1 Public Education and Outreach The permittee is required to implement a stormwater public education program to develop or adapt, distribute, and evaluate educational materials and outreach activities to key target audiences in the MS4. The program will raise awareness about the impacts of stormwater discharges on waterbodies, educate audiences about the behaviors and activities that have the potential to pollute stormwater discharges, and motivate action to change behaviors to reduce pollutants in stormwater runoff. ---PAGE BREAK--- 6 An effective public education program can significantly reduce other program costs such as inspection and enforcement costs for the illicit discharge program. Informed citizens and business owners will usually take steps to reduce potential pollution from their own activities. As specified in the MS4 General Permit, the following BMPs will be continued from previous permit cycles with updates to include new MS4 General Permit requirements or new BMPs will be developed and implemented throughout the current permit cycle. STORMWATER OUTREACH PROGRAM PE-1 DESCRIPTION: The Stormwater Outreach Program develops and formalizes distribution of educational materials and outreach activities to key target audiences in the MS4 that raise awareness about the impacts of stormwater discharges on waterbodies, educate audiences about the behaviors and activities that have the potential to pollute stormwater discharges, and motivate action to change behaviors to reduce pollutants in stormwater runoff. The current program will be updated to meet the requirements of the current MS4 General Permit. RATIONAL FOR SELECTION: Stormwater Outreach Program provides the educational material for source of pollution, target audience, and distribution sources for the current permit cycle. Meets MS4 General Permit requirements. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017 Determine key target audiences and relative pollutant source 1st Annual Report 2018 1. Develop outreach message which promotes benefits of non- polluting behaviors to key target audience and benefits to stormwater discharge a. Analyze business/residential type and behaviors that are common source of illicit discharges, spill, and dumping b. Develop list, description, and rational for selection of key target audience and associated pollutants 2. Develop outreach format and distribution channels 3. Update current program to meet MS4 General Permit requirements 2nd Annual Report 2019- 2021 Distribute outreach material to target audiences 3rd, 4th, 5th Annual Report ---PAGE BREAK--- 7 STORMWATER OUTREACH WEBSITE PE-2 DESCRIPTION: Maintain a stormwater website for access by key target audiences, interested stakeholders, and the general public. The current Stormwater Website will be updated to meet the requirements of the current MS4 General Permit. RATIONAL FOR SELECTION: Stormwater Outreach Website provides access to stormwater outreach material, permit documents, and a mechanism for public input. Meets MS4 General Permit requirements. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017 Develop and update website available to public containing: 1. Link to MS4 General Permit 2. Access to outreach material and events 3. SWMP documents and updates 4. Annual Reports 5. Mechanism for receiving public input on SWMP 6. Information on illicit discharges-how to identify and report 7. Information of construction activities and complaints 1st Annual Report 2018- 2021 Maintain website and update as required annually 2nd, 3rd, 4th, 5th Annual Report ---PAGE BREAK--- 8 4.2 Public Involvement and Participation The permittee is required to develop a strategy to involve key target audiences in the development and implementation of the SWMP that complies with state and local public notice requirements. The public can provide valuable input and assistance to a municipal stormwater management program. An active and involved community is crucial to the success of a stormwater management program. It allows for broader public support since the citizens who participate in the development and decision making processes are responsible for the programs. As specified in the MS4 General Permit, the following BMPs will be continued from previous permit cycles with updates to include new MS4 General Permit requirements or new BMPs will be developed and implemented throughout the current permit cycle. PUBLIC INVOLVEMENT PROGRAM PI-1 DESCRIPTION: The Public Involvement Program involves continuing current public participation programs and updating the program by identifying approaches for involving key target audiences in SWMP development and implementation. RATIONAL FOR SELECTION: The public can provide valuable input and assistance to a municipal stormwater management program. An active and involved community is crucial to the success of a stormwater management program. It allows for broader public support since the citizens who participate in the development and decision making processes are responsible for the programs. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017 1. Identify approaches for involving the key target audience identified in PE-1. For each key audience describe the approach, target to for implementation, and purpose of involvement approach. 2. Id existing organization with memberships that represent some or all of the key target audiences. 3. Describe opportunities for partnering to involve organization with SWMP development and implementation. 4. Document collaboration with organization if this is an approach for involving key target audiences. 5. Continue the following Participation Programs if feasible: a. Stormwater Advisory Committee Meetings b. Storm Drain Identification Program c. Charity Carwash Program d. Student Participation in Stormwater Awareness 1st Annual Report 2018- 2021 1. Update current program and implement identified involvement approaches for each key target audience. 2. Document participation and key target audience feedback on the approach. 2nd, 3rd, 4th, 5th Annual Report ---PAGE BREAK--- 9 PUBLIC INVOLVEMENT WEBSITE P1-2 DESCRIPTION: Maintain a stormwater website for advertising stormwater education and soliciting input from key target audiences, interested stakeholders, and the general public. The current Stormwater Website will be updated to meet the requirements of the current MS4 General Permit. RATIONAL FOR SELECTION: A Website specifically tailored to Stormwater Outreach provides the means for the public to access stormwater outreach material, permit documents, and solicit input. Meets MS4 General Permit requirements. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017 Develop and update website available to public containing: 1. Access to outreach material 2. SWMP documents and updates 3. Annual Reports 4. Mechanism for receiving public input on SWMP 5. Information on illicit discharges-how to identify and report 6. Information on recent or current outreach event information 1st Annual Report 2018- 2021 Maintain website and update as required annually 2nd, 3rd, 4th, 5th Annual Report 4.3 Illicit Discharge Detection and Eliminations Discharges into storm conveyance systems often include wastes and wastewater from non-stormwater sources. A portion of these dry weather flows are from illicit and inappropriate discharges and connections to the storm conveyance systems. Illicit discharges enter the system through either direct or indirect connections. The results are untreated discharges that contribute high levels of pollutants, including heavy metals, toxins, oil and grease, solvents, nutrients, viruses, and bacteria to receiving streams and rivers. Pollutant levels from these illicit discharges have been shown in EPA studies to be high enough to significantly degrade receiving water quality, threaten aquatic wildlife, and human health. The permittee is required to develop, implement and enforce a program to detect and eliminate illicit discharges into the permitted Small MS4. As specified in the MS4 General Permit, the following BMPs will be continued from previous permit cycles with updates to include new MS4 General Permit requirements or new BMPs will be developed and implemented throughout the current permit cycle. ---PAGE BREAK--- 10 ASSESSMENT OF “SIGNIFICANT” NON-STORMWATER DISCHARGES IDDE-1 DESCRIPTION: Evaluate non-stormwater discharges the City would consider as a significant contributor of pollutants. This list excludes non-stormwater discharges the City considers to be occasional incidental and are exempt per City Ordinance 1634. RATIONAL FOR SELECTION: Assesses and evaluates illicit discharges annually to ensure significant pollutants are not introduced into the receiving waters. Meets MS4 General Permit requirements. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017- 2021 1. Evaluate a list of non-stormwater discharges identified as significant contributor of pollutants. 2. List pollutants associated with each non-stormwater significant contributor. 3. Document and track local controls or conditions place on these discharges. 1st, 2nd, 3rd, 4th, 5th Annual Report ASSESSMENT OF “OCCASIONAL INCIDENTAL” NON-STORMWATER DISCHARGES IDDE-2 DESCRIPTION: Evaluate exempt non-stormwater occasional incidental discharges as identified in Ordinance 1634. The City has developed a list of occasional incidental non-stormwater discharges considered except as outlined in City Ordinance 1634. The City will assess the occasional incidental discharges and update ordinances if conditions change and the discharges are considered to be significant. RATIONAL FOR SELECTION: Assesses and evaluates illicit discharges annually to ensure only non- significant pollutants are introduced into the receiving waters. Meets MS4 General Permit requirements. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017- 2021 1. Evaluate list of non-stormwater discharges that the City has determined will not be addressed as illicit discharges in Ord 1634. 2. List pollutant associated with each non-stormwater non- significant contributor. 3. Document and local control or condition place on these discharges. 1st, 2nd, 3rd, 4th, 5th Annual Report 2018 Update ordinance to include a provision prohibiting an occasional incidental non-stormwater discharge that is determined to be contributing a significant amount of pollutants. 2nd Annual Report ---PAGE BREAK--- 11 KALISPELL STORMWATER SYSTEM MAPPING IDDE-3 DESCRIPTION: Kalispell stormwater map captures global position system (GPS) locations of current storm conveyance systems including pipes, manholes, ditches, and outfalls within the city limits. The map is updated annually. RATIONAL FOR SELECTION: The map inventories stormwater sewer infrastructure to thoroughly track illicit discharges, contain spills, and determine high priority areas. Meets MS4 General Permit requirements. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017 1. Update existing map showing location and number of outfalls and the names and location of all surface water that receive discharges from those outfalls. 2. Update map showing high priority areas. 1st Annual Report 2018- 2021 Update map annually 2nd, 3rd, 4th, 5th Annual Report ILLICIT DISCHARGE ORDINANCE AND ENFORCEMENT RESPONSE PLAN (ERP) IDDE-4 DESCRIPTION: Ordinance 1634, adopted in 2008, establishes regulations controlling the introduction of pollutants into the City’s Municipal Separate Storm Sewer System (MS4). The ordinance prohibits illicit discharges and illegal connections to the MS4, as well as sanctions to ensure compliance to the extent allowable under state and local law. An Enforcement Response Plan (ERP) will be developed for illicit discharges and Ordinance 1634 will be updated accordingly to meet MS4 General Permit requirements. RATIONAL FOR SELECTION: The Phase II MPDES regulations require the establishment of a regulatory mechanism to prohibit illicit discharges. City Ordinance 1634 establishes a regulation controlling and removing the introduction of illicit pollutants into the City’s MS4. Meets MS4 General Permit requirements. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017 Continue implementation and enforcement of current ordinance 1st Permit Year 2018 1. Review and update ordinance as needed to meet significant discharge assessment conclusions. 2. Develop and implement a formal ERP for illicit discharges and update ordinance to meet ERP requirements as outlined in the MS4 General Permit. 2nd Annual Report 2019- 2021 Continue implementation and enforcement of current ordinance Annually ---PAGE BREAK--- 12 IDDE COLLABORATION WITH NEIGHBORING MS4 -MDT IDDE-5 DESCRIPTION: Collaborate with MDT (neighboring MS4s) as necessary to detect and eliminate illicit discharges. RATIONAL FOR SELECTION: Collaboration with neighboring MS4 permittee increases the potential to detect and eliminate illicit discharges in a watershed. Meets MS4 General Permit requirements. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017 Continue collaboration as necessary. 1st Permit Year 2018 1. Solicit assistance from neighboring MS4s as necessary to detect and eliminate illicit discharges. 2. Formalize cooperative agreements as necessary to implement the IDDE program. Agreements should specify investigation and enforcement responsibilities. 3. Submit summary of agreement in second Annual Report. 2nd Annual Report 2019- 2021 Continue neighborly collaboration and agreement objectives. Annually ---PAGE BREAK--- 13 ILLICIT DISCHARGE DETECTION AND ELIMINATION (IDDE) PROGRAM IDDE-6 DESCRIPTION: Kalispell’s IDDE program was developed in 2008 and is used to detect and address illicit discharges to the municipal storm conveyance systems. The measures used to accomplish the goals of the program are as follows: • Audit storm system • Assess illicit discharge potential • Dry weather screening (inspect and screen all outfalls by the end of the permit cycle) • High/Low priority outfalls screening • Investigation and Correction Action Plan • Execution of Enforcement Actions A complete copy of the IDDE Program can be obtained at the Public Works Department front office. The IDDE Program will be reviewed, updated, and protocol implement as required to meet the new requirement of the MS4 General Permit. RATIONAL FOR SELECTION: Participation in the IDDE Program enables the city to implement and enforce a program to detect and eliminate illicit discharges. Meets MS4 General Permit requirements. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017 1. Review IDDE Program and update to meet new permit requirements. Incorporate inspection and screening schedule for all of the city’s outfalls during permit cycle. 2. Develop an illicit discharge investigation and corrective action plan. Incorporate into IDDE Program. 1st Annual Report 2018 1. Update IDDE Program- use inspection and screening results to determine high priority outfalls. Priority determination is outlined in permit. 2. Submit the list of high-priority outfall with each remaining Annual Reports. List may change with additional annual screenings. 3. Implement illicit discharge investigation and corrective action plan. 4. Maintain documentation of investigation/correction and submit incidents with every Annual Report. 2nd Annual Report 2019- 2021 1. Inspect and screen high priority outfalls 2. Submit a summary of screening results 3. Reevaluate additional high priority sites determined from annual screening. 3rd, 4th, 5th Annual Report ---PAGE BREAK--- 14 4.4 Construction Site Stormwater Sediment from construction sites is considered a leading cause of water quality problems. During a short period of time, construction sites can contribute more sediment to streams than can be deposited naturally during several decades. The permittee is required to develop, implement and enforce a program to reduce pollutants in stormwater runoff to the permitted Small MS4 from construction activities. As specified in the MS4 General Permit, the following BMPs will be continued from previous permit cycles with updates to include new MS4 General Permit requirements or new BMPs will be developed and implemented throughout the current permit cycle. LAND DISTURBANCE ORDINANCE AND ENFORCEMENT RESPONSE PLAN C-1 DESCRIPTION: The City of Kalispell’s Ordinance 1600 “Stormwater Discharges Resulting from Construction and Land Disturbance Activities” establishes land disturbance, erosion, and sediment standards, as well as sanctions to ensure compliance to the extent allowable under state and local law. The ordinance outlines construction site stormwater management permit procedures, and ensures compliance and enforcement for construction site stormwater management. An Enforcement Response Plan (ERP) will be developed to ensure compliance with construction stormwater management regulatory mechanisms. Ordinance 1600 will be updated accordingly to meet MS4 General Permit requirements. RATIONAL FOR SELECTION: Ordinance 1600 establishes regulations controlling the introduction of pollutants into the City’s MS4 from land disturbance activities. Meets MS4 General Permit requirements. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017 1. Continue implementation and enforcement of current ordinance 2. Start review and development of ERP, submit documentation of progress toward creation of ERP in 1st Annual Report 1st Permit Year 2018 Continue implementation and enforcement of current ordinance 2nd Permit Year 2019 1. Review and update ordinance as needed to meet requirements established in the MDEQ General Permit for Stormwater Discharges Associated with Construction Activities. 2. Develop and adopt a formal ERP to ensure compliance with Ordinance 1600 and update ordinance to meet ERP requirements as outlined in the permit. 3rd Annual Report 2020 1. Implement ERP 2. Continue implementation and enforcement of ordinance 4th Permit Year 2021 Continue implementation and enforcement of ordinance 5th Permit Year ---PAGE BREAK--- 15 KALLISPELL CONSTRUCTION SITE STORMWATER MANAGEMENT C-2 DESCRIPTION: Kalispell’s Construction Site Stormwater Management is regulated through a permitting process outlined in Ordinance 1600 “Stormwater Discharges Resulting from Construction and Land Disturbance Activities”. Administration of the permitting process is performed by Public Works and includes a policy for construction site plan review, management of project inventory, inspection protocol and frequency, and enforcement protocol. RATIONAL FOR SELECTION: Construction Site Stormwater Management Permitting is a component of Ordinance 1600 “Stormwater Discharges Resulting from Construction and Land Disturbance Activities”. The Kalispell permit program ensures compliance for construction site erosion and sediment controls. Meets MS4 General Permit requirements. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017 1. Develop protocol and checklist for construction stormwater management plan review that ensures requirements of current DEQ Construction Activity Permit have been included on all regulated construction stormwater management plans. a. Implement construction stormwater management plan review checklist and protocol. 2. Update existing inspection form to ensure consistent and thorough project site inspection that ensure requirements are meet of current DEQ Construction Activity Permit. a. Implement updated construction stormwater management inspection form. 3. Develop and maintain/update a construction site project inventory as described in the MS4 General Permit (4.c.iv). 4. Develop protocol for inspection frequency based on priority of project as described in MS4 General Permit 1st Annual Report 2018 Continue implementation and enforcement of Kalispell Construction Site Stormwater Management protocols. 2nd Permit Year 2019 1. Update Kalispell Construction Site Stormwater Management plan review/inspection protocols and documents as require with update of Ordinance 1600. 2. Continue implementation and enforcement of Kalispell Construction Site Stormwater Management protocols. 3rd Annual Report 2020- 2021 Continue implementation and enforcement of Kalispell Construction Site Stormwater Management protocols. 4th and 5th Permit Year ---PAGE BREAK--- 16 4.5 Post Construction Site Stormwater Management in New Development and Redevelopment Numerous studies have documented that stormwater runoff from developed sites contributes significant pollutant loads to receiving waters. The increase in impervious surfaces such as rooftops, roads, and parking lots can increase urban runoff and have a detrimental impact on aquatic systems due to increased concentrations of sediment, nutrients, road salts, heavy metals, pathogenic bacteria, and petroleum hydrocarbons. The best way to mitigate stormwater impacts from new development and redevelopment is to use practices to treat, store, and infiltrate runoff on-site before it can affect waterbodies. The permittee is required to develop, implement and enforce a program to address stormwater runoff from new development and redevelopment projects in the city. The program must ensure that controls are in place that would prevent or minimize water quality impacts. As specified in the MS4 General Permit, the following BMPs will be continued from previous permit cycles with updates to include new MS4 General Permit requirements or new BMPs will be developed and implemented throughout the current permit cycle. ---PAGE BREAK--- 17 CITY STANDARDS FOR DESIGN AND CONSTRUCTION AND ENFORCEMENT RESPONSE PLAN PC-1 DESCRIPTION: The City of Kalispell’s Standards for Design and Construction establishes post construction stormwater quality management controls for new and redevelopment projects. The post construction stormwater quality management controls are prescribed to meet the requirements depicted in the current MS4 General Permit. The City Standards for Design and Construction ensure the following requirements for this minimum measure: • Regulatory mechanism to address post construction runoff from new development and redevelopment. • Implementation of structural and non-structural practices to minimize water quality impacts, including Low Impact Development (LID) practices, where practicable. • Ensure long-term operation and maintenance of structural practices. An Enforcement Response Plan (ERP) will be developed to ensure regulatory mechanisms for compliance with design, installation, operation, and maintenance for post construction stormwater management controls. Ordinances will be developed or updated accordingly to meet MS4 General Permit requirements. RATIONAL FOR SELECTION: Kalispell implements and routinely updates the Standards for Design and Construction to comply with the MS4 General Permit to ensure controls are in place to prevent or minimize water quality impacts. The MS4 General Permit regulations require the establishment of a regulatory mechanism to require post construction stormwater quality management controls and enforcement mechanisms on regulated projects. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017 1. Review and update Standards for Design and Construction as needed to meet stormwater control performance standards described in MS4 General Permit (Part II.A.5.b.iii). 2. Review and update as necessary new development and redevelopment project plan review checklist to ensure and document compliance with MS4 General Permit requirements. 1st Permit Year/Annual Report 2018 1. Continue implementation of current Standards for Design and Construction. 2. Develop and implement an inspection form or checklist for post construction stormwater management controls for new/redevelopment projects to ensure proper construction. 2nd Permit Year/Annual Report 2019 Continue implementation of current Standards for Design and Construction. 3rd Permit Year 2020 1. Develop and adopt a formal ERP to ensure regulatory mechanisms for compliance with design, installation, operation, and maintenance for post construction stormwater management controls. 4th Annual Report 2021 1. Implement ERP 2. Continue implementation and enforcement of Standards for Design and Construction. 5th Permit Year ---PAGE BREAK--- 18 POST CONSTRUCTION STORMWATER MANAGEMENT PC-2 DESCRIPTION: Administration of stormwater post construction management is performed by Public Works and includes policy and protocols for installation, operation, maintenance, and regulatory compliance for stormwater quality management controls from new development and redevelopment projects. Management practices include: 1. Inventory and classifying projects for high priority stormwater quality management controls 2. Inspection programs, establishing protocols for inspection of stormwater quality management controls. Ensuring long term operations and maintenance of the control. 3. Ensuring regulatory mechanisms for compliance with installation, operation, and maintenance for post construction stormwater management controls. An Enforcement Response Plan (ERP) will be developed to ensure regulatory mechanisms for compliance with installation, operation, and maintenance for post construction stormwater management controls. Ordinances will be developed or updated accordingly to meet permit requirements. RATIONAL FOR SELECTION: Implements post construction stormwater management controls on regulated projects and implements required enforcement procedures and actions. Meets State General Permit requirements. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2018 1. Develop and maintain inventory (including description and locations) of all new permittee-owned and new private post construction stormwater management controls since 2017. 2. Develop protocol for inspection frequency of post construction stormwater management controls based on priority as described in MS4 General Permit (Part II.A.5.c.vi). 3. Develop a program to conduct annual inspections of Public and private high-priority post construction stormwater controls. a. Inspections can be performed by the municipality or oversight of city requiring self-inspection and reporting by property owners. 2nd Permit Year/Annual Report 2019 1. Develop and maintain inventory (including description and locations) of all existing permittee-owned and private high priority post construction stormwater management controls. a. Priority to be determined as described in MS4 General Permit (Part II.A.5.c.iv). 2. Inspect permittee-owned high priority post construction stormwater management controls annually. Document findings and resulting compliance actions. 3. Implement inspection program for privately owned high-priority post construction stormwater controls. Document findings and resulting compliance actions. 3rd Annual Report ---PAGE BREAK--- 19 POST CONSTRUCTION STORMWATER MANAGEMENT (Continued) PC-2 YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2020 1. Inspect permittee-owned high priority post construction stormwater management controls annually. Document findings and resulting compliance actions. 2. Implement inspection program for privately owned high-priority post construction stormwater controls. Document findings and resulting compliance actions. 3. Develop and adopt a formal ERP to ensure regulatory mechanisms for compliance with installation, operation, and maintenance for post construction stormwater management controls on private projects. 4. Update or create ordinance as needed to ensure regulatory mechanisms for compliance with installation, operation, and maintenance for post construction stormwater management controls on private property. 4th Permit Year/Annual Report 2021 1. Inspect permittee-owned high priority post construction stormwater management controls annually. Document findings and resulting compliance actions. 2. Implement inspection program for privately owned high-priority post construction stormwater controls. Document findings and resulting compliance actions. 3. Implement ERP for compliance with installation, operation, and maintenance for post construction stormwater management controls on private property. 5th Permit Year ---PAGE BREAK--- 20 LOW IMPACT DEVELOPMENT (LID) CONCEPT REVIEW PC-3 DESCRIPTION: The MS4 General Permit requires the permittee to review the feasibility of utilizing Low Impact Development (LID) concepts on public and private property, and identify opportunities to establish LID policies for new and redevelopment projects. RATIONAL FOR SELECTION: Participation in city department wide review of LID concepts, reviews feasibility implementation, barriers of implementation in current codes, ordinances, and policies, and identifies future opportunities for adoption and implementation of LID policies. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2020 Municipal internal review of LID concepts and barriers for implementation. Submit discussion and outcome summary with Annual Report. 4th Annual Report ---PAGE BREAK--- 21 4.6 Pollution Prevention/Good Housekeeping for Permittee Operations Municipalities conduct numerous activities that can pose a threat to water quality if practices and procedures are not in place to prevent pollutants from entering the MS4. These activities include winter road maintenance, minor road repairs, infrastructure work, automotive fleet maintenance, landscaping and park maintenance, and facility/ building maintenance. Pollution Prevention/Good Housekeeping for municipal operations minimum control measure is a key element of the MS4 Permittee stormwater management program. This measure requires the MS4 Permittee to examine and subsequently alter their own actions to help ensure a reduction in the amount and type of pollution that: collects on streets, parking lots, open spaces, storage and vehicle maintenance areas, and facility management are discharged into local waterways; and results from actions standard operating and maintenance practices of City infrastructure and facilities. The permittee is required to develop, implement an operation and maintenance program which includes a training component, and has the ultimate goal of preventing or reducing pollution runoff from the permittee operations. As specified in the MS4 General Permit, the following BMPs will be continued from previous permit cycles with updates to include new MS4 General Permit requirements or new BMPs will be developed and implemented throughout the current permit cycle. ---PAGE BREAK--- 22 POLLUTION PREVENTION/GOOD HOUSEKEEPING GUIDANCE MANUAL AND TRAINING GH-1 DESCRIPTION: The Kalispell Municipal Pollution Prevention/Good Housekeeping Guidance Manual presents a summary of city fixed facilities, field operations, standard operation protocols for good housekeeping measures, training procedures, and best management practices (BMPs) to be employed by the City. The objective of the Manual is to reduce the potential for polluting or negatively impacting local receiving water from stormwater runoff. RATIONAL FOR SELECTION: An operation and maintenance program which includes a training component, and has the ultimate goal of preventing or reducing pollutant runoff from municipal facilities and field activities. Meets MS4 General Permit requirements. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017 1. Review and update PPGH Guidance Manual as necessary for: a. Facilities and activities that have the potential to release contaminants to the MS4. b. List of possible contaminants associated with each facility and activity. c. List local departments and positions responsible for pollution prevention with each facility and activity. 1st Permit Year 2018- 2021 1. Review and update PPGH Guidance Manual facility/activity inventory as necessary. 2. Review and update PPGH Guidance Manual map ensuring identification of location of facilities and activities. 3. Review and update PPGH Guidance Manual as necessary to: a. Develop PPGH standard operation procedures (SOPs) for inventoried facilities and activities categorized by similar operations. b. SOPs will include documented inspections and communication with relevant personnel of 2 facilities/activities per category prior to SOP category completion. 4. Complete SOPs as noted in the MS4 General Permit: a. One-fourth by end of second permit year b. One-half by end of third permit c. Three-fourths by end of fourth permit year d. All by end of fifth permit year 5. PPGH Training a. Develop and document training in conjunction with the development of the facility/activities SOPs b. Conduct annual training for all permittee staff directly involved with the implementation of the SOPs. c. Retain record of completed trainings and attendances. 2nd, 3rd, 4th, 5th Annual Report ---PAGE BREAK--- 23 STREET SWEEPING PROGRAM GH-2 DESCRIPTION: Kalispell streets are swept on a routine basis. During spring sweeping operations, streets are swept more often to collect winter sanding material. Routine sweeping practices include: • Operations of sweeper to get optimal debris removal • If storm drain plugging or high pollutant loading has been found in certain areas, schedule additional sweeping in those areas • Schedule sweeping immediately after street repair projects and water/sewer repair projects • Schedule sweeping immediately after special events like street fairs, art shows, and parades RATIONAL FOR SELECTION: Implementation of operational controls for reducing or eliminating the discharge of pollutants from streets, roads, highways, and municipal parking lots. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017- 2021 1. Implement the Street Sweeping Program 2. Track the quantity of street sweepings collected Annually LEAF COLLECTION PROGRAM GH-3 DESCRIPTION: Kalispell streets are swept and cleaned on a routine basis in the fall to collect leaves. In the fall season, leaves are collected from the street, curb, and gutter using sweepers, loaders, and vacuum trucks. Public Service Announcements are sent to inform Kalispell citizens of the correct leaf collection disposal method and routes. The leaves are collected and deposited at the city compost site. RATIONAL FOR SELECTION: Implementation of operational controls for reducing or eliminating the discharge of pollutants from streets, roads, highways, and municipal parking lots. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017- 2021 1. Implement the Leaf Collection Program 2. Track the quantity of leaves collected Annually ---PAGE BREAK--- 24 STORM DRAINAGE SYSTEM INSPECTION AND CLEANING PROGRAM GH-4 DESCRIPTION: Kalispell created and implemented a storm drainage system inspection and cleaning protocol in 2008 and ensures the following goals: • Clean 100 manholes and storm drain inlets each year. • Catch basins, storm drain inlets, and other conveyance structures in high pollutant load areas are identified and cleaned to remove sediments and debris accumulated during the summer. • During routine maintenance and inspections, note the condition of the sewer and identify areas that need repair or maintenance, look for evidence of illegal discharge or illicit connections, and report illicit discharge to supervisor. RATIONAL FOR SELECTION: The implementation of operation/maintenance controls reduce floatables, sediment, nutrients and other pollutant loadings from municipal systems to receiving waterbodies. YEAR IMPLEMENTATION ACTIVITY SCHEDULE 2017- 2021 1. Inspect and clean catch basins and manholes in areas outlined in the program annually. 2. Track the number of catch basins and manholes inspected and cleaned to ensure program conformance. Annually 5 Training Kalispell will create, conduct, and document training to meet the MS4 General Permit requirements as outlined in the following sections. All training presentations will be saved on the Public Works Server in a designated Stormwater Folder, and will be updated as needed to meet progress changes to the SWMP and BMPs as required by the MS4 General Permit. Training participation will be tracked, documented, and saved in each employee’s individual account in the City’s ADG Database. 5.1 Stormwater Management Team A Stormwater Management training will be created to provide comprehensive information regarding the MS4 General Permit, the SWMP and respective BMPs, timelines, goals, and define implementation responsibilities of each stormwater management member to ensure MS4 General Permit compliance. 5.1.1 Frequency The initial training will be conducted the 1st year of the permit (2017). New members of the stormwater management team will receive the equivalent amount of training within 90 days of their hire date. 5.2 Field Management-IDDE The Stormwater Field Management training will be created to provide education regarding stormwater impacts, the MS4 General Permit, the detection and elimination of illicit discharges, the implementation of the ERP, and address BMPs necessary to minimize discharges of pollutants during permittee activities or the operation of permittee facilities. ---PAGE BREAK--- 25 5.2.1 Frequency The training will be conducted at a minimum, during 1st (2017) and 4th (2020) years of the permit term for all appropriate permittee field staff (and pretreatment inspection staff) and staff who work at permittee facilities. Appropriate new field staff and staff who work at permittee facilities will receive the equivalent amount of training within 90 days of their hire date. 5.3 Construction Site Stormwater Management Construction Site Stormwater plan review and inspection training will be created for all inspectors and plan reviewers responsible for implementation of the Construction Site Stormwater Management Control Minimum Measure. Training topics will include plan review and inspection protocol, ordinance updates requirements, and the implementation of the ERP as outlined in the Construction Site Stormwater Management Control Minimum Measure. 5.3.1 Frequency The training will be conducted at a minimum, during the 1st (2017) and 4th (2020) years of the permit term for all inspectors and plan reviewers responsible for implementation of the Construction Site Stormwater Management Control Minimum Measure. New inspectors and plan reviewers will receive the equivalent amount of training within 90 days of their hire date. 5.4 Post-Construction Stormwater Management Post-Construction Stormwater Management training will be created and provided for all inspectors and plan reviewers responsible for implementation of the Post-Construction Stormwater Management in New Development and Redevelopment Minimum Measure. Training will include plan review and inspection protocol, ordinance update requirements, and the implementation of ERP as outlined in the Post-Construction Stormwater Management Minimum Measure. 5.4.1 Frequency The training will be conducted at a minimum, during the 1st (2017) and 4th (2020) years of the permit term for all inspectors and plan reviewers responsible for implementation of the Post-Construction Stormwater Management in New Development and Redevelopment Minimum Measure. New inspectors and plan reviewers will receive the equivalent amount of training within 90 days of their hire date. 5.5 Field Management-PPGH Stormwater Field Management training will be created to provide education for staff responsible for implementing Standard Operating Procedures (SOPs) developed as a requirement of the Pollution Prevention/Good Housekeeping Minimum Measure. Training will be oriented to staff involved with the specific duties addressed for each SOP. 5.5.1 Frequency The training will be conducted at the schedule outlined within Part II.6.a.v of the MS4 General Permit. Appropriate new field responsible for implementing SOPs will receive the equivalent amount of training within 90 days of their hire date. 6 Stormwater Management for Discharges to Impaired Waterbodies There are six named or perennial surface waters that receive stormwater discharges from outfalls within the City of Kalispell’s MS4 boundary. These receiving waters are as follows: ---PAGE BREAK--- 26 • Whitefish River • Stillwater River • Ashley Creek • Spring Creek • Bowser/Little Spring Creek- Aka Kids Creek-Classified as an unnamed perennial • Unnamed perennial surface water tributary to Ashley Creek from Foys Lake Appendix A provides the most up to date map of the city’s outfalls and associated waterbodies. Whitefish River, Stillwater River, Spring Creek, and Ashley Creek are classified as impaired surface waters of the state and each has an approved pollutant Total Maximum Daily Loads with waste load allocations (WLA). The following sections summarize the associated pollutant impairment for each listed impaired waterbody, the corresponding TMDL WLA, and the best management practices that target and reduce pollutants of concern from the MS4 discharge. The table below summarizes the impaired waterbody with within the Kalispell MS4 General Permit boundary and the associated pollutant(s) of impairment. Waterbody TMDL/ Impairment Pollutant for Kalispell’s MS4 Permit Total Phosphorus (TP) Total Nitrogen1 (TN) Dissolved Oxygen (DO) Sediment (Sed) Temperature (Temp) Whitefish River • Stillwater River • Spring Creek • • • Ashley Creek (Middle and Lower Segments) • • • • • 1. TN is a surrogate TMDL for Nitrate + Nitrite 2. More information on the TMDL’s related to Kalispell can be found in the Flathead-Stillwater Planning Area Nutrient, Sediment, and Temperature and Water Quality Improvement Plan 6.1 Nutrients-Total Phosphorus (TP) and Total Nitrogen (TN) DEQ performed a water quality assessment on listed waterbodies to determine pollutant impairments, and TMDL WLAs. In the adopted Flathead-Stillwater Planning Area Nutrient, Sediment, and Temperature and Water Quality Improvement Plan the City of Kalispell has been identified as a contributing source of pollutants for Nutrients specified as Total Phosphorus and Total Nitrogen to Middle Ashley Creek and Lower Ashley Creek segments, and Spring Creek. WLAs for each segment are provided in the following table. Nutrient TMDL WLA Middle Ashley Creek Lower Ashley Creek Spring Creek Total Phosphorus (TP) 15 lbs/growing season1 (44% reduction) 54 lbs/growing season (44% reduction) 13 lbs/growing season (44% reduction) Total Nitrogen 292 lbs/growing season (30% reduction) 1030 lbs/growing season (30% reduction 269 lbs/growing season (30% reduction) 1. Growing season is defined in TMDL from July 1st to September 30th ---PAGE BREAK--- 27 As represented in the MS4 General Permit, the Kalispell’s MS4 does not continuously discharge, and it only sporadically discharges during the dry summer growing season. Percent reduction allocations were developed, but the WLAs were not intended to add actual load limits to the MS4 General Permit. The TMDL WLAs are met by adhering to the General MS4 Permit requirements. 6.1.1 Nutrient Target BMPs to Reduce Pollutant Loads The table below outlines pollutants of concern, contributors, and the specifically identified measures and BMPs that will collectively control the discharges of the pollutants of concern. 6.2 Dissolved Oxygen In the adopted Flathead-Stillwater Planning Area Nutrient, Sediment, and Temperature and Water Quality Improvement Plan the City of Kalispell has been identified as a contributing source of pollutants for Dissolved Oxygen (DO) to Middle Ashley Creek and Lower Ashley Creek segments, and Spring Creek. TMDL WLAs for each segment are provided in the following table. Response BMPs for Nutrients Possible Contributors Minimum Measure* BMP Rational Residential Yard Maintenance 1 PE-1 Public Outreach Program Pollution Message, Education & Distribution to Target Audience PE-2 Public Outreach Website Pollution Message on Web 6 GH-3 Leaf Collection Greatly minimizes contribution of leaves to MS4 Pet Waste 1 PE-1 Public Outreach Program Pollution Message, Education & Distribution to Target Audience PE-2 Public Outreach Website Pollution Message on Web 2 PI-1 Public Involvement Program Awareness and participation at City Parks and designated Dog Parks 6 GH-1 PPGH Guidance Manual and Training Awareness and participation of City Parks Staff Land Development and Redevelopment 5 PC-1 Stormwater Quality Design Standards Stormwater Quality Controls to reduce nutrient contributions PC-2 Post Construction Stormwater Management Stormwater Quality Controls maintained to continue to reduce nutrient contributions PC-3 LID Concept Review LID Concept review, which has potential to reduce pollutant loads Public Education and Outreach on Stormwater Impacts, 2=Public Involvement/Participation, 3=Illicit Discharge Detection and Elimination, 4=Construction Site Stormwater Runoff Control, 5=Post-Construction Stormwater Management in New Development and Redevelopment, 6= Pollution Prevention/Good Housekeeping for Municipal Operations ---PAGE BREAK--- 28 Dissolved Oxygen TMDL WLA Middle Ashley Creek Lower Ashley Creek Spring Creek Dissolved Oxygen None Specified None Specified None Specified As represented in the MS4 General Permit, there are no WLA associated with this pollutant of concern. However, the City is still required to monitor and assess the potential for pollutant impact from the MS4’s discharge. 6.2.1 Dissolved Oxygen Target BMPs to Reduce Pollutant Loads The water quality improvements and target BMPs addressed in the Nutrient will result in improved DO concentrations. Therefore, the DO concentrations will improve by adhering to the permit requirements, discharge volumes and by utilizing the same Nutrient reducing BMPs listed above. 6.3 Sediment In the adopted Flathead-Stillwater Planning Area Nutrient, Sediment, and Temperature and Water Quality Improvement Plan the City of Kalispell has been identified as a contributing source of pollutants for Sediment to Middle Ashley Creek and Lower Ashley Creek segments, Spring Creek, and the Stillwater River. TMDL WLAs for each segment are provided in the following table. Sediment TMDL WLA Middle Ashley Creek Lower Ashley Creek Stillwater River Sediment 15.4 tons/year (62% reduction) 46.5 tons/year (62% reduction) 16.5 tons/year (62% reduction) As represented in the MS4 General Permit, percent reduction allocations were developed, but the WLAs are not intended to add load limits to the MS4 General Permit. The TMDL WLAs are met by adhering to the MS4 General Permit requirements. 6.3.1 Sediment Target BMPs to Reduce Pollutant Loads The table below outlines pollutants of concern, contributors, and the specifically identified measures and BMPs that will collectively control the discharges of the pollutants of concern. ---PAGE BREAK--- 29 Response BMPs for Sediment Possible Contributors Minimum Measure* BMP Rational Construction Activities 4 C-1 Land Disturbance Ordinance Ordinance establishes regulation/enforcement mechanism for construction site preventative controls C-2 Construction Site Stormwater Management Program for training, plan review, permit, inspections, and tracking to ensure pollution prevention during construction 1 PE-1 Public Outreach Program Pollution Message, Education, Training & Distribution to Target Audience PE-2 Public Outreach Website Pollution Message, Permit Access on Web 2 PI-1 Public Involvement Program Education and Participation from Public to solicit input and notify city of pollution PI-2 Public Involvement Website Participation from Public and Stakeholders to solicit input and notify city of pollution 6 GH-1 PPGH Guidance Manual and Training Awareness, SOPs, and participation of City Staff for city projects to reduce pollutants Municipal Facilities and Activities 6 GH-2 PPGH Guidance Manual and Training Awareness, SOPs, and participation of City Staff for city activities and facility operation to reduce pollutants GH-2 Street Sweeping Program Program greatly minimizes contribution of sediment to MS4 GH-3 Leaf Collection Program Program greatly minimizes contribution of pollutants to MS4 GH-4 Strom Drainage System Inspection and Cleaning Program Program greatly minimizes contribution of pollutants to MS4 Land Development and Redevelopment 5 PC-1 Stormwater Quality Design Standards Stormwater Quality Controls to reduce pollutant contributions PC-2 Post Construction Stormwater Management Stormwater Program for Water Quality Controls to track and maintained in order to continue reduction of pollutant contributions PC-3 LID Concept Review LID Concept review which have potential reduce pollutant loads Public Education and Outreach on Stormwater Impacts, 2=Public Involvement/Participation, 3=Illicit Discharge Detection and Elimination, 4=Construction Site Stormwater Runoff Control, 5=Post-Construction Stormwater Management in New Development and Redevelopment, 6= Pollution Prevention/Good Housekeeping for Municipal Operations ---PAGE BREAK--- 30 6.4 Temperature In the adopted Flathead-Stillwater Planning Area Nutrient, Sediment, and Temperature and Water Quality Improvement Plan the City of Kalispell has been identified as a contributing source of pollutants for Temperature to Middle Ashley Creek and Lower Ashley Creek segments, and the Whitefish River. TMDL WLAs for each segment are provided in the following table. Temperature TMDL WLA Middle Ashley Creek Lower Ashley Creek Whitefish River Temperature None Specified None Specified None Specified As represented in the MS4 General Permit, there are no WLA associated with this pollutant of concern. However, the City is still required to monitor and assess the potential for pollutant impact from the MS4’s discharge. 6.4.1 Temperature Target BMPs to Reduce Pollutant Loads As stated in the MS4 General Permit, the discharge temperatures will be consistent with naturally occurring conditions by the City of Kalispell MS4 adhering to the permit requirements. Therefore, the City will meet the TMDL and MS4 General Permit through the implementation, monitoring, and evaluation outlined in the SWMP. 7 TMDL Action Plan In order to meet the TMDL requirements of the MS4 General Permit, Kalispell will include as a part of the SWMP a section titled “TMDL Action Plan”. The plan will identify how Kalispell will progress toward meeting the TMDL by: • Identify the measures and BMPs it plans to implement • Describing the MS4’s impairment priorities and long term strategy • Outlining interim milestones a completion schedule for action items) for controlling the discharge of the pollutants of concern • Evaluation of the progress towards meeting the TMDL. Additionally, TMDL related monitoring will be performed to evaluate the effect of the BMPs selected for reducing MS4 loading (option 2) to the impaired waterbodies. A sampling plan including strategy rationale, monitoring frequency, parameters and locations is required to be developed and submitted with the 1st Annual Report (2017). Upon MDEQ approve of the sampling plan, the city must provide a mechanism for the Public to review and submit comments. The TMDL sample plan will begin no later than March 1st of the 2nd permit year. The TMDL Action Plan will be submitted with the 4th year Annual Report for MDEQ approval. Upon approval, the permittee will begin to implement the approved section no later than the start of the 5th permit year. The Action Plan will be evaluated annually based on monitoring results, revised as needed, and resubmitted with Annual Reports beginning with the 5th year Annual Report. Rationale will be provided for any revisions to the Action Plan and revisions are required to be approved by the MDEQ. ---PAGE BREAK--- 31 8 Self-Monitoring The City is required to collect stormwater samples semiannually at four locations for the following parameters: • Sediment (Total Suspended Solids) • Nutrients (Total Nitrogen, Total Phosphorus) • Metals (Copper, Lead, Zinc) • Oils & Grease • pH • Organics (Chemical Oxygen Demand) • Water Temperature Kalispell selected Option 2, as outline in the MS4 General Permit, for monitoring locations. One location represents stormwater runoff from a predominantly residential area, the second location represents stormwater runoff from a predominantly commercial/industrial area, the third location represents stormwater runoff from a large drainage area combining both commercial and residential areas, and the fourth location is in Ashley Creek outside of the MS4 boundary. The following table provides location, land use correlation, and naming scheme. Monitoring results will be used by the City to self-evaluate measures taken to improve the quality of stormwater discharges. Each annual report will include an evaluation of the monitoring results relative to the long-term median. The evaluation will include comparisons between monitoring locations, discuss determinations for trends and outliers in monitoring results compared to the calculated long- term median or results outside a pH range of 6.0 to 9.0 standard units, and a schedule and rationale for BMPs planned to improve water quality of stormwater discharges based on monitoring results. 9 SWMP Management Team, Responsibilities, and Communications The City is responsible to implement a coordinated stormwater program inclusive of the development of a stormwater management team comprised of persons responsible for implementation of the SWMP and the establishment of formal mechanisms for communication and coordination between team Self-Monitoring Option 2-Monitoring Summary Permit Identification Residential/ Commercial Drainage Area (Acre) Lat/Long Kalispell ID Waterbody DEQ Location SWR-4 Residential 30% Commercial 70% 266 Lat: 48°11’40” N Long: 114°17’56” W Sylvan Drive Stillwater River 001 SWR-7 Commercial /Industrial 100 Lat: 48°12’27” N Long: 114°18’49” W Wyoming ST Stillwater River 002 AC-A In-stream Outside MS4 Boundary NA Lat: 48°11’36” N Long: 114°20’41” W In-stream at Bridge North of Willow Creek Subdivision Ashley Creek 003 AC-11 Residential 294 Lat: 48°11’10” N Long: 114°19’18” W 11 St West Ashley Creek 004 ---PAGE BREAK--- 32 members (e.g. meetings, email updates, etc.) to ensure cooperation necessary to facilitate permit compliance and timely reporting. 9.1 SWMP Management Team The City of Kalispell is governed by the Mayor and Council and is managed by a City Manager. The City Manager is the principal executive officer and therefore is the certified official to sign documents for the MS4 General Permit. The Public Works Department is responsible to develop, implement, adhere, and enforce all aspects of the MS4 General Permit. The primary SWMP Coordinator will be the responsibility of the personnel performing the Engineer II position within the Public Works Department. The following is an organizational chart identifying City staff and MS4 General Permit responsibilities. ---PAGE BREAK--- 33 ---PAGE BREAK--- 34 9.2 SWMP Management Team Communication Permittees must establish, document, and execute formalized mechanisms for regular communication between stormwater management team members to allow for exchange of information and submittal of information necessary for permit compliance tracking and reporting. The SWMP Coordinator will be responsible for the management and compliance of the Kalispell’s MS4 General Permit. Communication mechanisms will be performed using email, phone, webpage, and a data storage server, database through the following avenues: • Direct communication between team members o Email o Phone o Text • Informational communications between team members o Shared access to stormwater data storage on a shared network server. o Organize sever to manage the SWMP for all members. o Stores all information for SWMP including training presentation, programs, BMPs, required contact information, monitoring, evaluation, and annual reports. • Training participation will be tracked, documented, and saved in each employee’s individual account in the City’s ADG Database. ---PAGE BREAK--- 35 Appendix A-Drainage Basin and Outfall Summary Within Kalispell City limits there are seventy two drainage basins. The drainage basins within the City limits outfall to several different systems including perennial surface waters, infiltration trenches, sloughs, and natural depressions. Within those seventy two drainage basins the City and Montana Department of Transportation (MDT) operate and maintain multiple separate storm sewer systems. There are six named or perennial surface waters that receive stormwater discharges from the City of Kalispell’s MS4. These receiving waters are as follows: • Whitefish River • Stillwater River • Ashley Creek • Spring Creek • Little Spring Creek-aka Kids Creek or Unnamed perennial surface water tributary to Spring Creek • Unnamed perennial surface water tributary to Ashley Creek from Foys Lake The Whitefish River, Stillwater River, Spring Creek, and Ashley Creek are classified as impaired surface waters of the state, and accumulatively have fifty five delineated outfalls. The table below and Outfall Map summarize the inventoried outfalls, discharge locations, associated waterbody, and City/MDT responsibility. ---PAGE BREAK--- Outfall Summary No. Location Waterbody Impaired Waterbody Pollutant of Concern1 Sub basin City MDT Sub basin (Acres) 1 E Treatment Road Ashley Creek YES TP,TN,Sed,DO,Temp AC1 X X 28.79 2 Teal Dr Ashley Creek YES TP,TN,Sed,DO,Temp AC2 X 49.16 3 Rudy Duck Ditch Ashley Creek YES TP,TN,Sed,DO,Temp AC3 X 36.87 4 Begg Park Dr Ashley Creek YES TP,TN,Sed,DO,Temp AC4 X 32.02 5 N Belmar Dr Ashley Creek YES TP,TN,Sed,DO,Temp AC5 X 8.16 6 17 St W Ashley Creek YES TP,TN,Sed,DO,Temp AC6 X X 546.05 7 Sunny Side Dr Ashley Creek YES TP,TN,Sed,DO,Temp AC7 X 35.89 8 St (cul de sac east off Denver) Ashley Creek YES TP,TN,Sed,DO,Temp AC8 X 3.05 9 Denver St (south) Ashley Creek YES TP,TN,Sed,DO,Temp AC9 X 17.88 10 Denver St (north) Ashley Creek YES TP,TN,Sed,DO,Temp AC10 X 2.74 11 11 St W Ashley Creek YES TP,TN,Sed,DO,Temp AC11 X 293.84 12 Old School Station Outfall 1 Ashley Creek YES TP,TN,Sed,DO,Temp AC13 X 40.30 13 Kalispell Bypass South Ashley Creek YES TP,TN,Sed,DO,Temp AC14 X 0.82 14 Kalispell Bypass South Ashley Creek YES TP,TN,Sed,DO,Temp AC15 X 33.7 15 Kalispell Bypass North Little Spring Creek NO NA LSC1 X X 43.90 16 Kalispell Bypass South Little Spring Creek NO NA LSC2 X X 69.0 17 Spring Creek Retention Basin Outlet Spring Creek YES TP,TN,Sed,DO SC1 X X 701.64 18 McDonalds and Carlot Drainage-Hwy 2 Spring Creek YES TP,TN,Sed,DO SC2 X X 4.27 19 Appleway Apartments - Appleway Dr Spring Creek YES TP,TN,Sed,DO SC3 X 3.44 20 Hwy 2 West So of Hampton Inn Spring Creek YES TP,TN,Sed,DO SC4 X X 4.18 21 Appleway Apartments - Appleway Dr Spring Creek YES TP,TN,Sed,DO SC5 X 3.15 ---PAGE BREAK--- 1 Outfall Summary No. Location Waterbody Impaired Waterbody Pollutant of Concern1 Sub basin City MDT Sub basin (Acres) 22 Hwy 2 West from Glenwood Dr and Gateway West Mall Detention Outfall Spring Creek YES TP,TN,Sed,DO SC6 X X 34.64 23 Cooper Lane Spring Creek YES TP,TN,Sed,DO SC7 X 6.45 24 Diamond Ridge Outfall 1 Spring Creek YES TP,TN,Sed,DO SC8 X 7.16 25 Aspen Creek Detention Outfall 1 Spring Creek YES TP,TN,Sed,DO SC9 X 6.32 26 Aspen Creek Detention Outfall 2 Spring Creek YES TP,TN,Sed,DO SC10 X 4.75 27 Aspen Creek Detention Outfall 3 Spring Creek YES TP,TN,Sed,DO SC11 X 9.13 28 Aspen Creek Detention Outfall 4 Spring Creek YES TP,TN,Sed,DO SC12 X 3.63 29 Diamond Ridge Outfall 2 Spring Creek YES TP,TN,Sed,DO SC13 X 6.65 30 Spring Creek Estates Under Ground Detention Facility Outfall Spring Creek YES TP,TN,Sed,DO SC14 X 51.11 31 Mountain Vista Detention Outfall Spring Creek YES TP,TN,Sed,DO SC15 X 44.40 32 Three Mile Drive, Stillwater Road, Norhland Subdivision, Cottonwood Estates, Blue Heron Estates Spring Creek YES TP,TN,Sed,DO SC16 X 103.42 33 Cascade Business Park-Finacial Drive Spring Creek YES TP,TN,Sed,DO SC17 X 11.14 34 Hampton Inn Spring Creek YES TP,TN,Sed,DO SC18 X 3.22 35 Mountain Vista Phase 4 Spring Creek YES TP,TN,Sed,DO SC19 X 7.64 36 Spring Creek Apartments Spring Creek YES TP,TN,Sed,DO SC20 X 8.64 37 Glacier Village Greens-E Nicklaus Ave Outfall 1 Whitefish River YES Temp WFR1 X 8.68 38 Buttercup Loop-Willows Subdivision Stillwater River YES Sed SWR1 X 59.70 39 Leisure Dr-Leisure Heights Stillwater River YES Sed SWR2 X 8.49 40 Willow Glen-N of Woodland Dr Stillwater River YES Sed SWR3 X X 1.38 ---PAGE BREAK--- 2 Outfall Summary No. Location Waterbody Impaired Waterbody Pollutant of Concern1 Sub basin City MDT Sub basin (Acres) 41 Sylvan Dr-Detention Outfall Stillwater River YES Sed SWR4 X X 265.67 42 Woodland Park Dr Stillwater River YES Sed SWR5 X 63.08 43 Hwy 2 E at City limits Stillwater River YES Sed SWR6 X X 7.38 44 E Wyoming St Stillwater River YES Sed SWR7 X X 100.00 45 1st Ave EN Stillwater River YES Sed SWR8 X 8.03 46 Lawrence Park Rd Stillwater River YES Sed SWR9 X 0.31 47 River View Drive Stillwater River YES Sed SWR10 X 25.67 48 Juniper Bend Drive Stillwater River YES Sed SWR11 X 6.18 49 Stillwater Bluff Detention Outfall Stillwater River YES Sed SWR14 X 6.03 50 Eisinger Carlot Stillwater River YES Sed SWR15 X X 393.95 51 Silverbook Estates Outlet1 Stillwater River YES Sed SWR16 X X 91.56 52 Silverbook Estates Outlet2 Stillwater River YES Sed SWR17 X X 71.18 53 Silverbrook, Hwy 93, Church Dr Stillwater River YES Sed SWR19 X X 21.45 54 Buffalo Hill Golf Course Outlet1 Stillwater River YES Sed SWR20 X 4.00 55 Buffalo Hill Golf Course Outlet2 Stillwater River YES Sed SWR21 X 9.23 56 Kalispell Bypass Outfall 1 (River Church) Stillwater River YES Sed SWR22 x x 18.39 57 Greendale Ct Dry Bridge Slough No NA DBS1 X 2.56 58 Rogers Drive Dry Bridge Slough No NA DBS2 X 4.03 59 14 St E Dry Bridge Slough No NA DBS3 X 77.43 60 Kelly Road Outlet 1 Muscrat Slough No NA MS1 X 2.84 61 Condor Drive Muscrat Slough No NA MS2 X 6.78 62 Russel Drive Muscrat Slough No NA MS3 X 2.17 63 Muskrat Slough Outfall Muscrat Slough No NA MS4 X 2.33 64 Kelly Road Outlet 2 Muscrat Slough No NA MS5 X X 82.36 65 Muskrat Slough Outfall Muscrat Slough No NA MS6 X 1.07 ---PAGE BREAK--- 3 Outfall Summary No. Location Waterbody Impaired Waterbody Pollutant of Concern1 Sub basin City MDT Sub basin (Acres) 66 Lonepine Meadow Detention Outfall Unnamed Tributary No NA UT1 X 22.05 67 FVCC and Hutton Ranch - Natural Depression No discharge to waterbody No NA CB1 X X 107.53 68 Glacier Village Greens-E Nicklaus Ave Infiltraiton Trench No discharge to waterbody No NA CB2 X 11.80 69 Glacier Village Greens-E Nicklaus Ave Infiltraiton Trench No discharge to waterbody No NA CB3 X 5.54 70 Captain's Marine-Natual Depression No discharge to waterbody No NA CB4 X 9.62 71 Old School Station- Natural Depression No discharge to waterbody No NA CB5 X 28.79 72 Grandview Drive- Natural Depression No discharge to waterbody No NA CB6 X 154.63 Notes: 1) TP=Total Phosphorus, TN =Total Nitrogen, DO=dissolved Oxygen, Sed=Sediment, Temp=Temperature ---PAGE BREAK--- 4 ---PAGE BREAK--- 5 ---PAGE BREAK--- 6 ---PAGE BREAK--- 7