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Home My WebLink About054 OI&M Plan for StormwaterSS62 This report and drainage plan for the Sundance Springs commercial lot 2 was prepared by me (or under my direct supervision) in accordance with the provisions of the City of Bozeman “Design Standards and Specifications Policy”. Signature: State of Montana No. 20459 07-30-25 OPERATION, INSPECTION, AND MAINTENANCE PLAN Sundance Springs Comm Lot 2 Project Number 25020 Synergy Engineering and Konsulting 3731 Equestrian Lane, STE 102, Bozeman, MT 59718/ 406-624-6137 marlene@seakmt.com Sundance Springs COMM LOT 2 REVISED July 30, 2025 1 Table of Contents Responsible Party .......................................................................................................................................... 1 1. ENTITY RESPONSIBLE ....................................................................................................................... 1 2. SUCCESSION ..................................................................................................................................... 1 3. ENGINEER OF RECORD ..................................................................................................................... 1 4. SITE PLAN ......................................................................................................................................... 2 5. Maintenance Schedule .................................................................................................................... 3 6. DESIGN LIFE ...................................................................................................................................... 4 7. ANNUAL OPERATION AND MAINTENANCE COSTS .......................................................................... 4 8. FINANCIAL PLAN AND FUNDING MECHANISM ................................................................................ 4 Attachments .............................................................................................................................................. 4 A. Maintenance Report .................................................................................................................... 4 Responsible Party 1. ENTITY RESPONSIBLE 406 Coal Blowers Mailing Address: P.O. Box 370, Bozeman MT, 59771 Phone: 406-580-5624 Email: michael@westernmountaininvestments.com 2. SUCCESSION Operation and maintenance responsibilities will be recorded with the Gallatin County Clerk and Recorder’s Office through a maintenance agreement or as part of property covenants. The agreement will ensure all obligations transfer to subsequent owners or responsible parties. 3. ENGINEER OF RECORD Synergy Engineering and Konsulting Mailing Address: 3731 Equestrian Ln, STE 102, Bozeman MT 59718 Phone: 406-624-6137 Email: Marlene@Seakmt.com Sundance Springs COMM LOT 2 REVISED July 30, 2025 2 4. SITE PLAN Sundance Springs COMM LOT 2 REVISED July 30, 2025 3 5. Maintenance Schedule Component Task Description Frequency Detention Ponds Inspect for erosion, vegetation, damage, clogging of outlets Every 14 days & post 0.5" storm Detention Ponds Remove when sediment volume exceeds 10% of pond volume As needed Micro Pools Remove sediment once it reaches ½ design depth Semi-annually or as needed Outlet Structures Inspect for debris, orifice clogging, structural issues Every 14 days & post 0.5" storm Basin Side Slopes Inspect for erosion, vegetation condition Monthly during growing season PICP Areas Inspect joints, vegetation in gaps, sediment accumulation Annually Sundance Springs COMM LOT 2 REVISED July 30, 2025 4 6. DESIGN LIFE Component Expected Design Life Recommended Replacement or Major Rehab Schedule Detention Basin Excavation 50+ years Regrade as needed; clean sediment every 10–20 yrs Outlet Structure Components 30 years Replace screens/orifices every 20–30 years Micro Pools (concrete) 30–40 years Repair/replace liner every 20–30 years PICP Surface 20–25 years Replace or rebuild bedding layer at 25 years 7. ANNUAL OPERATION AND MAINTENANCE COSTS Task/Item Frequency Unit Cost Annual Cost Routine Inspections 26/year $200 $5,200 Post-Storm Event Inspections Est. 10/year $200 $2,000 Sediment Removal (Micro Pools) 2/year $500 $1,000 Regrading/Vegetation Maintenance 1/year $1,500 $1,500 Orifice/Outlet Maintenance 1/year $750 $750 Contingency — — $1,000 Total Estimated Annual O&M Cost $11,450 8. FINANCIAL PLAN AND FUNDING MECHANISM The owner shall establish a sinking fund dedicated to stormwater system O&M. The fund will be held in a separate account by Western Mountain Investments or its successors and will be adjusted annually based on inflation (estimated 3% per year). Attachments A. Maintenance Report Chapter 6 - Storm Drainage Design 6-44 City of Bozeman Design and Construction Standards Stormwater Facility Inspection Form Section 1: General Information Facility ID: Facility Type: Choose an item. Date/Time: Click or tap to enter a date. Owner: Contact: Inspector’s Name, contact info: Choose an item. Location/Access info: Type of Inspection: Routine, Dry Weather Routine, Wet Weather Complaint Driven Other: __________________ Section 2: Weather and Discharge Information Most recent precipitation or melt: Temperature: Is a stormwater discharge occurring? Yes No If yes, what is the source and quality of discharge? Is an illegal discharge occurring? Yes No If yes, what is the source and quality of discharge? Section 3: Facility Maintenance Priority Low: Stormwater facility appears to be functioning as designed. Continue scheduled maintenance. Medium: Stormwater facility requires minor to moderate sediment and vegetation maintenance to mitigate the risk of flooding, waterway pollution, and infrastructure failure. High: Stormwater facility requires significant sediment dredging, vegetation removal, and/or infrastructure repairs to restore function. Notes, Findings & Recommendations: Inspector’s Signature: ________________________________ Date: ___________________ Chapter 6 - Storm Drainage Design 6-45 City of Bozeman Design and Construction Standards Section 4: Qualitative Analysis Components #Items Conditions Results Notes and Required Actions General Degraded, missing, or inadequate Yes 1.1 Accessibility maintenance access? No Trash, sediment, and waste within 1.2 Debris Yes and around the facility? No Overgrown or dead cattails, Yes 1.3 Vegetation woody shrubs, weeds, grass, and trees? No Infrastructure Damaged inlet pipe, outlet pipe, Yes1.4 Condition outfall structure, or fencing? No Facility Condition Pretreatment Bay Clogged, obstructed, or filled 2.1 Yes or Facility pretreatment forebay or facility? No 2.2 Storage Bay Clogged or filled storage bay? Yes No Stagnant water with infiltration Groundwater or Yes 2.3 greater than 48 hours post-rain Standing Water event? No 2.4 Flow Path Clogged or obstructed flow path? Yes No Barren or exposed surfaces on Yes 2.5 Side Slopes Facility’s side slopes and bottom? No Maintenance Maintenance Plan Is there a written plan specific to Yes 3.1 or Agreement this facility? No Yes 3.2 Implementation Is there evidence of maintenance? No Chapter 6 - Storm Drainage Design 6-46 City of Bozeman Design and Construction Standards Section 5: Quantitative Analysis Vegetation Cover type % Within facility Notes Bare ground Aquatics Grasses/Herbaceou Trees >3” DBH Shrubs Total 100 Elevation Analysis Location Reading (ft)Elevation (ft)Notes SRV#CP Control Point SRV#1 Inlet SRV#2 Outlet SRV#3 Center SRV#4 North of Center SRV#5 East of Center SRV#6 South of Center SRV#7 West of center SRV#8 Berm or overflow SRV#9 Summary Chapter 6 - Storm Drainage Design 6-47 City of Bozeman Design and Construction Standards Section 6: Facility Maintenance Inspection Exhibit Chapter 6 - Storm Drainage Design 6-48 City of Bozeman Design and Construction Standards Photo 1 description Photo 2 description Section 7: Photo Log