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Home My WebLink AboutNWXStormO+MManual Storm Water Management System Operation & Maintenance Manual NWX Apartments – an ICON community Lots 1, 4, 14, & 15, Northwest Crossing Subdivision Bozeman, Montana Prepared For: NWX, LLC PO Box 11890 Bozeman, Mt. 59719 Prepared By: 2880 Technology Blvd. W. • PO Box 1113 • Bozeman, MT 59771 (406) 587-0721 • www.m-m.net Icon Apartments at Northwest Crossing Storm Water Operation & Maintenance Manual 1 Site Data Location: NWX Apartments – an ICON community Northwest Crossing Subdivision Bozeman, MT 59715 Responsible Party for Maintenance: The owner shall designate a qualified professional entity or individual to perform all monitoring. The name, address and telephone number of the entity or individual shall be provided to the City of Bozeman Public Works Department. The owner's representative shall be required to keep a log of all required inspections and maintenance required. The log shall be made available to the City of Bozeman Public Works Department for review as requested. Land Use & Site Area: The developer has planned to construct an 18-building multi-family residential complex and associated site improvements on Lots 1, 4, 14, & 15 of the Northwest Crossing Subdivision (zoned REMU - Residential emphasis mixed-use zoning district and B-2M - Community business district-mixed). Generally, the project is bordered by Harvest Parkway to the north, West Oak Street to the south, Rosa Way to the west, and Twin Lakes Avenue to the east. Storm Water Management Systems: The storm water management system for the development will consist of a series of storm drainage inlets, piping, and subsurface storm water detention systems. Descriptions of additional development storm water provisions are provided in the following sections. Inspection & Maintenance Storm water facilities and permanent Best Management Practices (BMPs) must be inspected in accordance with this document. All documentation on scheduled inspections, times of inspections, maintenance completed, remedial actions taken to make repairs, and any modifications or reconstruction of the storm system shall be maintained on-site. Disposal of the accumulated sediment must be in accordance with all applicable local, state, and federal guidelines and regulations. If any drainage structure or outfall indicates the presence of petroleum, the Icon Apartments at Northwest Crossing Storm Water Operation & Maintenance Manual 2 petroleum material shall be removed and disposed of immediately in accordance with applicable regulations. Pavement Sweeping & Vacuuming: All paved areas shall be swept twice a year, scheduled in spring and fall. Inlets & Catch Basins All inlets and catch basins shall be inspected to ensure they have adequate sump capacity, hoods are in place, frames and grates are not damaged, and internal concrete and grout is intact.  Inspect catch basins four times per year and following large storm events.  Clean sump annually or whenever basin sump becomes filled with sediment to half its depth (1’-0”). If inspection indicates the presence of petroleum, the petroleum material shall be removed and disposed of immediately in accordance with applicable regulations. Storm Drain Manholes & Overflow Control Structures All storm drain manholes and overflow control structures shall be inspected to ensure manhole frames and covers are not damaged, inlet and outlet pipes are draining freely, and internal manhole concrete and grout is intact.  Inspect structures annually and following large storm events.  Clean structures as field determined. If inspection indicates the presence of petroleum, the petroleum material shall be removed and disposed of immediately in accordance with applicable regulations. Piping All storm drain piping shall be inspected for any damage and/or blockages.  Inspect piping annually and following large storm events.  Length of pipes should be cleaned and flushed as field determined. Sub-Surface Detention System: Maintenance of the sub-surface detention basin is also essential. General objectives of maintenance are to prevent clogging and sediment buildup. The underground chambers shall be flushed based on manufacture recommendations and as necessary. Yearly monitoring of the inspecting ports shall occur.  Inspect sub-surface annually and following large storm events. Icon Apartments at Northwest Crossing Storm Water Operation & Maintenance Manual 3  Remove accumulated sediment/trash per manufacture recommendations. If inspection indicates the presence of petroleum, the petroleum material shall be removed and disposed of immediately in accordance with applicable regulations. Permeable Surfaces: Permeable surfaces shall be inspected and maintained to ensure proper operation as follows:  Inspect paver/permeable surfaces for cracking, deterioration, settling, or misalignment. Repair as needed.  Inspect underdrains and overflow structures to ensure free from sediment, debris, and/or dead vegetation. Flush the underdrain system to check for clogging on a yearly basis.  Vacuum sweep the surface with equipment such as a regenerative air vacuum sweeper. Adjust the vacuum settings to remove visible sediment without uptake of aggregate from paver openings. Additional aggregate may be needed between pavers after vacuuming If inspection indicates the presence of petroleum, the petroleum material shall be removed and disposed of immediately in accordance with applicable regulations. Housekeeping Operations Good housekeeping and material management reduces the risk of spills or other accidental exposure of materials and substances to storm water runoff.  All materials stored on-site must be stored in a neat, orderly manner in their appropriate containers and, if possible, under a roof or other enclosure.  Products shall be kept in their original containers with the original manufacturer’s label.  Substances should not be mixed with one another unless recommended by the manufacturer.  Whenever possible, all of a product will be used up before disposing of a container.  Original materials labels and material safety data sheets (MSDS) shall be kept by the Owner.  Petroleum products:  All on-site vehicles and parking areas shall be monitored weekly for leaks and spills. Spills shall be cleaned immediately.  Petroleum products shall be stored under cover and shall be in tightly sealed containers that are clearly labeled.  Fertilizers:  Fertilizers shall only be used in the minimum amounts as recommended by the manufacturer.  The contents of any unused fertilizer shall be transferred to a clearly labeled, sealable plastic bin to avoid spillage.  Paints/solvents:  All paints and solvents shall be stored in original manufacturer’s containers in a covered location. Icon Apartments at Northwest Crossing Storm Water Operation & Maintenance Manual 4  The use of paints and solvents shall, whenever possible, be limited to service or storage bays. Where not possible, the work area shall be protected with impermeable drop clothes or tarps. At no point shall material be used in parking or access ways that are tributaries to the drainage system. Spill Control Practices  Manufacturer's recommended methods shall be clearly posted for spill clean-up and hotel personnel shall be made aware of the procedures and the locations of cleanup information and supplies.  Material and equipment necessary for spill clean-up will be kept on-site in a designated material storage area. Equipment will include, but not be limited to, brooms, dust pans, mops, rags, gloves, goggles, absorbent materials, sand, sawdust, and plastic & metal trash containers specifically kept and labeled for this purpose.  All spills must be cleaned-up immediately after discovery.  Spills of toxic or hazardous material must be reported to the appropriate state, local, or federal agency, as required by-law. Winter Maintenance Activities  Snow plowing operations shall stockpile snow, ice and accumulated materials in areas where snow melt will flow into the on-site drainage systems, including drainage basins.  During winter conditions sand use site-wide shall be applied to the minimum extent possible to maintain safe conditions and limit accumulations within the permeable concrete paver blocks.  The usage of sodium chloride or chloride containing materials for snow and ice removal is not recommended so as to avoid the introduction of salts to the storm water management system. Repair Procedures  Permeable Pavers  Replace broken, chipped, or cracked pavers as needed.  Structural Components (inlets, diversion structures, outlet structures, etc.)  Replace structures as needed to ensure proper drainage is achieved.  Grass Swales, Dense Weeds or Sparse Grass Cover  Re-seed or sod the area, but first determine and address the source of the problem. Expand irrigation coverage, add soil amendments, fertilize, etc., as needed to improve growth media and grass health.  Grass Swales, Areas of Ponding  Cut sod and re-grade the area for consistent downgradient slope along the swale. Then re-seed or sod the area of disturbance. Emergency Contacts PLEASE CALL 9-1-1 FOR ALL POTENTIAL EMERGENCIES City of Bozeman Fire Department: (406) 582-2350 City of Bozeman Police Department: (406) 582-2000