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SPR SUBMITTAL
5th & Main | BOZEMAN, MT, 59715
009
STORMWATER MAINTENANCE PLAN
JOB NO. B22-007
MONTANA | WASHINGTON | IDAHO | NORTH DAKOTA | PENNSYLVANIA
SEPTEMBER 2022
406.586.0277
tdhengineering.com
234 East Babcock Street
Suite 3
Bozeman, MT 59715
CLIENT ENGINEER
SMA Architecture & Design
428 E Mendenhall Street
Bozeman, MT 59715
TD&H Engineering
234 East Babcock Street, Suite 3
Bozeman, MT 59715
Engineer: Cody Croskey, PE
ON-SITE STORM WATER MAINTENANCE PLAN
5th & MAIN RESIDENCES
BOZEMAN, MONTANA
5th & MAIN RESIDENCES Storm Water Maintenance Plan B22-007 1
5th & MAIN RESIDENCES
STORM WATER MAINTENANCE PLAN
PURPOSE AND INTRODUCTION
This maintenance plan identifies the recommended maintenance procedures necessary for the
proper function of the on-site storm water management system proposed at the 5th & Main
Residences project in Bozeman, Montana. For the purpose of this plan, the site is 100%
covered by a building with an internal parking garage, and the on-site storm water management
system includes roof drains with in-line filters and parking garage floor drains with a sand/oil
separator.
The maintenance responsibility for the on-site stormwater management system belongs to the
landowner. The landowner may delegate routine inspection and maintenance responsibilities to
the on-site facility operations management team or may hire a qualified professional entity or
individual to perform certain monitoring and maintenance tasks as necessary. A log shall be
kept for all required inspections and maintenance. These logs shall be made available to the
City of Bozeman Public Works Department for review as requested. A sample maintenance log
is included in the attached Appendix.
STORM WATER MANAGEMENT SYSTEM
The on-site storm water management system includes roof drains, roof drain filters, parking
garage floor drains, sand/oil separator, and floor drain sewer ejector pump. These various
components of storm water management infrastructure are designed to collect, convey, clean,
and discharge storm water runoff that is generated on the property before it leaves the site or
enters local waterways.
Storm water systems require proper maintenance to prevent sediment clogging, obstruction of
inlets, pipes, and structures, and to maintain the effectiveness of the filters and sand/oil traps.
Such issues may result in downstream pollution, unpleasant odors, or water damage, and must
be mitigated. Scheduled inspections, times of inspections, locations inspected, maintenance
completed, corrective actions taken, and any modifications or reconstruction performed shall be
documented in the maintenance logs to be readily available upon request. Disposal of
accumulated sediment must be in accordance with all applicable local, state and federal
regulations.
STORM WATER MAINTENANCE PROCEDURES
The following maintenance procedures are intended to prolong the life of installed system
components and ensure their continued functionality:
General Storm Water System Maintenance –
1. Rooftop landscaping/drains and parking garage surfaces/drains should be cleared of
leaves and other debris once after primary leaf drop in the fall and once after snow melt
in early spring at a minimum. This will minimize the potential for debris to enter the
system which could lead to premature clogging of structures, reduced storage capacity,
and/or blockage of inlets.
5th & MAIN RESIDENCES Storm Water Maintenance Plan B22-007 2
2. Inspect the roof and floor drain inlets, overflow structures, and cleanouts, for sediment
build-up or clogging and flush/clear as needed. Inspect for snow/ice buildup at least
once weekly during winter months and clear the inlet as needed. Do not pile snow over
inlets.
3. Snow storage for rooftop amenity areas should be performed in designated areas during
winter months and should not be allowed to be piled in front of or over roof drain inlets.
Piled snow around or over the inlets could block early snowmelt run-off from entering the
system, possibly causing overflows and icy conditions.
4. Sanding of the parking garage entries and drive aisles should be done sparingly or
avoided completely. Sand or other sediment tracked into the parking garage structure
will likely be washed into the floor drain system components which can lead to buildup
and reduced capacity or blockages over time.
Roof Drain Filter Maintenance – BioClean Model BC-DF8:
1. Upon Installation and after each filter Replacement:
a. After installation and reassembly, the contractor or plumber and maintenance
personnel shall demonstrate that the filter assembly has been properly installed
at the correct location(s), elevations, and with appropriate seals and gaskets to
be free of leaks.
2. 6-month Maintenance Activities:
a. Disassemble and inspect/clean the internal screen and components a minimum
of twice a year
3. Annual Maintenance Activities:
a. Replace the Hydrocarbon Filter Boom once per year.
Sand/Oil Separator Maintenance:
1. The sand/oil separator should be cleaned at least every 90 days or when accumulated
solids reach 25% of the sand/oil separator’s capacity. The waste hauler must identify the
disposal facility on the record of cleaning document.
2. Manhole covers should be checked regularly to ensure they are properly seated and
secure.
3. Check the sanitary tees on the inlet and outlet for damage or clogging. Replace or clean
as needed.
4. Check the sewer ejector pump for buildup and clean as necessary.
Make necessary repairs or replacements if damages or missing components are observed
during regular inspections.
APPENDIX
Sample Maintenance & Inspection Log
BioClean Downspout Filter Product Data
Storm Water Facilities Inspection and Maintenance Log
Facility Name
Begin Date End Date
Date Location Facility Description Inspected
by:
Cause for
Inspection
Exceptions Noted Comments and
Actions Taken
Instructions: Record all inspections and maintenance for all storm water facilities on this form. Use additional log sheets and/or
attach extended comments or documentation as necessary. Save all completed logs in one place and have them readily available for
the City of Bozeman’s review upon request.
Location — Specify the exact location of the facility either by its name, facility ID or physical location.
Inspected by — Note all inspections and maintenance on this form, including the required independent annual inspection.
Cause for inspection — Note if the inspection is routine, pre-rainy-season, post-storm, annual, or in response to a noted
problem or complaint.
Exceptions noted — Note any condition that requires correction or indicates a need for maintenance.
Comments and actions taken — Describe any maintenance performed and need for follow-up.
FIGURE 1FIGURE 1
FIGURE 6
Advantages
• 10 Year Warranty
• No Nets or Geofabrics
• Sleek Inline Design
• High Treatment Flow Rate
• High Bypass Flow Rate
• Low Cost
The Bio Clean Downspout Filter is
the industry’s leading solution
for treatment of roof runoff.
This technology is used to
treat commercial and industrial
roof tops along with highrise
buildings, parking structures
and residential buildings.
Available in 3 sizes, this filter
can easily adapt to downspouts
2” to 12” in diameter. The filter
comes standard with rubber
boots that allow for easy
installation to the downspout.
Proven since 2003, the Bio Clean
Downspout Filter has been used
on hundreds of installations
throughout the United States.
All internal components are
constructed of stainless steel.
The sleek inline design allows the
filter to be used in tight spaces.
Approved by the IAPMO, this filter
can meet all your needs.
Overview
www.BioCleanEnvironmental.com
Performance
• 93% Removal of TSS
• 87% Removal of Hydrocarbons
• Effective at Removing Metals, Nutrients
and Bacteria (Media Type)
Model # Inlet ID
(dia., in.)
Filter OD
(dia., in.)
Storage
Cap. (cu. ft.)
Filtered
Flow (gpm)
Bypass
Flow (gpm)
BC-DF4 4 6.625 0.9 249 566
BC-DF6 6 8.625 0.21 509 1006
BC-DF8 8 8.625 0.21 509 1006
BC-DF10 10 12.75 0.77 1145 2264
BC-DF12 12 12.75 0.77 1145 2264
Specifications
Water Flow Path
2972 San Luis Rey Rd
Oceanside, CA 92058
p 760.433.7640 f 760.433.3176
www.BioCleanEnvironmental.com
Downspout Filter PROVEN STORMWATER TREATMENT TECHNOLOGY
Operation
Application
Adapters
BioSorb Hydro-
Carbon Boom #40 Mesh Stainless
Steel Screen
(Wraps Around Cartridge)
(Additional Filter Media Available)
Powder Coated
Filter Housing
High Flow
Bypass
Stainless Steel
Filter Cartridge
Maintenance
Handles
(for easy removal)
Bypass Flow Path
Treatment Flow Path
IAPMO Testing
& Approval Listing
See our Website for Installation & Maintenance
Manuals at www.BioCleanEnvironmental.com
Easily Adapts to
Square or Rectangle
Downspouts
• Commercial
• Residentail
• Parking Structures
• Mixed Use
Fits Inline with Iron,
Steel or Plastic Pipe
Approvals
Installation & Maintenance