HomeMy WebLinkAboutIcon Minor Subdivision Stormwater Facilities Maintenance 040918
July 25, 2017
Updated April 9, 2018
Project No. 17007.02
STORM DRAINAGE FACILITY MAINTENANCE PLAN
FOR
ICON APARTMENT HOMES AT FERGUSON FARM
BOZEMAN, MONTANA
OVERVIEW NARRATIVE
The purpose of this maintenance plan is to outline the necessary details needed to determine who is
responsible for the maintenance of the facilities, when the facilities need to be maintained and who
owns the storm drainage facilities. The City of Bozeman Design Standards and Specifications Policy , dated
March 2004. The site stormwater improvements have been designed with the intent to meet the
current City of Bozeman drainage regulations for the entire site to the extent feasible.
Specific site information and criteria are described below:
I. Ownership of all facilities
Public access easements and public city park: The street public access easements and
the city park access easement will include ADS StormTech chamber infiltration systems,
inlets, and storm drain piping. The City of Bozeman will own all the stormwater facilities
within their easements except for the ADS StormTech chamber infiltration systems. The
Bozeman Apartment Group, LLC will own all retention/detention systems within the public
access easements and public city park.
Apartment Community: Bozeman Apartment Group, LLC will be own all stormwater
facilities, including the ADS StormTech chamber systems, pervious pavers, dry wells, inlets
and storm drain piping within Lot 3A of Minor Subdivision 365 that is not within the public
access easements.
II. Inspection Thresholds for Cleaning
ADS Chamber System:
V:17007.02_SD Maintenance Plan 2 (03/07/18) SH/JL
If average depth of sediment exceeds 3 inches, clean ADS Chamber System.
Refer to Isolator Row Maintenance Plan attached.
Pervious Pavers:
If average depth of sediment exceeds 2 inches, clean paver system. Refer to
PaveDrain specifications attached.
Dry Wells:
If sediment in sump exceeds 5 inches or grate is more than 25% clogged with
debris, clean grate and/or structure.
Storm Drain Inlets and Manholes:
If sediment in sump exceeds 5 inches or grate is more than 25% clogged with
debris, clean grate and/or structure.
Storm Drain Piping:
If sediment in sump exceeds 2 inches, clean pipe.
III. Cleaning:
ADS Chamber System:
To clean ADS Chamber Systems used the JetVac process outlined in the
Isolator Row Inspection/Maintenance plan attached.
PaveDrain:
To clean PaveDrain use an approved vacuum outlined in the PaveDrain
specifications attached.
Nearby Owner of Vacuum Head:
David – Rocky Mountain Super Vac
73 Morning Glory Lane
Kalispell, MT 59901
406-257-4639
Manholes, Inlets, Dry Wells:
To clean grate of structure, remove and dispose of debris clogging the grate.
To clean structure, use catch basin vacuum to remove sediment and debris.
Pipes:
To clean pipes, flush pipe at inlet structure and ensure that debris is captured
at outlet structure and is removed.
IV. Schedule:
ADS Chamber System:
Inspection: Every 6 months
Vacuum Manholes/Chambers: Every 5 years or as needed based on
inspection
Note: Refer to Isolator Row Maintenance Plan attached.
Pervious Pavers:
Inspection: Every 6 months
Vacuum pavers every 5-7 years or as needed based on inspection.
Note: PaveDrain specifications attached.
V:17007.02_SD Maintenance Plan 3 (03/07/18) SH/JL
Dry Wells:
Inspection: Every 6 months
Vacuum Drywells: Every 5 years or as needed based on inspection
Storm Drain Inlets and Manholes:
Inspection: Every 6 months
Vacuum Inlets/Manholes: Every 5 years or as needed based on inspection
Storm Drain Piping:
Inspection: Inspect inverts and outlet inverts every 6 months
Flush pipes every 5 years or as needed based on inspection and condition of
inlet or manhole.
V. Responsible Party:
Public access easements and public city park: The City of Bozeman will be responsible
for the inspection and maintenance of the stormwater inlets, manholes and pipes within
their easements.
Apartment Community: Bozeman Apartment Group, LLC will be responsible for all
stormwater facilities located within Lot 3A of Minor Subdivision 365. And will be
responsible for maintaining any ADS StormTech Chambers within the public access
easements. This includes the chamber system designed to retain the deficient volume from
the Ferguson Farm subdivision to the south.