NCS000423_General MS4 Operation and Maintenance Plan_20220107

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MS4 Operation and Maintenance Plan
City of Concord, North Carolina
Purpose
Establish procedures to address and reduce pollutant loads that have the potential to enter the City of
Concord's MS4 network and surface waters while also providing a maintenance plan for City maintained
stormwater infrastructure.
Program Activities
• Street Sweeping
• Stormwater Asset Inspections
• Stormwater Infrastructure Maintenance
• Stormwater Outfall Maintenance
Street Sweeping
The Water Resources Department's Stormwater Division currently operates two (2) street sweeper
vehicles and employs two (2) full-time equipment operators to conduct the street sweeping program.
• All City -maintained streets with curb are swept according to established routes and schedules.
Streets are swept a minimum of once per month or more frequently depending on the condition
and cleanliness of streets and gutters and the season.
• Street sweeper routes are tracked through the Geotab software.
• Street sweeper operators utilize a map book to track which of the 31 designated routes was
completed each day.
• If City staff or citizens identify an area with potential to contribute to stormwater pollution, the
Stormwater Division is notified.
• The number of loads disposed of by the street sweepers is monitored on a monthly basis.
Stormwater Asset Inspections
The Stormwater Division is responsible for coordinating and conducting inspections of all City
maintained stormwater assets (ditches, pipes, catch basins, outfalls, manholes).
Currently, inspections of ditches, inlets, pipes, and manholes are conducted on an as -needed
basis, dependent upon staff or citizen reports. Major stormwater outfalls are inspected
routinely, according to the City's Dry Weather Flows Program.
This City is continually updating and adding to the asset inventory and GIS map of the
infrastructure network. The department's Senior GIS Analyst has divided the City into 13
sections and has been updating the sections one at a time. The Water Resources Department
Revised December 2021

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also employs two (2) GIS Technicians who work on collecting asset data from new developments
and updating information for preexisting assets.
Any issues discovered during asset inspections shall be reported to the Stormwater
Administrator to be documented and investigated. If repairs are necessary, the Stormwater
Administrator will coordinate with the appropriate staff and departments to ensure the needed
repairs are made.
Stormwater Infrastructure Maintenance
The Stormwater Division is responsible for identifying and coordinating maintenance issues related to
City maintained stormwater infrastructure.
• Crews work systematically through the sewer subbasins to proactively clean and inspect
stormwater infrastructure (pipes, ditches, catch basins).
• Additional cleaning of stormwater infrastructure is handled on an as needed basis, dependent
upon condition of assets and staff or citizen reports.
• If a stormwater asset is identified as having the potential to contribute to stormwater pollution
or flooding the Stormwater Administrator and Water Resources Director will be notified and
appropriate staff will be assigned to address the issue.
Stormwater Outfall Maintenance
The Stormwater Division is responsible for inspecting and coordinating maintenance of City owned
stormwater outfalls.
• Stormwater Division staff will annually conduct dry weather screenings of 20% of all major
outfalls (>36" or >12" in industrial areas)
o Additional stormwater outfalls shall be inspected at least once per permit cycle.
o Stormwater outfalls are included in the ongoing asset inventory and assessment project.
• If a potential illicit discharge is detected during dry weather screening, routine inspections, or as
a result of a staff or citizen report it shall immediately be reported to the Stormwater
Administrator who will coordinate an investigation and plan for remediation if necessary.
• Any outfalls that are deemed in need of repair or maintenance during inspections shall be
reported to the Stormwater Administrator for repair if the structure is part of the City's
maintained stormwater infrastructure.
• Illegal dumping or other potential sources of pollution discovered during routine inspections
shall be reported to the Stormwater Administrator for removal.
• The Stormwater Division will maintain a map of all stormwater outfall identified as a result of
routine inspections and asset inventory efforts. All associated maintenance activities will be
documented by Stormwater Division staff. Quantities of litter/pollutants removed will be logged
annually.
Revised December 2021