Stormwater Management
Operations
Stormwater Operations are responsible for the maintenance of public
ditches and drainpipes citywide. Private drainage systems are the
responsibility of the property owner. Drainage systems are considered
public if they receive runoff from public rights of way or property.
Operations take on two key roles:
Facility and Ditch
Maintenance
Ditch maintenance consists of cutting vegetation and removing
debris/sediment that impedes the natural flow of water. If weather
permits, ditch crews will cut public ditches 3 times per year to maintain
the flow line. Residents are responsible for maintaining the banks of
ditches that are adjacent to or run through their property.
Residents are reminded that it is illegal to dump leaves, grass clippings,
and debris into the drainage system and ditches. Ditches should never be
burned. The vegetation in ditches provides stability to the banks and
natural filtration of water.
Crews regularly clean catch basins, drop inlets and outfalls to remove
debris and blockages. Crews can also flush sediment from clogged pipes. A
vacuum truck is used to pump high-pressure water through drainpipes.
- Fall Stormwater Tip
When Autumn (Fall) arrives and it is time to rake the leaves, here is
what you can do to help prevent stormwater runoff, a major pollutant to
our rivers, lakes and the Chesapeake Bay.
Do not rake leaves into ditches, sweep them down storm drains, gutters
or curbing. Doing so will cause blockages and lead to flooding.
Do not burn leaves in ditches. Burning in ditches causes erosion and
allows pollution to wash downstream to our waterways. Rake leaves and
put them out in clear plastic bags at the curbside for pickup, or mulch
and compost them for use in your garden.
REMEMBER THAT ONLY RAINWATER GOES DOWN OUR STORM DRAINS!
- Hurricane Response
City staff receives regular weather reports and updates prior to severe
weather.
When the threat of severe weather arrives, Stormwater Management
Operations crews work citywide to remove debris from blocking outfalls;
remove blockages from backyard and roadside ditches to ensure water
flow; and clean debris from around and inside storm drains to keep
street from flooding.
When the threat of severe weather subsides, Stormwater Management
Operations crews work citywide assisting in the removal of fallen trees
from roadways; help block of roads subjected to fallen wires; and repeat
the activities taken prior to the storm.
Facility and Ditch Repair
Construction crews respond to reports of cave-ins on storm drainpipes
and falling ditch banks throughout the City. Crews are also involved in
small drainage projects.
- Cave-ins
A cave-in associated with a storm drainpipe can be caused by a failure
at the pipe joint or in the pipe itself. Cave-ins also occur at drainage
structures such as catch basin, drop inlets or storm drain manholes.
Construction crew supervisors investigate all reports of storm drain
cave-ins. If necessary, crews will be instructed to place barricades or
fill in the voided area with dirt, stone or asphalt depending on the
surrounding area to make it “safe”. Subsequent repairs will be either scheduled for
crews in-house or tagged for contractual repair.
Note that private systems such as those in apartment complexes, shopping
centers, private parking lots, etc are the responsibility of the
property owner. If a driveway pipe is associated only with a driveway
and the entire ditch is not piped, then any cave-in on this pipe belongs
to the property owner.
- Minor Bank and Structure Repair
Construction crews perform numerous repairs on storm drain structures
such as catch basins, drop inlets and manholes. Crews also inspect and
repair the banks of public ditches to prevent blockages and subsequent
ditch failure.
- Maintenance Projects
Construction crews assist in identifying, planning and implementing
various maintenance projects to alleviate “hot spots” citywide. This
work is typically performed through contractual services. Initiatives
also include Citywide Ditch and Outfall Maintenance Program and annual
Storm Drain Rehabilitation projects.
Did You Know?
In FY 05-06,
- Stormwater Management Maintenance Crews responded to 533 customer
calls.
- Stormwater Management Maintenance crews cleaned approximately 35
miles of storm drainpipe; cleaned over 198 miles roadside and backyard
ditches; removed 314 blockages from public ditches; and serviced 13, 934
catch basins/drop inlets. Crews cleaned 36 outfall pipes every 2 weeks
and 51 outfall pipes every week.
- Stormwater Management Maintenance crews disposed of 13,765 truck
loads of debris at the City landfill.
- Stormwater Management Construction crews performed 325 safe ups in
the street and 488 in the dirt. They repaired 187 cave-ins and 41
drainage structures.
- Contractually, Public Works was responsible for over 400 storm drain
cave-in repairs at over 150 locations; over 2500 linear feet of storm
drainpipe was cleaned and video inspected; and; over 1500 linear feet of
liner repair were performed through storm drain rehabilitation.
- More than 10 Maintenance Projects were completed. Over 10 additional
“hot spots” were identified as potential future Maintenance Projects.
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