Water that runs off of impervious surfaces such as roads, parking lots, or rooftops'

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Water that runs off of impervious surfaces such
as roads, parking lots, or rooftops.
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Why manage stormwater?

• To prevent flooding during heavy rains.
• To keep our rivers and streams healthy.
• To meet state and federal requirements.
• To provide for future growth and development.

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Problems
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Dam Top and Slopes/Faces

• A dam by definition is an artificial barrier
  which impounds water.
• Goal Prevent Tree Growth and Erosion
• Ensure integrity of dam stays at highest level.
• Trees located on a dam may fall creating a weak
  point and with a high water level, the dam could
  not withhold this pressure.

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Dam Top and Slopes/Faces

• Prevent Erosion
• Stabilizing exposed soil and dirt with grass and
  other vegetation that has a substantial root
  system and holds the soil in place.

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Principle, Emergency, and WQ Spillways

• Prevent stormwater from being unintentionally
  held, instead of being released at the designed
  controlled rate and prevent structural damage.
• Water that is being held longer than 24-48 hours
  is creating a possible safety issue.

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Principle, Emergency, and WQ Spillways

• Remove any material such as sediment, leaves,
  limbs, or anything that will restrict or stop the
  flow of water.

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Principle, Emergency, and WQ Spillways
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Principle, Emergency, and WQ Spillways

• Remove any large debris to prevent runoff from
  being route in alternate direction.
• Used in high water elevations to discharge water
  out of facility and prevent structural damage.

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Inlets

• Prevent stormwater from entering at an
  uncontrolled rate and remove large floatable
  debris.
• Runoff entering at uncontrolled rate increases
  the risk of erosion
• Removing floatable material at this point reduces
  the chance of your outlet structure from being
  clogged or restricting its flow.

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Inlets
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Positrack skid steer with mulching cutter head

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4x4 Tractor on slope

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Chipper Crew with Loader

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Recently cut pond

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Erosion Control Matting and Blankets
Protective coverings used to establish permanent
vegetation

• Protects young plants
• Promotes plant establishment
• Helps reduce erosion
• -Temporary and permanent blankets
• -All must be approved by GDOT

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Blankets must be applied correctly
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Blankets sod must be anchored. Start at top of
slope and work down.
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Turf Maintenance
Mowing - Remove ? ½ top growth

• Fertilizer
• Apply 400 lbs 10-10-10 per acre
• (10 lbs/1000 square feet)
• In 6 8 weeks apply an additional
• 90 lbs of 34-0-0 per acre
• (2 lbs/ 1000 square feet)

Lime - Apply 1 ton every 4 6 years or as per
soil test
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Ornamental Grasses

• River Oats (Chasmanthium latifolia)
• Maiden grass (Miscanthus spp.)
• Muhly grass (Muhlenbergia capillaris
• Panic grass/Switch grass (Panicum virgatum)
• Indian grass (Sorgastrum nutans)

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OrnamentalGroundcovers

• Daylily
• Asiatic jasmine
• Liriope
• Big periwinkle (Vinca major)
• Thrift (Phlox subulata)
• Iris

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Herbaceous Ornamentals

• - Use plants suited to wet and dry conditions
• - Base planting on mature plant size
• - Plant in fall or early spring
• Fertilize in early spring
• May need water during
• establishment

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Ornamental Maintenance
Turf

• Establishment
• Plant in fall or early spring
• Spacing depends on size of mature plant

• Fertilizer
• Apply 400 lbs of 10-10-10 per acre per year
• (10 lbs per 1000 square feet)

Herbaceous Ornamentals
Lime - Apply 1 ton every 4 6 years or as per
soil test Lime
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