Storwater Issues

1. Storwater Issues Water that runs off of impervious surfaces such as roads, parking lots, or rooftops.

2. Why managestormwater? • 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.

3. Problems

7. 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.

8. 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.

9. 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.

10. Principle, Emergency, and WQ Spillways • Remove any material such as sediment, leaves, limbs, or anything that will restrict or stop the flow of water.

11. Principle, Emergency, and WQ Spillways

12. 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.

13. 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 it’s flow.

14. Inlets

17. Positrack skid steer with mulching cutter head

18. 4x4 Tractor on slope

19. Chipper Crew with Loader

20. Recently cut pond

27. Mb Erosion Control Matting and Blankets • Protects young plants • Promotes plant establishment • Helps reduce erosion -Temporary and permanent blankets -All must be approved by GDOT Protective coverings used to establish permanent vegetation

28. Blankets must be applied correctly

29. Blankets & sod must be anchored. Start at top of slope and work down.

31. Turf Maintenance Mowing - Remove ⅓ – 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

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

33. Daylily Asiatic jasmine Liriope Big periwinkle (Vinca major) Thrift (Phlox subulata) Iris OrnamentalGroundcovers

34. 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

35. 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