The Erosion Control Inspection One Man’s Journey of Epic Proportions

1. The Erosion Control InspectionOne Man’s Journey of Epic Proportions Lived by Zach Pilichowski Stormwater and Erosion Control Engineer, SE-Region

2. So, You Have to Do an Erosion Control Inspection. Who’s protecting these inlets!! What’s a wattle and where did the contractor put them?

3. The Basics of an Inspection Why you have to do an inspection When you have to do an inspection How you do an inspection

4. The Basics of Why You Have to Do an Inspection Required by Trans 401.10 Determines if the BMP’s have been properly implemented, installed and maintained Identifies corrective action that is needed

5. The Basics of When You Have to Do an Inspection Once per week Within 24 hours after every precipitation event of ½” or more during a 24-hour period At the beginning and end of each stage After installation of BMP’s At the completion of the project

6. The Basics of How to Do an Inspection The prime contractor should be invited to accompany the inspector when doing inspections The invite must be sent at least 1-hour in advance of the inspection Use forms WS1072 and WS1074 from pantry software to complete the inspections

7. The Paperwork

8. Form WS1072 Erosion control diary/inspection form Pantry software You all should have one

10. Form WS1074 Erosion control order form Pantry software Used if corrections or changes are needed Prime contractor is not required to make changes unless an order is sent You all should have one

12. What Do You Do With All This Paperwork Keep all inspections and orders in the field office, with the ECIP, in a binder This needs to be available to the public

13. In the Field

14. Typical Best Management Practices(BMP’s) Silt Fence Ditch Checks Erosion Mat Mulch Inlet Protection Turbidity Barrier Grading Practices

15. Silt Fence SDD 8e9-6 Needs to be entrenched Joints should be twisted or overlapped Post spacing, 3’ max or 8’ max if using woven geotextile fabric Fabric should face the flow Should go up and over a culvert

17. Ditch Checks, Types Erosion Bales Straw Wattles

18. Ditch Checks, Types Silt Dikes Bio-Logs

19. Ditch Checks, Types Rock Bags

20. Ditch Checks SDD 8e8-3 Entrenched, 4” for erosion bales and 2” for all other types Minimum of 10” height above the flow line Erosion bales should be double row

22. Erosion Mat, Types

23. Erosion Mat, Types 628.2006 – Erosion Mat Urban Class I Type A 628.2008 – Erosion Mat Urban Class I Type B

24. Erosion Mat Should not be stretched Should be laying flat on the soil Properly overlapped and shingled Properly anchored Must be entrenched on the leading edge

25. Erosion Mat

26. Erosion Mat Shingling

27. Mulch • Three methods available for installation • Netting • Tackifier • Crimping

28. Mulch, Netting Method Uniform depth of ½” to 1-1/2” Anchored with netting or twine secured to pegs or staples Begin at top of slope and proceed downwards

29. Mulch, Tackifiers Spread by machine to uniform ½” to 1” depth ½ to 3 tons per acre A spray on non-asphaltic tack anchors the mulch

30. Mulch, Crimping Uniform depth of ½” to 1-1/2” Anchored with a mulch tiller designed to crimp mulch into the soil Crimped a minimum of 1-1/2” and a different anchor method must be used if 1-1/2” is not possible

31. Inlet Protection SDD 8e10-2 Four types, A,B,C,D

32. Inlet Protection Type A Type b

33. Inlet Protection Type C Type D

35. Turbidity Barrier SDD 8e11-2 Should be 2’ higher than Q2 elevation or estimated high water elevation, whichever is greater Should be anchored with sandbags Post spacing 10’ max

37. Grading Practices Leave existing vegetation in place as long as possible Limit exposed areas Topsoil and restore areas as soon as grading is completed Staging

38. Let’s Do an Inspection

39. Silt Fence

40. Silt Fence

41. Silt Fence

42. Ditch Checks

43. Ditch Checks

44. Ditch Checks

45. Erosion Mat

46. Erosion Mat

47. Mulch

48. Inlet Protection

49. Inlet Protection

50. Inlet Protection