1. Course Highlights
Introduction
Planning for Erosion and Sediment Control
Erosion Control BMP Implementation
Sediment Control BMP Implementation
Class Exercise
Field Demonstration of BMPs

2. SEDIMENT CONTROL BMPs SC-1 SILT FENCE SC-4 CHECK DAMS SC-5 FIBER ROLLS
SC-6 GRAVEL BAG BERM
SC-8 SAND BAG BARRIER
SC-9 STRAW BALE BARRIER
SC-10 STORM DRAIN INLET PROTECTION

3. SEDIMENT CONTROLS
Intercept sediment laden runoff, slow the flow, and allow the suspended sediment particles to drop out of suspension.

4. SEDIMENT CONTROL BMPs SC-1 Silt Fence
Permeable fabric designed to intercept and slow flow of sediment-laden sheet flow runoff

5. SC-1 SILT FENCE Material Requirements
Silt fence shall be woven polypropylene fabric
Minimum width of 900 mm (36 inches)
The fabric shall conform to the requirements in ASTM designation D4632 and have an integral reinforcement layer
The permittivity of the fabric shall be between 0.1 sec -1 and in conformance with ASTM designation D4491
ASTN is the American Society for Testing and Materials

6. SC-1 SILT FENCE Stakes Requirements
Wood stakes shall be commercial quality lumber
Stake dimensions: 50 x 50 mm by 1200 mm in length
Stakes shall be free from decay, splits or cracks longer than the thickness of the stakes
Bar reinforcement may be used, and its size shall equal to or greater than (4) and end protection is required
2.5 m maximum stake spacing

7. SC-1 SILT FENCE Design and layout
Maximum length of slope draining to any point shall be 61 m (200 ft)
Slope of area draining to the silt fence shall be less than 1:1 VH
For slopes steeper than 1:2 that contain large numbers of rocks or dirt clods that tend to dislodge additional protection may be necessary

8. SC-1 SILT FENCE Installation Requirements
“Key-in” bottom of silt fence a minimum of 150 mm (12 inches)
Reach of silt fence shall not be longer than 150 m (490 ft)
Construct each reach so that the base elevation does not exceed 1/3 the height of the barrier
Construct silt fence with a set-back of a least 1 m (3 ft) from the toe of the slope

9. SC-1 SILT FENCE 2000 to 2003 Manual Changes: Added limitations for:
Not implementing on slope subject to creeping, slumping and landslides
Not implementing in areas of concentrated flow
Do not use silt fences for diverting flow
Added specification for silt fence to meet Standard Specification Section
Added specification to key silt fence a minimum of 300 mm

10. SEDIMENT CONTROL BMPs SC-4 Check Dams
Are small devices constructed of rock, gravel bags, sand bags, fiber roll, of other proprietary devices placed across natural or man-made channels or ditches

11. SC-4 CHECK DAMS Material (bags) Requirements
Bags shall be either polypropylene, polyethylene, or polyamide woven fabric
Minimum unit weight of 135 g/m2 (four ounces per square yard)
Burst strength exceeding 2,070 kPa (300 psi) in conformance with ASTM designation D3786
Ultraviolet stability exceeding 70% in conformance with ASTM designation D4355

12. SC-4 CHECK DAMS Bag size Requirements : Fill material:
Each gravel-filled bag shall have a length of 450 mm (18 inches), width of 300 mm (12 inches), thickness of 75 mm (3 inches), and mass of approximately 15 kg (33 lbs)
Alternate bags sizes need approval by the Resident Engineer
Fill material:
Fill material shall be between 10 mm and 20 mm (0.4 and 0.8 inches) in diameter
Be free from clay balls, organic matter and other deleterious material
Filled bag shall be between 13 kg and 22 kg (28 and 48 lbs) in mass

13. SC-4 CHECK DAMS Installation Requirements
Limit area draining to check dams to 4 ha (10 ac) or less
Install along a level contour
Tightly abut bag and stack in a pyramid fashion
Place at a distance and height to allow small pools to form behind them
Install the first check dam 5 m (16 ft) from the outfall
Space bags based on slope gradient and soil type
Gravel bags shall not be stacked higher than 1 m (3.2 ft)

14. SC-4 CHECK DAMS 2000 to 2003 Manual Changes:
Gravel bags, fiber roll and other proprietary products add as construction material
Fiber rolls need RE or NPDES Coordinators approval
Gravel bags may be used with new specifications
Gravel diameter between mm
Bag size and material added
Installation specification for stacking

15. SEDIMENT CONTROL BMPs SC-Fiber Rolls
Consist of wood excelsior, rice or wheat straw, or coconut fibers that are rolled and bound into a tight tubular roll and placed on slopes to intercept runoff

16. SC-5 FIBER ROLLS Material Requirements:
Fiber roll shall be either (1) prefabricated rolls or (2) rolled tubes of erosion control blankets
For filled rolled fiber rolls; roll into a minimum of 200 mm (8 in) diameter, and bond every 1.2 m (4 ft) along the length of the roll

17. SC-5 FIBER ROLLS Installation Requirements:
For breaking-up slope length fiber roll spacing is based on slope inclination
1:4 or flatter – spacing shall be placed 6.0 m apart
1:4 to 1:2 – spacing shall be 4.5 m apart
1:2 or greater – spacing shall be 3.0 m apart
Place fiber rolls into a 50 to 100 mm trench
Stake or tie fiber rolls into place
Tied fiber rolls staking is spaced at 600 mm (2 ft) apart
Stake spacing at 1.2 m (4 ft) apart

18. SC-5 FIBER ROLLS 2000 to 2003 Manual Changes:
Fiber roll materials change
Specifications that rolls be placed at grade breaks, toe and face of slopes
Specifies that they can be used for drain inlet protection
Specifies that they can be used as check dams
Larger size may be needed at toes of slopes
Restricts use on slopes subject to creep, slumping or landslides
Spacing intervals on slopes reduced
Overlapping of ends and new detail
Maintenance features added with sediment build-up removal

19. SEDIMENT CONTROL BMPs SC-6 Gravel Bag Berms
Are woven fabric type of bags placed across slopes to intercept runoff, reduce its flow velocity, and release it as sheet flow

20. SS-6 GRAVEL BAG BERMS Material (bags) Requirements
Bags shall be either polypropylene, polyethylene, or polyamide woven fabric
Minimum unit weight of 135 g/m2 (four ounces per square yard)
Burst strength exceeding 2,070 kPa (300 psi) in conformance with ASTM designation D3786
Ultraviolet stability exceeding 70% in conformance with ASTM designation D4355

21. SS-6 GRAVEL BAG BERMS Bag size Requirements : Fill material:
Each gravel-filled bag shall have a length of 450 mm (18 inches), width of 300 mm (12 inches), thickness of 75 mm (3 inches), and mass of approximately 15 kg (33 lbs)
Alternate bags sizes need approval by the Resident Engineer
Fill material:
Fill material shall be between 10 mm and 20 mm (0.4 and 0.8 inches) in diameter
Be free from clay balls, organic matter and other deleterious material
Filled bag shall be between 13 kg and 22 kg (28 and 48 lbs) in mass

22. SS-6 GRAVEL BAG BERMS Installation requirements:
Install along a level contour
Turn ends of bags up slope to prevent flow around ends
Use in conjunction with temporary soil stabilization
Construct barriers with a set-back of a least 1 m from toe of slope
For concentrated flows: stack bags using a pyramid approach, overlap upper joints from lower rows

23. SS-6 GRAVEL BAG BERMS 2000 to 2003 Manual Changes:
Added language for application where flows are moderately concentrated
Revised specifications for fill materials
Burlap bags are no longer allowed
Added application and installation for linear sediment control, on slopes, toe of slopes, stockpiles, concentrated flows and perimeter barriers
Add Certification of Compliance per Standard Specs

24. SEDIMENT CONTROL BMPs SC-8 Sandbag Barrier
Are a woven fabric type of bag designed to intercept and slow flow of sediment-laden sheet flow runoff

25. SC-8 SANDBAG BARRIER Material (bags) Requirements
Bags shall be either polypropylene, polyethylene, or polyamide woven fabric
Minimum unit weight of 135 g/m2 (four ounces per square yard)
Burst strength exceeding 2,070 kPa (300 psi) in conformance with ASTM designation D3786
Ultraviolet stability exceeding 70% in conformance with ASTM designation D4355

26. SC-8 SANDBAG BARRIER Bag size Requirements : Fill material:
Each gravel-filled bag shall have a length of 450 mm (18 inches), width of 300 mm (12 inches), thickness of 75 mm (3 inches), and mass of approximately 15 kg (33 lbs)
Alternate bags sizes need approval by the Resident Engineer
Fill material:
All sandbag fill material shall be non-cohesive, Class 1 or Class2 permeable material free from clay and deleterious material
Conform to section of the Standard Specifications
Fill Material is subject to approval of the RE

27. SC-8 SANDBAG BARRIER Installation requirements:
Install along a level contour
Turn ends of bags up slope to prevent flow around ends
Use in conjunction with temporary soil stabilization
Construct barriers with a set-back of a least 1 m from toe of slope

28. SC-8 SANDBAG BARRIER 2000 to 2003 Manual Changes:
Burlap bags are no longer allowed
Category changed from “linear sediment removal” to “Linear sediment control”

29. SEDIMENT CONTROL BMPs SC-9 Straw Bale Barrier
Are temporary linear sediment barriers consisting of straw bales, designed to intercept and slow sediment-laden sheet flow runoff

30. SC-9 STRAW BALE BARRIER Material (bales) Requirements
Material shall conform to the provisions in Standard Specifications Section “straw”
Straw shall be derived from wheat, rice, or barley
The contractor shall furnish evidence that clearance has been obtained from the County Agriculture Commissioner, as required by law, if straw is obtained from outside the country

31. SC-9 STRAW BALE BARRIER Straw Bale size Requirements:
Each bale shall be a minimum of 360 mm (14 in) wide, 450 mm (18 in) in height, 900 mm (36 in) in length and shall have a minimum mass of 23 kg (51 lbs)
Bales shall be composed entirely of vegetative matter, except binding material

32. SC-9 STRAW BALE BARRIER Stakes
Wood stakes shall be commercial quality lumber
Stake dimensions: 50 x 50 mm by 1200 mm in length
Stakes shall be free from decay, splits or cracks longer than the thickness of the stakes
Bar reinforcement may be used, and its size shall equal to or greater than (4) and end protection is required
2.5 m maximum stake spacing

33. SC-9 STRAW BALE BARRIER Installation Requirements:
Limit upstream drainage area to 0.3 ha/100 m
Limit length of slope draining to barrier to 30 m (100 ft)
Slopes of 2:100 V:H or flatter are preferred
If slope exceeds 1:10 V:H slope length must be less than 15 m (50 ft)
Install along level contours
Bales must be trenched in and tightly abutted together
Construct barriers with a set-back of a least 1 m from toe of slope

34. SC-9 STRAW BALE BARRIER 2000 to 2003 Manual Changes:
Added limitations verbiage that bales can invite undesirable non-native plants and be an attractive animal food source
Added option to allow use of #4 steel bars as stakes

35. SEDIMENT CONTROL BMPs SC-10 Storm Drain Inlet Protection
Device used at storm drain inlets to detain of filter sediment-laden runoff

36. SC-10 INLET PROTECTION DI Protection Types Filter fabric fence
Excavated drop inlet sediment trap
Gravel bag
Foam barrier and fiber rolls

37. SC-10 INLET PROTECTION General requirements:
Requires adequate area for ponding without encroaching upon the traveled way
Frequent maintenance is required
Draining areas greater than 0.4 ha (1 ac) shall be routed to a sediment trapping device
May require other methods of temporary protection to prevent sediment-laden storm water and non-storm water flow from entering inlets
If high flows are expected use other sediment trapping devices in conjunction with inlet protection

38. SC-10 INLET PROTECTION Type -1 Filter Fabric Fence
Appropriate in open areas subject to sheet flows
Flows should not exceed m3s (0.5 cfs)
Do not place fabric underneath grate inlet

39. SC-10 INLET PROTECTION Type-2 Excavated Drop Inlet Sediment Trap
Appropriate where relatively high heavy flows are expected and over flow capacity is needed
Size excavated trap to provide a minimum storage capacity of 130 m3 per ha of drainage area

40. SC-10 INLET PROTECTION Type-3 Gravel Bag
Appropriate where flows exceed m3/s (0.5 cfs) and it is necessary to allow overtopping to prevent flooding
Flows shall not overtop curb
Construct in accordance with BMP SC-6
In areas with high silts and clayey soils use additional media for protection

41. SC-10 INLET PROTECTION Type-4 Foam Barriers and Fiber Rolls
Not appropriate for locations where they can not be properly anchored
Intended for use in areas around inlets are unpaved
Requires RE or DSWC approval

42. SC-10 INLET PROTECTION 2000 to 2003 Manual Changes:
Sandbags are no longer allowed (gravel bags)
Added option of using foam barriers of fiber rolls if they can be properly anchored (RE/DCSWC approval)
Type 1 - use of filter fabric fence added to spec when grade is established and erosion control seeding is installed or pending
Type 2 – excavated drop inlet specified in areas of exposed soils
Type 3 – gravel bag barriers are specified in areas of paved surfaces
Added specification on removing built-up sediment from foam barriers and silt fences