Payment will be made under: Pay Item Pay Unit Matting For Erosion Control Square Yard
ROCK INLET SEDIMENT TRAP -1 DESCRIPTION Construct, maintain and remove devices around catch basins and/or drop inlets to reduce water velocity and contain sediment. Work includes furnishing all fence posts, hardware cloth, hardware, stone and other materials, installing and maintaining the 1/4 inch hardware cloth. The actual conditions which occur during the construction of the project will determine the quantity of rock inlet sediment traps constructed. The quantity of inlet sediment traps may be increased, decreased or eliminated entirely as directed by the Engineer . Such variations in quantity will not be considered as alterations in the details of construction or a change in the character of the work. -2 MATERIALS Refer to Division 10. Item Section Sediment Control Stone, Standard Size No. 5 or 57 1005 Stone for Erosion Control, Class A or Class B 1042
Provide steel posts in accordance with Subarticle 1605- 2(A).
Provide plastic ties, wire fasteners or other approved attachment device.
Provide hardware cloth with 1/4 inch openings constructed from 24 gauge wire and with at least 48 inches width as specified in ASTM A740. -3 CONSTRUCTION METHODS
Place structural stone , Class B, around the outside perimeter of the inlet structure with approximately 2:1 side slopes and plate the upstream side with sediment control stone.
Place structural stone , Class A , around the outside perimeter of the inlet structure with approximately 2:1 side slopes and plate the upstream side with sediment control stone.
Construct rock inlet sediment trap T ype C devices as shown in the plans and at other locations as directed by the Engineer . Attach hardware cloth to posts with wire staple or other acceptable methods. -4 MAINTENANCE AND REMOVAL Maintain the rock inlet sediment trap, remove and dispose of silt accumulations at the inlet sediment traps in accordance with Section 1630 or as directed by the Engineer . Remove rock inlet sediment traps as the project nears completion, or as directed by the