136 SECTION 156
156.01 Air Compressor
Furnish a portable air compressor capable of supplying at least 100 pounds per square inch of air pressure at the nozzle. Equip compressors with traps that maintain the compressed air free of oil and water.
156.02 Fogger
Produce a fog spray from nozzles that atomize the droplets and a system capable of keeping a large surface area damp without allowing water to drip, flow, or puddle on the surface. Use high pressure equi pment that generates a minimum of 1200 psi at 2.2 gpm, or low pressure equipment having nozzles capable of supplying a maximum flow rate of 1.6 gpm.
156.03 Milling Machine
Use a self-propelled milling machine with a control system that automatically adjus ts the elevation and transverse slope of the milling head. Provide a 30 foot minimum length skid, rolling traveling straightedge, or other approved device to establish the grade reference for control of the milling head. Use a system that permits the grade reference device to operate on either side of the milling machine and maintains the desired transverse slope regardless of changes in the elevation of the milling head. Provide conveyors capable of side, rear, or front loading and provide the necessary e quipment to transfer the milled material from the roadway to a truck. In-Depth Revi ew 2022 Section 201 137 SECTION 201 CLEARING AND GRUBBING
201.01 Description
This work consists of clearing, grubbing, removing, and disposal of vegetation and debris.
201.02 Equipment
Reserved.
201.03 Materials
Reserved.
201.04 Construction Requirements
The Engineer will establish the right of way and construction limits and designate the items to remain. Remove trees and stumps located within the boundaries of the roadbed to a depth of 3 feet below the final dirt grade. Remove trees and stumps located outside the boundaries of the roadbed and within the construction limits to a depth of 18 inches below the final dirt grade. Prune branches and remove loose bark on trees or shrubs that were broken, cut, or scarred during construction activities. Trim tree branches extending over the roadbed to give a clear height of 20 feet, or according to local ordinances, whichever is greater. The Engineer may allow burning of perishable materials when permitted under applicable laws and ordinances. Provide a watch person on site to monitor the burning of perishable materials. Backfill and compact all cavities with a suitable material, except in areas to be excavated. Compact backfill material within the boundaries of the roadbed as specified in Section 203.04 E.2, “Compaction Control, Type A”. Compact backfill material outside the boundaries of the roadbed as specified in Section 203.04 E.4, “Compaction Control, Type C”.
201.05 Method of Measurement
The Engineer will measure as specified in Section 109.01, “Measurement of Quantities” and as follows: The Engineer will measure stumps by the average diameter of the stump at ground level. Stumps 8 inches in diameter or less will be included in the bid item “Clearing & Grubbing” or “Removal of Trees & Brush”. The diameter of trees will be measured at a height of 24 inches above the existing ground. Trees will be classified based on Table 201 -01: