Reconstruction of damaged road from junction point of Kopili power Station to Kopili Valve House

Amount

Jungle Clearing including cutting bamboo and trees below 500 mm girth and removing the same out side the limit as directed (Medium)

Making 50 mm x 50 mm Furrows (Making 50 mm x 50 mm furrows, 25mm deep, 450 to the center line of the road and at one metre interval in the existing thin bituminous wearing coarse including sweeping and disposal of excavated material within 1000 meters lead.)

Surface Drains in Ordinary Rock (Construction of unlined surface drain of average cross sectional area 0.4 sqm in ordinary rock to specified lines, grades, levels and dimensions as per approved design and to the requirement of clause 301 to 309. Excavated to be used in embankment at site.) Mechanical Means

Maintenance of Earth Shoulder (stripping excess soil) (Stripping excess soil from the shoulder (Average depth of 75mm) surface to achieve the approved level and compacting with plate compactor)

Filling Pot- holes and Patch Repairs with - Bituminous concrete, 40mm. (Removal of all failed material, trimming of completed excavation to provide firm vertical faces, cleaning of surface, painting of tack coat on the sides and base of excavation as per clause 503, backfilling the pot holes with hot bituminous material as per clause 504, compacting, trimming and finishing the surface to form a smooth continuous surface, all as per clause 3004.2. (including carriage of mixed materials upto 10.0km. initial lead from mixing plant.) for grading II Material

Water Bound Macadam (Providing, laying, spreading and compacting stone aggregates of specific sizes to water bound macadam specification including spreading in uniform thickness, hand packing, rolling with vibratory roller 8-10 tonnes in stages to proper grade and camber, applying and brooming requisite type of screening/ binding material to fillup the interstices of coarse aggregate,watering and compacting to the reqd. density ( with an initial lead of 5.0 km.) By Manual Means. Grading- II. Using Screening Type-B (11.2mm Agg.)

Prime coat (Providing and laying primer coat with bitumen emulsion on prepared surface of granular base including cleaning of road surface and spraying primer at the rate of 0.6 Kg/Sqm using mechanical means) (Including cost of testing of materials at site and Laboratory as directed by the Department).(i)With bitumen emulsion – CSS-1h.

Open – Graded Premix Surfacing (Providing, laying and rolling of open-graded premix surfacing of 20 mm thickness composed of 13.2 mm to 5.6 mm aggregates either using penetration grade bitumen to required line, grade and level to serve as wearing course on previously prepared base, including mixing in a suitable plant laying and rolling with a smooth wheeled roller 8 – 10 T capacity to the reqd. level and grade. (including carriage of mixed materials up to 10.00 KM initial lead from mixing plant) (including cost of testing of materials at site and Laboratory as directed by the Deptt) (A)Without anti stripping agent. (i)Mechanical method using penetration grade Bitumen (60/70 or VG -30) and HMP of appropriate capacity not less than 75 tonnes/hour.

Providing and laying tack coat with bitumen emulsion using emulsion pressure distributor at the rate of 0.20 Kg per Sqm on the prepared bituminous/granular surface cleaned with mechanical broom. (Including cost of testing of materials at site and Laboratory as directed by the Deptt.) (I)With Bitumen emulsion CSS-1h (a)Normal bituminous surface.

Seal Coat (Providing and laying seal coat sealing the voids in a bituminous surface laid to the specified levels, grade and cross fall using Type A and B seal coats) (Including cost of testing of materials at site or Laboratory as directed by the Deptt.) (A)Without anti stripping agent. Case -1 Type A (Providing and laying liquid seal coat comprising of a layer of bituminous binder (paving bitumen 60/70 or Vg-30 grade, followed by a cover of crushed stone chipping of specified grade).

WELSON MILLICK

SUDAM JOSHI