NHIDCL/RO-Agt/T/OR/2020/322/2

Amount

Surface Drains in Ordinary Soil Construction of unlined surface drains of average cross-sectional area 0.4 sqm in ordinary soil to specified lines, grades, levels and dimensions as per MoRT&H Technical Specification clauses of section 300. Excavated material to be used in embankment with a lift upto 3 m and lead of 50 m (average lead 25 m).

Water Bound macadam Sub-Base/Base (Grade-III) Providing, laying, spreading and compacting stoner aggregrate of specific sizes to water bound macadam specification including spreading in uniform thickness, hand picking, rolling with three wheel 80-100 KN static roller / vibratory roller in stages to proper grade and camber, apllying and brooming, stone screening and binding materials to fill up the interstices of course aggregate, watering and compacting to the required density as per MoRT&H Technical Specification Clause 404.

Prime coat Providing and applying primer coat with bitumen emulsion (SS-1) 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 as per MoRT&H Technical Specification Clause 502.

Tack Coat Providing and applying tack coat with bitumen emulsion (RS-1) using emulsion pressure distributor at the rate of 0.20 kg per sqm on the prepared bituminous / granular surface cleaned with Hydraulic broom as per MoRT&H Technical Specification Clause 503.

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 or cut-back or emulsion to required to required line, grade and level to serve as wearing course on a previously prepared base, including mixing in a suitable plant, laying and rolling with a smooth wheeled roller 8-10 tonne capacity, finished to required level and grades as per MoRT&H Technical Specification Clause 511.

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 seal coats as per MoRT&H Technical Specifiication Clause 513. Case -II: Type B

Land Slide Clearance in Soil Clearance of land slides in soil and ordinary rock by bull-dozer D80 A-12 180 HP and disposal of the same on the valley side as per MoRT&H Technical Specification Clause 3005.2

Providing and placing gunny/ polythene ( of minimum wall thickness of 500 micron) bags filled with sand ( of minimum qty of 0.034 cum) and properly manually stitched to avoid any leakage of sand as per specification.

MARAN CHANDRA DAS

DYUTIMOY DATTA

BHANU BHUSAN DEB

Sujit Pal