Short Term Maintenance Contract (STMC) on NH-10 for the section from km 53 Rangpo to Km 64 Singtam Bridge under the jurisdiction of PMU-Ranipool, NHIDCL on Percentage Rate Contract Basis for FY 2026-27 in the state of Sikkim

VEGETATION CLEARANCE

Clearing road side vegetation (brush wood mooli bamboos, overgrown grass including removal etc. along existing road side, and disposal of the cut bushes down hill side of the road formation. This jungle clearance should include minimum height of clearance of 4.5m from top of pavement on uphill side of the road including road shoulder and all the bushes on the shoulder and down hillside of the road C.) MDRs, SHs, NHs, etc

DRAIN CLEARANCE

Hill side Drain Clearance (Removal of earth from the choked hill side drain and disposing it on the valley side manually)

Mazdoor Considering 5 Labours per Day during Monsoon i.e., in the month of May, June, July & August in the year 2025-26 for clearance of Choked Drains, Channelising Storm Water and other Ancillary Works. Considering 3 Labours during Dry Season in the month of March, April, September, October, November & December in the year 2025 and January, February in the year 2026 for keeping the carriageway dust free, clearance of Choked Drains and other Ancillary Work.

LANDSLIDE CLEARANCE Providing and supplying followings equipments including driver, labour, loading/unloading arrangements, fuel lubricants and attachment for maintenance work when required as per the instruction of the Engineer.

Hydraulic Excavator of 1 Cum bucket and rock breaker attachment

Front End Loader 1 Cum bucket Capacity

Tipper-5Cum

GABIAN WORKS (Length = 380m ; Height = 5m)

Excavation in Soil by Manual Means (Excavation for roadway in soil using manual means including loading in truck for carrying of cut earth to designated dumping yard).

Gabian Structure for Retaining earth (Providing and constrcution of a gabian structure for retaining earth with segments of wire crates of size 7mX3mX0.6m each divided into 1.5m compartments by cross netting, made from 4mm galvanised steel wire @32kg per 10sqm having minimum tensile strength of 300 Mpa conforming to IS:280 and galvinising caoting conforming to IS:4826, woven into mesh with double twist, mesh size not exceeding 100X100mm filled with boulders with least dimension of 200mm, all loose ends to be tied with 4mm galvanised steel wire.

Supply and installation of non woven Geotextile having 250 gsm over the slope to be treated including all cost of labour, material and T&P requirred for proper completion work

Back filling behind abutment, wing wall and return wall complete as per drawing and Technical specification (a) Granular material

Plum Wall (Length = 115m ; Height = 5m)

Excavation in Soil by Manual Means (Excavation for roadway in soil using manual means including loading in truck for carrying of cut earth to designated dumping yard).

Plain/Reinforced cement concrete in open foundation complete as per drawing and technical specifications, placed in foundation and compacted by vibration including curing for 14 days.. I. PCC grade M15 Nominal mix 1 : 2 : 4

Providing & laying Plum concrete in 1:1.5:3 c.c. (1cement, 1.5coarse sand, 3clean hard graded stone chips of 20 mm down nominal gauge) with 50% clean hard stone of sizes not exceeding 15cm including shuttering, compacting and curing complete.

Providing weep holes in brick masonry/plain /reinforced concrete abutment, wing wall/return wall with 100 mm dia AC pipe, extending through the full width of the structure with slope of 1V :20H towards drawing foce. Complete as per drawing and Technical specifications

Back filling behind abutment, wing wall and return wall complete as per drawing and Technical specification (a) Granular material

Beautification Works

Painting on concrete surface (Providing and applying 2 coats of water based cement paint to unplastered concrete surface after cleaning the surface of dirt, dust, oil, grease, efflorescence and applying paint @ of 1 litre for 2 Sq.m. )

Other Road Appurtenances

Road Delineators (Supplying and installation of delineators (road way indicators, hazard markers, object markers), 80- 100 cm high above ground level, painted black and white in 15 cm wide stripes, fitted with 80 x 100 mm rectangular or 75 mm dia circular reflectorised panels at the top, buried or pressed into the ground and confirming toIRC-79 and the drawings.)

Road Markers/Road Stud with Lense Reflector (Providing and fixing of road stud 100x 100 mm, die cast in aluminium, resistant to corrosive effect of salt and grit, fitted with lense reflectors, installed in concrete or asphaltic surface by drilling hole 30 mm upto a depth of 60 mm and bedded in a suitable bituminous grout or epoxy mortar, all as per BS 873 part 4:1973)

Metal Beam Crash Barrier Type - B, "THRIE" : Metal Beam Crash Barrier (Providing and erecting a "Thrie" metal beam crash barrier comprising of 3 mm thick orrugated sheet metal beam rail, 85 cm above road/ground level, fixed on ISMC series channel vertical post, 150 x 75 x 5 mm spaced 2 m centre to centre, 2 m high with 1.15 m below ground level, all steel parts and fitments to be galvanised by hot dip process, all fittings to conform to IS:1367 and IS:1364, metal beam rail to be fixed on the vertical post with a space of channel section 150 x 75 x 5 mm, 546 mm long complete as per clause 810)

Replacement of crash barrier.

Retro- reflectorised Traffic signs (Providing and fixing of retro- reflectorised cautionary, mandatory and informatory sign as per IRC :67 made of encapsulated lens type reflective sheeting vide clause 801.3, fixed over aluminium sheeting, 1.5 mm thick supported on a mild steel angle iron post 75 mm x 75 mm x 6 mm firmly fixed to the ground by means of properly designed foundation with M15 grade cement concrete 45 cm x 45 cm x 60 cm, 60 cm below ground level as per approved drawing)

(ii) 60 cm equilateral triangle

(iii) 60 cm circular

Direction and Place Identification signs with size more than 0.9 sqm size board. (Providing and erecting direction and place identification retro- reflectorised sign asper IRC :67 made of encapsulated lens type reflective sheeting vide clause 801.3, fixed over aluminium sheeting, 2 mm thick with area exceeding 0.9 sqm supported on a mild steel angle iron post 75 mm x 75 mm x 6 mm, 2 Nos. firmly fixed to the ground by means of properly designed foundation with M 15 grade cement concrete45 cm x 45 cm x 60 cm, 60 cm below ground level as per approved drawing)

Road Marking with Hot Applied Thermoplastic Compound with Reflectorising Glass Beads on Bituminous Surface (Providing and laying of hot applied thermoplastic compound 2.5 mm thick including reflectorising glass beads @ 250 gms per sqm area, thickness of 2.5 mm is exclusive of surface applied glass beads as per IRC:35 .The finished surface to be level, uniform and free from streaks and holes.)

Pot-Patch Repair Works

Dismantling of Flexible Pavements (Dismantling of flexible pavements and disposal of dismantled materials up to designated dumping yard stacking serviceable and unserviceable materials separately) II. By Mechanical Means A. Bituminous Course

Wet Mix Macadam (Providing, laying, spreading and compacting graded stone aggregates wet mix macadam specification including premixing the material with water at OMC in mechanical mix plant carriage of mixed material by tipper to site, laying in uniform layers with paver in sub base/ base course on well prepared surfaceand compacting with vibratory roller to achieve the desired density).

Prime coat (Providing and applying primer coat with bitumen emulsion on prepared surface of granular Base including clearing of road surface and spraying primer at the rate shown in 500-1 using mechanical means.) ii) Medium Porosity

Tack Coat (Providing and applying tack coat with Bitumen emulsion (RS-1) using emulsion distributor at the rate of 0.25 to 0.30 kg per sqm on the prepared Normal Bituminous Surface with primer and cleaned with Hydraulic broom as per Technical Specification Clause 503. (Normal Bituminous Surface)

Normal Bituminous Surface

Granular Surface Treated with Primer

Dense Graded Bituminous Macadam (Providing and laying dense bituminous macadam with 100-120 TPH batch type HMP producing an average output of 75 tonnes per hour using crushed aggregates of specified grading, premixed with bituminous binder @ 4.0 to 4.5% by weight of total mix of mix and filler, transporting the hot mix to work site, laying with a hydrostatic paver finisher with sensor control to the required grade, level and alignment, rolling with smooth wheeled, vibratory and tandem rollers to achieve the desired compaction as per MoRTH specification clause No. 507 complete in all respects.) i) for Grading II ( 19 mm nominal size )

Bituminous Concrete (Providing and laying bituminous concrete with 100-120 TPH batch type hot mix plant producing an average output of 75 tonnes per hour using crushed aggregates of specified grading, premixed with bituminous binder @ 5.4 to 5.6 % of mix and filler, transporting the hot mix to work site, laying with a hydrostatic paver finisher with sensor control to the required grade, level and alignment, rolling with smooth wheeled, vibratory and tandem rollers to achieve the desired compaction as per MORTH specification clause No. 509 complete in all respects) Case-I Grading-I ( 13 mm nominal size )

Filling Pot - holes and Patch Repairs with Bitumenious 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 5.3, back filling 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) (i). for grading I Material (13 mm nominal size)

Providing and constructing temporary restoration work with form of a palasiding with empty bags filled with approved quality earth/sand/moorum/gravel wetc. Including stitching the bags with jute string and placing the filled bags in popuslope to withstand the road structure temporarily from sliding down

Providing and Laying of Interlocking Concrete Block Pavements. Supplying and Laying in the particular pattern of cement concrete block pavements with BIS certification and spacer nib of size and shape with aspect ratio as per IS 15658 with cement concrete grade not less than M40 on the prepared base course of specified CBR as mentioned in design and drawing with a cushion of bedding sand of 30 to 50 mm thick (grading of the bedding sand as per clause 6.5.1 of IRC SP-63) and filling up the gaps between two paver block with joint filling sand (the grading of the joint filling sand will be as per clause 6.5.2) complete as per IRC SP - 63 with proper confinement of bedding and joint filling sand, compaction,levelling and filling up of the edge gaps with mortar. Type III should be as per design requeirment or instruction of E-I-C. Type-III (80 mm thickness) interlocking system

Pre-cast Cover Drain

Excavation for Structures Earthwork in excavation of foundation of structures as per drawing and technical specification, including setting out, construction of shoring and bracing, removal of stumps and other deleterious matter, dressing of sides and bottom, backfilling the exacavtion earth to the extent required and utilising the remaining earth locally for road work. Ordinary Soil by Mechanical Means (Depth upto 3m)

Plain/Reinforced cement concrete in open foundation as per drawing and technical specifications PCC Grade M15

Plain/Reinforced cement concrete in open foundation as per drawing and technical specifications RCC Grade M25 Case I: Using Conrete Mixture

Supplying, fitting and placing un-coated HYSD bar reinforcement as per drawing and technical specifications.

Back filling behind side wall complete as per drawing and technical specification A Granular material

Supply, fabrication and fitting of Steel Grating with Bottom Frame and removable top part of size 10000x700mm Bottom Frame width 65x65x6mm (Angle Section) Top part with 100x50x6mm (C Channel Section) Section with joining part of 50x50x6mm (Angle Section)

River Training & Protection works

Providing, transporting & Launching/placing of Pre-cast Inter-locking Tetrapods in the riverbank for erosion control. Tetrapod weighing 5.0 MT as per drawing with M35 grade of controlled cement concrete mix with well graded stone chips ( 20 mm nominal size ) using concrete mixer, necessary shuttering, reinforcement and cost of quality control, sampling, testing of concrete cubes, vibrating, curing etc. complete as per technical specification, conforming to IS 456 and relevant special publications, submission of job mix formula after preliminary mix design and testing of concrete cubes as per direction of Engineer-In-Charge complete.

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