DAM & ALLIED WORKS

Chapter - I
DAM AND ALLIED WORKS - Standard Data

(WLL BE WITH E-N-C & TO INCORPORATE CHANGES YEARLY/ AS NEEDED)
FOR THE YEAR :2019-20

DAM AND ALLIED WORKS - DATA RATES
Directions to add Seigniorage Charges and Additional Lead Charges

Seigniorage Charges:
1. The unit rate for work item in the Standard Data is exclusive of Seigniorage Charges wherever applicable.
2. The appropriate Seigniorage Charges for relevant materials are to be added in the Part-B of the estimate
Additional Lead and Lift Charges:
1. Unless otherwise specified the basic rates are inclusive of all lifts.
2. For concrete, masonry and reinforcement items wherever initial lead of 1km is considered in the basic rate, the additional lead charges are to be added as follows:
Additional lead charges for  Steel, sand, coarse aggregate, stones and stone chips shall be worked out for total lead involved and 1 km lead charges included in basic rate shall be deducted from total lead charges. No loading and unloading charges shall be allowed for any item.
In case of Cement and Steel, Loading and unloading charges are already added in the work item while arriving the unit rate and hence should not be added again
Example:

3. The Leads for Steel shall be from the nearest market place to the Project area.
4. For earth/rockfill embankments wherever initial lead of 1km is considered in the basic rate, the additional lead charges are to be added as follows: Additional lead charges for Earth, Murrum etc., shall be worked out for total lead involved and 1 km lead charges included in basic rate shall be deducted from total lead charges. No loading and unloading charges shall be allowed for any item. (same as above)
Example:

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT
                                                                     880 cum

B. MACHINERY: 

 C. LABOUR:

IRR-DAW-1-2

Excavation for foundation in ordinary rock (including HDR) without blasting including boulders above 0.3 m upto 0.6 m dia for dam, spillway, intake structure and other appurtenant works and placing the excavated material neatly in dump area or disposing off the same as directed etc., complete with initial lead upto 1 km and all lifts.

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                     520 cum

 B. MACHINERY: 

C. LABOUR:

IRR-DAW-1-3

Excavation for foundation in hard rock (including F&F rock) requiring blasting including boulders above 0.6 m upto 1.2 m dia. for dam, spillway, intake structure and other appurtenant works and placing the excavated material neatly in dump area or disposing off the same as directed etc., complete with initial lead upto 1 km and all lifts.

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                     520 cum

B. MACHINERY:

C. LABOUR:

IRR-DAW-1-3A

New Item 2015-16-1

Excavation for foundation in hard rock (including F&F rock) including boulders above 0.6 m upto 1.2 m dia. by controlled blasting and controlling fly rock by muffling arrangements for dam, spillway, intake structure and other appurtenant works and other open foundation works and placing the excavated material neatly in dump area or disposing off the same as directed etc., complete with initial lead upto 1 km and all leads.

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                     520 cum

 B. MACHINERY:

C. LABOUR:

IRR-DAW-1-4 (a)

Excavation for foundation in hard rock of all toughness by blasting including boulders above 1.2 m dia. for dam, spillway, intake structure and other appurtenant works and placing the excavated rock neatly in dump area or stack yard including levelling as directed etc., complete with initial lead upto 1 km and all lifts.

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                     320 cum

IRR-DAW-1-5 (b) 

Excavation for foundation in hard rock of all toughness including boulders above 1.2 m dia. by controlled blasting method and controlling fly-rock by muffling arrangements for dam, spillway, intake structure and other appurtenant structures etc., including placing and levelling the excavated rock neatly in dump area or other place as directed etc., complete with lead upto upto 1 km and all lifts.

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                     480 cum

IRR-DAW-1-6 (c)

Excavation for foundation in hard rock of all toughness including boulders above 1.2 m dia. by line drilling and smooth blasting and controlling fly-rock by muffling arrangements for dam, spillway, intake structure and other appurtenant structures etc., including dressing sides and bed to  required level / profile, placing and levelling the excavated rock neatly in  dump area or other place as directed etc., complete with lead upto 1 km and all lifts.

Note : 

i ) 1 m width of excavation along the face to be dressed shall be treated as excavation by line drilling and smooth blasting.
ii) The rate includes controlling fly-rock wherever required.
iii) The rate under this item shall be paid only on ascertaining that the surface requiring dressing has come off neatly as per specifications or atleast 50 percent of smooth blast holes are visible for inspection and are spaced at specified interval.
iv) In case, where the above criteria is not fulfilled payment shall be restricted to the rate provided for excavation by normal or controlled blasting as the case may be.

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                   40.00 cum

IRR-DAW-1-7

Preparing foundation bed for masonry or concrete by benching, stepping, removing all loose material by wedging / chiselling and disposing off the same as directed and cleaning the surface with air and water jet etc., complete with initial lead upto 50 m and all lifts. 

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                100.00 sqm

IRR-DAW-1-8

Preparing foundation bed for cut-off trench filling in rock portion by removing all loose materials by wedging / chiselling and disposing off the same as directed etc., complete with initial lead upto 50 m and all lifts.

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                100.00 sqm

IRR-DAW-1-9

Drilling 45 to 50 mm dia holes vertical or inclined upto 10 degrees to vertical in rock /masonry/ concrete by percussion drilling using waggon drill or any other suitable equipment including cost of all materials, machinery, labour, redrilling through partially set grout wherever required etc., complete. for drilling upto 6 m depth from surface.

NOTE: 

The item rate for drilling through rock / masonry / concrete includes redrilling through partially set grout, if any, in the portion of hole already grouted.

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                   96.00 Rm

IRR-DAW-1-10

Flushing grout holes of all sizes with water and air jets alternatively for an average period of 30 minutes including water intake observations after flushing, cost of all materials, machinery, labour etc., complete. 

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                   192.00 Rm

 IRR-DAW-1-11 (a)

Consolidation grouting with neat cement grout mix of suitable consistency under specified pressure as directed in drilled holes by stage grouting method including cost of all materials, machinery, labour, redrilling if necessary etc.,complete with initial lead upto 1 km and all lifts.

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                  1.05 tonne

IRR-DAW-1-12 (b)              

Curtain grouting with neat cement grout mix of suitable consistency under specified pressure as directed in drilled holes by stage grouting method including cost of all materials, machinery, labour, redrilling if necessary etc., complete with initial lead upto 1 km and all lifts.  

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                  1.05 tonne

IRR-DAW-1-13 

Providing and fixing 25 mm dia 3 m long cold twisted deformed steel dowel bars with one end driven into 45 to 50 mm diameter 1.50 m deep  hole drilled in bed rock and other end provided with L-bend for embedding in concrete /masonry of over flow / non-over flow blocks and other appertenant works including cost of drilling and cleaning hole, filling hole with cement mortar 1:1 proportion, driving anchor rod, cost of all materials, machinery, labour etc., complete with initial lead upto 1 km and all lifts. Consider 25 anchor rods for analysis.

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                       25 Nos

 IRR-DAW-1-14

Providing and fixing 25 mm dia. 2.75 m long ribbed steel anchor rods with one end split and driven firmly using steel wedge into 1.25 m deep 45 to 50 mm dia. hole drilled in bed rock and other end provided with L- bend for embedding in concrete / masonry for spillway and appurtenant works including drilling and cleaning hole, filling hole with thick cement slurry, driving anchor rod, cost of all materials, machinery, labour, steel wedge etc., complete with initial lead upto 1 km and all lifts. Consider 25 anchor rods for analysis.

 

IRR-DAW-2 :  REINFORCEMENT & CEMENT CONCRETE WORKS :

RR-DAW-2-1A

Providing, fabricating and placing in position reinforcement steel for RCC,below 36 dia rods overlaps and wastages wherever required, tying with 1.25 mm diameter soft annealed steel wire, including cost of all materials, machinery, labour etc., complete with initial lead upto 1 km and all lifts. overlaps and wastage as per NHAI-data Lap jointing considered for bars upto 36 mm diameter.

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                      1 Tonne

 IRR-DAW-2-1B

Providing, fabricating and placing in position reinforcement steel for RCC above 36 dia with welding and wastage at 2.5%, tying with 1.25 mm diameter soft annealed steel wire, including cost of all materials, machinery, labour etc., complete with initial lead upto 1 km and all lifts. overlaps and wastage as per NHAI-data welding  joints considered for bars above 36 mm diameter.

IRR-DAW-2-2 

Providing and laying insitu vibrated M-15 ( 28 days cube compressive strength not less than 15 N / sq mm ) grade cement concrete using 80 mm down size approved, clean, hard, graded aggregates including cost of all materials, machinery, labour, formwork, centering, scaffolding, cleaning, batching, mixing, placing in position, levelling, vibrating, finishing, curing etc.,complete for plain concrete works with initial lead upto 1 km and all lifts. ( Cement content : 250 kg /cum with use of super plasticiser equal to 0.4% of cement content , CA : 0.98 cum, Blending Ratio of CA -- 40:30:20:10, FA : 0.35 cum )

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                     240 Cum

 IRR-DAW-2-2A : New Item1-2010-11

Providing and laying insitu vibrated M-20 ( 28 days cube compressive strength not less than 20 N / sq mm ) grade cement concrete using 80 mm down size approved, clean, hard, graded aggregates including cost of all materials, machinery, labour, formwork, centering, scaffolding, cleaning, batching, mixing, placing in position, levelling, vibrating, finishing, curing etc.,complete for plain concrete works with initial lead upto 1 km and all lifts. ( Cement content : 300 kg /cum with use of 0.4% of cement content super plasticiser , CA : 0.90 cum, Blending Ratio of CA -- 40:30:20:10, FA : 0.40 cum )

DATA:                       RATE ANALYSIS
A. MATERIALS:                                               UNIT:
                                                                     240 Cum