ABSTRACT

In tidal locations, creating new channels on approaches to quays and similar locations or within dock systems Backhoe dredger loading material onto two hopper barges with bottom dumping facility maximum water depth 15 m, distance to disposal site less than 20 miles approximate daily cost of backhoe dredger and two hopper barges £10,500; average production 100 m3/hr, 1,500 m3/day; locate, load, deposit and relocate - - - - m3 8.39

Item Gang Labour Plant Material Unit Total hours £ £ £ rate £

EXCAVATION BY DREDGING - cont'd

For general bed lowering or in maintaining shipping channels in rivers, estuaries or deltas Trailer suction hopper dredger excavating non-cohesive sands, grits or silts; hopper capacity 2000m3, capable of dredging to depths of 25 m with ability either to dump at disposal site or pump ashore for reclamation. Costs totally dependent on nature of material excavated and method of disposal. Approximate cost per tonne £2.50, which should be adjusted by the relative density of the material for conversion to m3

Locate, load, deposit and relocate - - - - t 2.52

Harbour bed control Maintenance dredging of this nature would in most cases be carried out by trailing suction hopper dredger as detailed above, at similar rates. The majority of the present generation of trailers have the ability to dump at sea or discharge ashore. Floating craft using diesel driven suction method with a 750 mm diameter flexible pipe for a maximum distance of up to 5000 m from point of suction to point of discharge using a booster (standing alone, the cutter suction craft should be able to pump up to 2000 m). Maximum height of lift 10 m. Average pumping capacity of silt/sand type materials containing maximum 30% volume of solids would be about 8,000 m3/day based on 24 hour working, Daily cost (hire basis) in the region of £20,000 including all floating equipmnet and discharge pipes, maintenance and all labour and plant to service but excluding mobilisation/initial set-up and demobilistaion costs (minimum £10,000). - - - - m3 3.25

For use in lakes, canals, rivers, industrial lagoons and from silted locations in dock systems Floating craft using diesel driven suction method with a 200 mm diameter flexible pipe maximum distance from point of suction to point of discharge 1500 m. Maximum dredge depth 5 m. Average pumping output 30 m3 per hour and approximate average costs (excluding mobilisation and demobilisation costs ranging between £3,000and £6,000 apiece) - - - - m3 6.04

Item Gang Labour Plant Material Unit Total hours £ £ £ rate £

EXCAVATION FOR CUTTINGS

The following unit costs are based on backacter and tractor loader machines Excavate topsoil maximum depth ne 0.25 m 0.03 0.95 1.40 - m3 2.34

Excavate material other than topsoil, rock or artificial hard material ne 0.25 m maximum depth 0.03 0.95 1.40 - m3 2.34 0.25 - 0.5 m maximum depth 0.03 0.95 1.40 - m3 2.34 0.5 - 1.0 m maximum depth 0.04 1.26 1.79 - m3 3.05 1.0 - 2.0 m maximum depth 0.06 1.89 2.72 - m3 4.61 2.0 - 5.0 m maximum depth 0.10 3.16 4.51 - m3 7.66 5.0 - 10.0 m maximum depth 0.20 6.31 9.10 - m3 15.41 10.0 - 15.0 m maximum depth 0.29 9.15 13.14 - m3 22.30

The following unit costs are based on backacter machines fitted with hydraulic breakers and tractor loader machines Excavate rock (medium hard) ne 0.25 m maximum depth 0.31 9.78 14.07 - m3 23.85 0.25 - 0.5 m maximum depth 0.43 13.57 19.51 - m3 33.08 0.5 - 1.0 m maximum depth 0.58 18.30 26.28 - m3 44.58 1.0 - 2.0 m maximum depth 0.80 25.25 36.35 - m3 61.59

Excavate unreinforced concrete exposed at the commencing surface ne 0.25 m maximum depth 0.57 17.99 25.89 - m3 43.88 0.25 - 0.5 m maximum depth 0.60 18.94 27.21 - m3 46.15 0.5 -1.0 m maximum depth 0.67 21.14 30.40 - m3 51.54 1.0 - 2.0 m maximum depth 0.70 22.09 31.72 - m3 53.81

Excavate reinforced concrete exposed at the commencing surface ne 0.25 m maximum depth 0.90 28.40 40.82 - m3 69.22 0.25 - 0.5 m maximum depth 0.90 28.40 40.82 - m3 69.22 0.5 - 1.0 m maximum depth 0.95 29.98 43.08 - m3 73.06 1.0 - 2.0 m maximum depth 1.08 34.08 48.98 - m3 83.07

Excavate unreinforced concrete not exposed at the commencing surface ne 0.25 m maximum depth 0.65 20.51 29.47 - m3 49.98 0.25 - 0.5 m maximum depth 0.67 21.14 30.40 - m3 51.54 0.5 -1.0 m maximum depth 0.69 21.78 31.33 - m3 53.11 1.0 - 2.0 m maximum depth 0.72 22.72 32.66 - m3 55.38

EXCAVATION FOR FOUNDATIONS

The following unit costs are based on the use of backacter machines Excavate topsoil maximum depth ne 0.25 m 0.03 0.92 1.40 - m3 2.31

Excavate material other than topsoil, rock or artificial hard material 0.25 - 0.5 m deep 0.05 1.53 2.29 - m3 3.82 0.5 - 1.0 m deep 0.06 1.84 2.72 - m3 4.56 1.0 - 2.0 m deep 0.07 2.14 3.15 - m3 5.29 2.0 - 5.0 m deep 0.12 3.67 5.44 - m3 9.11 5.0 - 10.0 m deep 0.23 7.03 10.46 - m3 17.49

Item Gang Labour Plant Material Unit Total hours £ £ £ rate £

EXCAVATION FOR FOUNDATIONS - cont'd

The following unit costs are based on backacter machines fitted with hydraulic breakers Excavate unreinforced concrete exposed at the commencing surface ne 0.25 m maximum depth 0.60 18.35 27.21 - m3 45.56 0.25 - 0.5 m maximum depth 0.66 20.18 29.93 - m3 50.11 0.5 - 1.0 m maximum depth 0.72 22.01 32.66 - m3 54.67 1.0 - 2.0 m maximum depth 0.80 24.46 36.35 - m3 60.81

Excavate reinforced concrete exposed at the commencing surface ne 0.25 m maximum depth 0.94 28.74 42.57 - m3 71.31 0.25 - 0.5 m maximum depth 0.98 29.96 44.51 - m3 74.48 0.5 - 1.0 m maximum depth 1.00 30.58 45.33 - m3 75.90 1.0 - 2.0 m maximum depth 1.04 31.80 47.23 - m3 79.03

Excavate tarmacadam exposed at the commencing surface ne 0.25 m maximum depth 0.30 9.17 13.61 - m3 22.78 0.25 - 0.5 m maximum depth 0.34 10.40 15.36 - m3 25.75 0.5 - 1.0 m maximum depth 0.37 11.31 16.75 - m3 28.07 1.0 - 2.0 m maximum depth 0.40 12.23 18.08 - m3 30.31

Excavate unreinforced concrete not exposed at the commencing surface ne 0.25 m maximum depth 0.70 21.40 31.68 - m3 53.09 0.25 - 0.5 m maximum depth 0.85 25.99 38.52 - m3 64.51 0.5 -1.0 m maximum depth 0.96 29.35 43.54 - m3 72.89 1.0 - 2.0 m maximum depth 1.02 31.19 46.26 - m3 77.45

GENERAL EXCAVATION

The following unit costs are based on backacter and tractor loader machines Excavate topsoil maximum depth ne 0.25 m 0.03 1.01 1.40 - m3 2.40

Excavate material other than topsoil, rock or artificial hard material ne 0.25 m maximum depth 0.03 1.01 1.38 - m3 2.38 0.25 - 0.5 m maximum depth 0.03 1.01 1.40 - m3 2.40 0.5 - 1.0 m maximum depth 0.04 1.34 1.79 - m3 3.13 1.0 - 2.0 m maximum depth 0.06 2.01 2.72 - m3 4.73 2.0 - 5.0 m maximum depth 0.10 3.36 4.51 - m3 7.86 5.0 - 10.0 m maximum depth 0.20 6.71 9.10 - m3 15.81 10.0 - 15.0 m maximum depth 0.29 9.73 13.14 - m3 22.88

The following unit costs are based on backacter machines fitted with hydraulic breakers and tractor loader machines Excavate rock (medium hard) ne 0.25 m maximum depth 0.31 10.40 14.07 - m3 24.47 0.25 - 0.5 m maximum depth 0.43 14.43 19.51 - m3 33.94 0.5 - 1.0 m maximum depth 0.58 19.46 26.28 - m3 45.74 1.0 - 2.0 m maximum depth 0.80 26.85 36.35 - m3 63.19

Excavate unreinforced concrete exposed at the commencing surface ne 0.25 m maximum depth 0.57 19.13 25.89 - m3 45.02 0.25 - 0.5 m maximum depth 0.60 20.13 27.21 - m3 47.35 0.5 -1.0 m maximum depth 0.67 22.48 30.40 - m3 52.88 1.0 - 2.0 m maximum depth 0.70 23.49 31.72 - m3 55.21

Item Gang Labour Plant Material Unit Total hours £ £ £ rate £

Excavate reinforced concrete exposed at the commencing surface ne 0.25 m maximum depth 0.90 30.20 40.82 - m3 71.02 0.25 - 0.5 m maximum depth 0.90 30.20 40.82 - m3 71.02 0.5 - 1.0 m maximum depth 0.95 31.88 43.08 - m3 74.96 1.0 - 2.0 m maximum depth 1.08 36.24 48.98 - m3 85.22

Excavate unreinforced concrete not exposed at the commencing surface ne 0.25 m maximum depth 0.65 21.81 29.47 - m3 51.28 0.25 - 0.5 m maximum depth 0.67 22.48 30.40 - m3 52.88 0.5 -1.0 m maximum depth 0.69 23.15 31.33 - m3 54.49 1.0 - 2.0 m maximum depth 0.72 24.16 32.66 - m3 56.82

EXCAVATION ANCILLARIES

The following unit costs are for various machines appropriate to the work Trimming topsoil; using D4H dozer horizontal 0.04 0.59 0.90 - m2 1.49 10 - 45° to horizontal 0.05 0.74 1.13 - m2 1.87

Trimming material other than topsoil, rock or artificial hard material; using D4H dozer, tractor loader or motor grader average rate horizontal 0.04 0.59 1.14 - m2 1.73 10 - 45° to horizontal 0.04 0.59 1.14 - m2 1.73 45 - 90° to horizontal 0.06 0.89 1.70 - m2 2.59

Trimming rock; using D6E dozer horizontal 0.08 1.18 26.16 - m2 27.34 10 - 45° to horizontal 0.80 11.80 26.16 - m2 37.97 45 - 90° to horizontal 1.06 15.64 34.67 - m2 50.31 vertical 1.06 15.64 34.67 - m2 50.31

Preparation of topsoil; using D4H dozer, tractor loader or motor grader average rate horizontal 0.06 0.89 1.59 - m2 2.48 10 - 45° to horizontal 0.06 0.89 1.59 - m2 2.48

Preparation of material other than rock or artificial hard material; using D6E dozer, tractor loader or motor grader average rate horizontal 0.06 0.89 1.91 - m2 2.79 10 - 45° to horizontal 0.06 0.89 1.91 - m2 2.79 45 - 90° to horizontal 0.06 0.89 1.91 - m2 2.79

Preparation of rock; using D6E dozer horizontal 0.80 11.80 26.16 - m2 37.97 10 - 45° to horizontal 0.60 8.85 19.62 - m2 28.48 45 - 90° to horizontal 0.60 8.85 19.62 - m2 28.48

The following unit costs for disposal are based on using a 22.5 t ADT for site work and 20 t tipper for off-site work. The distances used in the calculation are quoted to assist estimating, although this goes beyond the specific requirements of CESMM3 Disposal of excavated topsoil storage on site; 100 m maximum distance 0.05 0.90 3.37 - m3 4.27 removal; 5 km distance 0.11 1.99 6.00 - m3 7.98 removal; 15 km distance 0.21 3.79 11.45 - m3 15.24

Disposal of excavated earth other than rock or artificial hard material

Item Gang Labour Plant Material Unit Total hours £ £ £ rate £

EXCAVATION ANCILLARIES - cont'd

The following unit costs for disposal are based on using a 22.5 t ADT for site work and 20 t tipper for off-site work. The distances used in the calculation are quoted to assist estimating, although this goes beyond the specific requirements of CESMM3 - cont'd storage on site; 100 m maximum distance; using 22.5 t ADT 0.05 0.90 3.37 - m3 4.27 removal; 5 km distance; using 20 t tipper 0.12 2.17 6.54 - m3 8.71 removal; 15 km distance; using 20 t tipper 0.22 3.97 11.99 - m3 15.97

Disposal of excavated rock or artificial hard material storage on site; 100 m maximum distance; using 22.5 t ADT 0.06 1.08 4.04 - m3 5.13 removal; 5 km distance; using 20 t tipper 0.13 2.35 7.09 - m3 9.43 removal; 15 km distance; using 20 t tipper 0.23 4.15 12.54 - m3 16.69

Add to the above rates where tipping charges apply: non-hazardous waste - - - - m3 29.62 hazardous waste - - - - m3 74.25 special waste - - - - m3 90.75 contaminated liquid - - - - m3 94.88 contaminated sludge - - - - m3 123.75

Add to the above rates where Landfill Tax applies: exempted material - - - - m3 - inactive or inert material - - - - m3 3.75 other material - - - - m3 48.00

The following unit costs for double handling are based on using a 1.5 m3 tractor loader and 22.5 t ADT. A range of distances is listed to assist in estimating, although this goes beyond the specific requirements of CESMM3. Double handling of excavated topsoil; using 1.5 m3

tractor loader and 22.5 t ADT 300 m average distance moved 0.08 1.44 5.13 - m3 6.57 600 m average distance moved 0.10 1.80 6.41 - m3 8.22 1000 m average distance moved 0.12 2.17 7.70 - m3 9.86

Double handling of excavated earth other than rock or artificial hard material; using 1.5 m3 tractor loader and 22.5 t ADT 300 m average distance moved 0.08 1.44 5.13 - m3 6.57 600 m average distance moved 0.10 1.80 6.41 - m3 8.22 1000 m average distance moved 0.12 2.17 7.70 - m3 9.86

Double handling of rock or artificial hard material; using 1.5 m3 tractor loader and 22.5 t ADT 300 m average distance moved 0.16 2.89 10.26 - m3 13.15 600 m average distance moved 0.18 3.25 11.54 - m3 14.79 1000 m average distance moved 0.20 3.61 12.83 - m3 16.44

The following unit rates for excavation below Final Surface are based on using a 16 t backacter machine Excavation of material below the Final Surface and replacement of with: granular fill 1.20 17.18 23.99 25.76 m3 66.93 concrete Grade C7.5P 0.60 8.59 12.00 95.60 m3 116.19

Item Gang Labour Plant Material Unit Total hours £ £ £ rate £

Misc Timber supports left in 0.32 6.03 - 7.59 m2 13.62 Metal supports left in 0.89 16.40 - 36.76 m2 53.17

FILLING

Excavated topsoil; DfT specified type 5A Filling to structures 0.07 2.82 5.95 - m3 8.77 embankments 0.03 0.99 2.08 - m3 3.07 general 0.02 0.83 1.75 - m3 2.58 150 mm thick 0.01 0.28 0.58 - m2 0.86 250 mm thick 0.01 0.47 1.00 - m2 1.47 400 mm thick 0.02 0.67 1.41 - m2 2.08 600 mm thick 0.02 0.95 2.00 - m2 2.94

Imported topsoil DfT specified type 5B; Filling embankments 0.03 0.99 2.08 24.59 m3 27.66 general 0.02 0.83 1.75 24.59 m3 27.17 150 mm thick 0.01 0.28 0.58 3.69 m2 4.55 250 mm thick 0.01 0.47 1.00 6.15 m2 7.62 400 mm thick 0.02 0.67 1.41 9.84 m2 11.92 600 mm thick 0.02 0.95 2.00 14.76 m2 17.70

Non-selected excavated material other than topsoil or rock Filling to structures 0.04 1.42 2.99 - m3 4.42 embankments 0.02 0.59 1.25 - m3 1.84 general 0.01 0.43 0.91 - m3 1.35 150 mm thick - 0.16 0.33 - m2 0.49 250 mm thick 0.01 0.24 0.50 - m2 0.74 400 mm thick 0.01 0.36 0.75 - m2 1.10 600 mm thick 0.01 0.47 1.00 - m2 1.47

Selected excavated material other than topsoil or rock Filling to structures 0.04 1.62 3.41 - m3 5.03 embankments 0.01 0.55 1.16 - m3 1.72 general 0.01 0.47 1.00 - m3 1.47 150 mm thick - 0.16 0.33 - m2 0.49 250 mm thick 0.01 0.28 0.58 - m2 0.86 400 mm thick 0.01 0.39 0.83 - m2 1.23 600 mm thick 0.01 0.51 1.08 - m2 1.59

Imported natural material other than topsoil or rock; subsoil Filling to structures 0.04 1.42 2.99 24.56 m3 28.97 embankments 0.02 0.59 1.25 24.56 m3 26.40 general 0.02 0.59 1.25 24.56 m3 26.40 150 mm thick 0.01 0.36 0.75 3.68 m2 4.79 250 mm thick 0.01 0.51 1.08 6.14 m2 7.73 400 mm thick 0.02 0.59 1.25 9.82 m2 11.66 600 mm thick 0.02 0.67 1.41 14.73 m2 16.82

Item Gang Labour Plant Material Unit Total hours £ £ £ rate £

FILLING - cont'd

Imported natural material other than topsoil or rock; granular graded material Filling to structures 0.04 1.42 2.99 28.14 m3 32.56 embankments 0.02 0.67 1.41 28.14 m3 30.23 general 0.02 0.67 1.41 28.14 m3 30.23 150 mm thick 0.01 0.47 1.00 4.22 m2 5.69 250 mm thick 0.02 0.67 1.41 7.04 m2 9.12 400 mm thick 0.02 0.79 1.66 11.26 m2 13.71 600 mm thick 0.02 0.87 1.83 16.89 m2 19.58

Imported natural material other than topsoil or rock; granular selected material Filling to structures 0.04 1.42 2.99 23.88 m3 28.29 embankments 0.02 0.67 1.41 23.88 m3 25.96 general 0.02 0.67 1.41 23.88 m3 25.96 150 mm thick 0.01 0.47 1.00 3.58 m2 5.05 250 mm thick 0.02 0.67 1.41 5.97 m2 8.05 400 mm thick 0.02 0.79 1.66 9.55 m2 12.00 600 mm thick 0.02 0.87 1.83 14.33 m2 17.02

Excavated rock Filling to structures 0.04 1.58 3.33 - m3 4.91 embankments 0.05 1.97 4.16 - m3 6.13 general 0.05 1.97 4.16 - m3 6.13 150 mm thick 0.02 0.67 1.41 - m2 2.08 250 mm thick 0.03 1.03 2.16 - m2 3.19 400 mm thick 0.04 1.58 3.33 - m2 4.91 600 mm thick 0.06 2.17 4.57 - m2 6.75

Imported rock Filling to structures 0.04 1.58 3.33 49.84 m3 54.74 embankments 0.02 0.95 2.00 49.84 m3 52.78 general 0.02 0.79 1.66 49.84 m3 52.29 150 mm thick 0.01 0.47 1.00 7.47 m2 8.95 250 mm thick 0.02 0.79 1.66 12.46 m2 14.91 400 mm thick 0.03 1.18 2.50 19.93 m2 23.61 600 mm thick 0.03 1.18 2.50 29.90 m2 33.58

Item Gang Labour Plant Material Unit Total hours £ £ £ rate £

FILLING ANCILLARIES

Trimming of filled surfaces Topsoil horizontal 0.02 0.38 1.34 - m2 1.72 inclined at an angle of 10 - 45° to horizontal 0.02 0.38 1.34 - m2 1.72 inclined at an angle of 45 - 90° to horizontal 0.03 0.49 1.72 - m2 2.21

Material other than topsoil, rock or artificial hard material horizontal 0.02 0.38 1.34 - m2 1.72 inclined at an angle of 10 - 45° to horizontal 0.02 0.38 1.34 - m2 1.72 inclined at an angle of 45 - 90° to horizontal 0.03 0.49 1.72 - m2 2.21

Rock horizontal 0.51 9.22 32.51 - m2 41.73 inclined at an angle of 10 - 45° to horizontal 0.52 9.40 33.15 - m2 42.55 inclined at an angle of 45 - 90° to horizontal 0.70 12.66 44.62 - m2 57.28

Preparation of filled surfaces Topsoil horizontal 0.03 0.54 1.91 - m2 2.45 inclined at an angle of 10 - 45° to horizontal 0.03 0.54 1.91 - m2 2.45 inclined at an angle of 45 - 90° to horizontal 0.04 0.67 2.36 - m2 3.03

Material other than topsoil, rock or artificial hard material horizontal 0.03 0.54 1.91 - m2 2.45 inclined at an angle of 10 - 45° to horizontal 0.03 0.54 1.91 - m2 2.45 inclined at an angle of 45 - 90° to horizontal 0.04 0.67 2.36 - m2 3.03

Rock horizontal 0.33 5.96 21.04 - m2 26.99 inclined at an angle of 10 - 45° to horizontal 0.33 5.96 21.04 - m2 26.99 inclined at an angle of 45 - 90° to horizontal 0.52 9.39 33.15 - m2 42.53

GEOTEXTILES

Notes The geotextile products mentioned below are not specifically confined to the individual uses stated but are examples of one of many scenarios to which they may be applied. Conversely, the scenarios are not limited to the geotextile used as an example.