31 Earthwork (cont.)
Clear medium brush and small trees, grub roots Using a 130 HP D-6 dozer (420 CY) C2@41.8 Acre — 2,030.00 2,360.00 4,390.00
Clear brush and trees to 6" trunk diameter Using a 335 HP D-8 dozer (455 CY) C2@45.2 Acre — 2,200.00 2,550.00 4,750.00
Clear wooded area, pull stumps Using a 460 HP D-9 dozer (490 CY) C2@48.7 Acre — 2,370.00 4,260.00 6,630.00
Strip, stockpile on site and then replace topsoil Using a 100 HP D-4 tractor S1@.069 CY — 3.34 2.34 5.68
Building Layout Typical cost for a survey crew to lay out site improvements for a 100,000 SF single-story commercial building and associated walks, drainage and parking. Includes preparation of a project control map, setting benchmarks, marking site disturbance limits at 50' intervals, aligning roadways and parking areas and setting lath or stakes as required for rough grading. Based on ten visits to the site by the survey crew.
  Initial boundary control survey — LS — — — 1,040.00
  Site rough grading, set lath — LS — — — 1,500.00
  Sanitary sewer, alignment and grade — LS — — — 720.00
  Storm drainage, alignment and grade — LS — — — 2,250.00
  Water main, hydrants, alignment and grade — LS — — — 2,250.00
  Curb, set stakes at 25' stations (3 visits) — LS — — — 4,170.00
  Building corners, location and grade — LS — — — 1,150.00
  Run-off detention pond, position and grade — LS — — — 900.00
  Retaining walls, alignment and grade — LS — — — 1,050.00
  Walkways, alignment and grade — LS — — — 1,020.00
  Light pole bases, location and grade — LS — — — 750.00
  Building I.D. sign, location and grade — LS — — — 350.00
Rock Excavation Rock drilling costs. Based on using a pneumatic truck-mounted wagon drill. Equipment includes one wheel-mounted air compressor and one 4-1/2" pneumatic wagon drill with hydraulic swing boom and drill bits. Costs shown are per linear foot of hole drilled. Add blasting costs below. Use $2,500 as a minimum job charge. LF per hour shown is for a 2-man crew.
    Easy work, 38 LF per hour S1@.052 LF — 2.51 2.95 5.46
    Moderate work, 30 LF per hour S1@.067 LF — 3.24 3.80 7.04
    Most work, 25 LF per hour S1@.080 LF — 3.87 4.53 8.40
    Hard work, 20 LF per hour S1@.100 LF — 4.84 5.67 10.51
    Dense rock, 15 LF per hour S1@.132 LF — 6.38 7.48 13.86
    Drilling 2-1/2" hole for rock bolts, 24 LF/hour S1@.086 LF — 4.16 4.87 9.03
Blasting costs Based on two cycles per hour and 20 linear foot lifts. These costs assume 75% fill of holes with explosives. Equipment includes one flatbed truck. Costs shown are per cubic yard of area blasted. Loading or hauling of blasted material not included. Use $3,500 as a minimum job charge. Load explosives in holes and detonate, by pattern spacing. CY per hour shown is for a 5-man crew.
    Using explosives, per pound — Lb 5.46 — — 5.46
        6' x 6' pattern (26 CY per hour) C1@.192 CY 16.40 7.94 .85 25.19
        7' x 7' pattern (35 CY per hour) C1@.144 CY 12.30 5.96 .64 18.90
        7' x 8' pattern (47 CY per hour) C1@.106 CY 9.55 4.39 .47 14.41
        9' x 9' pattern (60 CY per hour) C1@.084 CY 8.18 3.48 .37 12.03
    10' x 10' pattern (72 CY per hour) C1@.069 CY 6.83 2.86 .31 10.00
    12' x 12' pattern (108 CY per hour) C1@.046 CY 4.64 1.90 .20 6.74
    14' x 14' pattern (147 CY per hour) C1@.034 CY 3.26 1.41 .15 4.82

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