Earthwork Volumes n n n Spec Requirements End

Earthwork & Volumes n n n Spec Requirements End Areas End-area Volumes Borrow Pit Volumes Mass Diagrams Cost Estimates

Earthwork Specs n Payment based on excavation (Cut) n n n Specs define methods for cut and fill Typically not paid for fill Based on “Excavation measured in place as computed from survey notes” n n Not weighing, counting truck rounds Look for spec allowing contractor to dispute volumes in a certain area

Excavation Specs n Common excavation n Determined from survey notes Describes most of work Rock/Muck n n n Rock requires blasting Muck requires deep dig, granular fill Before/after volume survey

Haul Payments n Volume payments - $/cy Excavation n n Free Haul - Stations Overhaul - $/cy-stations Borrow - $/cy n n Separate lines for common, rock , muck Covers cost of lease, haul, reclamation Waste - $/cy

End Areas n Based on n Cross-sections Typical section Area – ft 2 n n Cut Fill CL

Construction Grade Staking n n Based on “typical section” Stake centerline, slope “breakouts”

Slope Stakes 12’ + 4’(4) + 8’ + 6. 3’(4) = 61. 2’

Slope Staking 12’ + 3. 7’(4) = 26. 8’

End Area Calculations

End Area Calculations n Level Sections n 3 -level Sections n Triangular Sections n 5 -level Sections n Other Sections

Level Sections

3 -Level Sections

5 -Level Sections

Transition Sections

End Area Calculations n n Planimeter Coordinate Calculations n n Similar to coordinate area Start/end at same point

Coordinate Areas 30 ‘ top, left shoulder (-15, 0) Assign (0, 0)

Coordinate Calc Example

End-Area Volumes AI = 390. 6 ft 2 AH = 338. 3 ft 2 AG = 144. 8 ft 2 AE = 15. 6 ft 2 AE = 15. 0 ft 2 AD = 113. 2 ft 2 AB = 258. 2 ft 2 AA = 338. 2 ft 2