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Estimating

Estimating. PS&E – Plans, specifications and estimate. Types of Estimates. Ball-Park (Planning phase) Preliminary (Design Report/EIS) Detailed (PS&E---Detailed Design). Estimate Quality. Good book-keeping Accurate backup of quantities Familiarity w/ project Experience.

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Estimating

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  1. Estimating PS&E – Plans, specifications and estimate

  2. Types of Estimates • Ball-Park (Planning phase) • Preliminary (Design Report/EIS) • Detailed (PS&E---Detailed Design)

  3. Estimate Quality • Good book-keeping • Accurate backup of quantities • Familiarity w/ project • Experience

  4. Estimating Procedure • List all item numbers-plans and similar plans • Estimate quantities and prepare a backup for each item # • Assign prices to each item (WAIPR) • Lump sum price analysis • Summary of quantities • Add contingency • Summarize final costs

  5. Item Numbers • Referenced to spec book • Examples: • 201.07 Clearing and Grubbing • 203.xxxx Grade and Reshape Ditches • 304.xx Subbase • 610.0203 Establish Turf • 634.01 Survey and Stakeout *Special specifications—General or Special (must be approved)

  6. Units

  7. Units-Metric

  8. Specifications • https://www.dot.ny.gov/main/business-center/engineering/specifications

  9. Specifications-Example 201.06

  10. Specifications-Example 201.06

  11. Pay Item Catalog (PIC) https://www.dot.ny.gov/pic

  12. Weighted Average Item Price Report (WAIPR) https://www.dot.ny.gov/divisions/engineering/design/dqab/waipr

  13. WAIPR Example-201.07

  14. Special Spec Repository • https://www.dot.ny.gov/spec-repository-us/

  15. Contingency • Added to estimate to account for unknowns • Usually a percentage of final cost

  16. Cost Estimate Example

  17. Backup for Estimate ExampleITEM 640.0102 (White Paint Reflective Paint Stripes) • 2 Shoulder Stripes • Sta 26+44 to Sta 30+92 • 2*448’ = 896’ • Say 900’

  18. Asphalt – English Tons • .06865 Tons per Cubic Foot (Base) • .07525 Tons per Cubic Foot (Binder) • .07265 Tons per Cubic Foot (Top-6F) • Old Marshall Design • New Superpave?????

  19. Lump Sum Price Analysis • Estimate for items paid as a “Lump Sum” • Includes: • Labor • Materials • Equipment • Rental costs • Profit and Overhead • Typical lump sum items: • Clearing and Grubbing • Survey and Stakeout • Temporary Traffic Signals

  20. Lump Sum Analysis ExampleItem 619.13 (Temporary Traffic Signal) • Labor Costs • Backhoe Operator-$30.05/hr • Electrician-$32.99/hr • Laborer-$22.95/hr • Prevailing Wages http://wpp.labor.state.ny.us/wpp/publicViewPWChanges.do?method=showIt • Installation and Removal of Temp. Poles • 1 Backhoe Operator $30.05/hr * 16 hours = • 2 Laborers @ $22.95/hr * 16 hours = • Installation and Removal of Temp. Signal Heads • 1 Electrician @ $32.99/hr * 16 hours = • 2 Laborer@ $22.95/hr * 16 hours = • Installation and Removal of Controller • 1 Electrician @ $32.99 * 16 hours = • 1 Laborer @ $22.95 * 16 hours =

  21. Lump Sum Analysis Example-Cont.Item 619.13 (Temporary Traffic Signal) • Materials • Temporary Poles 4 @ $1,300.00 each • Temporary Signal Heads 4 @ $250.00 each • Controller, Fixed Time 1@ $1,000.00 • Misc. Hardwire and Wire $1,000.00 • Equipment (Installation and Removal) • 1 Bucket Truck @ $18.00/hr * 24 hours • 1 Backhoe @ $35.00/hr * 24 hours • Profit and Overhead (20%)

  22. Estimate Shares Highway Bridge Utilities Different Counties

  23. Engineer’s Estimate Quantities included in plans Engineer’s estimate not given to contractor Prices not available to contractor—each contractor provides their own bid Lowest bidder gets the contract

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