Estimating Estimating

PS&E – Plans, specifications and estimate

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Types of Estimates Types of Estimates

Ball-Park (Planning phase)

Preliminary (Design Report/EIS)

Detailed (PS&E---Detailed Design)

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Estimate QualityEstimate Quality

Good book-keepingAccurate backup of quantitiesFamiliarity w/ projectExperience

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Estimating ProcedureEstimating 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

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Item NumbersItem NumbersReferenced to spec bookExamples:

◦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)

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UnitsUnitsUnit abbreviations

Definition

LS Lump Sum

EA Each

CY Cubic Yard

SY Square Yard

LF Linear Feet

TN Ton

MO Month

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Units-MetricUnits-MetricUnit abbreviations

Definition

CM Cubic Meters

SQM Square meters

MT Metric Ton

KG Kilograms

M Meters

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SpecificationsSpecificationshttps://www.dot.ny.gov/main/

business-center/engineering/specifications

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Pay Item CatalogPay Item Catalog

https://www.dot.ny.gov/pic

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Weighted Average Item Price Weighted Average Item Price Report (WAIPR)Report (WAIPR)

https://www.dot.ny.gov/divisions/engineering/design/dqab/waipr

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Special Spec RepositorySpecial Spec Repository

https://www.dot.ny.gov/spec-repository-us/

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ContingencyContingencyAdded to estimate to account for

unknowns Usually a percentage of final cost

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Cost Estimate ExampleCost Estimate ExampleItem # Description Unit QTY Price Subtotal

201.0601 Clear & Grub LS 1.0 $12,500.00

$12,500.00

203.0100 Earth Cut & Emb

CY 14,545.0

$12.00 $174,540.00

10209.0100

Bale Dikes LF 42.0 $7.50 $315.00

403.1100 Asph Base Course

TN 6392.0 $38.00 $242,896.00

603.7303 24” RCP End Sec

EA 4.0 $700.00 $2,800.00

637.0701 Office MO 6 $1,000.00

$6,000.00

645.2140 Traffic Sign EA 8 $170.00 $1,360.00

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Backup for Estimate ExampleBackup for Estimate ExampleITEM 640.0102 (White Paint Reflective Paint ITEM 640.0102 (White Paint Reflective Paint Stripes)Stripes)2 Shoulder StripesSta 26+44 to Sta 30+922*448’ = 896’Say 900’

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Asphalt – English TonsAsphalt – 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?????

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Lump Sum Price AnalysisLump Sum Price AnalysisEstimate 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

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Lump Sum Analysis ExampleLump Sum Analysis ExampleItem 619.13 (Temporary Traffic Item 619.13 (Temporary Traffic Signal)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 =

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Lump Sum Analysis Lump Sum Analysis Example-Cont.Example-Cont.Item 619.13 (Temporary Traffic Item 619.13 (Temporary Traffic Signal)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%)

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Estimate SharesEstimate Shares

Highway BridgeUtilitiesDifferent Counties

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Engineer’s EstimateEngineer’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 contract21

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