Estimating PS&E – Plans, specifications and estimate 1

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

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

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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: ◦ Clearing and Grubbing ◦ 203.xxxx Grade and Reshape Ditches ◦ 304.xx Subbase ◦ Establish Turf ◦ Survey and Stakeout *Special specifications—General or Special (must be approved) 6

Units Unit abbreviationsDefinition LSLump Sum EAEach CYCubic Yard SYSquare Yard LFLinear Feet TNTon MOMonth 7

Units-Metric Unit abbreviationsDefinition CMCubic Meters SQMSquare meters MTMetric Ton KGKilograms MMeters 8

Specifications center/engineering/specifications center/engineering/specifications 9

Pay Item Catalog 10

Weighted Average Item Price Report (WAIPR) 11

Special Spec Repository 12

Contingency Added to estimate to account for unknowns Usually a percentage of final cost 13

Cost Estimate Example Item #DescriptionUnitQTYPriceSubtotal Clear & GrubLS1.0$12, Earth Cut & EmbCY14,545.0$12.00$174, Bale DikesLF42.0$7.50$ Asph Base CourseTN6392.0$38.00$242, ” RCP End SecEA4.0$700.00$2, OfficeMO6$1,000.00$6, Traffic SignEA8$170.00$1,

Backup for Estimate Example ITEM (White Paint Reflective Paint Stripes) 2 Shoulder Stripes Sta to Sta *448’ = 896’ Say 900’ 15

Asphalt – English Tons Tons per Cubic Foot (Base) Tons per Cubic Foot (Binder) Tons per Cubic Foot (Top-6F) Old Marshall Design New Superpave????? 16

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 17

Lump Sum Analysis Example Item (Temporary Traffic Signal) Labor Costs ◦ Backhoe Operator-$30.05/hr ◦ Electrician-$32.99/hr ◦ Laborer-$22.95/hr Prevailing Wages Installation and Removal of Temp. Poles ◦ 1 Backhoe Operator $30.05/hr * 16 hours = ◦ 2 $22.95/hr * 16 hours = Installation and Removal of Temp. Signal Heads ◦ 1 $32.99/hr * 16 hours = ◦ 2 $22.95/hr * 16 hours = Installation and Removal of Controller ◦ 1 $32.99 * 16 hours = ◦ 1 $22.95 * 16 hours = 18

Lump Sum Analysis Example-Cont. Item (Temporary Traffic Signal) Materials ◦ Temporary Poles $1, each ◦ Temporary Signal Heads $ each ◦ Controller, Fixed Time $1, ◦ Misc. Hardwire and Wire $1, Equipment (Installation and Removal) ◦ 1 Bucket $18.00/hr * 24 hours ◦ 1 $35.00/hr * 24 hours Profit and Overhead (20%) 19

Estimate Shares Highway Bridge Utilities Different Counties 20

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 21

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