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Published byMay Waters Modified over 9 years ago
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Lunch
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Estimates Ballpark Accountant
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Typical Stages Conceptual (Alternatives) Schematic 30% Plans 60% Plans 90-100% Plans
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Concept Example Total Cost = Pavement Cost/X –Pavement Cost = similar project or ask expert (District Pavement Engineer )
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Pavement (new) Flexible (ACP) –light truck (rural FM) $20/SY –medium to heavy (minor arterial) $55/ SY -$65/SY Rigid (CRCP) –light traffic $60/SY –medium to Heavy $85/SY - $95/SY
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Pavement Cost (resurface) Seal Coat = $3/sy Overlay = $8-10/sy Rehab = $10-15/sy
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Bryan District Average Construction Cost Grade Separation –$ 10 Million 2 Lane to 4 Lane –$ 2.3 Million/ Mile 2 Lane to Super 2 (passing zones) –$ 500k -1.5 Million/ Mile Signal –$ 150,000 Freeway – Controlled Access –$ 12 Million/ Mile
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Programming - Strategies Gather data from similar projects –Cost/ mile equivalents Original plans TxDOT’s – Roadway Design Manual “Green Book” (Policy on Geometric Design of Highways and Streets TxDOT’s – Bridge Design Manual Site visit –note existing structures –consider topography Bid tabs and Estimator Use a 15-20 % mark up contingency
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General Estimate –Prepare ROW (Item 100) –Pavement (Item 300) –Structures (400s) Bridges Culverts/ Inlets/ Storm sewer –Items 462 through 466 Retaining walls –Item 423 –Embankment/ Excavation (Item 132/110) –Signals (600) –Contingency (15-20% subtotal 1) –Mobilization (10% subtotal 2)
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Items ftp://ftp.dot.state.tx.us/pub/txdot- info/des/specs/specbook.pdf (2004 Spec Book)ftp://ftp.dot.state.tx.us/pub/txdot- info/des/specs/specbook.pdf http://www.dot.state.tx.us/insdtdot/orgchart/ cmd/cserve/bidprice/s_0101.htm(state wide and region specific) http://www.dot.state.tx.us/insdtdot/geodist/b ry/cserve/bidprice/s_0101.htm (Bryan District Low Bid)http://www.dot.state.tx.us/insdtdot/geodist/b ry/cserve/bidprice/s_0101.htm
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Structures (400 Items) Culverts (Item 462) Reinforced Concrete Pipe (Item 464) Inlets/ Manholes (Item 465) Headwalls/ Wingwall (Item 466) Safety End Treatment (Item 467) Retaining Walls (Item 423)
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Estimating Bridge Type http://www.txdot.gov/business/contractors_consultants/bridge/super_design.htm
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Bridge Design Manual Chapters 4 & 5
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Bryan District Tx Girder Structure = $75/(sq. ft) Bryan District Average Tx Girder = 75/$SF
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Estimator supports generation of cost estimates using cost-based and bid- based techniques. Regional information
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Accounts for quantity
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http://www.dot.state.tx.us/business/project s/estimator.htm Wow! what a great program… but where can I get a copy?
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Construction Cost = $ 5.9 Million
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Construction Cost = $ 23.5 Million
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Estimate = $23.3 Million
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