<p><p><h2>Commentary</h2>The costs of CFA piles on a highway project are typically captured in a contract bid item which is measured by the lineal foot (LF). Included in this bid item are the material, equipment, labor, and incidentals to construct a CFA pile project. Mobilization, quality control, and load testing associated with the installation of CFA piles may be measured and paid for separately.<br><h2>Cost Information Summary</h2>The following table lists construction cost items that are associated with CFA piles, along with approximate cost ranges. Cost ranges are based on data from 2003 through 2011. Readers should carefully examine the project characteristics and constraints and determine to what degree if any these factors may influence the actual cost associated with constructing CFA piles. For many continuous flight auger pile applications a working platform will be required. These costs should be included when comparing this technology with others. The cost of the geosynthetic for the working platform is provided in the Geosynthetic Reinforced Embankment cost information.</p><p><table class='tablepress' id='tablepress-76'><thead><th>Pay Item Description</th><th>Quantity</th><th>Unit</th><th>Low Unit Price</th><th>High Unit Price</th><th>Factors Which May Potentially Impact Costs</th></thead><tbody><tr><td >Continuous Flight Auger Piles
</td><td >Greater than 2,000</td><td >LF</td><td >$10.00</td><td >$40.00</td><td >Approximate cost ranges are applicable for CFA pile diameters from 12 to 24 inches
Unit cost increases as CFA pile diameter increases
Cost of grout materials is sensitive to material specifications and haul distance
Unit costs will decrease as depth increases
</td></tr><tr><td >Mobilization
</td><td >1</td><td >LUMP
SUM</td><td >$20,000</td><td >$40,000</td><td >Mobilization cost increases for distances greater than 500 miles
Phased projects may require multiple mobilizations
</td></tr><tr><td >Embankment</td><td >Greater than 5,000
</td><td >CY</td><td >$-</td><td >$-</td><td >Use historical costs that are representative of the project quantity, project conditions and project location</td></tr></tbody></table><h2>Historical Cost Information</h2>A sample of actual project costs is shown in the table below.</p><p><table class='tablepress' id='tablepress-77'><thead><th>Pay Item Description</th><th>Quantity</th><th>Unit</th><th>Low Unit Price</th><th>High Unit Price</th><th>Average Unit Price</th><th>No. of Bids</th><th>Bid Date</th><th>Source/Agency</th></thead><tbody><tr><td >Pile Auger Grouted, 24” Dia</td><td >279,946</td><td >LF</td><td >$6.18</td><td >n/a</td><td >n/a</td><td >1</td><td >5/25/2011</td><td >Florida DOT
</td></tr><tr><td >Augercast Piles, 14 inch</td><td >3,180</td><td >LF</td><td >$15.00</td><td >$34.36</td><td >$21.73</td><td rowspan=3 >6</td><td rowspan=3 >6/6/2008</td><td rowspan=3 >Michigan DOT</td></tr><tr><td >Test Pile, Augercast</td><td >2</td><td >EA</td><td >$6,000</td><td >$15,000</td><td >$9,133</td></tr><tr><td >Furnishing Equipment for Augering Piles</td><td >1</td><td >LUMP
SUM</td><td >$7,500</td><td >$35,000</td><td >$20,125</td></tr><tr><td >Augercast Piles 14</td><td >940</td><td >LF</td><td >$14.56</td><td >$28.00</td><td >$18.59</td><td rowspan=3 >6</td><td rowspan=3 >9/5/2003</td><td rowspan=3 >Michigan DOT</td></tr><tr><td >Augercast Piles 14 Test</td><td >2</td><td >EA</td><td >$6,000</td><td >$9,700</td><td >$7,700</td></tr><tr><td >Pile Augering Equipment, Furn</td><td >1</td><td >LUMP
SUM</td><td >$7,000</td><td >$27,480</td><td >$76,680</td></tr></tbody></table><h2>Conceptual Cost Estimating Tool</h2>The conceptual cost estimating tool is intended to be used to develop a preliminary project scoping cost estimate. This preliminary estimate can be based on the typical construction cost item values as contained in the Cost Information product or from user specified cost values when such are known. Users should read and understand the information in Cost Information product prior to using the cost estimating tool. You can download the Cost Estimating Tool to open a cost estimating spreadsheet for producing a preliminary project scoping estimate.</p><p><a class="arrow-link" href="https://www.geoinstitute.org/sites/default/files/geotech-tools-uploads/… the Cost Estimating Tool</a></p></p>