<p><p><h2>Commentary</h2>The cost of Rapid Impact Compaction (RIC) is typically captured in a contract bid item, measured by the square foot. Included in this bid item are associated incidental costs such as:<br><ul> <li>Preparation of layout drawings.</li> <li>Compaction and monitoring of a test area.</li></ul>Other costs associated with RIC that may be measured and paid for separately include:<br><ul> <li>Recompaction due to excessively unstable materials or obstructions.</li> <li>Granular fill material used for filling of RIC craters where multiple passes are required.</li> <li>Alternative ground improvement methods for areas that do not meet the specified termination criteria after three passes of RIC.</li></ul><h2>Cost Information Summary</h2>An average production rate for RIC ranges from 9,000 to 30,000 SF per day. The following table lists items which are associated with the cost of RIC and approximate cost ranges. 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 the installation of RIC.</p><p><table class='tablepress' id='tablepress-118'><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 >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 >Rapid Impact Compaction</td><td >Greater Than 25,000</td><td >SF</td><td >$1.00</td><td >$2.00</td><td >Excessively soft and non-uniform soil conditions may require multiple RIC passes which will reduce production rates and thus increase the unit price

Grid spacing of RIC will affect the price per square yard

Obstructions that interfere with RIC require over-excavation and additional RIC passes
</td></tr></tbody></table><h2>Historical Cost Information</h2>Research efforts did not yield any RIC bid tabulation data from state highway agencies.<br><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>