The contract is for the AML Project 17.6C-BRS-3F, which involves drilling and grouting in Rock Springs, Peacock No. 12, West Blairtown, and 1620 W 2nd Street. The project duration is 180 calendar days and includes rotary drilling, exploratory drilling, coring, hole backfilling, and surface restoration work. The contract was awarded to C.J. Mahan Construction Company, LLC and Keller North America, Inc. with a total bid of $4,503,400.00 and $4,728,570.00 respectively.
• The project requires the injection of moderate slump grout into mine voids, workings, and rubblized zones.
• The contractor shall be responsible for formulation of mix designs to meet the stipulated grout performances.
• The project involves drilling 4-inch minimum diameter boreholes to a maximum vertical depth of 400 feet.
• The contract includes a mandatory bid meeting and requires bidders to submit questions in writing.
• The contract has a total of 7 addendums.