Description
The Yankee Canyon County Road A-25 Subsidence Mitigation Project involves the mitigation of subsidence along Yankee Canyon County Road A-25 in Colfax County, New Mexico. The project includes drilling, grouting, and backfilling of holes to stabilize the road. The contractor will be required to provide a drill hole cover for each completed hole, inject support grout for holes categorized as void fill, and backfill all boreholes with grout. The contractor will also be responsible for monitoring open and connected holes for the flow of grout, protecting and preserving borehole location markers, and taking reasonable measures to avoid traffic conflicts.
• The project requires the contractor to drill a minimum of 5 feet below the mine floor for each hole.
• The contractor must provide a ground movement monitoring plan and a real-time grout pump monitoring and logging plan.
• The contractor must submit resumes of management, supervisory, and key personnel for approval by the project engineer.
• The contractor must provide a mix design for the project, indicating sources and types of grout materials, with volumetric proportions and field test data.
• The contractor must submit accurate daily records of weather conditions, hours worked, drilling footage, and grouting quantities.