Representative DSC Claims & Dispute Projects
Atoka Water Transmission Tunnels, Oklahoma - DSC Site Investigation
Golden Geotechnics was contracted by the MTBM tunnel contractor during construction to provide a multi-phase geologic investigation that included rock core boreholes to accurately characterize the complex lithologies on the site. The investigation was able to show that the conglomerate was an order of magnitude stronger than baselined and abrasivity values four times the baselined value to support the differing site condition claim.
I-76 MTBM Crossing, CO - DSC Site Investigation
Golden Geotechnics was contracted by the MTBM tunnel contractor mid drive to investigate the cause of the total wear of the outer tooling on the MTBM that had significantly reduced MTBM penetration rate. GGI Principal Geologist performed a two phased site investigation to evaluate the potential for higher abrasivity ground than had been baselined, first with a continuous soil core and then with a vibratory sonic rig with switchable rock coring.
North Interceptor Sewer Replacement, NY - DSC Design and Encountered Ground Conditions Assessment
For three tunnel reaches of 60-inch sanitary sewer the ground was characterized as a soft shale but during shaft construction the contractor encountered low-grade metamorphosed slate that was not characterized during design, and instead the ground behaved as a mixed face condition creating multiple issues. Golden Geotechnics was contracted by the MTBM tunnel contractor's team to recharacterize the ground conditions to support the differing site condition claim for the first two reaches and made recommendations to the contractor’s cutter wheel retooling and separation unit to improve capacity.