Instrumentation Oversight Protects Century-Old Structures During East Harlem Tunneling Second Avenue Subway Phase 2 extends the Q line north from 96th Street to 125th Street in East Harlem and adds three new stations at a construction cost of approximately $7 billion. The work includes soft ground and hard rock tunneling, shaft construction, controlled production blasting in a dense urban corridor, and protection of historic structures and active rail lines, executed across f

Emprise Geotechnical Team Supports Tunnel Alternatives Assessment Beneath Knik Arm The Knik Arm Tunnel Feasibility Study evaluated tunnel alternatives beneath Knik Arm to improve long-term connectivity between Anchorage and Port MacKenzie. The study integrated alignment design, geotechnical data, geological assessment, and current tunneling technology to identify technically and economically viable crossing options and narrow the field to preferred alternative alignments. Sub

Ground Modeling Optimizes TBM Launch Design in a Sensitive National Park The Snowdonia Visual Impact Provision (VIP) project involves relocating a section of the existing overhead transmission line between Pentir and Trawsfynydd substations into a 3.4 km-long TBM-driven tunnel. This work significantly improves visual amenity and landscape character within Snowdonia National Park. During early design, an opportunity was identified to optimize the proposed Garth Sealing End Com

Geostatistical Modeling Supports Complex Cavern and Tunnel Design in Hong Kong The Relocation of Diamond Hill Fresh Water and Saltwater Service Reservoirs involves moving the existing DHSRs into four newly constructed underground rock caverns and the construction of a vehicular access tunnel (645 meters long). The project addresses long-term storage and resilience needs while overcoming geological challenges, including zones of weak and deeply weathered rock. Emprise supporte

Differing Site Condition Claims Support The South Academy Widening Jack and Bore project installed a 60-inch drainage pipe beneath active BNSF and UP tracks as part of El Paso County’s corridor improvements. Emprise supported the County by reviewing geotechnical data, evaluating differing site condition claims, analyzing contractor assessments, and verifying post-grouting stability. Our work ensured the jack and bore proceeded safely, mitigated subsurface uncertainty, and pro