Charon Drilling

Herrenknecht Tunneling Systems, based in Sumner, WA, is a global leader in underground construction technology, offering a full range of innovative tunneling solutions for various industries such as road, railway, metro, hydropower, oil, gas, and mining. The company's cutting-edge products, including Tunnel Boring Machines (TBMs) and other specialized equipment, are used in major projects worldwide, from constructing underground rail links in the Alps to mining operations in Canada, showcasing their expertise in pioneering underground infrastructure.Generated from the website

Founded in 1920, DBM Contractors is a specialty contractor that provides heavy civil and specialty geotechnical construction services. The company provides project design, geotechnical load testing and preconstruction estimating services. Its earth retention services include soil nailing, systems piling, micropile stabilization, underpinning, soil mixing, and structural and architectural shotcretes. It provides soldier pile and lagging systems, slurry diaphragm walls, secant pile walls and rings, drainage control systems and internally braced systems. Its specialty geotechnical projects include earth retention, excavation support, dam anchorage and slope stabilization. The company offers ground improvement products and techniques, such as micropiles, displacement piles, stone columns, compaction grouting and consolidation grouting. DBM Contractors is located in Federal Way, Wash.