Heavy Civil and Mining
Heavy Civil & Mining Projects
- Estimated and engineered construction systems and plans for dams, earthwork, bridges and falsework, cofferdams, wellpoint dewatering systems, and excavations to build these structures. On large-scale construction projects, designed and managed construction of sheeting and shoring systems to support deep excavations both in urban areas and in remote sites. Specialized training and experience in the design and construction of rubber-lined mine tailings impoundments and tailings dams.
- Project Engineer and Cost Estimator for a leading national heavy civil contractor for construction of dams, river bridges, and tunnels. Estimated costs for two power generating stations in British Columbia, Canada.
- Engaged with a mining company to develop and construct a mine, which involved a 10,000-ton-per-day underground copper mine and concentrator located in Utah’s Bingham Mining District.
- Involved in the underground development of a metallurgical coal mine in Brookwood, Alabama. Work involved the sinking of six concrete-lined mine shafts, 20 feet in diameter, and 2,000 feet deep.
- Project Engineer at a Utah-based copper company. Involved in the initial construction of a mine development in Bingham Canyon, Utah.
- Chief Engineer for an engineering and construction company in its Salt Lake City office. Managed the design phases of EPC projects in the mining and industrial sectors, taking many projects from the piping and instrumentation diagram stage through final design and completion.
Project Details
Keystone Underground Block Cave Mine
Owner: Rio Tinto/ Kennecott Utah Copper
Location: Salt Lake City, Utah
Total Planned Development: $3.5 Billion
Shaft Re-Development: $80 million
Role: Engineering Manager, Area Manager
Project Details
North Ore Shoot Shaft Development
Owner: Kennecott Utah Copper / Rio Tinto
Location: Salt Lake City, Utah
Project Cost: $100 million
Project Details
Carr Fork Copper Mine
Owner: Anaconda Mining/Atlantic Richfield Company
Location: Tooele, Utah
Total Project Value: $1.1 Billion
Role: Construction Manager
Project Details
Smelter Modernizations
Owner: Kennecott/Rio Tinto
Contractor: Dravo
Location: Salt Lake City, Utah
Combined Project Costs: $100 million
Role: Contractors Chief Engineer
Project Details
Mountain Pass Mine, Combined Heat and Power
Owner: Molycorp Minerals
Contractor: Bodell Construction
Location: Mountain Pass, California
Total Project Value: $100 million
Role: Project Director
Concrete Projects
Over his engineering and construction career, Mr. Vallez has had experience with all types of concrete structures including:
- High-rise cast-in-place post-tensioned slabs
- High-rise cast-in-place pan slabs
- Slip-formed concrete towers
- Parking structures using precast concrete
- Underground mine shaft concrete linings
- Concrete linings for underground tunnels and structures