Mining & Exploration

Mining is an industry that relies on a variety of engineering disciplines. From mining, geologic, civil, geotechnical, mechanical, chemical and environmental engineering, our in-house capabilities and deep bench of resources allows Bowman to provide total site and infrastructure solutions, from initial site exploration through reclamation.

In every aspect of a mining project’s lifecycle, Bowman is committed to delivering “fit for purpose” solutions with a sense of urgency and a strong commitment to client service and quality. Our clients additionally benefit from our ability to navigate the regulatory process and meet tight schedules, while maintaining a culture high in regard for health and safety standards throughout all phases of project execution. By consistently delivering high-quality, innovative, cost-effective and efficient management of mine site and design challenges, Bowman delivers successful projects time and again.

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Capabilities

Fit for Purpose Solutions, Combined with a Sense of Urgency and Strong Commitment to Health, Safety and Quality Service. 

Bowman has a well networked and highly collaborative team of engineering, land survey and geoscience professionals that provide exceptional mining services including:

Mine Water Resources Management
• Hydrogeologic and Hydrologic Field Investigations
• Surface Water Modeling
• Hydrogeologic Modeling
• Mine Water Supply
• Mine Water Treatment
• Storm Water Management

Environmental Baseline Studies
• Soil
• Vegetations
• Ornithological
• Small Mammals
• Surface Hydrology
• Hydrogeology

Aquatic Habitat Assessments
• Aquatic Vegetation
• Wetlands
• Stream Delineations / Classifications
• Macroinvertebrate
• Riparian

Permitting & Compliance
• NEPA
• RCRA
• CERCLA
• NPDES
• Phase I & Phase II Environmental Site Assessments
• Environment Impact Studies

Reclamation & Remediation
• Remedial Investigation / Feasibility Study (RI / FS)
• Remedial and Reclamation Plans and Designs
• Construction Management
• Construction Quality Assurance

Geologic Consulting
• Geotechnical Investigation
• Geologic Investigation
• Geologic Modeling
• Core Logging
• Petrographic Analysis
• Bedrock Profiling

Mine Planning
• Exploration
• Geochemical Block Modeling
• Resource and Reserve Reporting
• Mine Planning
• Pit Optimization
• Fleet Optimization

Mineral Process Plant Design
• Crushers
• SX / EW
• Ore Conveyance
• Acid Plants
• Piping & Pumping Systems

Mine Facility Design
• Rock Stockpiles
• ROM Leach Stockpiles
• Engineered Heaps
• Tailings Storage Facilities (TSF)
• Lined Impoundments

Mine Infrastructure Design
• Operational Infrastructure
• Roads
• Utility Corridors
• Martial Transportation Corridors
• Facility Site Designs
• Offices
• Warehouses
• Equipment Turnarounds
• Septic Systems
• Fuel Docks
• Substations
• Parking

Capital Project Controls
• Project Schedules
• Project WBS
• Forecasts and Accruals
• Variance Analysis
• Change Management
• Project Cost Reports

Survey
• Terrestrial and Aerial LiDAR
• 3D Scanning
• UAV Mapping
• Topographic Maps
• Construction Staking
• Bathymetric Surveys

Construction Quality Assurance

Construction Management

Experience

Fine Ore Cusher – 7B Conveyor Counterweight Evaluation

Southeast, AZ

The existing counterweight on the 7B conveyor had a winch system with inadequate lug connections and was rigged at an improper angle, which created structural integrity issues. Bowman prepared an economic trade-off study and general arrangements for counterweight lifting methods.

Secondary (fine) Ore Cusher-7C Dribble Chute and Platform

Southeast, AZ

The client was looking for a safer and more efficient way to transfer ore to the main course ore bin. Bowman produced general arrangements and mechanical drawings for the project.

Primary Crusher Belt Feeder – Motor Lifting Plan

Southeast, AZ

Project objective was to evaluate existing capacity of ceiling beams for trolley and hoist system designed to remove and install belt feeder motors to a roof opening area. Bowman provided a load rating and lifting plan for the belt feeder motors.

Thomas Jefferson’s Monticello

Charlottesville, VA

Thomas Jefferson’s home, Monticello, was a working, 5,000-acre plantation that was home to Jefferson and hundreds of other people. In 2022, the Monticello archaeology team contracted our team to acquire 30 points per square meter (ppm) lidar of the original 5,000-acre to identify unseen traces of past agricultural land use.

Sierrita Mine Access Road Grading and Drainage Plan

Southwest, AZ

Bowman provided engineering services for a construction drawing package for access road grading and drainage improvements. The haul roads were severely damage during storm events so collection, conveyance channels, sediment traps and culverts were designed to manage a 25-year, 24-hour storm event.

New SX Settlers Feasibility Engineering

Southwest, AZ

Based on previous wash settler design experience, Bowman was uniquely qualified to do a feasibility study (FS) design for a new solvent extraction (SX) plant at a different operation for the Sierrita Mine. The project required a closely coordinated team of process, mechanical, civil, structural and electrical engineers.

Hayden AB-BC TSF Decant System

Southwest, AZ

Bowman provided construction engineering services. Because of changes in the planned use of the AB-BC Tailings storage facility, the diameter of the slurry distribution pipes were reduced from 18” to 12”. This and other changes were implemented in the pump set ups. These changes resulted in overall improved decant system efficiency.

Harleville Hydrogeologic Investigation

Harleville, SC

Bowman geologists/hydrogeologists were responsible for the implementation of a groundwater investigation relative to a proposed quarry deepening.

Western New York Hydrogeologic Investigation

New York

Bowman completed a drainage basin analysis and groundwater study to evaluate the impact mining would have on the regional watershed within the Adirondack Mountains.

Drainage Basin Analysis and Groundwater Study

New York

Bowman completed a drainage basin analysis and groundwater study to evaluate the impact mining would have on the regional watershed within the Adirondack Mountains.

New York Hydrogeologic Investigation

New York

Bowman project hydrogeologists evaluated the deepening of a quarry that was located immediately adjacent to the Hudson River with a floor 200-ft below the river. A field investigation was developed, and an analysis was performed to evaluate the potential to deepen the quarry by an additional 100-ft.

Wetland Delineation-Groundwater Impact Assessment

Groton, CT

Bowman investigated the groundwater and surface water relationships for a proposed mining site, which included an upland wetland system and surface drainage within the drainage basin.

Groundwater Investigation and Monitoring Plan

Stockertown, PA

Bowman prepared a groundwater work plan and implemented a groundwater investigation. The purpose of the investigation was to address the karstic terrain surrounding the 300-acre cement quarry.

Hydrogeologic Investigation

Goshen, NY

Bowman geologists were responsible for the implementation of a groundwater investigation relative to a proposed quarry deepening. The work consisted of drilling oversight and logging of approximately 1,000 LF of bedrock borings, installation of bedrock piezometers, stream gauging, photolineament analysis, aquifer testing, and geologic mapping.

Visual Impact Analysis

New York

Bowman evaluated visual impacts to Viewshed for Hooper Garnet Mine Expansion. A digital terrain model was used to create expansion footprint. Topographic mapping was used to predict visual impacts. Mitigation measures and reclamation planning were developed to reduce visual impacts to the community.

Mine Water Infiltration Study

Stockertown, PA

Bowman directed a $2M program to design and construct a series of liner systems in the Bushkill Stream which borders Hercules Cement’s Stockertown Quarry. Water from the stream historically leaked into the quarry through karstic features with required expensive dewatering efforts.

Yellowstone Phased Expansion Economic and Optimization Analysis

Montana

Bowman provided economic modeling, pit design, geologic modeling, logistics analysis, NPV analysis and mine plan sequencing.

Mine Expansion Project

Various Locations

Bowman was contracted to provide geologic exploration, geochemical modeling, pit design, tailings storage design and geotechnical services. Bowman also provided required reclamation planning, visual, sound and air quality studies in support of the mine expansion.

Run of Mine (ROM) Overpass

Confidential

Bowman was contracted to provide engineering services for a proposed overpass to separate haul truck traffic on a ROM Haul Road and light vehicle traffic on a mine access road. The overpass allows efficient and safe mine site traffic circulation by eliminating a Haul Road and light vehicle traffic road intersection.

Living Breakwaters

Staten Island, NY

Partnered with Weeks Marine, our team provided multiple roles and services for this project. We acted as the geologist of record and provides construction material inspection and oversite services at the breakwater materials extraction source (Carver Johnstown Quarry).

Acid Line Re-Route

Confidential Location

Bowman prepared plans to re-route an existing acid pipeline that encounters a proposed fine ore stockpile. The design work included close coordination with engineering firm that was designing the stockpile.

Mined Land Reclamation Articulated Concrete Blocks

AZ

Confidential client in SE Arizona commissioned Bowman to conduct construction quality assurance (CQA) for articulated concrete blocks (ACB’s) installed in reclaimed mine areas for spillway down chutes. Verified installation of subgrade, geotextile, filter layer, geogrid, mats, concrete grout lines and anchor trenches to meet manufacturer’s specifications.

Heavy Duty Truck Shop Wash Rack

AZ

Bowman provided engineering services for the detail engineering for the Heavy-Duty Truck Shop (HDTS) traffic area grading and a new truck wash rack to replace existing inadequate infrastructure.

Mineral Creek Concrete Liner Repairs

AZ

A mile-long concrete channel was constructed at the ASARCO Ray Mine to convey contact water from the Mineral Creek outlet downstream near the mine entrance. A mile-long concrete channel was constructed at the ASARCO Ray Mine to convey contact water from the Mineral Creek outlet downstream near the mine entrance.

ASARCO Hayden Operations Slag Processing Project

Gila County, AZ

Bowman provided construction management, quality assurance, plant commissioning and coordination between contractors during the commissioning and start-up phase. 

BIM 360 Transition Project

AZ

Bowman was contracted to scan historic drawings and organize drawing files for easy retrieval using laptops and notepads in the field. Our team migrated existing drawing storage system into BIM 360 input meta-data to allow for easy retrieval of information.

ASARCO Ray Mine Big Box Lake Dredging

Pinal County, AZ

Bowman is providing construction management services that includes mechanical dredging of approximately 1M cubic yards of sediment, haulage, and disposition of dredged materials to a stockpile area 1.75 miles from the reservoir dam.

ASARCO Ray Mine PLS Tank Repair

PLS is stored in a stainless steel lined concrete tank at the ASARCO Ray Mine. During construction, the tank was inspected by several techniques but approximately 35 leaks were detected and attributed to defective and substandard welds. Bowman was asked to inspect and catalog the weld where leaks developed and to work with a specialized welding firm to implement a plan to repair the tank permanently.      

Capital Project Controls

Bowman’s project control services include the following: develop new techniques and/or improved processes to analyze project cost, productivity and schedule, review project analysis on budget tracking, financial forecasting, project evaluation and monitoring and challenges to ensure project supports goals and objectives and develop project forecasts and conduct budget and schedule variance analysis.

Clifton Guest House Structural Investigation

Clifton, AZ

Bowman was commissioned to perform a geotechnical/foundation, structural/framing and plumbing investigation to address observed deteriorating and distressed conditions of the house.

ASARCO Hayden Concentrator AB-BC Tailings Storage Facility Stability Buttress

Safford, AZ

Bowman provided construction quality assurance (CQA) services. The project includes site preparation, utility abandonment, earthwork for the stability buttress, Gila and San Pedro River crossings, constructed drainage to the emergency ponds and emergency channel, storm water management systems, and other improvements.

Reverse Osmosis and Filter Press Plant Design and Instrumentation Upgrades

Safford, AZ

Bowman provided designs and documentation services. including review of existing drawings and project information, engineering calculations, process and instrumentation drawings, process flow diagrams, piping/mechanical drawings, sections details, mechanical equipment list and specifications and electrical and instrumentation controls.

U.S. Silica Inventory Verification

LA, MD, MT, NM, ND, OH, OK, PA, TX, WV

Our team was hired by U.S. Silica, a nationwide sand and aggregate company, to conduct volume analysis on stockpiles as a third-party inventory verification. We have performed volume analysis scans every quarter since 2014 in various states, including Texas, New Mexico, Oklahoma, Louisiana, Pennsylvania, Ohio, West Virginia, Maryland, North Dakota, and Montana.

Confidential ILS System

Southeast, AZ

Bowman was retained to provide detailed design of concrete footings and steel pipe supports for this Intermediate Leach System (ILS) which includes two pipelines.

Confidential Leach Pad Phase II

Southeast, AZ

Bowman performed value engineering and design optimization for the phase II design of a leach pad in a canyon with aggressive slopes (~2.5H:1V). The design included liner subgrade, geomembrane and GCL, solution collecting pipe network, and overliner drain rock.

Confidential Stockpile Dams

Southeast, AZ

Bowman performed the engineering design and construction quality assurance for multiple stormwater retention dams. The design process included watershed analyses, lithological investigation and interpretation, earthen structure stability analyses, and flow considerations for a 100-year storm event.

Confidential Filter Infrastructure

Southeast, AZ

Bowman provided the concrete slabs, foundations, and anchor designs for new infrastructure for the expansion of the Hydromet area to allow the SX/EW facili-ties to handle increased throughput. This work included the structural design and drawings, identifying civil components such as tops of concrete on footings and slabs, ensuring drainage to the existing drain sump and the addition of a contain-ment curb to improve capture of spills.

Confidential Haul Road Culverts

Southeast, AZ

As a result of a new pit being developed at the mine, a haul road was developed from the pit to the existing crushing facility. Bowman designed six (6) culverts that allow stormwater to flow under the new haul road.

Confidential Wash Settlers

Southeast, AZ

Bowman, having previously designed the original settlers during another project, designed two new Wash Settlers with related structures, containment, equipment, storage, piping and instrumentation.

Confidential Stormwater Diversions and Culverts

Southeast, AZ

Bowman designed three stormwater diversions to protect a leach pad. These diversions required the engineering design of several structures including channels, levees, energy dissipation structures and box culverts. In conjunction with these designs, Bowman developed method specifications for compaction and a design for soil cement that utilized the material sourced from the channel excavation.

Confidential Early Mine Water Supply

Southeast, AZ

Bowman developed a water distribution plan to provide potable and construction water to thhis project. This included the design of wells, impoundments, booster stations, overland pipelines and storage facilities. The first stage of this system currently operates at 650 psi and transports water over 2 miles.

Confidential Conveyor Corridor

Southeast, AZ

A new leach pad is being developed to meet the needs of a new pit. A major earthwork project was undertaken to link the existing conveyor system to the new leach pad. As part of this project, Bowman provided temporary traffic control and temporary road designs as well as engineered drawings, specifications, construction scopes of work, and bid packages for the earthwork and new traffic underpass.

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