Why Mining Equipment Demands Specialized Heavy Haul
Mining equipment is not merely heavy — it is engineered to be heavy as a functional requirement. A 300-ton class electric drive haul truck carries 300 tons of ore per load because its frame, axles, and structure are built from thick steel plate designed to survive hundreds of thousands of load cycles in a rocky pit environment. An electric rope shovel that moves 100 cubic yards of rock per pass weighs over 1,000,000 pounds in operating configuration because the structural mass required to resist the forces involved in hard-rock digging is simply that great. These are not machines that can be made lighter without compromising their ability to do the work they exist to do.
When mining equipment must travel on public highways — to a new mine site, to an overhaul shop, back from a manufacturer after a major rebuild — that mass and those dimensions create one of the most complex heavy haul challenges in any industry. R&RM LLC has transported mining equipment since 2011, working with surface coal, copper, gold, iron ore, and aggregate producers, as well as equipment dealers and auction houses that move used mining fleets between properties or across the country for resale.
Surface Mining Equipment Transport
Surface mining — open pit, strip mining, and quarrying — uses the largest mobile equipment in the world. Moving surface mining equipment between properties, to and from overhaul shops, or from the manufacturer to the mine site is a major logistics undertaking that requires superload permits, specialized trailer configurations, and advance route engineering in most states.
Mining Haul Trucks
Mining haul trucks are the highest-volume transport commodity in the surface mining equipment category. Large surface mines operate fleets of 20, 40, or 80 haul trucks, and when a mine closes or a fleet is sold to a new property, those trucks must be moved. The most common sizes in transport include:
- Cat 785 and Komatsu HD785 (100-ton class): These mid-size haul trucks weigh approximately 200,000 to 250,000 lbs empty. Transport requires disassembly of the truck body and box from the chassis, with body shipped separately on a flatbed or RGN and chassis on a multi-axle lowboy. Standard superload permits typically apply in most states.
- Cat 789 and Komatsu 830E (175-ton class): Empty weights in the 300,000 to 350,000 lb range require hydraulic platform trailer transport for the chassis and separate dedicated loads for the body, front axle assembly, and major components.
- Cat 793, Komatsu PC930E, and Liebherr T 264 (220-240 ton class): Among the largest rubber-tired trucks transported by highway. Empty weights of 400,000 to 500,000 lbs require hydraulic modular platform trailers and extensive advance engineering. State permit processing for these moves is measured in weeks, not days.
- Cat 797F and Komatsu 980E (400-ton class): The largest class of haul trucks in common mine service. These machines are too large to transport on public highways in anything approaching assembled configuration — they are typically moved in major sub-assemblies: chassis frame sections, rear axle and motor housings, front axle assembly, operator cab, and truck body as separate loads, each requiring its own permit and trailer.
See our dedicated mining haul truck transport page for complete guidance on component-by-component breakdown and trailer selection for each class.
Electric Rope Shovels and Hydraulic Shovels
Electric rope shovels — the large cable-operated excavating machines that load haul trucks at the floor of an open pit mine — are arguably the most complex pieces of mining equipment to transport. Their operating weights range from 750,000 pounds for a mid-size machine like the P&H 2800 to over 3,000,000 pounds for the largest front-end machines. They are transported in major assemblies: revolving frame, lower works (crawler assembly), main hoist drum and machinery house, boom, handle and dipper — each major assembly transported as a separate superload.
Hydraulic face shovels used in hard-rock mining are somewhat smaller but still require substantial heavy haul planning. A Cat 6090 or Liebherr R 9800 hydraulic mining shovel in transport configuration is broken into the undercarriage, upper structure, boom, arm, and bucket attachment, with each major component requiring a separate permit and heavy-duty trailer. The sheer number of loads required to move one of these machines — often 15 to 30 individual highway loads — means that moving a single rope shovel or large hydraulic shovel is a multi-week project requiring careful coordination.
Rotary Blast Hole Drills
Rotary blast hole drills — the machines that drill the pattern of holes that are loaded with explosive to break ore and waste rock in open pit mines — are transported in components due to their height in operating configuration. The mast that supports the drill string is typically 60 to 80 feet tall when raised and must be lowered for transport, but even in transport position a large drill like the Cat MD6310 or Epiroc PitViper 351 presents height challenges. The drill frame, mast assembly, engine and compressor module, and crawler undercarriage are typically transported as separate loads. Major drill components require overwidth, overlength, and in some cases overweight permits depending on state legal limits.
Walking Draglines
Walking draglines — the enormous machines used in coal strip mining that walk on large eccentric pads rather than crawling on tracks — are typically erected in the pit and do not travel by highway. However, dragline components do travel by highway during initial assembly at the mine site: the tub, boom sections, A-frame structure, machinery house sections, and electrical systems arrive from fabrication shops and manufacturers by heavy haul truck. A large dragline like the Marion 8750 or Bucyrus 8200 receives component deliveries that span weeks, with each major structural section transported as a multi-permit superload.
When a dragline must be relocated to a new mine — a much rarer event than initial assembly — the machine is completely disassembled into its major structural components and transported piece by piece. Dragline relocation projects are among the most complex and expensive heavy haul undertakings in the mining industry.
Processing Plant Equipment
Mineral processing plants — the facilities where mined ore is crushed, ground, and separated into salable concentrate — use heavy rotating equipment and large pressure vessels that must be transported by highway from fabrication shops to the mine site. Processing plant installations are typically one-time events, but equipment overhauls and liner replacements create recurring transport needs throughout a mine's operating life.
SAG and Ball Mills
Semi-autogenous grinding (SAG) mills and ball mills are the largest rotating equipment in a processing plant. A large SAG mill shell — the cylindrical drum that grinds ore with steel balls and rock — can be 40 feet in diameter and weigh 400,000 to 800,000 pounds as a single fabricated shell section. These shells are typically fabricated in sections at a steel fabrication facility and transported as individual shell sections, each requiring hydraulic platform trailer transport, superload permits, and route surveys to verify that bridges and overhead obstructions can accommodate the load.
Mill trunnions, end walls, and drive systems are transported separately from the shell sections. The girth gear that drives a large SAG mill can be 30 to 40 feet in diameter and weigh 80,000 to 150,000 pounds — a single load requiring an RGN or multi-axle lowboy with overwidth permits in most states.
Crushers and Cone Plants
Primary gyratory crushers used in large copper and gold mines can weigh 500,000 to 1,500,000 pounds in assembled configuration and stand 30 to 40 feet tall. They are transported in major assemblies — mainshaft, spider arm assembly, head, concave liner segments, bowl, and countershaft assembly — each as a separate heavy haul load. Secondary and tertiary cone crushers are smaller and more routinely transported, but large Metso MP1000 and Sandvik CH895 units in the 100,000 to 200,000 lb range still require multi-axle lowboy or RGN transport with overweight permits.
Portable crushing and screening plants that move between quarry sites are among the most common mining equipment transport requests R&RM LLC handles. These plants — jaw crushers, cone crushers, screening decks, and conveyors on wheeled or tracked carrier frames — move frequently between sites and often require overwidth permits for their spreading conveyors and discharge chutes in transport position. See our crushing and screening equipment transport page for model-specific guidance.
Conveyors and Stacker/Reclaimers
Conveyor systems transport ore from the crusher to the mill and concentrate from the mill to the loadout facility. While conveyors are typically installed in sections that can be moved by standard flatbed, oversize situations arise with long idler frames, large head and tail pulley assemblies, and structural support towers. Stacker-reclaimers — the automated machines that stack ore concentrate in a storage yard and reclaim it for shipment — can have boom lengths of 100 to 200 feet and require careful sectioning and heavy haul transport of boom sections, counterweight structures, and travel mechanisms.
Underground Mining Equipment Transport
Underground mining — hard-rock underground mines for gold, silver, copper, nickel, and other metals, as well as coal mines — uses a different fleet of equipment than surface mining. Underground equipment must fit through decline access tunnels or production shafts, which constrains both the size of the machines and how they are transported on public highways.
Underground Loaders and Haul Trucks
Load-haul-dump vehicles (LHDs) and underground articulated trucks are typically the largest pieces of underground mining equipment. A large LHD like the Sandvik LH625i or Cat R3000H can weigh 80,000 to 120,000 pounds, transport at 12 to 14 feet wide in operating position, and require overwidth permits and an RGN trailer to accommodate the articulated frame and low profile. Underground trucks in the 40-to-60 ton class transport similarly to their surface counterparts at the smaller end of the haul truck range.
Underground Drills and Bolters
Face drills, production drills, long-hole drills, and roof bolters used in underground mining are compact compared to their surface counterparts, but larger production machines still require permit attention. A large production drill like the Epiroc Simba E7 in transport configuration can exceed 14 feet in height on its carrier, requiring overheight permits in most states.
Raise Borers and Shaft Equipment
Raise boring machines — used to drill ventilation raises, ore passes, and service shafts between levels of an underground mine — transport as a combination of heavy components: the boring machine body, the reaming head, and the Kelly bar and drill string sections. Large raise borers in the 3-meter to 7-meter bore diameter class require heavy-duty multi-axle trailer transport and oversize permits for the large reaming heads and Kelly bar assemblies.
Where Mining Heavy Haul Moves Happen
Mining operations in the continental United States are concentrated in specific geological regions, and mining heavy haul moves are similarly concentrated:
- Western coal country (Wyoming, Montana, Colorado): The Powder River Basin in Wyoming and southeastern Montana is the most productive coal mining region in the country. Active surface mines at the Gillette Coal Field — including the Belle Ayr, Black Thunder, and North Antelope Rochelle mines — create steady demand for haul truck and shovel transport. See our Wyoming heavy haul page for permit agency contacts and weight corridor information.
- Copper country (Arizona, New Mexico, Nevada): Arizona hosts the largest open-pit copper mines in the United States — Morenci, Bagdad, Ray, Sierrita, and Twin Buttes — and is among the most active states for mining equipment transport. New Mexico's Santa Rita pit (Chino mine) and Nevada's copper and gold districts add to the western mining equipment transport volume. See our Arizona heavy haul and Nevada heavy haul pages.
- Gold and silver districts (Nevada, Montana, South Dakota): Nevada leads the nation in gold production, with major mines in the Carlin Trend, Battle Mountain, and Humboldt counties. The Homestake district in South Dakota and hard-rock gold operations in Montana create additional transport demand in states with challenging mountain highway routes.
- Iron ore and taconite (Minnesota, Michigan): The Minnesota Iron Range — Mesabi, Vermilion, and Cuyuna — and Michigan's Upper Peninsula iron ore district produce the ore that feeds Great Lakes steel mills. Haul truck and shovel transport on Minnesota's Highway 53 and US 169 corridors is a regular occurrence throughout the iron ore shipping season.
- Aggregate quarrying (nationwide): Quarrying for construction aggregate — crushed stone, sand, and gravel — happens in every state. While individual quarry machines are smaller than surface mine equipment, their frequency of movement between quarry sites and the sheer number of operations nationwide makes quarry equipment a significant segment of R&RM LLC's mining transport work.
Permit Requirements for Mining Equipment Moves
Mining equipment generates a higher proportion of superload permit applications than almost any other equipment category. The key thresholds to know:
Standard Oversize and Overweight Permits
Many mining equipment moves fall within the standard oversize and overweight permit process — loads that are too heavy or too wide for legal highway travel but do not exceed state-defined superload thresholds. Standard permit processing typically takes 24 to 72 hours per state, with self-issue options available online in approximately 30 states for routine configurations. Our oversize permit guide covers the standard process in detail.
Superload Permits
Mining equipment frequently exceeds standard permit thresholds — a loaded 175-ton haul truck chassis is a superload in virtually every state. Superload permits require engineering review of the proposed route, including bridge load rating analysis, pavement strength assessment, and in many cases a physical route survey before the permit can be issued. Processing time for superload permits is typically two to six weeks per state for loads in the 200,000 to 500,000 pound range; larger loads requiring bridge engineering may take longer. See our superload permits guide for a complete explanation of the process, engineering documentation requirements, and how to build permit timing into your project schedule.
Special Hauling Vehicles for the Largest Loads
SAG mill shells, electric rope shovel upper works, and dragline structural sections are among the heaviest loads transported by highway in North America. These moves require hydraulic modular platform trailers — Scheuerle, Goldhofer, Cometto, or equivalent — with axle counts of 20 to 40 or more to distribute the load within pavement pressure limits. States regulate these Special Hauling Vehicle (SHV) moves under separate permit authority from standard oversize loads, and some states require SHV operator certification separate from the standard oversize permit.
Planning a Mining Equipment Heavy Haul Move
The information R&RM LLC needs to plan a mining equipment move accurately includes:
- Equipment type and model: The specific machine — Cat 793D, Komatsu PC8000, P&H 4100XPC — allows us to research transport dimensions and typical breakdown configurations
- Transport configuration: Will the machine travel as-assembled, partially disassembled, or as individual major sub-assemblies? For haul trucks, is the body removed? Is the front axle assembly separated?
- Dimensions in transport configuration: Length, width, and height in the configuration the load will actually travel — not operating dimensions, which are typically different and often larger
- Weight: Gross weight per load, and ideally the distribution of that weight across the trailer axles — this determines whether bridge crossings are feasible on the proposed route
- Pickup and delivery locations: Mine site addresses, shop addresses, or port of entry locations, including access road conditions and any known site access constraints
- Timing: Project milestone dates that constrain the transport schedule — mine start-up dates, equipment sale deadlines, or overhaul shop availability windows
With that information in hand, R&RM LLC can assess route options, identify permit requirements, flag bridge or overhead clearance issues on the proposed corridor, and provide an accurate quote with a realistic transport timeline. Call us at (404) 987-6225 or submit a quote request with your equipment details to begin the planning process.
Related Heavy Haul Resources
- Mining Haul Truck Transport — Cat, Komatsu, Liebherr, and Hitachi haul truck transport by size class
- Mining Equipment Transport — shovels, drills, LHDs, and processing plant equipment
- Crushing & Screening Equipment — portable crushers and screening plants that move between mine sites
- Superload Permits Guide — when mining equipment loads exceed standard oversize thresholds
- Multi-State Oversize Permit Coordination — how long-distance mining equipment moves get permitted across multiple states
- Industrial Equipment Transport — R&RM LLC's full-service heavy haul capabilities
- Case Study: Hitachi ZX870 Mining Excavator — Wyoming to Nevada — a real-world example of a mining excavator haul across two states