CPE Rebuild Facility

10/20/11

CPE

Cloud Peak Energy (CPE) is one of the safest producers of low

sulfur, high quality, subbituminous coal in the United States.

Headquartered in Gillette, Wyoming, CPE owns three Powder River

Basin coal mines. Antelope and Cordero Rojo Mines are located in

northeast Wyoming and the Spring Creek Mine is located in

southeast Montana near Decker.

With over 1,500 employees, the company works to create the most

sustainable value from its resources and relationships and is widely

recognized for exemplary performance in its safety and

environmental programs.2

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Background

In 2005, the old Rojo Mine maintenance facility, on Cordero

Rojo Mine, was converted into a rebuild facility. The facility

repairs haul truck beds, dragline buckets, shovel dippers,

rigging and track dozer undercarriages and idlers. Repairs

include bushing, cutting edge, and wear plate replacement,

fatigue and crack repair, and machining and wear build-up. All

of these require extensive manual welding in dynamic

conditions.

CONFIDENTIAL

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Need for New Facility

CONFIDENTIAL

The current facility was designed for maintenance

to the mine’s large equipment. Since it’s design,

surface mine equipment has increased in size

substantially. Also, the facility is running at full

capacity with projections showing an increase in

work demand. Both of these, along with the fact

that the facility was not designed for extensive

welding have justified the need for a new rebuild

facility.

5CONFIDENTIAL

Truck Bed Bay

These aren’t oompa loompas

This haul truck bed can hold 240 tons of coal. The largest bed in the world is in operation at a surface mine in Wyoming and can hold 447 tons of coal.

This bed only has 1 to 2 feet of clearance from the overhead door frame when pulling in and out of the bay.

6CONFIDENTIAL

Bucket and Dipper BaysThe picture to the left is of a dragline bucket. This bucket holds 86 yards of dirt. The dragline is used to remove earth to expose the coal tract. The picture below is of a shovel dipper. This dipper holds 77 yards of material. Dippers are used to shovel dirt or coal into haul truck dump bodies.

Weights of the buckets and dippers exceed current overhead crane capacities. The current method to position these in the shop is to roll them around in the dirt with a really large dozer until they are properly positioned. Then, the dozer pushes them into the shop and the crane lifts them one corner at a time to insert the stands.

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Undercarriage, Rigging and Idler Bay

CONFIDENTIAL

The two photos on the left show undercarriage and idler repair bays. The top right picture is of rigging for draglines and buckets. This is the small equipment.

Same thing, one’s just prettier.

Design Deliverables

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CPE is looking for a complete facility and yard layout which should include the following:

• Production area

• Raw material

storage

• Equipment storage

• Laydown yard

• Parking

• Offices

• Lunchroom

• First aid room

• Change rooms

• Restrooms

• Wash bay

• And anything I

missed

Contact Person

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Jon Larsen

Health and Safety Representative

Office Phone: 307-685-4689

Mobile Phone: 307-622-0793

Email: Jonathan.Larsen@cldpk.com

SDSM&T IE Graduate May 2010 and Dr. Jensen’s favorite

student.Go Ducks!!!

Go Ducks!!!Go Ducks!!!

Go Ducks!!!