"After our investigation, we felt the Pegson and Powerscreen equipment was better engineered and built than the other brands we had investigated," says Steiner. "It is more solid, more efficient and has a great reputation for efficiency and reliability in continuous, long-term use in tough applications like ours. What's more, the two brands are designed to work together in perfect unison."
In addition, with the Terex Pegson Automax tracked cone crusher, no screen plant is needed between the jaw and the cone. "The primary jaw feeds directly into the secondary cone," Wiebelhaus points out. "It saves you from buying or renting and maintaining an extra screening plant, and eliminates a step in the production process, which speeds up the whole operation."
Eland purchased two Pegson-Powerscreen crushing, screening and radial stacker systems. "The first system went on stream in July 2004 and the second some months later. Both have run exceedingly well ever since," says Steiner. "We work eight- to 10-hour days Monday through Friday. And everything runs smoothly."
Setting up shop
Stimpel-Wiebelhaus located its rented crushing/screening system within the bypass right-of-way to crush as much rock as possible (60,000 tons) for road base. It primarily produced Class 2 (3/4-in. minus) road base, plus structural backfill (SBF) material.
Its system consisted of a Pegson 26x44 Premiertrak jaw plant feeding a Powerscreen Warrior 1800, which produced SBF and also fed a Pegson 1300 Maxtrak cone. The 1300 cone fed a Powerscreen Chieftain 1800 dry screen that operated in closed circuit with a Pegson 1000 cone and fed Class 2 road base to two Powerscreen radial stacking conveyors.
Excess rock was then hauled to Eland's crushing and screening operation, located on leased land outside the bypass right-of-way adjacent to the highway.
Its basic system consisted of a Pegson 26x44 jaw feeding a 1300 cone, which fed a Chieftain 1800 screen. The Chieftain operated in closed circuit with a Pegson 1000 cone, and fed Class 2 base rock to two Powerscreen radial stackers, which stockpiled material. The stackers also fed a Chieftain 2400 screen plant capable of producing a number of different size products simultaneously, including SBF, 3/4-in. drain rock, 1/2-in. drain rock and Amador County Water Agency spec sand.
Eland has used some of the material for its own building and road construction purposes. The remainder is now available for sale.
"We've kept most of the crushed rock on site until the bypass was completed," Steiner says. "Now it can be sold to third parties and hauled away on the bypass instead of over the rural roads. We have more than 500,000 tons of processed rock material. When all the crushed rock is sold and gone, the land can be used again as the owner wishes."