- From Tucson.com: Twin Peaks Road in Marana is roughly eight miles long, spanning from the desert valley west of the Tucson Mountains to the Continental Ranch master-planned community. In the near future it will expand over the Santa Cruz River and connect with Interstate 10 as part of a planned freeway interchange included in the recently approved Regional Transportation Plan. But nowhere along Twin Peaks Road can one find a reason for its name. That's because one of the two peaks has been slowly carved away for 57 years. The land where both peaks used to lie, two miles south of Twin Peaks Road and a mile east of North Sandario Road, is part of a 640-acre plot owned by Arizona Portland Cement Co., which has its main plant on the west side of I-10 north of Avra Valley Road. Plant manager Dave Bittel said Arizona Portland Cement has been mining the easternmost of the two peaks for limestone deposits since 1949. "When I came here in 1972, (the eastern peak) was higher than the one you see now," Bittel said. "We're at about ground level now."
- Shown above is Quarry Road
Map
- Shown above is Quarry Road
Map