US 550 Red Mountain Project (# 0304) US 550 Red Mountain Project (# 0306) US 550 Red Mountain Project (# 0309) US 550 Red Mountains (# 0312) Clarkdale, AZ copper history (# 0491) Clarkdale, AZ copper history (# 0490) Clarkdale, AZ copper history (# 0493) US 550 Red Mountain Project (# 0300) US 550 Red Mountain Project (# 0299) US 550 Red Mountain Project (# 0298) New Elk Coal Co (# 0066) New Elk Coal Co (# 0065) Cokedale Historic Dist, CO slag pile (# 0064) Cokedale Historic Dist, CO wash plant (# 0063) Cokedale Historic Dist, CO coking ovens (# 0062) Cokedale Historic Dist, CO miner memorial (# 0055… Cokedale Historic Dist, CO slag pile (# 0055) Ludlow, CO labor monument (# 0046) Ludlow, CO labor monument (# 0044) Ludlow, CO labor monument (# 0043) Ludlow, CO labor monument (# 0041) Ludlow, CO labor monument (# 0039) Ludlow, CO labor monument (# 0038) Santa Rita, NM Chino Mine (# 0810) Santa Rita, NM Chino Mine (# 0806) Santa Rita, NM Chino Mine (# 0809) Santa Rita, NM Chino Mine (# 0803) Silver City, NM / Chino mine (#0 800) Tyrone Mine, NM (# 0792) Tyrone Mine, NM reclamation (# 0790) Tyrone Mine, NM reclamation (# 0789) Osceola, NV (#1247) Osceola, NV (#1246) Osceola, NV (#1245) Ward Charcoal Ovens (#0619) Ward Charcoal Ovens (#0618) Ward Charcoal Ovens circa 1995 Utah US-191 oil (#0065) Flaming Gorge Simplot phosphate mine UT (#0063) Flaming Gorge Simplot phosphate mine UT (#0064) Flaming Gorge Simplot phosphate mine UT (#0061) Flaming Gorge Simplot phosphate mine UT (#0057) Flaming Gorge Simplot phosphate mine UT (#0058) Flaming Gorge Simplot phosphate mine UT (#0056) Flaming Gorge Simplot phosphate mine UT (#0052) South Pass City WY Carissa Mine (#0015) South Pass City WY Carissa Mine (#0014) South Pass City WY Carissa Mine (#0012) Atlantic City WY Duncan Mine (#0009) Atlantic City WY (#0008) Atlantic City WY (#0006) Atlantic City WY (#0005) Berlin-Ichthyosaur State Park, NV (0745) Berlin-Ichthyosaur State Park, NV (0744) Berlin-Ichthyosaur State Park, NV (0743) Berlin-Ichthyosaur State Park, NV (0742) Berlin-Ichthyosaur State Park, NV (0739) Berlin-Ichthyosaur State Park, NV (0738) Berlin-Ichthyosaur State Park, NV (0734) Berlin-Ichthyosaur State Park, NV (0732) Berlin-Ichthyosaur State Park, NV (0730) Berlin-Ichthyosaur State Park, NV (0728) Berlin-Ichthyosaur State Park, NV (0725) Berlin-Ichthyosaur State Park, NV (0724) Berlin-Ichthyosaur State Park, NV (0723) Berlin-Ichthyosaur State Park, NV (0721) Berlin-Ichthyosaur State Park, NV (0719) Berlin-Ichthyosaur State Park, NV (0716) Berlin-Ichthyosaur State Park, NV (0715)