• Amphibolite zone exposure, Colorado School of Mines Experimental Mine

      A rock exposure of an amphibolite zone is shown with a rock hammer for scale underground at the Edgar Mine. The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • Amphibolite zone exposure, Colorado School of Mines Experimental Mine

      An exposure of an amphibolite zone is shown underground at the Edgar Mine. The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • Back of D-Kt, Colorado School of Mines Experimental Mine

      The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • Backwards canoe, Cardboard Canoe Race, Safar-E-Days 2007

      Three students ride a canoe backwards over rapids in Clear Creek during the Cardboard Canoe Race. A male student floats alongside, along with canoe debris. The 7th Annual Cardboard Canoe Race was held as a part of Safar-E-Days 2007, the E-Days celebration in March at the Colorado School of Mines. Teams built rafts composed of cardboard, duct tape and twine to race in Clear Creek.
    • Base of face, Colorado School of Mines Experimental Mine

      An exposure is shown at the base of the face, ~105' Incline, Edgar Mine. The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • Before the race, Cardboard Canoe Race, Safar-E-Days 2007

      Students gather around teams' cardboard canoes before the Cardboard Canoe Race. The 7th Annual Cardboard Canoe Race was held as a part of Safar-E-Days 2007, the E-Days celebration in March at the Colorado School of Mines. Teams built rafts composed of cardboard, duct tape and twine to race in Clear Creek.
    • Canoes in Clear Creek, Cardboard Canoe Race, Safar-E-Days 2007

      Canoes are shown in Clear Creek during the Cardboard Canoe Race. The lead canoe is painted white and labeled "Creek Crusaders." The 7th Annual Cardboard Canoe Race was held as a part of Safar-E-Days 2007, the E-Days celebration in March at the Colorado School of Mines. Teams built rafts composed of cardboard, duct tape and twine to race in Clear Creek.
    • Canoes tangled, Cardboard Canoe Race, Safar-E-Days 2007

      Two canoes tangle during the Cardboard Canoe Race. The canoe in the foreground is painted white with wavy black stripes. The 7th Annual Cardboard Canoe Race was held as a part of Safar-E-Days 2007, the E-Days celebration in March at the Colorado School of Mines. Teams built rafts composed of cardboard, duct tape and twine to race in Clear Creek.
    • Chlorite schist at face, Colorado School of Mines Experimental Mine

      Chlorite schist is exposed at a face underground at the Edgar Mine. A person positions a tape measure next to the face for scale. The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • Chlorite schist exposure, Colorado School of Mines Experimental Mine

      A woman stands with a measuring stick at an exposure of chlorite schist underground at the Edgar Mine. The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • Class tour group, Colorado School of Mines Experimental Mine

      A K-12 class group and tour guide, probably a student, are shown underground at the Edgar Mine. The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • Colorado School of Mines Experimental Mine

      The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • Colorado School of Mines Experimental Mine

      The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • D Right, amphibolite, Colorado School of Mines Experimental Mine

      An instructor or mine operator uses a rock hammer to point out amphibolite on an exposure underground at the Colorado School of Mines Experimental Mine. A sign on the rock face says, "D Right." The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • D Right, Colorado School of Mines Experimental Mine

      An instructor or mine operator stands on a piece of equipment underground at the Colorado School of Mines Experimental Mine. The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • Disintegrating canoe, Cardboard Canoe Race, Safar-E-Days 2007

      A canoe crewed by five students falls apart as it goes over rapids in Clear Creek at the Cardboard Canoe Race. Other canoes are visible in the background. The 7th Annual Cardboard Canoe Race was held as a part of Safar-E-Days 2007, the E-Days celebration in March at the Colorado School of Mines. Teams built rafts composed of cardboard, duct tape and twine to race in Clear Creek.
    • Dog, Colorado School of Mines Experimental Mine

      A German Shepard dog lays on the floor of one of the buildings at the Edgar Mine. The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • Drill hole, Colorado School of Mines Experimental Mine

      The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • Dugout face at site, Colorado School of Mines Experimental Mine

      A dugout face at a drift is shown underground at the Edgar Mine. A man, probably a student, kneels nearby. The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.
    • Dugout face, Colorado School of Mines Experimental Mine

      A dugout face is shown underground at the Edgar Mine. A man kneels to the side. The Colorado School of Mines Experimental Mine is located in Idaho Springs, Clear Creek County, Colorado. Originally known as the Edgar Mine, it produced silver and gold, and some lead and copper in the 1870s. The Big Five Mining Company leased the Mine to the School of Mines for training in 1921. The School eventually acquired the Mine and additional workings to develop the Experimental Mine as an underground classroom for engineering education and as a research facility. The Edgar's workings include the Miami Tunnel, the Edgar shaft following the old Edgar vein, and the Big Five Tunnel.