Photograph inside a mining tunnel (owned by Columbine metals) in Lawson, Colorado, taken for the I-70 project before the interstate was built. Shows tracks and support beams. Sign reads "Proj. I 70-3-7 Parcel [no number listed]."
Photograph inside a mining tunnel (owned by Columbine metals) in Lawson, Colorado, taken for the I-70 project before the interstate was built. Shows tracks and support beams. Sign reads "Proj. I 70-3-7 Parcel [no number listed]."