Tunnel Boring Begins at Superconducting Super Collider
MAR 01, 1993
DOI: 10.1063/1.2808833
The first of the Superconducting Super Collider’s 60‐foot‐wide tunnel‐access shafts opens down into a cavernous magnet‐transfer area 236 feet below the sod of Ellis County, Texas. Some eight thousand 50‐foot‐long superconducting bending magnets will eventually be lowered down such access shafts, arrayed around the 54‐ mile‐circumference underground SSC ring. Just after this picture was taken at the end of December, the first of the SSC’s 250‐ton “inchworm” tunnel borers was lowered down the shaft in segments to begin the actual boring of the 14‐foot‐high SSC tunnel.
© 1993. American Institute of Physics
