Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2471 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2468 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2470 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2469 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 0300 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon pipeline (historic) 0301 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 0302 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2408 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2409 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2410 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2411 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2412 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2413 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2414 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2415 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2416 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2417 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2419 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2473 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2474 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2475 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2476 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 2477 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 0315 Silver Bridge
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 0314 Silver Bridge Construction
Grand Canyon NPS:
Trans-canyon Pipeline (Historic) 0313 Helicopter Transport