OVERALL VIEW OF WEST PORTAL AND GUARDRAIL, LOOKING SOUTHEAST - Zion-Mount Carmel Highway, Tunnel, Two miles east of Zion Canyon Scenic Drive, Springdale, Washington County, UT; Nevada Construction Company; Bureau of Public Roads; Finch, J B; Mitchell, R R; Campbell, K B; Jones, T A; Scott, R N; Gregory, Herbert E; Cement Gun Construction Company; US Geologrical Service; US Bureau of Mining; Crane, W R; Reynolds-Ely Construction Co; Case Construction Company; Shea and Shea; Jurale, James, historian; Fraser, Clayton B, photographer; Anderson, Michael, historian; Grogan, Brian C, photographer

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