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Item Title
Wawona Tunnel, Wawona Road through Turtleback Dome, Yosemite Village, Mariposa County, CA
LocationWawona Road through Turtleback Dome,
Yosemite%252525252525252525252525252525252525252525252525252525252BVillage, CA
Find maps of Yosemite%252525252525252525252525252525252525252525252525252525252BVillage, CA
Created/Published
Documentation compiled after 1968.
Notes
Survey number HAER CA-105
Unprocessed field note material exists for this structure (N93).
Building/structure dates:
1931 initial construction
Significance: The longest vehicular tunnel in the western United States at the time of construction, the Wawona Tunnel is significant for minimizing the negative effects of road construction on the Yosemite landscape.
Subjects
TunnelsTransportationTourism
Related Names
Tolen, Harry S.
Roach, T. M.
Bureau Of Public Roads
Hewes, Dr. L. E.
Sweetser, C. H.
Brown, Levant
Grogan, Brian, Photographer
Quin, Richard H., Historian
Collection
Historic American Engineering Record (Library of Congress)
Contents
Photograph caption(s):
1. WEST PORTAL. THIS PORTAL IS AN EXPOSED CONCRETE VAULT; CONTRAST WITH 'NATURAL' WEST PORTAL IN PHOTO #12.
2. CONSTRUCTION DETAIL WEST PORTAL SOUTHWEST CORNER. NOTE AIR RAID SHELTER SIGN.
3. CONSTRUCTION DETAIL WEST PORTAL SHOWING CONCRETE LINING. NOTE DRILL HOLES IN GRANITE AT RIGHT EDGE. US GEOLOGICAL SURVEY BENCHMARK AT BOTTOM CORNER OF SIDEWALK - 4,621 FEET. SLOT IN FAR WALL FOR SEMAPHORE OF OBSOLETE CARBON MONOXIDE WARNING SYSTEM.
4. NINE-FOOT VENTILATION FANS, MIDDLE ADIT.
5. VENTILATION FANS AND ELECTRICAL TRANSFORMERS, MIDDLE ADIT.
6. VIEW OF MIDDLE ADIT AND VENTILATION FANS FROM ADIT OPENING INTO TUNNEL.
7. INTERIOR VIEW OF TUNNEL FROM JUNCTION OF MIDDLE ADIT LOOKING WEST.
8. INTERIOR VIEW FROM JUNCTION OF MIDDLE ADIT LOOKING EAST SHOWING CONCRETE LINING.
9. CONSTRUCTION DETAIL AT MIDDLE ADIT JUNCTION. ADIT AND FANS ARE TO RIGHT.
10. CONSTRUCTION DETAIL AT MIDDLE ADIT JUNCTION. ADIT AND FANS ARE TO LEFT.
11. DETAIL SHOWING JUNCTION OF MIDDLE ADIT TO LEFT AND VIEW EAST THROUGH TUNNEL.
12. EAST PORTAL OF TUNNEL.
13. DETAIL OF EAST PORTAL.
14. LONG VIEW OF EAST PORTAL WITH EDGE OF ESPLANADE TO RIGHT.
15. INTERIOR VIEW OF EAST PORTAL SHOWING DRILL HOLES AT LOWER LEFT AND DRILL MARKS IN CEILING.
16. VIEW OF WAWONA TUNNEL ESPLANADE (DISCOVERY VIEW) FROM ABOVE EAST PORTAL.
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