Vallecito Dam Construction Project Archive Search Results
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Looking downstream in outlet conduit from sta. 6+75. Concrete has been placed in the invert of the trashrack and transition.
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Excavation for outlet conduit, looking downstream from station 6+00. Bulldozer in foreground is cleaning off bedrock.
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Rock excavation for trashrack structure. Taken from point on rim to left of structure.
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Looking downstream in outlet conduit from sta. 6+75. Two sections of the arch have been placed. Dragline is placing concrete in invert with bottom dump bucket. See Pine R - 74.
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Looking downstream in outlet conduit from station 6+75. Refer to Pine R - 61, 69, 74, & 88.
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Looking downstream in outlet conduit from station 6+75. Refer to Pine R - 61, 69, 74, & 97
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Le Tourneau loading with aid of a pusher in embankment material being removed for additional cut-off trench.
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Downstream face of cut for additional cut-off trench at station 18+00, showing cross-section of embankment placed during 1938, and the source of each type of material.
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Excavating additional cut-off trench through embankment placed in 1938. Taken from point 25 feet upstream from dam axis at station 17+00.
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Looking at upstream face of cut for additional cut-off trench at sta. 17+50.
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Placing forms for outlet works gate chamber, air shaft, and spiral stairway shaft.
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Inside forms and reinforcement in place for outlet works gate chamber and spiral stairway addition
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Looking downstream in outlet works. Placing inside forms for gate chamber. Hand-tamping embankment over conduit seen in foreground.
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Looking toward left abutment in bottom of cut-off trench from point opposite axis sta. 9+00. Note drainage system at left side of trench has been covered with tar paper preparatory to placing embankment. Grout pipes can be seen extending up the side of the trench for grouting the system.
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Looking toward river channel in bottom of cut-off trench on left abutment, showing foundation drainage installation. Drains will carry water to a corrugated metal pipe sump set in a concrete box. Water is being pumped from temporary sump at extreme left during installation.
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Same view as Pine R - 157 after placing of embankment had started. Note mechanical tamping operations along contact at left side and around pump sump.
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Looking toward left abutment in cut-off trench from axis at sta. 9+00. End of concrete cut-off wall is seen in center.
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Looking toward left abutment from axis sta. 20+00. Le Tourneaus are starting excavation for the additional cut-off trench in the foreground.
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Foundation drainage system. Note grout risers at right side of trench for grouting system after embankment has been placed.
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Looking upstream at sump for foundation system from station 8+00.