Vallecito Reservoir, Colorado
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Inlet channel to outlet conduit, looking downstream. Structure seen in center is the concrete mixing plant.
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Excavating in bedrock at upstream right hand corner of trashrack structure.
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Excavating rock for foundation for the trashrack structure.
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Looking downstream in outlet conduit from sta. 6+75. The conduit is being covered with 3 feet of loose earth to protect it from freezing. The earth is being placed by the contractor and will be removed in the spring, at his own expense. Refer to Pine R - 97.
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Looking downstream in outlet conduit from station 6+75. Note backfilling operations. Refer to Pine R_ 61, 69, 74, 88, 97, 107, & 124.
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Looking along center-line of cut-off trench toward left abutment, from a point opposite sta. 27+50. The location and angel of view is approximately the same as to Pine R - 32, 39, and 55.
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Looking along left abutment cut-off trench toward right abutment from opposite station 3+00 (Dam axis). Note rock excavation for concrete wall footing in middle foreground and seepage near foot of slope on the right.
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Looking toward left abutment in bottom of cut-off trench from station 9+70. Note sand deposit on each side of trench.
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Placing embankment in cut-off trench at intersection with temporary diversion channel.
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Looking downstream in outlet conduit from sta. 6+25. Completed excavation for trashrack structure in foreground; grout mixer and pump near center; concrete chute at right.
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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.
