Vallecito Reservoir (Colo.)--History
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Looking along upstream face of dam toward left abutment from station 24+00. Bulldozer is being used to place riprap after being dumped from trucks. Note small average size of pieces compared with hat in foreground.
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Dumped riprap on upstream face of embankment in the vicinity of station 20+00.
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Dumping riprap from bottom dump Euclid near the top of existing embankment.
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Looking toward right abutment in cut-off trench from sta. 37+00. Embankment is being placed and hand-compacted on each side of the concrete wall.
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View of cut-off trench looking toward the right abutment of the dam from the upstream rim of the cut-off trench opposite station 33+50. Refer to Pine R - 71
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Cut-off trench, looking toward right abutment from sta. 33+50.
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Compacting embankment adjacent concrete cut-off wall, with air-operated sheet-piling hammers.
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Looking toward right abutment in cut-off trench. Part of footing for concrete wall is seen on slope. Wagon drill is working on 50-foot grout hole. Refer to Pine R - 66.
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Cut-off trench excavation looking toward left abutment from a point opposite sta. 27+50. Survey crew is seen working at deepest portion of trench, which was through the sand pocket at station 23+25.
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Placing concrete in cut-off wall opposite station 33+50, looking toward the right abutment. At left center concrete from the pump-crete pipe line is flowing into a hopper from which it is wheeled in buggies to the point of placement.
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Looking toward the right abutment along centerline of the cut-off trench from opposite dam axis sta. 30+50, cut-off wall is completed, and placing of hand-compacted embankment has been started.
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Cut-off trench excavation looking toward left abutment from a point opposite sta. 24+00. The excavation is complete from the transit in foreground to the group standing in bottom of trench.
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Cut-off trench excavation from sta. 20+00 to the river. A small section of embankment is shown in the immediate foreground. The remainder of the trench is being prepared to receive embankment.
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Placing and rolling embankment in the cut-off trench. The cut seen at right center normal to the cut-off trench is the excavation for removal of the sand pocket at station 73+25.
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Excavation for cut-off trench from point near station 21+00 looking toward right abutment.
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Rock excavation for concrete cut-off wall footing, looking toward left abutment from opposite station 3+75.
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Looking along centerline of cut-off trench toward the left abutment from opposite station 9+00.
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Placing concrete for cut-off wall footings at left abutment.
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Rock excavation for cut-off wall footing looking toward left abutment from point opposite axis at station 3+00.
