Vallecito Reservoir (Colo.)--History
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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.
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Excavation of additional cut-off trench looking toward right abutment from axis sta. 16+50. Right side of cut is in primary cut-off trench placed in 1938. Shovel is working in original foundation material. Refer to Pine R - 182.
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Excavation for additional cut-off trench, looking toward right abutment from axis station 16+75. Excavation is complete and bottom of trench is a minimum of 6 ft. into glacial till. Refer to Pine R - 188.
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Placing embankment in additional cut-off trench. Looking toward right abutment from axis station 15+75.
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End of completed additional cut-off trench at axis station 19+50, taken from station 18+25. Refer to Pine R - 190.
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Downstream side of additional cut-off trench showing sand pocket. Taken from axis at station 15+75.
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Excavation for additional cut-off trench, looking toward left abutment from axis sta. 14+90. Excavation is practically complete. Junction with secondary cut-off is at rear end of shovel. Refer to Pine R - 183.
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Looking downstream in inlet channel to outlet works from outlet works station 4+50, note 3 to 1 slope directly behind trashrack which will be riprapped.
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Looking downstream in outlet conduit from sta. 6+75. showing placing of compacted embankment over conduit. Refer to Pine R - 134.
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Placing forms and reinforcement for gate chamber and addition to spiral stairway shaft.
