Vallecito Reservoir, Colorado
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Installation of copper tubing for piezometer connections at elevation 7640, sta. 11+75. Camera is about 53 feet downstream from axis.
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Installation of piezometer tips and copper tubing in No. 3 embankment in old river channel. Note back-filling over copper tubing, using fine screened clay to prevent crushing of tubing by rocks.
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Close-up showing installation of piezometer tip at station 11+75. 45 feet upstream from axis, elevation 7640.
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Installation of piezometer tips and copper tubing in No. 3 embankment in old river channel. Trenches are excavated anc backfilled by hand.
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Looking toward right abutment from axis sta. 0+00. (Photographic Point No. 3). Average elevation of embankment in foreground is 7615. Refer to Pine R - 228 and note that stockpile (Material excavated from cut-off trench), seen at left foreground has been removed.
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Looking along axis toward right abutment from station 0+00. (Photographic Point No. 3). Average elevation of embankment is 7649.
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Looking along axis toward right abutment from sta. 0+00. (Photographic Point No. 3). Average elevation of fill 7660. Refer to Pine R - 383.
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Looking toward right abutment from sta. 0+00. (Photographic Point No. 3). Average elevation of embankment in foreground is 7626. Embankment placing operations have been suspended for this season. Refer to Pine R - 244.
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Looking along axis toward right abutment from sta. 0+00. (Photographic Point No. 3). Note excellent condition of embankment for hauling, also dust raised by vehicles.
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Looking toward right abutment from axis, station 0+00. (photographic Point No. 3). Note excellent condition of embankment for hauling equipment.
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Rolling semi-impervious section of embankment. Looking towards right abutment from a point 130 feet downstream from station 30+50
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Looking toward left abutment from top of concrete mixing plant. Smoke is caused by clearing operations on left side of river. Material being rolled in foreground is the semi-pervious (No. 3) section of the dam.
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Looking down into piezometer terminal well, showing pump, valves, and gauge. Refer to Drawing No. 191-D-227, Test apparatus installation.
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Looking along axis toward right abutment from sta. 0+00. (Photographic Point No. 3). Cutoff trench excavation in right foreground is nearly completed. Refer to Pine R - 132.
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Looking toward right abutment from sta. 0+00 on axis of dam. Stripping is shown complete on left abutment.
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Looking toward right abutment from axis station 0+00. (Photographic Point No.3).
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Looking toward right abutment from axis sta. 0+00 (Photographic Point #3)
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Looking toward right abutment from axis sta. 0+00. (Photographic Point No. 3). The three zones of Earth embankment are clearly defined by the different shades of material. Beginning with the dividing the light and dark material in the center of dam, to the right is the upstream (or mixed) No. 2 section grading into the No. 1; to the left Is the downstream (clay) No. 2 section grading into the No. 3 section where the roller is seen working at left....
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Looking toward right abutment from axis sta. 0+00 (Photographic Point No. 3). Note rock-rake at left foreground pushing oversize rock from No. 3 material into cobble fill. Refer to Pine R - 237.
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View of dam looking along axis toward right abutment from sta. 0+00. (Photographic Point No. 3).
