Vallecito Dam Construction Project

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: Close-up of test pit wall; Close-up of one awl of test pit excavated in No. 1 zone of embankment at station 22+25, 97 feet upstream from axis of dam. Purpose of pit was to determine percentage of plus 5-inch stones remaining in materials., Original photo number: Pine R - 126

: Close-up showing installation of piezometer tip; Close-up showing installation of piezometer tip at station 11+75. 45 feet upstream from axis, elevation 7640., Original photo number: Pine R - 120 a, b, & c

: Cofferdam construction at temporary diversion channel; Constructing cofferdam at upstream end of temporary diversion channel. Material used is waste from required excavation. Refer to Pine R - 266., Original photo number: Pine R - 370

: Compacted embankment; Compacted embankment with mechanical tampers along cut-off wall between axis stations 39+98 and 40+40. Refer to Pine R - 312, 316, 317. Lean concrete in background forms foundation for left inlet wall of spillway between stations 5+29 and 5+84., Original photo number: Pine R - 393

: Compacting embankment; Compacting embankment adjacent concrete cut-off wall, with air-operated sheet-piling hammers., Original photo number: Pine R - 152

: Compacting embankment material; Sheeps-foot roller compacting upstream No. 2 material at station 20+25, 30 ft. upstream from dam axis. The moisture content of this material is approximately 1.5% below optimum moisture., Original photo number: Pine R - 090

: Completed additional cut-off trench; End of completed additional cut-off trench at axis station 19+50, taken from station 18+25. Refer to Pine R - 190., Original photo number: Pine R - 101

: Completed excavation for foundation; Completed excavation for placing lean mass concrete foundation under spillway inlet wall at left side, station 5+30 to 5+84. Note key trenches excavated in rock. Embankment cut-off wall in foreground will be extended to the mass concrete. Refer to Pine R - 303., Original photo number: Pine R - 381

: Completed expansion joint; Completed expansion joint in spillway floor. Refer to Pine R - 358 and 359., Original photo number: Pine R - 372

: Concrete batching and mixing plant; Concrete batching and mixing plant. Cement storage warehouse at left., Original photo number: Pine R - 452

: Concrete cut-off wall on left abutment; Concrete cut-off wall on left abutment. Portion of cut-off trench in foreground has been refilled, covering the wall. Refer to Pine R - 160., Original photo number: Pine R - 306

: Contractor constructed rock rake; Rock rake constructed in the contractor's shops. Each tooth is adjustable for depth. Spacing can be changed by removing teeth., Original photo number: Pine R - 247

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