An unknown operator at Santa Ana River #1 Hydro Plant manually controlling the governor

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  An operator at Lombard Governor #4 at the Santa Ana River #1 Hydro Plant

  Visual Materials

  An operator [Ben Pearson] at Lombard Governor #4 at the Santa Ana River #1 Hydro Plant, [demonstrating the operation of the Lighthipe Automatic Governor.]

  photCL SCE 02 - 02685

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  B.F. Pearson standing by a generator at Santa Ana River #1 Hydro Plant

  Visual Materials

  B.F. Pearson standing by a generator at Santa Ana River #1 Hydro Plant while he was an operator at that plant in 1899.

  photCL SCE 01 - 00387

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  Believed to be an operator's cottage at Santa Ana River #1 Hydro Plant

  Visual Materials

  Believed to be an operator's cottage at Santa Ana River #1 Hydro Plant.

  photCL SCE 01 - 00566

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  The switchboard in the power house at Santa Ana River #1 Hydro Plant

  Visual Materials

  The switchboard in the power house at Santa Ana River #1 Hydro Plant, [showing an operator at his desk.]

  photCL SCE 02 - 01199

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  Operator Taylor standing on the summit of the peak opposite the power house at Santa Ana River #1 Hydro Plant

  Visual Materials

  Operator Taylor standing on the summit of the peak opposite the power house at Santa Ana River #1 Hydro Plant.

  photCL SCE 01 - 00944

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  The intake for Santa Ana River #2 Hydro Plant in front of Santa Ana River #1 Hydro Plant

  Visual Materials

  The intake for Santa Ana River #2 Hydro Plant in front of Santa Ana River #1 Hydro Plant, showing the San Bernardino Mountains in the background.

  photCL SCE 01 - 00147