Los Angeles County Relief Administration (LACRA) workers build a 24 mile long Bell sewer, 12 deep in Los Angeles, California. They dig and brace the sides of the trench using pounded stakes. They add a gravel bed and then lay pipes into the trench. Engineers gather to inspect the pipe, led by LACRA chief engineer Ralph Smith. By hand, workers operate a giant pump handle with a massive hook on the end, which pulls massive timbers from deep buried positions along the line of the trench.
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