Clamshell shovel, Sebago Lake, 1924
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Workers used a steam-powered clamshell shovel to dig a new water intake and conduit system. The system ran from Sebago Lake to the Portland Water District reservoir. Construction started in 1924, in order to provide adequate water for residents from Biddeford to Brunswick. Designers increased the depth of the new intake from several feet to 30 feet, and moved it out 1600 feet from the shore. This change ensured sufficient water delivery even when the lake was low.
The December 9th edition of the "Portland Evening Express" devoted a full-page article to the project.
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