Wachusett Reservoir, North Dike, easterly portion, main cut-off trench, section through large kettle at station 19+00, looking northeast, Clinton, Mass., Nov. 13, 1898

Wachusett Reservoir, North Dike, easterly portion, main cut-off trench, section through large kettle at station 19+00, looking northeast, Clinton, Mass., Nov. 13, 1898

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