It is located in the upper third of the river's main valley, which is located between Nimitz Hill Annex and Agana Heights, and lies below and west of the Libugon scenic overlook on Nimitz Hill.

The dam, built in 1910, was part of the first organized effort by the United States Navy to provide a reliable water supply to the island's major settlement, Hagåtña (formerly Agana).

[2] The dam was listed on the National Register of Historic Places in 2014.

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