An Ancient Maya Reservoir and Dam at Tamarindito, El Peten, Guatemala

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Abstract
We report a Prehispanic dam and remnants of a small reservoir at the ancient Maya site of Tamarindito in the Río de la Pasión region of Guatemala's Petén district. The remnants of the dam are on the Petexbatún escarpment, to the east of the main site in the midst of an area of residential groups and numerous and varied agricultural terracing. The dam was about 60 m long and would have held a reservoir of about 2,000 m3. This volume of water was sufficient to irrigate nearby terraced fields. The dam and reservoir probably date to the Late Classic period (A.D. 550-800), a period during which Tamarindito was involved in regional warfare. In addition to producing irrigation water, we hypothesize that the system was built to provide a supplemental, more defensible, residential water supply and to protect a spring located below the dam.