Complex sentence: The Medina Irrigation Company (MICO) originally built much of the community as a workers camp, to house the approximately 1500 Mexican laborers (and their families) who constructed Medina Dam, the fourth largest in the United States at its completion in 1913.
Split into simpler sentences: The Medina Irrigation Company (MICO) originally built much of the community as a workers camp, to house the approximately 1500 Mexican laborers (and their families) who constructed Medina Dam. It was the fourth largest dam in the United States at its completion in 1913.