SAN ANTONIO, TEXAS—Waterway features dating to the Spanish colonial period have been unearthed in Brackenridge Park. The dam, built in 1719, is the oldest to be unearthed in the city. Its irrigation waterways served the Mission San Antonio de Valero, which was moved further north after a hurricane in 1724. This is “one of the most concentrated groupings of acequia features [to be found] in the past 10 or 15 years,” said Kay Hindes, city archaeaologist.