Archaeological testing and monitoring in connection with a drainage project at Mission San Juan Capistrano, San Antonio, Bexar County, Texas

The purpose of this project was to obtain information to guide planning to alleviate drainage problems within the compound of the mission. Four separate areas were tested. Of these, only one uncovered structural remains that might be impacted by the drainage swales planned to carry rain water through the east and south walls and away from the standing structures. At that location, careful measurement of comparative elevations of ground and top of wall revealed that the planned drainage would be possible without damage to the wall. Subsequent drainage work was monitored by the archaeologists to be sure that no other previously unknown structures would be disturbed.