This cistern was located in a private residence just a few doors over from the restaurant from site A. This was another deep cistern, with about 7 feet of water. Although the water in this cistern was fairly clear, there was a lot of silt that had accumulated at the bottom which made driving around difficult. Overall, this cistern had a large oval shape, and is thought to be around 500-600 years old. A short video of what the robot saw during the 2009 expedition can be found here.
Shown below is the sonar data image, a top view of the mapped image (0.20m grid cell resolution) and a 3D view of the mapped image (0.05m grid cell resolution).
California Polytechnic State University
Marine Resources Development Foundation