Thanks for all the responses, this is why GCA remains a great site. I particularly enjoyed this from Ari Techner's review, for those who did not read it:
The course is built on what was an active landfill until the mid 1960s. From the time the landfill closed until they started working on the course in 2014, it was used as an unauthorized dump site for many of the local citizens of South Dallas. You could find all kinds of things on the site including large appliances and boats… there was even an old car on what is now the 17th green.
Building the course was quite the undertaking due to the unique traits of the land. The entire site was capped by the U.S. Army Corp of Engineers with an impenetrable cap, preserving the natural humps and rolls of the property. Then the entire property was covered with a minimum of 2 feet of sand. Due to the cap over the ground, Coore and Crenshaw could not dig down into the ground at all when building the course — they had to build up instead. They basically had to identify the lowest point of the lowest bunker floor and build the entire course up from there. They also could not plant any trees.
A new strain of grass was also invented just for the course and the desired firm and fast conditions. Being located in Dallas, the developer and designers knew that the normal warm weather Bermuda or Zoysia would not provide the desired conditions. So they invented what is now called Trinity Zoysia, which is a shallow root Zoysia hybrid that comes very close to imitating the seaside Fescue playing surfaces you see on true links courses.