This seems like a different area on the same road:
"After the Texas Department of Public Safety searched the
area of 4700 Salt Flat Road outside Luling, where Landry’s Nissan Altima
was found wrecked and abandoned Dec. 14, DPS handed the investigation to Caldwell County, Sheriff Daniel Law said."
[...]
"Crews have searched more than 20,000 acres using “every possible means to search,” Law said. He said crews have covered nearly 4,000 acres by foot, horse and dogs and almost 17,000 acres using drones and helicopters.
Law said the sheriff’s office has received numerous tips about where Landry could possibly be, and they are investigating all of them."
There are also a few pictures of the search area, including a pond:
Search for missing Texas State student continues 9 days after disappearance | KXAN Austin