I was further thinkin' back... I know they were already into the Ben White construction when I married Myranda's dad cause he had an aunt and uncle living out toward Del Valle. We would have to go out Ben White from Lake Travis to get to their house. That puts the construction pre-'83.
The weird thing is how it just *never* gets finished. They tear up parts that they just finished to do new stuff. It doesn't look like any kind of planning goes into it!