USGS says that the current flow is 344 CFS. Normal is 184. They probably have three small gates open.
I think some of the stripers went down and some probably came up from Granbury. You should consider taking some small perch hooks and some worms to get some small perch. Drifting through some of the big holes with that might get a nice fish. There are some gar in the Brazos below Pk that would look right at home with Ocean fish. I was with my wife a few years ago when one went under my Sea Eagle and looked like he was almost as long as my boat. Wife freaked when she saw it, but I thought " I'd like to catch that thing".
John 21:3 Simon Peter saith unto them, I go a fishing. They say unto him, We also go with thee.