In case anybody cares and they don't want to rip a hole in their boat big enough to sink it.
This map is set 23' low, the white area is currently out of the water (dry land now). Don't go by the contour depths # written because they aren't right, subtract 23' from them and that's the depth. Stick these into your graph with some kind of hazard icon.
Choke canyon hazards, these gps coords aren't exact but they are pretty close.
N 28 29.487 (old iron well head #48 on the map)
W 98 20.755'
N 28 29.553'
W 98 20.124' (concrete tower/windmill stand??, boat sinker! #17 on the map)
N 28 28.029' (concrete chunks with rebar sticking out, approx area, Naylors Pond dam)
W 98 15.957'