I have this on my email under ramp levels. Hasn't been updated in a few years.
Grenda ramps


Bryant..............................210.5
Choctaw...........................195.5
Grenada Landing.................194
Hugh White State Park.........195
Gums Crossing....................208.5
North Abutment..................207.0
North Graysport..................209.5
Piney Woods......................207
Skuna-Turkey.....................211
South Outlet......................156.0
South Outlet Old River Run....159.0
South Graysport..................202
Torrence Landing.................196
Upper Yalobusha..................211.5
Wolf Creek..........................195
Young's Landing...................191.0 but you can't go anywhere, 100 yards down stream, couple hundred upstream.