fish finder pix help me identify this

[lilmule]

Actually I see several points with close contour sides on one side,and if one eliminates the shore some 10 ft ones minor go right against 16-20.You found that old bridge or part there of and the road you will find more,and in a lake with little difference even a minor one makes a difference.
A 3 ft patch of sand or rocks on a muddy point can be attractive to bass,where there is little change.