“Edward Hubbard, Seattle Flyer, Plunges Into Lake in Navy Plane, Escapes Death”
(click to enlarge)
Noted comment within article: “The seaplane, badly damaged, was towed to shore.”
It is unlikely any substantial portion of this aircraft remains in the lake. But I would expect that as a result of crashing nose first into the water at a high rate of speed (from a fall that originated at 4000 ft) at least some of the wreckage remains in the lake.