Water Monster reports in Nebraska
3 cases, best-documented first. Page 1 of 1.
We map claims, not creatures. A case is what some source says someone saw or heard, with the link to that source. It is not proof that anything was there, and a retelling counts once, not as a second sighting.

Water Monster · Hay Springs, Nebraska · 1922
J. A. Johnson reports that he and two friends saw a large, horned alligator-like creature in Big Alkali Lake last fall.

Water Monster · Hay Springs, Nebraska · 1925
Bruce Hewett and J. A. Mayes claim to have captured a sea monster in Alkali Lake which turned out to be a mermaid.

Water Monster · Niobrara, Nebraska · 1923
A county treasurer reportedly saw a creature in the Niobrara river with the body of a fish and the head of a human.