The Labrador / Shepherd mix was found caked in mud along the shoreline chained to a 12x12" cinderblock "presumably left to drown in high water levels," the Great Plains SPCA said in a statement.
Rangers quickly rescued the animal and he is now recovering at the Great Plains SPCA's Independence shelter.
Officials believe the dog, now named Deputy, is between 5 and 7 years old.
Anyone with information is urged to contact Jackson County Animal Control at (913) 475-6164.
Great Plains SPCA tweeted a photo of Deputy on Monday afternoon.