Neb. Rev. Stat. § 31-202.02: Neb. Rev. Stat. § 31-202.02

Whenever any natural watercourse in a county is filled with trees, silt, or debris in such a manner as to obstruct the natural flow thereof and cause damage by flooding of adjacent lands, any five landowners owning land in such county abutting on the natural watercourse may, by petition, request the county board to cause same to be cleaned out and rendered free of obstructions.