Neb. Rev. Stat. § 74-307

Any railroad may construct and carry its tracks across, over, or under any road, railroad, canal, stream, or watercourse when it may be necessary in the construction thereof. In such cases, the railroad shall construct its railroad crossings so as to not unnecessarily impede the travel, transportation, or navigation upon the road, railroad, canal, stream, or watercourse so crossed. The railroad may change the channel of any stream or watercourse whenever it may be necessary in the location, construction, or use of its road if it does not change the general course of the stream or watercourse or materially impair its usefulness.