What defines a navigable stream in legal terms?

A navigable stream is defined legally as a body of water that is designated as a public highway of water, which is owned and maintained by the government. This definition is significant because it establishes public rights of passage and the general use of navigable waters, which are accessible for transportation and commerce. The legal designation serves to enhance the utility of these waterways, allowing the public to engage in activities such as fishing, boating, and other recreational uses without infringing on private property rights, as these streams are considered part of the commons.

The other options do not accurately capture the legal definition of a navigable stream. A stream that is not affected by weather conditions does not pertain to navigability, as navigability relates more to the stream's ability to be used for commerce and transport rather than its weather resilience. A stream where property lines are undefined does not imply navigability, as the legal concept of navigability has more to do with public use and accessibility than property delineation. Lastly, a stream that can only be crossed at certain points implies limited access, which contradicts the nature of a navigable stream being open for public use along its entire course.