N.Y. Navigation Law § 120: Dams and bridges

§ 120. Dams and bridges. No dam shall be erected on any river or

stream in this state, recognized by law or use as a public highway for

the purpose of floating and running lumber, logs or other timber, over

or upon the same, unless there be built in such dam an apron, at least

fifteen feet in width, in the middle of the current of such river or

stream, of a proper slope for the safe passage of lumber, logs and other

timber. No bridge shall be built over any such river or stream in such a

manner as to obstruct or prevent the free and uninterrupted passage of

lumber, logs and other timber down and along such river or stream.