We have held that large ponds are owned by the State in trust for public use up to their "natural mean high water mark." See, e.g., Allen v. Wetlands Board, 133 N.H. 379, 380, 577 A.2d 92, 93 (1990); State v. Stafford Company, 99 N.H. 92, 96-97, 105 A.2d 569, 572-73 (1954). Moreover, we have noted that "[t]he law of public waters is presumably uniform, and on many questions it is not material whether an authority relates to tide-water or to large ponds."