The ornamental design for a rail mounted waterfall, as shown and described.
FIG. 1 is a top front perspective view of a rail mounted waterfall illustrating railing (shown in dashed lines), post supports for a railing exit aperture, a glass panel and a basin.
FIG. 2 is a bottom front perspective view of the rail mounted waterfall of FIG. 1.
FIG. 3 is a front side view of the rail mounted waterfall of FIG. 1.
FIG. 4 is a back side view of the rail mounted waterfall of FIG. 1.
FIG. 5 is a right side view of the rail mounted waterfall of FIG. 1.
FIG. 6 is a left side view of the rail mounted waterfall of FIG. 1.
FIG. 7 is a bottom side view of the rail mounted waterfall of FIG. 1.
FIG. 8 is a top side view of the rail mounted waterfall of FIG. 1; and,
FIG. 9 is a front view of the rail mounted waterfall illustrating water from the waterfall flowing down the glass panel into the basin.
In the drawings, the dash-dash broken lines show environmental subject matter that forms no part of the claimed design. The dot-dash lines represent unclaimed boundaries and form no part of the claimed design. FIG. 1 is shown with a symbolic break in its width and length. The appearance of any portion of the article between the break lines forms no part of the claimed design.