. Annual report of the Regents. New York State Museum; Science. REPORT OF THE DIRECTOR rl47. Laying off vertically the 30 feet elevation of Six Mile creek and the 60 feet depression of the mouth of Payne's creek, a horizontal line rep- resenting the lake level, 26 miles long (the distance between these two creeks) and connecting the points so determined by a straight line to represent the slope of the preglacial main valley, which may well be considered a uniform grade along this part of its course — we find that this line cuts the lake level eight miles from Six Mile creek — just the di
. Annual report of the Regents. New York State Museum; Science. REPORT OF THE DIRECTOR rl47. Laying off vertically the 30 feet elevation of Six Mile creek and the 60 feet depression of the mouth of Payne's creek, a horizontal line rep- resenting the lake level, 26 miles long (the distance between these two creeks) and connecting the points so determined by a straight line to represent the slope of the preglacial main valley, which may well be considered a uniform grade along this part of its course — we find that this line cuts the lake level eight miles from Six Mile creek — just the distance between that point and Salmon creek, the mouth of which we found to be so nearly on the lake level. That this stream flowed northward is equally obvious. At what elevation compared to the present lake surface did this stream flow?* I think it is safe to say that the three tributaries studied had reached the same state of maturity — if they had not actually estab- lished the proflle of equilibrium near their mouths. If the bottom of the preglacial Payne's creek is 55 or 60 feet below the surface of the lake at its edge, and if the foot of the first falls is 45 feet above the lake, then the total fall of the preglacial stream in this distance of about a mile was about 100 feet. The possibility of the stream being locally diverted from its old channel at the falls is very remote, for the high rock walls on both sides of the stream above the falls preclude this view. If the lake were drained, so that only a stream occupied its pres- ent bed, this stream would flow IJ miles from the creek's present mouth, and nearly 300 feet below it. If this were the original con-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum; University of the State of New York. Board of Regents. Albany : J
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