Discharge rating.- Records include flow over concrete spillway 171.25 feet in crest length, a rating for which has been prepared by use of coefficients* derived from experiments made in the hydraulic laboratory of Cornell University on a model section of the dam; the discharge through two power units equipped with 300 kilowatt generators which have been rated by current meter measurements; and the discharge through two five-foot waste gates when open. Ocassional observations are made on the inclined staff gage at the cable as a check on the ratings of spillway and turbines. Extremes of discharge.- Maximum daily discharge during year, 5,400 second-feet April 3; minimum daily discharge 100 second-feet August 29. 1908-1917: Maximum daily discharge recorded, 6,410 second-feet, April 20, 1914; minimum daily discharge recorded, 90 second-feet, September 28, 1914. Special study.-A portable water stage recorder was operated at the cable for a short period in July, 1914. Mean daily discharge computed from its record compared very closely with mean daily discharge based on power plant ratings. Ice. The crest of the spillway is kept free from ice so that the stagedischarge relation is not affected. Regulation. The lakes and ponds on the main stream and tributaries above the station comprise a water surface area of about 25.5 square miles. The actual storage afforded by these reservoirs has been largely increased by the State dam at Lower Saranac lake, the operation of which affects the distribution of flow throughout the year. Accuracy. Discharge measurements made during the year indicate that the ratings of spillway and turbines have not changed. Discharge over the spillway ascertained by applying to the rating table mean gage heights for six-hour periods. Discharge through the turbines ascertained by applying to their ratings, the mean K. W. output and head for twelve-hour periods. Results fairly good. Co-operation. Gage height records and watt-meter readings furnished by Plattsburg Gas & Electric Co., Herbert A. Stutchbury, superintendent. Station established and maintained by the United States Geological Survey in co-operation with the Conservation Commission. Discharge measurements of Saranac River near Plattsburg, during the year ending September 30, 1917 a Measurement made in tailrace, no appreciable flow over spillway. Horton, R. E., Weir experiments, co-efficients and formulas, U. S. Geological Survey, Water Supply Paper 200, pages 98-100, 1907. Daily discharge, in second-, eet, of Saranac River near Plattsburg, for the year ending Monthly discharge of Saranac River near Plattsburg for the year ending September 30, 1917 [Drainage ares, 607 square miles] Allegheny river gaging station records at Redhouse.... gaging station records: Ausable Forks Newman, west branch near power studies partially completed.. PAGE 124 289 105 311 341 343 82 B Bean, T. H, note concerning death of... Beaver Kill gaging station records at Cooks Falls... 41 279 Beaver river, gaging station records near Beaver river post office.. 327 Black River canal flowing south near Boonville, gaging station record for. 320 .63, 73 Brasher Center, gaging station records for St. Regis river at.. 337 18 с Canadice lake outlet, gaging station records near Hemlock... |