Monthly discharge of Whetstone River at Bigstone, S. Dak.—Continued. LAC QUI PARLE RIVER AT LAC QUI PARLE Location. At the highway bridge at Lac qui Parle in Sec. 26, T. 118 N., R. 42 W., in Lac qui Parle County, a short distance above the mouth of Threemile Creek. Records available.--April 27, 1910, to November 15, 1912. Drainage area.-677 square miles. Gage. Vertical staff; datum unchanged since established. Channel. Shifting during flood stages. There are no dams on the stream which control its flow at the present time. Discharge measurements.-Made from the bridge. Winter flow. The river is frozen over and the observations are discontinued from December to March. Daily discharge, in second-feet, of Lac qui Parle River at Lac qui Parle. Day. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. Daily discharge, in second-feet, of Lac qui Parle River at Lac qui Parle-Cont. NOTE.-Daily discharges computed from a fairly well-defined rating curve. Monthly discharge of Lac qui Parle River at Lac qui Parle. Estimated from climatological records and comparison of flow at Odessa, Watson and Montevideo. CHIPPEWA RIVER NEAR WATSON. Location. At highway bridge 21⁄2 miles northeast of Watson, on line between Secs. 10 and 15, T. 118 N., R. 41 W., 10 miles above the mouth of the river and about 2 miles below the mouth of Dry Weather Creek. Records available.-July 6, 1909, to November 10, 1912. Drainage area. -1,940 square miles. Gage. Chain gage attached to bridge; datum unchanged since established. Channel. Shifting at intervals. Discharge measurements.-Made from the bridge. Regulation. At Montevideo there is a water power plant utilizing a head of 7 feet, but backwater from the dam does not extend to the gaging station. The first dam above the station is at Hagan, but the effect of the control is inappreciable at Watson. Winter flow. From December to March observations are discontinued because of ice. Accuracy. As the discharge measurements show some change in the channel, the records cannot be considered better than good. |