Daily discharge, in second-feet, of Chippewa River near Watson-Continued.

Day. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. Oct. Nov. Dec.

NOTE.-Daily discharges computed from a well-defined rating curve.

Location.

tant.

REDWOOD RIVER NEAR REDWOOD FALLS.

-At the first highway bridge above Redwood Falls, 3 miles dis

Records available.-July 2, 1909, to November 30, 1912.

Drainage area.-703 square miles.

Gage. Chain gage attached to bridge; datum unchanged since established.

Channel.-Permanent prior to 1912.

Discharge measurements.-Made from the bridge except at low stages when they are made by wading at different sections.

Regulation. The nearest dam at Redwood Falls creates a pond extending upstream for a considerable distance, but owing to rapids just below the gaging station the backwater does not reach it.

Winter flow.-Ice exists from December to March, discharge measurements are made to determine the winter flow.

Accuracy.-Conditions at this station are favorable for excellent results, and the records should therefore be reliable.

Daily discharge, in second-feet, of Redwood River near Redwood Falls.

Day. Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. Oct. Νον. Dec.

Daily discharge, in second-feet, of Redwood River near Redwood Falls-Contd.

Daily discharge, in second-feet, of Redwood River near Redwood Falls-Contd.

Monthly discharge of Redwood River near Redwood Falls.
[Drainage area, 703 square miles.]

COTTONWOOD RIVER NEAR NEW ULM.

Location. At Alwin highway bridge, 2 miles southeast of New Ulm, in Sec. 31, T. 110 N., R. 30 W., 15 miles below the mouth of Sleepy Eye Creek, the nearest tributary.

Records available.-July 2, 1909, to December 31, 1912.

Drainage area. -1,190 square miles.

Gage. Chain gage attached to bridge.

On August 12, 1909, the datum
All readings prior to that date

of the gage was lowered 2.28 feet. have been corrected, so that all gage heights apply to the new datum.

Channel. Shifting after high water.

Discharge measurements.-Made from the bridge except during extreme low water when they are made at a wading section.

Regulation. Two miles below the station is the dam of the Cottonwood Roller Mill, which prevents any possible effect of backwater from the Minnesota reaching the gate. The low water records show no systematic variation to indicate control from the dam, and it is therefore believed that the effect of such control is slight.

Winter flow.-From December to March observations of the flow are discontinued because of ice.

Accuracy.-Conditions at this station are good and records of flow should be reliable.

Daily discharge, in second-feet, of Cottonwood River near New Ulm.

Day.

Jan. Feb. Mar. Apr. May. June. July. Aug. Sept. Oct. Nov. Dec.