Report of progress of stream measurements for the calendar year 1905, Part XI, Colorado River drainage above Yuma

The hydrographic work of the United States Geological Survey includes the collection of facts concerning and the study of conditions affecting the behavior of water from the time it reaches the earh as rain or snow until it joins the oceans or great navigable rivers. These investigations became a distinct feature of the work of the Survey in the fall of 1888, when an instruction camp was established at Embudo, N. Mex. The frist specific appropriation for gaging streams was amde by the act of August 18, 1894, which contained an item of $12, 500 'for gaging the streams and determining the water supply of the United States, including the investigation of underground currents and artesian wells in the arid and semiarid sections.'