34 PROGRESS REPORT, HYDROGRAPHY, 1893 AND 1894. [bull. 131. 1 
and covered. This rod is in a small recess of the bank, and is inclined 
at an angle of abont 30° to the horizontal, the footmarks being 2 feet 
apart along the rod. The 7-foot mark on the rod is 0.89 foot below the 
top of the screw thread on the bottom of the east side of the north pile 
of the second bent from Palisade. The channel is of loose sand, nearly 
straight at this locality. Measurements of discharge are made about 
25 feet above the gage. One of these on December 28, 1894, gave for 
a height of 1.87 feet a discharge of 116 second-feet. Observations were 
begun on October 14, 1894, and were continued throughout the year. 
ARKANSAS BASIN, IN COLORADO. 
A large number of discharge measurements have been made at 
various points upon this stream and its tributaries, and a few of the 
stations established in 1889 have been maintained with a fair degree 
of continuity. It has f been the intention to make a thorough study of 
this river, since it involves many problems of great importance, some 
of them interstate in character, and affords unusual facilities in the 
way of storage for the conservation of the waters of floods which 
will result in increased development of irrigation below. The highest 
station — that at Hayden — is primarily for the purpose of obtaining 
the quantity of water which might be held by storage in Twin Lakes 
or other reservoir sites, while measurements at Canyon City give the 
total flow of the stream at the point where the river is most regular in 
its behavior and least likely to be affected by cloud-bursts. Measure- 
ments at Pueblo, La Junta, and at Holly, near the State li ne, give, of 
course, results as affected by diversions at points above. 
This station is located at bridge 203A, on the Denver and Eio 
Grande Eailway, 1J miles from Hayden section house. The observer 
is Mr. J. Burns, section foreman at Hayden. The distance of the 
observer's house from the gaging station is 1J miles. The gage is of 
pine or spruce bridge timber, 16 feet long. One end rests on the 
bottom. It is inclined 2.5 to 1, making the distance between the foot- 
marks 2.5 feet. The gage is fastened to the wooden revetment at the 
north end of the bridge with a seven-eighths-inch bolt and five 10-inch 
bridge spikes. It will stay as long as the revetment stands. The 
character of the channel is coarse gravel. The top of the revetment 
timber at the south end of the revetment is on a level with the point 
6.04 feet of the gauge. The measurements of discharge were made 14 
feet south of the north end of bridge 203A. This is a reasonably good 
location. 
A measurement made September 24, 1894, by Mr. Arthur P. Davis, 
showed a mean velocity of 1.93 feet and discharge of 114 second-feet} 
a second measurement October 16 gave 91 second-feet. 
