122 ALASKAN MINERAL RESOURCES TN 1906. 
In all, about 50,000 yards of gravel were washed from two pits, wit! 
reported satisfactory results. The deposit worked lies in a nasi |u 
formed by the damming of Crow Creek by a terminal moraine, lei 
after the retreat of the glacier which formerly occupied its valley. 1 
cut through this moraine had been run at considerable expense to ta 
the bedded deposits lying above it. At the upper pit a giant usin 
200 inches of water under a pressure of 240 feet had moved 15,00 
yards. The flume from this pit was 3 feet 9 inches deep by 50 inch] 
wide and floored with 8-inch square blocks. The posts and sills wei 
4 by 6 inch timber, and the lining boards were 3 inches thick. Th 
side and bottom boards were made of lj-inch lumber. A grade of 
inches in 14 feet was maintained, and the tailings were dumped i 
Crow Creek. A 5-ton derrick, reported to move 1^ yards a minut( 
was used in removing rock too large to put through the flume. Thirt 
inches of water under a pressure of 200 inches was sufficient to run th 
derrick. In the lower pit 25,000 yards was moved in ten days by tw 
giants equipped with 5-foot nozzles and supplied each with 250 inch! 
of water under a head of 250 feet. Above the upper pit, jutting ov 
from the mountain side on the northeast, may be seen what appear 
to be a remnant of the valley filling consequent on the damming c 
Crow Creek by a glacial moraine. It consists of a ridge of ill-sorte 
angular material, cemented by a fine rock-flour silt, a condition to lb 
expected where deposition was as rapid as would occur near the hea 
of a gulch of extremely steep gradient. It is reported that a drift ru 
into the deposit disclosed prospects of sufficient value to warrar 
mining by hydraulic methods, and it is planned to begin active woi 
next season. 
Mining on Sixmile Creek, which enters Turnagain Arm at the tow) 
of Sunrise, was not carried on with any great activity during 1!)0( 
but the high benches along its course were worked by individuals wit ] 
small outfits at several localities. Work in the stream gravels propl ( 
amounted to little. At the forks of Canyon Creek an attempt wgj 
made to reach bed rock by means of a hydraulic elevator. What su< • 
cess attended the work was not evident at the time of visit, as won 
had ceased. 
Bench claims on Gulch Creek, a tributary of East Fork a short diJ 
tance above its junction with Sixmile Creek, produced a sma j 
amount. 
On Canyon Creek the most important work was that by S. Mi 
Wible. About 50,000 cubic yards were moved during the season b [j 
hydraulic methods from a bench claim on the east side of the creel I 
Water, which during the height of the season amounts to 1 ,000 < j 
1,500 inches, is brought through a ditch 4 miles in length. The dit( I 
measures 6 feet at the top, 3 feet at the bottom, and is 3 feet dee j; 
