weight.] DESCRIPTION OF CLAIMS. 25 
si vol y developed, a good example of ground sluicing may be seen 
(PI. IX, B.) The stream is diverted into a 600-foot flume built along one 
side of the creek, and the large bowlders from the bed are piled along 
the banks or are used to form a narrow channel in which to confine 
the stream and increase its velocity. Through this the water is turned 
from time to time and its rapid current carries much of the gravel 
downstream. Thus the surface gravels are gradually removed and the 
gold is concentrated in a shallow deposit on bed rock, from which it 
is easily recovered. Very good returns are expected from this claim 
at the end of the season when bed rock is cleaned up. A small saw- 
mill is the only machinery used on the property. 
Woodin claim. — The Woodin claim and several others are owned b} T 
the McKinley Creek Mining Company. The first work on this prop- 
erty was on the creek bed, but in 1903 all operations were confined to 
a high bench deposit on the south side of the valley, 200 feet above 
the creek bed. The gravels fill two parallel channels, one 15 feet deep 
and 40 feet wide, the other 30 feet deep and 30 feet wide. In the 
Section of McKinley Creek at the Woodin claim. 
deeper of the two a good section of the gravel deposit is snown (tig. 4; 
PI. VI, B). Next to bed rock there is gravel wash, consisting of diorite 
cobbles and slate fragments, which contains good gold values. Over- 
lying this there is a deposit of blue clay or rock flour some 3 feet 
deep, carrying logs and branches of trees, and regarded so valueless. 
Above the clay are several feet of coarse wash, capped by a bod of 
gravel cement 2 to 3 feet thick. This cemented gravel or hardpan can 
not be disintegrated by the hydraulic stream, and is even difficult to 
loosen with hammer and pick. The gold is coarse, not so much worn 
as that of the Porcupine, and somewhat higher in silver values. 
The property borders an area of mineralized slates, containing many 
calcite veins, with some crosscutting quartz veins, all of which arc 
heavily charged with pyritc. A sample of the well-mineralized slate 
gave |2.48 in gold per ton. To develop this property sluice boxes 
have boon placed along the bottom of the channel, and through these 
the gravels are washed by a hydraulic giant, capable of working 
