76 FORTYMILE, BIRCH CREEK, AND FAIRBANKS PLACERS, [bull. 2.-1. 
( Maims arc in most cases staked lengthwise of the creek and include 
20 acres. They are worked by open cuts and by drifting with steam 
points. 
The ground at the mouth of Twin has a depth of about 12 feet. In 
1903 a cut 300 feet long and 18 feet wide had been worked out, and in 
1904 the work was continued. The open-cut method was used. 
The depth to bed rock on claim No. 2 above Discovery on Pedro 
(reek is 14 to 16 feet. Eight prospect holes were sunk to bed rock 
during the winter of 1902-3 by thawing with wood fires, 4 holes being 
worked at a time, and sunk at the rate of 1 foot per da} r . Ground 
sluicing was commenced in June, 1903, and about 4 feet of ground was 
sluiced oil'. A bed-rock drain 800 feet long, 1 foot in diameter, and 16 
feet below the surface was constructed at a cost of about $1 per foot. 
Shoveling in commenced about July 20, when most of the ground had $ 
become thawed to bed rock, and a cut was worked 120 by 32 feet. 
Two sets of sluice boxes were used, into which the dirt was shoveled 
directly as shown in Fl. XV, A. The boxes were 12 feet long and 11 
by 13 inches in section, and were set with a grade of 7-J inches to the 
box. The gold was caught in the 4 sluice boxes in the proportion of 
16, 4, 2, and 1. A waste ditch had been constructed, and a ditch 1,200 
feet long brought water to the upper end of the claim from a small 
tributary down the creek on the west side. An area 400 by 80 feet was 
being stripped for work during 1904. The stripping of the muck 
gives the ground an opportunity to thaw 7 out rapidly in the spring. 
A 30-horsepower boiler was in use in 1904 to operate a steam hoist, 
which raised the gravel a distance of 30 feet to the sluice boxes in 
iron buckets having a capacity of 8 cubic feet. By this method TOO 
buckets a day could be handled. A mud box 20 inches high, 50 inches 
wide, and 20 feet long was used. Several steam points thawed the I 
ground in advance of the work of excavation, and a small steam pump 
was in use to help drain the cut. On claim No. 1 A ft and Discovery I 
claim preparations were being made in 1903 for future work by j 
the construction of bed-rock drains and by stripping. In 1904 I 
4-horsepower boilers Avere in use operating as many as 4 steam points I 
with a capacity of about 10 to 14 cubic yards in nine hours. Similar 
work was in progress on No. 4 below. On Nos. 5 I>" and 6 B, where I 
the depth to bed rock is about 10 feet, preparations had been made 
in 1903 to work by open cut. A bed-rock drain 850 feet long hadB 
been constructed, but frozen ground had been encountered and the.' 
work brought to a temporary standstill. In 1904, however, extensive I 
work Avas under way both by open cut and by drifting with points. I 
On No. 7 the depth to bed rock is about 24 feet, and the muck is nearly 1 
20 feet thick. The drifting method is employed, and with four 
points about 12 cubic yards a day can be thawed. On No. 8 B four holes 
and "B" indicate claims above and beiow Discovery, respectively. 
