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borings showed that the ground in the valley flat has a maximum depth of
about 70 feet, but there was one boring on the bench on the east side
which is said to have been over 100 feet deep. One bore-hole, in which
the casing remains, located 600 feet above the cross-section, was put down
by Henry Boursin and J. Reddick. Mr. Reddick states that it was 62
feet deep and produced 65 cents in gold. Three holes were also put down
by them near the lower end of the flats on Summit creek. One onthe south
side, about 800 feet above the mouth of Eightmile creek, was about 82 feet
deep and passed through 40 feet of slum in the upper part and gravels
beneath. The other two were on benches opposite Hightmile creek. The
one on the south side was about 25 feet deep and the other about 38 feet.
These holes are said to have shown some gold values, but much less than the
hole on Pine creek. There is a rock canyon on Summit creek just below
the mouth of Hightmile creek, and the ground in the wide flat of Summit
creek above Eightmile creek is much deeper than at the head of the canyon.
A rock basin, therefore, underlies the flat and was probably formed by a
glacier moving west from the mountain slopes. The pay-streaks which
may have existed in the old valley bottom must have been removed by
the ice, and the pay-gravels mixed with the glacial drift. The gold on Pine
creek is mostly derived by reconcentration from the glacial drift and it may
be that the gold at the Thistle pit at Eightmile lake was derived by stream
concentration from gravels that had been glacially transported from the
basins of Summit and Pine creeks.

Mining on Pine creek during the past few years has been done only
at one place on the upper part of the creek, by J. Reddick who holds two
leases on the creek. Gold was discovered in coarse gravels resting on bed-
rock along the west side of the creek just north of where it cuts through a
gravel ridge one-half mile above Shepherd creek, and about 35 feet above
the level of the creek. In the spring of 1922 mining by ground-sluicing
and shovelling into sluice boxes was carried on by Messrs. Reddick, Reed,
and Mason, and about $150 in gold, including one $45 nugget, was recovered
from about 120 yards of gravel. The gold occurs in glacial gravels which
include many large boulders in the bottom of a shallow draw between which
and the creek is a low, esker-like ridge of gravels containing little or no
gold. The only apparent mode of origin of the pay-streak is that the gold
was derived from the glacial drift and was concentrated by ice-border
drainage waters. The esker gravel deposits, which occur abundantly at
the head of the valley and extend for several miles along the west side of
Little valley, were probably formed in ice tunnels at the bottom of the
glacier or ice-sheet, and as arule contain no pay-streaks. The extent of the
pay-streak is not known and mining can be done on only a small scale as
the water available for hydraulicking is limited and the head that can be
obtained is only a few feet.

Summit Creek

Summit creek, below the mouth of Eightmile creek, flows northeast
in a deep, narrow valley cut through the mountain ridge trending across
it, and 7 miles lower down joins Antler creek, flowing in a broad valley
nearly parallel to Bear Lake valley to the east. One and a half miles