Shea Creek, meanders on a 0.7 per cent. grade in the bottom

of a more or less flat-bottomed, widely-flaring valley. Down-
stream to a point 1,200 feet above Alice Shea Creek, Wheaton
Creek meanders on a low grade, 0.3 per cent. in one stretch,
over a flat alluvial bottom about 200 feet wide. On either
side of the valley-bottom, low rock bench remnants progress-
ively rise down-stream to a height of 30 feet above creek-lev-
el. From the point 1,200 feet south of Alice Shea Creek to

& point midway on the Roosevelt lease (No. 336), the average
grade of the creek is 2.5 per cent. In this stretch, although
the general course of the creek is straight, there are oc-
casional small meanders. The meandering is confined by steep
rocky canyon-sides to an alluvial flat which ranges from about
50 feet wide at the lower end to about 200 feet wide at the
upper. The canyon-walls in this section increase down-stream
to a height of 100 feet above the creek. Nowhere does bed-
rock outcrop in the creek-bottom. A shaft and drill-hole at
the northern end of the Caribou lease (No. 360) indicate that
the creek at that point flows over at least 31 feet of valley-
fa 1

For a short stretch on the Roosevelt lease (No. 336) the
creek runs on a 7.6 per cent. grade in a narrow canyon.

From 1,000 feet south of the No. 1 post of the Roosevelt
lease (No. 336) to 200 feet south of the No. 1 post of the
Peacock lease (No. 345), the creek flows on a 1.9 per cent.
grade. The creek no longer is confined in a canyon and. the
valley has widened. Though there are rock bench remnants on
either side, the flat reaches a maximum width of about 250
feet. No bed-rock is exposed’ in the creek-bottom and a shaft
on lease No, 336 and the drag-line cut on lease No. 345 indi-
cate that the creek flows over at least 26 feet of unconsoli-
dated material lying above bed-rock.

The creek enters a narrow steep-walled rock canyon just
north of the No. 1 post of the Peacock lease (No. 345), and
drops on an average grade of 4.9 per cent. to the Wheaton
Creek Falls, which is 60 feet high. In this section, the
ereek flows on bed-rock or over as much as 10 feet of gravel
between canyon-walls which are from 50 to 100 feet above creek-
level. Rock bench remnants about 30 feet high line the creek
on each side.

From the foot of the falls, Wheaton Creek flows on a 1.4
per cent. grade across the alluvial valley-flat of Turnagain
River. The elevation of Turnagain River at its confluence

with Wheaton Creek is 3,414 feet.
‘