38 
FAIRBANKS AND RAMPART QUADRANGLES. 
bearing creeks are located at intervals along a distance of about 30 
miles. 
FAIRBANKS CREEK. 
Fairbanks Creek is about 10 miles long and flows in an easterly 
direction to Fish Creek, a tributary of Little Chena River. The floor 
of the valley is 200 to 450 feet broad but widens rapidly about 3 miles 
from the mouth. The productive area of Fairbanks Creek comprises 
about 4 miles of the valley, starting from a point about 2 miles below 
the source. The gravels in general range from 12 to over 30 feet in 
thickness but in the lower part of the valley are much thicker. The 
pay streak ranges from 4 to 8 feet in thickness, averaging about 5^ 
feet, while in some places 2 to 3 feet additional of bed rock are mined. 
The pay streak ranges from 40 to 200 feet in width and in the upper 
part of the valley lies close to the present stream bed but lower down 
the valley it diverges toward the north valley slope. Ground has been 
worked containing values in the pay streak ranging from 5 to 10 cents 
to the pan. As this streak has not been traced through the lower part 
of the valley it is uncertain whether it continues as a well-defined pay 
streak or becomes disseminated or distributed over a considerable 
area. Fairbanks Creek has been a good producer but is somewhat 
spotted, and ground should be carefully prospected to determine 
values before the introduction of expensive machinery. The follow- 
ing table of depths to bed rock, etc., is based on data obtained by Mr. 
Covert in 1907. 
Depth to bed rock, thickness of muck, and width of valley floor along Fairbanks 
Creek. 
Claim No. 
Depth to 
bed rock. 
Thickness 
of muck. 
Width of 
valley 
floor. 
S above 
Feet. 
14 
13 
16 
30 
30 
26 
25 
16 
17 
19 
18 
23 
23 
16 
26 
32 
Feet. 
4 
6 
8 
20 
20 
6 
5 
7 
5 
5 
6 
6 
6 
4 
8 
11 
Feet. 
250 
250 
6 above _____ _. _ 
300 
5 above 
300 
4 above _ 
300 
3 above.— _ 
400 
2 above _ __. 
400 
1 above _ 
400 
Discovery 
400 
1 below _ _ _ _ 
450 
2 below _. 
450 
3 below. ______ 
450 
4 below. __ _ 
450 
5 below __ 
400 
6 below 
450 
7 below _ _ 
450 
10 below 
COLDSTREAM BASTN.° 
Coldstream Creek is 50 or 60 miles in length and the upper 7 miles 
of it have been found to be auriferous. The floor of the auriferous 
fl The information regarding the Goldstream basin was obtained during the field season 
of 1907 by Alfred 11. Brooks and C. C. Covert. 
