170 
GRAVEL AND PLACER MINING IN ALASKA, 
Extraction table. 
[bull. 263. 
Month. 
Dredged. 
T3 3 
Q 
as 
3 oj 
O 
So 
cd 
a 
0) 
o . 
> O 
U " 
a, >» 
8.2 
OX! 
k,3 
go, 
Character of ground 
dredged. 
January 
February 
March 
April 
May 
June 
July 
August 
September 
October 
November 
December 
Total or 
average.. 
32.1 
22.0 
28.7 
27.0 
27.0 
21.4 
22. 
26.0 
24.2 
23.8 
'IK 
0.40 
.90 
.89 
1.15 
1.09 
1.18 
1 . 25 
1.06 
1.27 
. 92 
20, 340 
32, 000 
41,160 
50, 760 
47,700 
40, 750 
44, 380 
39, 300 
41,600 
48, 460 
40, 300 
46, 400 
Cts. 
15. 35 
15.35 
37.70 
37.70 
16. 25 
10. 35 
11.45 
11.45 
4.40 
5. 25 
17.23 
Per 
cent. 
100. 20 
69. 57 
50.00 
50.00 
104. 24 
87.96 
84.02 
94.93 
230.00 
182. 43 
53. 40 
15. 38 
10. 65 
18.78 
18.91 
16. 94 
9.09 
9.62 
10.87 
9. 58 
9.20 
13.16 
6.89 
5.88 
3.65 
4. 68 
4.94 
5. 12 
6.29 
5.40 
5.02 
493, 150 
Coarse gravel to surface; 
dredging across slough. 
10 feet top soil; 2 feet of 
grave 1 on bed rock; hard 
digging. 
10 feet soil ; gravel coarse, 
and hard digging. 
12 feet top soil; 15 feet 
coarse gravel; 3 feet on 
bed rock; hard digging. 
12 feet top soil; gravel 
coarse. 
10 feet soil; gravel firm, 
and sand on north side 
of cut. 
4 feet top soil; coarse 
gravel on west side cut; 
sand streak on eastside. 
6 feet top soil; sand streak 
on west side of cut; all 
fine gravel; easv dig- 
ging. 
6 feet top soil; sand on 
west side of cut; all fine 
gravel; easy digging. 
6 feet top soil; sand in cen- 
ter of cut; remainder 
fine gravel; easy dig- 
ging. 
7 feet top soil ; east side cut 
in sand; remainder of 
cut fine, and coarse 
gravel. 
7 feet top soil; coarse and 
fine gravel full width of 
cut. 
