GOLD    IN    UINTA    COUNTY,  WYO.,  AND    ON    SNAKE    RIVEE, 
83 
means  of  undercurrents.  In  the  25-mile  stretch  examined  by  Messrs. 
Gillette  and  Walker  mining  work  was  carried  on  only  at  the  Sample 
placer  claim,  owned  by  W.  H.  Philbrick,  who  employed  one  stream 
in  his  ground-sluicing  operations. 
The  following  table  shows  the  gold  values  in  the  placers  along 
Snake  River  near  the  Minidoka  dam.  The  location  of  the  pits  is 
shown  on  PI.  II  (p.  78).  The  figures  given  under  "  Depth"  indicate 
position  with  reference  to  the  surface  of  the  ground  at  which  the 
samples  were  taken.  " Percentage  of  oversize  on  2  mm."  indicates 
the  portion  too  coarse  to  pass  through  a  screen  having  openings  2 
mm.  (approximately  one-twelfth  of  an  inch)  square.  The  "under- 
size"  is  that  which  passes  through  the  screen.  The  value  of  the 
original  gravel  (oversize  plus  undersize)  is  given  by  the  ton  and  by  the 
yard,  a  }rard  being  assumed  at  1.3  tons.  Under  "Cumulative  value" 
is  given  the  average  value  of  all  material  that  would  have  to  be  moved 
in  excavating  to  the  depth  indicated. 
.Gold  values  of  Snake  River  placers  in  the  vicinity  of  Minidoka  dam,  as  determined  in  the 
black-sand  investigation  at  Portland,  Or  eg. 
Name  of  placer 
claim. 
Diamond  Bar Kinney 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Owner. 
.do 
.do. 
.do. 
.do. 
.do. 
Pit 
No. 
Depth. 
From- 
Ft.  in. 
3    10 
7      0 
3 
0 
!  ! 
8 
6 
{  ! 
6- 
0 
f    6 
0 
2 
6 
4 
0 
7 
0 
1     8 
0 
1     * 
6 
0 
I     6 
f 
6 
{     1 
f. 
6 
1 
8 
1     3 
0 
To— 
Ft.  in. 
8      0 
8  6 
15      0 
9  4 
12      6 
8  0 
7  0 
0 
0 
0 
0 
0 
0 
11) 
Per- 
cent- 
age of 
over- 
size on 
2  milli- 
meters. 
.0 
.7 
40.4 
15.6 
53.2 
48.0 
44.5 
71.6 
7.8 
76.9 
72.0 
63.1 
47.8 
10.2 
55.0 
Value 
of  un- 
dersize 
22.6 
73.2 
41.0 
14.1 
70.8 
9.0 
52.7 
31.9 
70.0 
63.8 
55.1 
33.1 
66. 0 
6.8 
70. 5 
32.9 
61.8 
54.7 
15.1 
71.0 
24.7 
62.2 
56.3 
Trace. 
$0.37 
.12 
.62 
.04 
.21 
.33 
.74 
4.34 
.12 
.50 
None. 
.41 
None. 
.08 
.00 
.33 
.29 
.21 
.41 
.99 
.41 
.37 
.37 
.79 
.91 
.08 
.12 
.50 
None. 
.04 
.33 
.33 
.83 
.  16* 
.62" 
.  00 
.25 
.00 
Value  of  orig- 
inal gravel. 
Per 
ton. 
SO.  00 
.37 
.07 
.  52 
.02 
.11 
.18 
.21 
4.01 
.03 
.14 
.00 
.21 
.00 
.04 
.00 
.26 
.08 
.12 
.35 
.29 
.37 
.18 
.25 
.24 
.33 
.04 
.08 
.17 
.on 
.01 
.22 
.  i:: 
.38 
.13 
.18 
.no 
.09 
.00 
Per 
cubic 
yard. 
SO.  00 
.48 
.09 
.68 
.03 
.14 
.23 
.27 
5.21 
04 
.18 
.00 
.27 
.00 
.05 
.00 
.34 
.10 
.16 
.46 
.38 
.48 
.  23 
.33 
.31 
.43 
.05 
.10 
.22 
.00 
.01 
.29 
.  17 
.49 
.17 
.23 
.(in 
.12 
.00 
Cumu- 
lative 
value. 
SO.  00 
.03 
.04 
.29 
.23 
.03 
.10 
.09 
2.65 
2.31 
.05 
.03 
.14 
.00 
.02 
.00 
.34 
.26 
.21 
.15 
.24 
.35 
.06 
.00 
.14 
.13 
.11 
.08 
.14 
.08 
.06 
.05 
.15 
.16 
.17 
.17 
.20 
.00 
.05 
.02 
