MINEBK00961

• County: Jefferson
• Document: FROMSIC
• Suffix: A

TABLE TWO -- JEFFERSON COUNTY
MINE NAME COMMENTS ON FEATURES
Blue Bird
No. 1 S: Six subsidence pits. The largest pit is 80' long, 60' wide, and 10' deep
and is probabl
y
,
the location of the main shaft of the Blue Bird No. 1 Mine. Other pits are collapse
feat
ures over stapes. They range in size from 40' in diameter and 8' deep to 14' in
diameter
d 6'
an
deep.
Blue Bird
No. 2 S: Subsidence trough. Collapse over ad it of Blue Bird No. 2 has produced a trough 40' long
8'
'
,
wide, and 5
deep.
Economy D: In May of 1980 water was draining from the northernmost pit. Water flowed south across
th
i
e s
te and around the waste dump. Rate of flow was one gallon per minute.
S: Three subsidence pits mark collapsed inclined shafts. Pits are 20'-40' in diameter and
3'
'
-10
deep.
Reclamation scheduled for Spring 1984. The two openings at the Economy Mine will be back-
filled
i
us
ng a graded fill technique. All disturbed areas will be revegetated.
Golden Star S: Row of subsidence pits. Four pits form a 400' long row. Two pits 30' in diameter and 6'
'
and 15
deep respectively, mark the probable locations of the air shaft and hoist shaft of
th
G
l
e
o
den Star Mine. The other two pits are 10'-12' in diameter and 3'-4' deep and are
d
ue to collapse of stapes.
Z: Reference 2 notes that 2 seams were worked.
Hampton's
Prospect S: Subsidence pit. Small pit 10'-15' in diameter and 4' deep is the result of settlement of
fill
'
material in Hampton
s Prospect shaft.
Shaft

Key to unique features symbols: Z Multiple mining zones

Recl
amation and/or * Mine opening information
plans -- Table Two S Subsidence features
lists hazard abatement work F Mine fires
+ Discrepancy between two sources D Mine drainage
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