joutwell.]  ORE    DEPOSITS    OF    BINGHAM,   UTAH.  239 
above  the  quartzite  foot,  and  new  ore  also  opened  at  other  points. 
En  consequence  the  capacity  of  the  smelter  has  been  increased,  and  TOO 
tons  of  ore  are  now  treated  daily.  The  property  is  stated  to  have 
produced  during  1904  approximately  15,000,000  pounds  of  copper 
ind  to  have  paid  $900,000  in  dividends. 
The  United  States  Mining  Company  in  1900-1901  conducted  con- 
siderable exploration  in  the  Old  Jordan  and  Telegraph  mines  for 
copper  in  limestone,  and  recently  it  reopened  and  extended  workings 
3n  the  Galena  fissure  in  search  of  argentiferous  lead  ores.  A  1,000- 
ton  smelter  was  erected  for  treating  copper  ore,  and  a  smelter  of 
100-ton  capacity  has  just  been  completed  for  treating  its  argentiferous 
lead  ores.  An  aerial  tramway  of  Bleichert  pattern  transports  the  ore 
from  the  Jordan,  Galena,  and  Telegraph  mines  to  the  railroad,  a 
ilistance  of  3  miles.  During  1904  this  company  is  reported  to  have 
treated  at  its  new  smelter  11,000,000  to  12,000,000  pounds  of  copper, 
including  its  own  and  custom  ores. 
The  Bingham  Copper  and  Gold  Company,  operating  the  Com- 
nercial  and  Dalton  and  Lark  properties,  has  maintained  regular 
laily  shipments  of  200  tons  from  the  former  and  has  unwatered  and 
"eopened  the  latter.  In  the  course  of  reopening  the  consolidated 
properties  on  the  eastern  slopes  large  bodies  of  minable  copper  ore 
ire  stated  to  have  been  found  in  the  Dalton  and  Lark,  and  in  the 
Brooklyn.  During  1904  the  output  of  copper  from  these  properties 
s  reported  to  have  been  approximately  11,500,000  pounds. 
The  Boston  Consolidated  Company,  after  persistent  search  for  the 
i>ld  Stewart  ore  bodies  at  a  depth,  has  opened  on  the  Work  and  Pea- 
)ody  levels  a  large  shoot  of  rich  copper  sulphide  ore.  Extensive 
mderground  development  is  being  prosecuted  at  lower  levels  with  a 
new  to  catching  this  shoot  at  greater  depths.  Regular  shipments 
vere  maintained  in  1903— t,  and  it  is  reported  that  these  will  be  in- 
Teased  during  the  present  year. 
Several  smaller  companies  have  also  conducted  successful  develop- 
ment work.  Some  of  these  newer  companies  have  already  entered 
he  shipping  class.  Among  these  new  enterprises  mining  and  con- 
centration of  the  low-grade  copper-bearing  igneous  rock  is  most 
mportant. 
The  Utah  Copper  Company  has  secured  an  extensive  tract  in  the 
dcinity  of  Upper  Bingham,  which  includes  the  Wall  group,  and  has 
erected  a  500-ton  concentration  mill  in  main  Bingham  Canyon, 
tbout  1^  miles  below  Bingham.  The  ore  is  mineralized  monzonite 
belonging  to  the  great  laccolithic  stock  at  Upper  Bingham,  and  car- 
ries low  values  in  copper  and  gold.  It  is  now  mined  on  a  large 
•cale,  and  it  is  planned  to  increase  the  output  in  the  future  by  using 
he  open-cut  method.     Concentration  is  about  20  into  1,  by  the  usual 
