boittweu,]  PARK    CITY    MINING    DISTRICT,   UTAH.  149 
Stoping  is  done  by  the  overhand  process.  Timbering  is  done  on  the 
square-set  system  when  the  size  of  chambers  admits,  in  narrow  fissures 
by  props,  and  in  low,  flat  stopes  by  props  and  cribs.  Mine  ventilation 
is  good.  Drainage,  the  lack  of  which  has  been  for  many  years  a 
serious  obstacle  in  the  development  of  the  mines  of  the  district,  is 
now  adequately  effected  through  the  long  Ontario,  Daly -Judge,  and 
Alliance  drain  tunnels.  Three  properties,  which  apparently  lie  out- 
side of  the  ground  drained  by  these  deep  tunnels,  are  now  encounter- 
ing considerable  water  in  sinking  to  explore  virgin  ground. 
For  the  treatment  of  low-grade  ores  four  large  and  four  smaller  con- 
centrating mills  have  been  erected  by  individual  companies  on  their 
properties,  and  another  large  mill  is  expected  to  go  into  commission 
in  the  near  future.  These  large  mills  effect  an  unusually  high  saving. 
Two  of  the  large  properties  ship  directly  to  the  smelters  in  the  Salt 
Lake  Valley.  The  output  of  all  the  other  mines  passes  to  a  local  cus- 
tom sampler  en  route  to  the  valley  smelters.  One  of  the  large  mines 
transports  its  ore  from  the  mine  to  the  railroad  by  aerial  tramway,  the 
others  by  trams  drawn  by  horsepower  through  long  work  tunnels. 
Labor  is  well  paid,  and  employees  may  procure  good  board  and  lodg- 
ing, if  desired,  from  the  companies  at  their  mines. 
Recent  industrial  progress. — During  the  last  year  the  mining  indus- 
try in  Park  City  advanced  to  the  highest  stage  ever  reached.  More 
men  were  employed  and  more  work  in  surface  improvements,  in  under- 
ground development,  and  in  perfecting  methods  of  mining  and  milling 
was  accomplished  than  during  any  previous  year  in  the  history  of  the 
camp.  In  spite  of  two  serious  declines  in  the  price  of  silver  no  prop- 
erties were  closed  down.  At  date  of  writing,  however,  one  of  the 
most  extensive  properties  has  closed  its  mill,  except  to  conduct  experi- 
ments on  treatment  of  its  ores,  and  has  reduced  its  activit}^  to  explo- 
ration of  virgin  ground.  The  large  paying  mines  have  increased  their 
plants  and  extended  exploitation.  Thus  the  Silver  King  Company  has 
added  to  its  mill;  the  Daty  West  Company  is  deepening  its  main  shaft 
and  erecting  a  tailings  mill;  the  Ontario  Company  has  sunk  its  main 
shaft  to  a  depth  of  2,000  feet,  extensively  explored  its  great  lode  at 
depth,  and  remodeled  its  amalgamation  mill  into  a  modern  concentra- 
tion mill;  the  Daly- Judge  Company  has  entirely  refitted  its  drain  and 
work  tunnel  with  heavier  rails  and  equipment  preparatory  to  utilizing 
it  for  regular  shipping  by  power,  has  conducted  extensive  underground 
developments,  and  extensively  expanded  and  remodeled  its  concentra- 
tion mill;  the  Kearns-Keith  Company  has  continued  mining  through 
the  Hanauer  and  Alliance  tunnels,  erected  a  concentration  mill,  and 
begun  regular  shipments.  In  the  other  working  properties  the  year 
has  witnessed  extensive  underground  operations.  Following  the 
unusual  activity  in  the  fall  of  1902  in  the  incorporation  of  mining  com- 
panies, resulting  from  the  recent  discovery  of  valuable  ore  bodies, 
exploration  was  undertaken  which  is  still  being  vigorously  prosecuted. 
