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Gold Districts of California
FOREST HILL
Location. The Forest Hill district is in south-central Placer County in the
general vicinity of the town of that name. This district is fairlv large in area and
includes not only the "diggings" 'at Forest Hill but those at Bath to the east,
Todd Valley and Dardanelles to the southwest, and Yankee Jims to the northwest. The
district is principally a placer-mining one, although there have been some productive
quartz mines.
History. Gold was discovered here in 1850. By 1852 the area was highly
productive. In that year the Jenny Lind mine was discovered, and hydraulic mining was
introduced at Yankee Jims by Colonel McClure. The town was an important trading center in
those days. By 1868 the mines in the vicinity of the town had yielded more than $10
million. Large-scale hydraulic mining continued until the early 1880s and drift mining
until the early 1900s. There was appreciable activity in the district again in the 1930s
and early 1940s, and a few mines, such as the Paragon and Three Queens, have been worked
since. Forest Hill is now an important lumbering center. The total output of the district
is estimated to be at least $25 million, and it may be considerably more.
Geology. The main early Tertiary channel of the Middle Fork of the American
River enters the district from Michigan Bluff on the east. At Bath it turns north and then
west and southwest and continues southwest through Forest Hill. At the Dardanelles mine
west of Forest Hill, the channel swings northwest to Yankee Jims and then north to the
Iowa Hill district. An intervolcanic channel extends west-southwest from Baker Ranch to
north of Forest Hill. Another intervolcanic channel extends south-southwest between the
above and Yankee Jims. The older quartzitic gravels near bedrock are coarse and well
cemented and have yielded the most gold. Much of the gravel is overlain by rhyolite and
andesite. Bedrock is slate with some phyllite, schist, and serpentine. Some of the
gold-quartz veins were rich, especially those that occur near serpentine. The veins are
usually three to four feet thick and strike in a northwesterly direction. A number of
small but rich pockets were found in the Three Queens mine, the principal lode mine in the
district.
Mines. Placer: Baker Divide; Baltimore; Big Spring $150,000; Dardanelles $2
million+; Excelsior; Florida; Georgia Hill, Yankee Jim and Smiths Point, together $5
million; Grey Eagle; Homestake; Independent, New Jersey and Jenny Lind, together
$2,653,000; Mayflower $1 million; Maus; Paragon $2.65 million+; Peckham Hill and Todd
Valley, together $5 million; Pond; San Francisco- Small Hope; Yankee Jims. Lode: Dry Hill,
Eureka, Cons. International, Mitchell, Three Queens $100,000+.
Excerpt from: Gold Districts of California, by: W.B. Clark, California
Department of Conservation, Division of Mines and Geology, Bulletin 193, 1970.
Return to Principal Gold Districts
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