Site Narrative
The Contact Mine is situated in the West Mayacmas Mining District near the headwaters of Anna Belcher Creek. According to historical records the mine was located about 1870 and was intermittently active up to 1956. The mine workings which are mostly caved consists of a main inclined shaft, two adits and a drain tunnel. Production through 1942 is estimated at 1000 flasks. This site and the Sonoma Mine downstream may be contributing mercury-laden sediments to the drainage system which flows into the Russian River.
Previous/Existing Assessments
The locations and condition of mine features were compiled in April, 2001 where high flow water sampling and retort tails were sampled.
Estimated Costs
Sampling costs so far at the site total about $1000. Additional costs to sample water and sediments downstream are anticipated during 2002 and 2003.
Risks: Water Quality
AMLIS #: CA013400007
Location: N38 45 31, W122 45 47
Field Office: Ukiah
Congressional District: 01
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