New London Mine

The New London Mine is a mine located in San Luis Obispo county, California at an elevation of 1,060 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: New London Mine
Secondary: London Mine
Secondary: London

Commodity

Tertiary: Chromium
Tertiary: Iron

Location

State: California
County: San Luis Obispo
District: Cuesta Pass

Land Status

Land ownership: State
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Type: Minerals Only

Workings

Not available

Ownership

Owner Name: Evelyn Purdy-Minerals Only
Percent: 100.0
Home Office: California
Info Year: 1976

Production

Year: 1954
Description: Concentrates Produced From 1954-1957 1700 Mt @ 44.23 Pct
Year: 1954
Description: Lump Ore Mined From 1954-1957 333 Mt @ 43.52 Pct
Year: 1953
Description: Concentrates Produced 1500 Mt @ 41.59 Pct
Year: 1953
Description: Ore Mined 4900 Mt
Year: 1953
Description: Lump Ore Mined 100 Mt @ 44.1 Pct
Year: 1943
Description: Concentrates Produced 200 Mt
Year: 1943
Description: Ore Mined 2500 Mt
Year: 1936
Description: Lump Ore Mined 41 Mt
Year: 1916
Description: Lump Ore Mined - 1916 To 1918 3500 Mt
Year: 1883
Description: Lump Ore Mined 400 Mt

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Surface-Underground
Mining Method: Unknown
Year First Production: 1883
Discovery Year: 1882
Years of Production:
Organization:
Significant: N

Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Coast Ranges

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Unknown: Chromite
Unknown: Magnesite
Unknown: Serpentine
Unknown: Talc
Unknown: Uvarovite

Comments

Comment (Deposit): 16 SAMPLES FROM DUMP IN 1941 AVERAGED 12.54 PERCENT CR2O3.SA FROM PIT FLOOR AVERAGED 11.68 PERCENT CR2O3. UNDERGROUND WORKINGS OBLITERATED BY OPEN PIT OPERATIONS OF T IS.APPROXIMATELY 500 TONS AVAILABLE IN MINE DUMPS AND ORE PI MINE DUMPS CURRENTLY SILTING DRINKING WATER SUPPLY. ANALYSIS BY CDMG IN 1976 GAVE FOLLOWING PERCENTAGES-DISSEMIN E=S102 03.12,CR2O3 54.08,FEO 12.73,TOTAL FE 16.72,AL203 10.8

Comment (Environmental Factors): CHROMITE DEPOSITS IN THE CHORRO CREEK WATERSHED ARE NOT SULFIDES WITH POTENTIAL TO GENERATE ACID MINE DRAINAGE THOUGH THEY MAY ERODE CHROMIUM, ALUINUM, MAGNESIUM, IRON, MANGANESE, TITANIUM, CALCIUM, SILICON, AND NICKEL TO THE WATERSHED. METALS WHICH APPEAR TO BE ERODING FROM INACTIVE MINES INCLUDE MAGNESIUM, IRON, NICKEL, AND CHROMIUM. SAN LUISITO CREEK, PENNINGTON CREEK, AND UPPER CHORRO CREEK APPEAR TO BE THE MOST HEAVILY MINE-IMPACTED TRIBUTARIES IN THE CHORRO CREEK WATERSHED.

References

Reference (Deposit): CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD, CENTRAL

Reference (Deposit): COAST REGION. SURFACE WATER DEGRADATION BY INACTIVE

Reference (Deposit): METAL MINES IN NORTHWEST SAN LUIS OBISPO COUNTY, CA,

Reference (Deposit): DECEMBER 1993 (P. 6-8).

Reference (Deposit): CALIF. STATE MINING BUR. BULLETIN 76, 1918, P. 171-173.

Reference (Deposit): CALIF. JOUR. MINES AND GEOL. V. 37, 1941, P. 162-163.

Reference (Deposit): U.S. GEOLOGICAL SURVEY BULLETIN 945-B, 1944, P. 41-42.

Reference (Deposit): U.S. BUREAU OF MINES RI 4783, 1951, P. 6.

Reference (Deposit): CALIF. DIV. MINES BULLETIN 134, 1953, PART II, CHAPT. 2,

Reference (Deposit): P. 62-63.

California Gold

"Where to Find Gold in California" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in California. Read more: Where to Find Gold in California.