| Deposit ID | 10262570 |
|---|---|
| MRDS ID | M100463 |
| MAS/MILS ID | 0060790186 |
| Record type | Site |
| Current site name | Hilltop Claim |
| Related records | 10043645 |
| Point of reference | Pit |
|---|---|
| Geographic coordinates: | -120.74538, 35.41937 (WGS84) |
| Location accuracy | 1000(meters) |
Political divisions (FIPS codes)
San Luis Obispo(county)
California(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Atascadero(quadrangle 1:24,000 scale)
San Luis Obispo(quadrangle 1:100,000 scale)
San Luis Obispo(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Central Coastal(hydrologic unit)
Central California Coastal(hydrologic accounting unit)
Central California Coastal(hydrologic subregion)
California(hydrologic region)
Federal lands
Los Padres National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | California | San Luis Obispo |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Mount Diablo | 029 S | 011 E | 12 | California |
| Commodity | Importance |
|---|---|
| Chromium Critical | Primary |
| Pit (1) | Franciscan Complex, unit 1 (Coast Ranges) |
|---|
| Operation type | Surface |
|---|---|
| Development status | Prospect |
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Ownership category | National Forest |
|---|
| Type | Owner |
|---|---|
| Owner | C. L. Seeley And Geo. Miller |
| Interest | 100 |
| Home office | California |
| Year | 1941 |
| Type | Operator |
|---|---|
| Owner | U.S. Chrome Mines, Inc. |
| Home office | California |
| Year | 1951 |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0060790186 | |
| USGS | Mineral Resources Data System | MRDS | M100463 | MAS references MRDS |
CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD, CENTRAL
COAST REGION. SURFACE WATER DEGRADATION BY INACTIVE
METAL MINES IN NORTHWEST SAN LUIS OBISPO COUNTY, CA,
DECEMBER 1993 (P. 6-8).
CALIF. JOUR. MINES AND GEOL., V. 37, 1941, P. 162.
U.S. BUREAU OF MINES RI 4783, 1951, P. 6-7.
CALIF. DIV. MINES BULLETIN 134, 1953, PART II, CHAPT 2,
P. 82.
| Subject category | Comment text |
|---|---|
| Environmental Factors | CHROMITE DEPOSITS IN THE CHORRO CREEK WATERSHED ARE NOT SULFIDES WITH POTENTIAL TO GENERATE ACID MINE DRAINAGE THOUGH THEY MAY ERODE CHROMIUM, ALUMINUM, 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 LISITO CREEK, PENNINGTON CREEK, AND UPPER CHORRO CREEK APPEAR TO BE THE MOST HEAVILY MINE-IMPACTED TRIBUTARIES IN THE CHORRO CREEK WATERSHED. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 05-DEC-1994 | Ridenour, James | U.S. Bureau of Mines |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
These are landing pages for further research — the state agencies don't currently expose per-mine deep links.