The data below represent everything available in the MBMG Abandoned and Inactive Mines (AIM) database.

Sites Table
AIM Id Name Alternate Name District County
JF002061 BLACK BEAR BASIN JEFFERSON
MRDS AMLI MILS Latitude Longitude Datum
300430291 46.3492 -112.2439
Township Range Section QSection UTM Northing UTM Easting UTM Zone UTM Datum
07N 05W 21 BBBC 5134112 404620 12
Average Elevation Elev Units Land Owner 250K Quad 100K Quad 24K Quad
7640 F BUTTE BUTTE NORTH MOUNT THOMPSON
Property Type Update Date Who Updated
LODE 3/26/1997 JMC
Commodities Table
Commodities Identified
COPPER
GOLD
LEAD
SILVER
Agency Info Table
Information
Agency: NF
Region District: R1
Ranger District: JEFFERSON
Forest Service Tract:
Watershed Code: 10020006
Forest or Resource Area: DEERLODGE
Owner: M
Impact: V
Report: Black Bear Two short caved adits discharging water and one flooded shaft comprise the privately held Black Bear. However, the main dump associated with the shaft is partially on Deerlodge National Forest lands. It is composed of 3000 tons of quartz monzonite with abundant pyrite from alteration. Metal content of the dump is .050 oz/ton Au, 2.07 oz ton Ag, .032% Cu, .175% Pb, and .176% Zn. An extensive area of contaminated soil extends from the dump to the nearby creek The mine is located on the Crystal shear zone between the Crystal and the Eva May. It was worked in 1902, 1911, and 1917 with 504 tons of production yielding 64 oz Au, 557 oz Ag, 6720 lbs Cu, 97 lbs Pb, and no Zn (Roby and others, 1960), so it was not a particularly rich mine. Vein minerals are quartz, pyrite, chalcopyrite, galena, and sphalerite.
Assay Table
Information
Sample Id: JJBB-1
Material Type: WA
Sample Method: COMP
Comments: HOMOGENEOUS WALLROCK ALTERED TO QTZ-SER-PY (10%)
Mines Table
Type Condition Ground Water Photos Available? Photo Numbers Ownership Comments
S01 PART NO Y NF
Sample Table
Sample Id Sampler pH SC Date TempC Flow Rate Flow Units Flow Method Source Ind No Veg Stain Salt Sulf Turb Location Related to Stream Stream Sedimention Photos Available? Photo Numbers Remarks
CBBS10L JCF 6.95 34.9 7/30/1992 8.4 17.1 GPM BUCKET STREAM N N N N N UP UNNAMED NO Y
CBBS20M JCF 6.77 64.2 7/30/1992 10.2 19 GPM BUCKET STREAM N N N Y Y DOWN UNNAMED STREAM MOD Y
Screening Criteria Table
Information
Mill Tailings: N
Adit Discharge: Y
Metal Leaching: Y
Water Erosion: Y
Residence: N
Hazardous Materials: N
Open Adit: Y
Visit: Y
Comments: LONN; 6/92
Solids Table
Sample Id Source Date Sampler Sample Type L Transect Soil Interval Indicator of contamination Path Veg Color Salt Photos Available? Photo Numbers
CBBD10H 7/30/1992 JCF COMP 10 0-6" Y Y
Waste Table
Type Wind Erosion Veg Rill Gully Seep Pond Breach None Stability Floodplain Dist Stream Photos Available? Photo Numbers
WA01 MOD BARREN Y Y N N N LOW IN 0 Y
M-Mines Table
Type Latitude Longitude UTM_N UTM_E UTM_Z Size Open Length Size Open Width Elevation Elevation Units
S01 6 8 7640 F
Rank Table
Information
Investigator: J. METESH
Date: 7/30/1992
Photos Available?: Y
Access: 4W
Nearest Wetlands/Bog: 2
Drainage Basin: CATARACT CREEK
Water Contact Stream: N
Nearest Surface Water Intake: 6
Number of Surface Water Intake(s) observed within 15 miles downstream: 2
Uses of Surface Water Intake(s) observed within 15 miles downstream: IRRIGATION
Nearest Wells (miles): 4
Number of Wells within 4 miles: 2
Uses of Wells within 4 miles: DOMESTIC
Nearest Dwelling (miles): 4
Number of Months Occupied: 2
Number of Houses within 2 miles: 4
Recreational Usage on Site:
Nearest Recreational Area (miles): 5
Name or Type of Recreational Area:
Safety Risk from Open Adit/Shaft:
Safety Risk from Highwall or Unstable Slopes:
Safety Risk from Unstable Structures: Y
Safety Risk from Chemicals:
Safety Risk from Solid Waste (includes sharp rusted items):
Safety Risk from Explosives:
Sensitive Environments within 2 miles of Site or 15 miles Downstream:
Population within 0-0.25 miles: 0
Population within 0.25-0.5 miles: 2
Population within 0.5-1 miles: 0
Population within 1-2 miles: 0
Population within 2-3 miles: 0
Population within 3-4 miles: 0
Public Interest: L
Soil Chemistry Table
Sample Id Lab Id Description Project Comments
CBBD10H 92S0672 BLACK BEAR DLFORST

End of report. Retrieved 5/3/2024 11:20:32 AM.

The preceding materials represent the contents of the databases at the Montana Bureau of Mines and Geology at the time and date of the retrieval. The information is considered unpublished and is subject to correction and review on a daily basis. The Bureau warrants the accurate transmission of the data to the original end user at the time and date of the retrieval. Retransmission of the data to other users is discouraged and the Bureau claims no responsibility if the material is retransmitted. There may be data in the request area that are not recorded at the Bureau.