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

Sites Table
AIM Id Name Alternate Name District County
MA007259 BOULDER COBALT MINE BOULDER COBALT / RAINBOW TIDAL WAVE MADISON
MRDS AMLI MILS Latitude Longitude Datum
300570170 45.5975 -112.1214
Township Range Section QSection UTM Northing UTM Easting UTM Zone UTM Datum
03S 04W 5 DBDC 5050339 412546 12
Average Elevation Elev Units Land Owner 250K Quad 100K Quad 24K Quad
8900 F DILLON BUTTE SOUTH NOBLE PEAK
Property Type Update Date Who Updated
LODE 4/7/1995 PAH
Commodities Table
Commodities Identified
C
COPPER
GOLD
LEAD
SILVER
Agency Info Table
Information
Agency: NF
Region District: R1
Ranger District: JEFFERSON
Forest Service Tract:
Watershed Code: 10020005
Forest or Resource Area: DEERLODGE
Owner: N
Impact:
Report: Boulder Cobalt This property was described in detail by Cather and Linne (1983), who also mapped the one open adit. On the property, veins, shears, and altered areas in Archean gneiss extend for at least .25 miles. The veins have diverse orientations, and contain quartz, pyrite, secondary copper minerals, and siderite, and average 1.4 feet thick. Some very high gold values occur sporadically, with the best values from 27 samples being 2.140 oz/ton gold, 1.2 oz/ton silver, and .35% copper (Cather and Linne, 1983). A NE-striking breccia zone contains no sulfides and low metal values. Mineralization may be related to a small granitic stock nearby. Today there are 5 caved adits and one locked portal. Total length of workings is just over 1000 feet. All workings are dry. Dumps contain unaltered gneiss and gneiss with siderite as an alteration product. The Boulder Cobalt Mine is located adjacent to Upper Boulder Lake. Waste rock piles near the mine shaft have been moved and leave little indication as to the original dumps. The site consists of an open, flooded shaft and a spring emanating from the base of a waste rock pile. Sulfides were present but not abundant in the waste rock piles. JBCG10M: This will be a groundwater sample obtained from the shaft. The sample will be collected with a point-source bailer at the greatest depth possible. The sample will be analyzed for Dissolved Metals and Total Recoverable Metals. JBCS10M: Located at the head of the small spring at the base of the waste rock pile near the shaft. The sample will be analyzed for Dissolved Metals and Total Recoverable Metals. Discharge will be measured by means of a dam-pipe-bucket and stopwatch.
Mines Table
Type Condition Ground Water Photos Available? Photo Numbers Ownership Comments
S01 PART FLOW Y JBC1 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
JBCG10M JRB 6.74 385.6 10/21/1992 7 0 SHAFT N N N N N DRY BOULDER CREEK NO N JBC1
JBCS10M JRB 6.69 252 10/21/1992 7.4 2.73 GPM BUCK WASTE N N N N N DRY BOULDER CREEK NO Y JBC2 Probably related to shaft water
Screening Criteria Table
Information
Mill Tailings: N
Adit Discharge: N
Metal Leaching: N
Water Erosion: Y
Residence: N
Hazardous Materials: N
Open Adit: Y
Visit: Y
Comments: LONN; 10/92
Structures Table
Type Number Condition Photos Available Photo Numbers Comments
MB01 1 P Y JBC1 HEAD FRAME OVER SHAFT
Waste Table
Type Wind Erosion Veg Rill Gully Seep Pond Breach None Stability Floodplain Dist Stream Photos Available? Photo Numbers
WA01 LOW MOD Y N Y N N LOW OUT 100 Y
M-Mines Table
Type Latitude Longitude UTM_N UTM_E UTM_Z Size Open Length Size Open Width Elevation Elevation Units
S01 45.5975 -112.121388888889 6 6 9100 F
Rank Table
Information
Investigator: J. METESH
Date: 10/1/1992
Photos Available?: Y
Access: 4W
Nearest Wetlands/Bog: 3
Drainage Basin: BOULDER CREEK
Water Contact Stream: Y
Nearest Surface Water Intake: 3
Number of Surface Water Intake(s) observed within 15 miles downstream: 6
Uses of Surface Water Intake(s) observed within 15 miles downstream: IRRIGATION
Nearest Wells (miles): 9
Number of Wells within 4 miles: 4
Uses of Wells within 4 miles: DOMESTIC
Nearest Dwelling (miles): 9
Number of Months Occupied: 12
Number of Houses within 2 miles: 4
Recreational Usage on Site: H
Nearest Recreational Area (miles): 0.5
Name or Type of Recreational Area: FISHING
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: 0
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: M

End of report. Retrieved 5/1/2024 5:27:43 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.