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

Sites Table
AIM Id Name Alternate Name District County
GR003109 BROOKLYN MINE AND MILL PRINCETON GRANITE
MRDS AMLI MILS Latitude Longitude Datum
20-025 46.3903 -113.1219
Township Range Section QSection UTM Northing UTM Easting UTM Zone UTM Datum
07N 12W 5 ACC
Average Elevation Elev Units Land Owner 250K Quad 100K Quad 24K Quad
6200 F BUTTE PHILIPSBURG PIKES PEAK
Property Type Update Date Who Updated
LODE/MILL 3/27/1995 SAC
Agency Info Table
Information
Agency: NF
Region District: R1
Ranger District: PHILIPSBURG
Forest Service Tract:
Watershed Code: 17010202
Forest or Resource Area: DEERLODGE
Owner: N
Impact:
Report: Brooklyn The Brooklyn is one of the most extensively developed mines in the Princeton district, and dumps and mill tailings associated with the property are responsible for some environmental damage. In fact, tailings disposal was an environmental issue here even in 1951. Underground maps (unpublished information, MBMG files) indicate the ore was mostly mined from a soft, sheared porphyry dike with a N36W vertical attitude. The dike contains pyrite and nodules of quartz, barite, sphalerite, galena, ccalcite, lead carbonate, and copper carbonate (Emmons and Calkins, 1913). Some ore was also extracted from the adjacent sheared limestone and black shale of the Madison group. An outcrop of granodiorite related to the Royal stock is mapped one half mile to the southeast (McGill, 1959). The average grade of ore produced was 12 oz/ton Ag, 1% Cu, 3% Pb, and 8% Zn (unpublished information, MBMG files), but some of the ore was of considerably higher grade. In 1907, 80 tons provided 37 oz/ton Ag, 1.7% Cu, 8% Pb, and 13% Zn (Emmons and Calkins, 1913). The mine was worked intermittantly beginning in 1907. In 1917, a crude flotation mill was built at the site (the Brooklyn Mill of this paper), and it also operated intermittantly with poor recovery rates until 1927. Sometime in the 1940s a new flotation mill, the Non Pareil mill, was constructed downstream of the mine and operated until perhaps 1951. Exploration was still proceeding at the mine in the ealy 1960s. Today the mine encompasses over 3000 feet of workings with 3 caved adits, 1 caved shaft, and 1 open adit. Runoff from the upper workings and Brooklyn Mill tailings is carried directly into Boulder Creek during storm events, and may be responsible for the fish kills reported in the 1960s (oral communication, Mark Russell, Princeton resident). There is also evidence of a seasonal discharge from the lower adit (the Lower Brooklyn of this study). The Lower Brooklyn dump contains 5000 tons of clays, black shale, limestone, and pophyry along the banks of Boulder Creek. Most of the material contains 5% pyrite and some quartz alteration.
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
BLBS10L OEB 8.43 148 8/17/1992 1990 GPM METER STREAM NO DOWN BOULDER CREEK NO BOULDER CR.; 100' DOWNSTREAM OF MINE
Screening Criteria Table
Information
Mill Tailings: Y
Adit Discharge: Y
Metal Leaching: Y
Water Erosion: Y
Residence: N
Hazardous Materials: N
Open Adit: Y
Visit: Y
Comments: MBMG HYDROGEOLOGIST: JAMES MADISON; 8/18/92
Solids Table
Sample Id Source Date Sampler Sample Type L Transect Soil Interval Indicator of contamination Path Veg Color Salt Photos Available? Photo Numbers
BLBD10M MI 8/18/1992 ARB COMP 0-6", 5' INTERVALS
FBRT10H MI 7/6/1993 TB COMP
FBRW10H WA 7/6/1993 TB COMP
FLBW10H WA 8/5/1992 JL COMP
Waste Table
Type Wind Erosion Veg Rill Gully Seep Pond Breach None Stability Floodplain Dist Stream Photos Available? Photo Numbers
MI05 MOD BARREN R LOW OUT 500
WA01 LOW BARREN N LOW IN 0
WA02 LOW BARREN N LOW OUT 1000
WA03 LOW BARREN N LOW OUT 1000
WA04 LOW BARREN N LOW OUT 1000
Rank Table
Information
Investigator: J. MADISON
Date: 8/18/1992
Photos Available?:
Access:
Nearest Wetlands/Bog:
Drainage Basin: BOULDER CREEK
Water Contact Stream: Y
Nearest Surface Water Intake: 7
Number of Surface Water Intake(s) observed within 15 miles downstream:
Uses of Surface Water Intake(s) observed within 15 miles downstream: IRRIGATION; STOCK
Nearest Wells (miles): 2.5
Number of Wells within 4 miles: 5
Uses of Wells within 4 miles: DOMESTIC
Nearest Dwelling (miles): 2.5
Number of Months Occupied: 12
Number of Houses within 2 miles: 5
Recreational Usage on Site: L
Nearest Recreational Area (miles):
Name or Type of Recreational Area:
Safety Risk from Open Adit/Shaft: Y
Safety Risk from Highwall or Unstable Slopes:
Safety Risk from Unstable Structures:
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:
Population within 0.5-1 miles: 0
Population within 1-2 miles: 0
Population within 2-3 miles: 0
Population within 3-4 miles:
Public Interest:
Soil Chemistry Table
Sample Id Lab Id Description Project Comments
BLBD10M 92S0892 BROOKLYN MINE AND MILL DLFORST Changed by Rich; 5/31/95

End of report. Retrieved 5/3/2024 7:43:06 PM.

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.