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

Sites Table
AIM Id Name Alternate Name District County
JF006193 ELDORADO AND PLATEAU MINE ELDORADO & PLATEAU JEFFERSON
MRDS AMLI MILS Latitude Longitude Datum
46.4125 -112.2225
Township Range Section QSection UTM Northing UTM Easting UTM Zone UTM Datum
08N 05W 27 CBCB
Average Elevation Elev Units Land Owner 250K Quad 100K Quad 24K Quad
7440 F NF BUTTE BUTTE NORTH CHESSMAN RESERVOIR
Property Type Update Date Who Updated
LODE 3/9/1995 SAC
Agency Info Table
Information
Agency: NF
Region District: R1
Ranger District:
Forest Service Tract:
Watershed Code:
Forest or Resource Area: DEERLODGE
Owner: N
Impact:
Report: Eldorado and Plateau A caved shaft, a caved adit, and an open cut follow a N84E 70NW shear zone with veins of quartz, pyrite, galena, and sphalerite. The property is of note because a large area of altered, iron stained quartz monzonite extends to the north and because there are some high metal values associated with the system. A select vein sample ran .332 oz/ton Au, 17.63 oz/ton Ag, .290% Cu, 2.70% Pb, and 4.30% Zn. A vein sample described by the USGS (MRDS database) had .25 oz/ton Au and 6 oz/ton Ag. Site was sampled on 9/28/93
Assay Table
Information
Sample Id: JJEP-1
Material Type: VE
Sample Method: SELECT
Comments:
Mines Table
Type Condition Ground Water Photos Available? Photo Numbers Ownership Comments
A01 COLP NO Y NF PHOTO # 11-6.
P01 PART STAND Y NF PHOTO # 11-25.
P02 PART STAND Y NF PHOTO # 11-26
S01 COLP NO Y NF PHOTO # 11-19.
S02 COLP NO Y NF PHOTO # 11-20.
S03 COLP NO Y NF PHOTO # 11-21.
S04 COLP NO Y NF PHOTO # 11-23.
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
NEPG10L 9/28/1993 DUPLICATE OF NEPS70L,TOTAL RECOVERABLE METALS
NEPS10H JRB 4.66 529.5 9/28/1993 14.2 0.05 GPM BUCKET N Y Y N Y Y NA SEEP NO Y PHOTO 11-16. SEEP ON WEST SIDE OF OPEN CUT.
NEPS20M JRB 7.47 86.7 9/28/1993 12.4 0.5 GPM BUCKET N Y N N N N NA SEEP NO Y PHOTO 11-17. SEEP ON NORTH SIDE OF OPEN CUT.
NEPS30H JRB 5.95 276.8 9/28/1993 13.5 0 GPM POND N Y N N Y N NA NO Y PHOTO 11-25. POOL IN OPEN CUT.
NEPS40H JRB 5.39 279.7 9/28/1993 9.8 0 GPM POND N Y N N N N NA NO Y PHOTO 11-26. STANDING WATER IN PIT AT FOOT OF WASTE-ROCK DAM.
NEPS50M OEB 6.31 113.6 9/28/1993 6.4 3 GPM BUCKET Y N N N N N DEVELOPED SPRING NO Y PHOTO 11-10. DEVELOPED SPRING SOUTH OF CABINS.
NEPS60L OEB 6.68 31.4 9/28/1993 10 60 GPM BUCKET STREAM Y N N N N N UP NELLIE GRANT CREEK NO Y PHOTO 11-27. NELLIE GRANT CR. ABOVE OF SITE.
NEPS70L OEB 6.34 39.6 9/28/1993 7.8 85.7 GPM BUCKET STREAM Y N N N N N DOWN NELLIE GRANT CREEK NO Y PHOTO 11-29. NELLIE GRANT CR. BELOW SITE.
NEPS80H 9/28/1993 DUPLICATE OF NEPS10H, DISSOLVED METALS
Screening Criteria Table
Information
Mill Tailings: N
Adit Discharge: Y
Metal Leaching: N
Water Erosion: N
Residence: N
Hazardous Materials: N
Open Adit: Y
Visit: Y
Comments: WATER WAS NOT PRESENT ON SITE IN 1992; BUT WAS FLOWING FROM A CAVED ADIT (?) IN 1993
Structures Table
Type Number Condition Photos Available Photo Numbers Comments
CA01 2 F Y PHOTO #s 11-3 AND 11-4.
MB01 2 F Y PHOTO # 11-5
Waste Table
Type Wind Erosion Veg Rill Gully Seep Pond Breach None Stability Floodplain Dist Stream Photos Available? Photo Numbers
WA01 LOW MOD N N N N N Y LOW OUT 800 Y
WA02 LOW SPARSE N N Y Y N N LIKE OUT 1200 Y
WA03 LOW BARREN N N N N N Y LOW OUT 1600 Y
M-Mines Table
Type Latitude Longitude UTM_N UTM_E UTM_Z Size Open Length Size Open Width Elevation Elevation Units
A01 4 FT.
P01 200 FT. 20 FT.
P02 15 FT. 8 FT.
S01 4 FT.
S02 10 FT.
S03 10 FT.
S04 10 FT.
Rank Table
Information
Investigator: R. MARVIN
Date: 9/22/1993
Photos Available?: Y
Access: 4W
Nearest Wetlands/Bog: 3
Drainage Basin: CATARACT CREEK
Water Contact Stream:
Nearest Surface Water Intake: 15
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): 5
Number of Wells within 4 miles: 0
Uses of Wells within 4 miles:
Nearest Dwelling (miles): 1.5
Number of Months Occupied: 3
Number of Houses within 2 miles: 1
Recreational Usage on Site: M
Nearest Recreational Area (miles): 9
Name or Type of Recreational Area: MOOSE CREEK CAMPGROUND
Safety Risk from Open Adit/Shaft: Y
Safety Risk from Highwall or Unstable Slopes: Y
Safety Risk from Unstable Structures:
Safety Risk from Chemicals: N
Safety Risk from Solid Waste (includes sharp rusted items): Y
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: 1
Population within 3-4 miles: 0
Public Interest: M

End of report. Retrieved 5/3/2024 7:18:32 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.