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

Sites Table
AIM Id Name Alternate Name District County
LC007345 LAST CHANCE GULCH PLACER HELENA PLACERS / OROFINO HELENA LEWIS AND CLARK
MRDS AMLI MILS Latitude Longitude Datum
D006880 300490312 46.5792 -112.0711
Township Range Section QSection UTM Northing UTM Easting UTM Zone UTM Datum
10N 04W 35 D 5158739 417928 12
Average Elevation Elev Units Land Owner 250K Quad 100K Quad 24K Quad
F BUTTE ELLISTON HELENA
Property Type Update Date Who Updated
PLACER
Commodities Table
Commodities Identified
COPPER
GOLD
SILVER
Agency Info Table
Information
Agency: NF
Region District: R1
Ranger District: HELENA
Forest Service Tract:
Watershed Code: 10030101
Forest or Resource Area: HELENA
Owner: M
Impact:
Report: In the Helena-Last Chance district (Krohn and Weist (1977), with a total production from 1864 to 1959 of 940,000 oounces of gold making it a medium sized deposit. Quaternary gravel was placered by surface cuts.
Screening Criteria Table
Information
Mill Tailings: N
Adit Discharge: N
Metal Leaching: N
Water Erosion: N
Residence: N
Hazardous Materials: N
Open Adit: N
Visit: N
Comments: PLACER.
Placer Table
Information
Gold: Y
Silver:
Titanium:
Rare Earth Elements:
Sapphire:
Garnet:
Tungsten:
Platinum:
Magnetite:
Hematite:
Pyrite:
Commodity Ref: Lyden, C.J., 1948, The Gold Placers of Montana, MBMG Memoir 26, 152 p.
Geologic Source: Lode; Skarn gold.
Geologic Source Ref: Lyden, C.J., 1948, The Gold Placers of Montana, MBMG Memoir 26, 152 p.
Lag:
Transported: Y
Type Comments: Placer gold derived from the lode deposits in Last Chance Gulch and its tributaries. Quaternary gravels. Gulch placer (23).
Type Ref: McCulloch, Robin, Lewis, Bob, Keill, Don, and Shumaker, Matthew,, 2003, Applied gold placer exploration and evaluation techniques, MBMG Special Publication 115, 267 p.
Unknown:
Fine:
Coarse:
Comments:
Size Ref:
Finess: 0.889
Fineref: McCulloch, Robin, Lewis, Bob, Keill, Don, and Shumaker, Matthew,, 2003, Applied gold placer exploration and evaluation techniques, MBMG Special Publication 115, 267 p.
Spoil pile:
Wash pile:
Wash over:
Wash under:
Waste Ref:
Year Discovered:

End of report. Retrieved 5/2/2024 12:24:21 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 The information is considered unpublished and is subject to correction and review on a daily basis.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.