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Bedrock Gulch

Past Producer in Alaska, United States with commodity Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Mineral occurrence model information
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10002573
MRDS ID A015008
Record type Site
Current site name Bedrock Gulch
Related records 10209530

Geographic coordinates

Geographic coordinates: -156.62103, 63.04472 (WGS84)
Relative position Bedrock Gulch, about 7.5 miles south-southeast of Ophir, is a short, north tributary to Dollar Creek, which is an east tributary to Beaver Creek. Bedrock Gulch is not named on U.S. Geological Survey topographic maps; most of it is in sec. 20, T. 28 S., R. 12 E., Kateel River Meridian. This site is location 10 of Cobb (1972 [MF 367]). The location is accurate within 1/2 mile.

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ophir A-2(quadrangle 1:63,360 scale)

Ophir SE(quadrangle 1:100,000 scale)

Ophir(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Federal lands

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore

Mineral occurrence model information

Model code 119
USGS model code 39a
Deposit model name Placer Au-PGE
Mark3 model number 54

Nearby scientific data

(1) -156.62103, 63.04472
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The area of Bedrock Gulch is underlain by undivided clastic rocks (Chapman and others, 1987). The thickness of pay gravel in the 1950's was 3-4 feet, and it was covered by 7 to 8 feet of muck and overburden. Saunders (1960) noted that Mr. Lindquist, the operator, expected to finish placer mining that area in 1959 and then move 3 or 4 miles downstream and continue mining. Smith (1937) reports active non-dredge mining along Bedrock Gulch in 1935. The next report of mining is in 1959 (Saunders, 1960).
  • Age = Quaternary.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Mining district

District name Innoko

Comments on the workings information

  • Workings / Exploration = Smith (1937) reports non-dredge mining along Bedrock Gulch in 1935. The next mention of mining is in 1959, when Saunders (1960) reports that Hjalmar Lindquist was mining the upper portion of the gulch with a TD-14 tractor. Mr. Lindquist expected to finish mining that area in 1959 and then move 3 or 4 miles downstream and continue mining.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Saunders, 1960

General comments

Subject category Comment text
Deposit Model Name = Placer Au (Cox and Singer, 1986; model 39a)

Reporter information

Type Date Name Affiliation Comment
Reporter 07-AUG-01 Cameron, C.E. Northern Associates Inc.

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.