The Washington-Multnomah Area is a aluminum mine located in Washington county, Oregon at an elevation of 492 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 492 Feet (150 Meters)
Commodity: Aluminum
Lat, Long: 45.6864, -122.98690
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Washington-Multnomah Area MRDS details
Site Name
Primary: Washington-Multnomah Area
Secondary: Portland Hills Bauxite
Secondary: Washington and Multnomah Counties
Secondary: Dixie Mountain Area
Secondary: Pumpkin Ridge Area
Commodity
Primary: Aluminum
Tertiary: Iron
Tertiary: Phosphorus-Phosphates
Tertiary: Water, Free
Tertiary: Titanium
Tertiary: Silica
Location
State: Oregon
County: Washington
District: Washington County Barite District
Land Status
Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Type: Located Claim
Type: Fee Ownership
Workings
Type: Surface
Ownership
Owner Name: Private Land With Potential Bauxite Deposits
Info Year: 1975
Owner Name: Reynolds Metals Co. See Comment
Percent: 68.00
Home Office: Virginia
Info Year: 1975
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Surface
Mining Method: Unknown
Discovery Year: 1944
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: Oregon Coast Range
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Unknown: Gibbsite
Unknown: Kaolinite
Unknown: Magnetite
Unknown: Ilmenite
Unknown: Hematite
Comments
Comment (Deposit): ADDITIONAL 15 MIN. MAPS ARE THE HILLSBORO AND FOREST GROVE QUADRANGLES. WATER AND POWER ARE ALREADY ESTABLISHED AT THE MINE SITE. THERE IS MINOR DEFORMATION BECAUSE OF LATERIZATION. MOST OF THE LATERIZATION TAKES PLACE ON THE LOWER PART OF THE DIP-SLOPE. TO SOME EXTENT THE LAND FORMS ARE A RESULT OF DEFORMATION AND THE ORE IS RELATED TO GEOMORPHOLOGY. ORE IS NOT CONTINUOUS FOR THE LENGTH AND WIDTH OF THE MINERALIZED ZONE. MATRIX GRADES AND TONNAGES ARE BASED ON WET TONNES. MINE LIFE IS 11.5 YEARS. AUGER AND CORE DRILLING TOOK PLACE TBETWEEN 1944 AND 1977. BENIFICIATION COSTS ARE BASED ON THE BAYER PROCESS. REYNOLDS OWNS 68 PERCENT OF THE RESOURCE AREA. SOURCE OF PUBLISHED RESOURCES, HOOK. 1976
References
Reference (Deposit): P. 152-155.
Reference (Deposit): OR. DEPT. GEOL. AND MIN. INDUST. BULLETIN 14-D, 1951,
Oregon Gold
"Where to Find Gold in Oregon" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Oregon. Read more: Where to Find Gold in Oregon.
