Yuba Placer Dredge 21 (Cal Sierra Development; Dredge No. 21), Hammonton Mining District (Yuba River Mining District), Yuba County, California, USAi
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
39° 11' 6'' North , 121° 27' 25'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Linda | 17,773 (2011) | 10.3km |
| Beale Air Force Base | 1,319 (2011) | 12.2km |
| Marysville | 12,216 (2017) | 12.4km |
| Olivehurst | 13,656 (2011) | 12.9km |
| Smartsville | 177 (2016) | 13.7km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Sutter Buttes Gem & Mineral Society | Marysville, California | 12km |
| Nevada County Gem & Mineral Society | Grass Valley, California | 34km |
| Feather River Lapidary & Mineral Society | Oroville, California | 38km |
A former placer Au mine (dredge) located in sec. 31, T16N, R5E, MDM (general location since this was a mobile dredge), in the Yuba Gold Field (Hammonton District). Owned by the Cal Sierra Development, Inc. (owner of Yuba Placer Gold Co.) (100.00%) California (1997). MRDS database stated accuracy for this location is 100 meters.
NOTE: Owning company's name changed from Yuba Westgold (West Gold) Inc. to Cal Sierra Developemtn, Inc., owner of Yuba Placer Gold Co.
Local rocks include Quaternary alluvium and marine deposits.
Reserve-Resource data are found in: American Mines Handbook (1996), Cal Sierra Development, Inc.: 54; and, Randol Mining Directory (1996-1997), Cal Sierra Development: 152.
Reserves: Type: In-situ; Estimate year: 1997; Demonstrated: 86,182,550 metric tons of ore at 0.002000 grams/metric ton Au.
Comments on the reserve resource information, continued: Resources as of 1992: Listed as 76 million cubic yards containing 457,659 ounces of Au (0.006 ounces/cubic yard).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au Description: Placer material. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
List of minerals for each chemical element
| Au | Gold | |
|---|---|---|
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10214788 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- California Central ValleyAccretionary Complex
- Foothills-Wallowa DomainDomain
- Great Valley BasinBasin
- Sacramento BasinBasin
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0061150178
