Abandoned gold mine records in Adams County
3 records marked abandoned by MSHA. They are listed for reference only. Land status is from BLM's public dataset and can be out of date; being on public land is not permission to enter old workings.
Show the 3 abandoned records
| Name | Type | Status since | Nearest town | Land | USGS record |
|---|---|---|---|---|---|
| Bromley Lakes | surface | Oct 11, 2016 | Brighton | Private land or land not mapped as public | n/a |
| Federal Mill | processing facility | Aug 17, 2015 | Denver | n/a | n/a |
| Portable Placer #1 | surface | Sep 26, 1989 | n/a | n/a | n/a |
Historic gold producers in Adams County (USGS)
USGS records 5 historic gold producers in Adams County: 3 past producers and 2 listed as producers or plants. For 1 of them USGS gives an output size (1 large). Production years are recorded for 3 sites, from 1951 to 1964.
Show the 5 sites
| Site | USGS status | Output | Commodities | Years |
|---|---|---|---|---|
| Cooley Gravel Co. Pits | Past producer | large | Sand and Gravel, Construction, Gold | 1951 to 1964 |
| Thornton Pit | Producer | n/a | Sand and Gravel, Construction, Gold | from 1980 |
| Unknown | Producer | n/a | Gold, Silver, Sand and Gravel, Construction | n/a |
| Adams North Pit | Past producer | n/a | Sand and Gravel, Construction, Gold, Silver | from 1956 |
| Gordon Pit | Past producer | n/a | Sand and Gravel, Construction, Gold | n/a |
Source: USGS Mineral Resources Data System (retrieved 2026-10-13). The database was last updated around 2011, positions can be approximate and "producer" does not mean a mine is operating today. Sites already matched to an MSHA record are shown in the MSHA tables.
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