Gold Dredge
Also known as: Tuolumne Gold Dredging Company Dredge
Why it's listed
Gold dredging left its mark on the Tuolumne River country near La Grange, and this dredge is one of its surviving machines. Built in 1937 for the Tuolumne Gold Dredging Company to a design by engineer Walter W. Johnson, it displaced about 3,600 tons and dug to a depth of 75 feet with a 92-ton bucket chain. It carried its own pond, digging ahead and leaving tailings behind, and it processed gold-bearing gravel inside through a revolving trommel before mercury was used to extract the gold. It capsized about a year into operation, was righted, and worked until 1949. The nomination values it as a remnant of the last phase of the California gold rush and of the worldwide dredging industry, set among hydraulic mining scars, ditch remnants and tailing piles. The dredge is two stories high plus a control house, and is mainly intact though neglected. Local proposals to turn it into a museum lacked funds.
Significance in brief: The nomination presents the dredge as a significant remnant of the last days of the California gold rush and of the worldwide gold dredging industry. It stands amid landscapes altered by a century of mining, from hand mining through hydraulic mining to mechanized dredging. It is also tied to the region's "southern mine" heritage and to early large-scale electric power use by an irrigation district.
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 71000208, listed December 16, 1971. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence medium).
Key facts
| Address | S of La Grange, La Grange |
|---|---|
| County | Stanislaus County |
| Listed | December 16, 1971 |
| Reference number | 71000208 |
| Resource type | Structure |
| Period of significance | 20th Century |
| Architect / builder | Designed by engineer Walter W. Johnson of San Francisco; built for the Tuolumne Gold Dredging Company |
| Areas of significance | Industry, Other |
| Level of significance | Local |
| Status (as stated in the nomination) | Described as two stories high plus a control house, mainly intact though neglected. Condition is marked fair, and the property is marked unoccupied. Talk of making it a museum has lacked local funding. |
| Acreage | 2.5 |
| Coordinates | 37.63326, -120.47743 (NPS GIS) |
What listing means for this property
National Register listing is honorary: it recognises significance and does not restrict what a private owner may do without federal money or permits. It unlocks the 20% federal rehabilitation tax credit for income-producing buildings, state credits in many states, and Section 106 review when federal agencies are involved. See what listing means in practice.
Noted as vacant in the nomination. Nomination documents can be decades old; current status may differ. If you are considering buying an empty listed property, read the due-diligence checklist.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 71000208.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q65059422
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.