Mason and Thayer

Gold past producer · Trinity County, California

Past ProducerGoldUSGS MRDS

Section

What kind of site this is
ADITORE · GOLDSECTION · ILLUSTRATIVE

Drawn as a small mine; the records don't say whether it was worked from the surface or underground. The ore color stands for gold. Federal records note the kind of operation and its status, not its depth or layout, so this is a typical example rather than a survey of this site.

Location

StateCalifornia
CountyTrinity
Coordinates40.84178, -123.01778

Commodities

PrimaryGold
SecondaryCopper

Mine Details

StatusPast Producer
Data SourceUSGS MRDS
Source ID10035846
This siteNearby records

Search within 10 miles of here Open in Google Maps

Nearest Recorded Sites

SiteDistanceCommodityStatus
Mason-Thayer Mine0.1 miGoldPast Producer
Four Point0.2 miGoldPast Producer
Bailey Claim0.4 miArsenicOccurrence
Maple Mine0.5 miGoldPast Producer
Maple Mine0.6 miGoldPast Producer
Silver Grey0.8 miGoldPast Producer
Silver Grey Mine0.8 miGoldPast Producer
Isabel0.9 miGoldPast Producer
Eureka1.1 miGoldPast Producer
Eureka1.1 miGoldUnknown
Oswald1.3 miGoldPast Producer
Canyon Placers Inc1.3 miGoldOccurrence

What This Means

This mine is a past producer — it was once operational but is no longer actively mining. Past producer sites may still have environmental impacts including disturbed land, tailings piles, and potential water quality effects. Some past producer sites have been reclaimed, while others remain as-is. Check with your state mining or environmental agency for current site conditions.

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