Monumental Mine

Gold, Silver past producer · Grant County, Oregon

Past ProducerGold, SilverUSGS MRDS

Section

What kind of site this is
ADITORE · GOLD, SILVERSECTION · ILLUSTRATIVE
190019502000today

discovered 1870

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, silver. 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

StateOregon
CountyGrant
Coordinates44.86207, -118.34911

Commodities

PrimaryGold, Silver
TertiaryZinc, Lead, Copper, Antimony, Arsenic

Mine Details

StatusPast Producer
Deposit TypeVein
Discovery Year1870
Data SourceUSGS MRDS
Source ID10032990
This siteNearby records

Search within 10 miles of here Open in Google Maps

Nearest Recorded Sites

SiteDistanceCommodityStatus
Monumental Mine0.4 miGoldPast Producer
Ophir Mine1.0 miGoldUnknown
Cap Martin Mine1.0 miGold, Silver, Zinc, LeadOccurrence
Ophir1.0 miLead, Zinc, Copper, Arsenic, Gold, SilverOccurrence
Cap Martin Mine1.3 miGoldProspect
Sheridan1.4 miGold, Silver, Copper, AntimonyProspect
Sheridan1.4 miGoldProspect
Uncle Sam Mine1.6 miArsenic, Gold, SilverOccurrence
Blue Ribbon1.6 miGold, Silver, CopperPast Producer
Tillicum1.6 miGold, Silver, Zinc, Lead, Arsenic, CopperOccurrence
Tillicum Mine1.7 miGoldOccurrence
Uncle Sam Mine1.7 miGoldPast Producer

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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