Chatham Great Hill Cobalt Nickel Arsenopyrite Mine
Past ProducerArsenic, Iron, Nickel, CobaltUSGS MRDS
Location
State
Connecticut
County
Middlesex
Coordinates
41.57721, -72.55035
Commodities
Primary
Arsenic, Iron, Nickel, Cobalt
Secondary
Sulfur
Tertiary
Zinc, Lead, Copper
Mine Details
Status
Past Producer
Discovery Year
1661
Data Source
USGS MRDS
Source ID
10067769
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.