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Spanish Silver in Arizona
October 2001 by Edgar B. Heylmun, PhD
When Spaniards entered what is now Arizona, they encountered diggings made by Opata Indians. The Opata Indians, who now live and mine in the northeastern part of the state of Sonora, Mexico, were one of the few Indian tribes that was...
Legislative and Regulatory Update
• Critical minerals obtain national security status
• Idaho to take over EPA permitting
Forest Service Final Rule—When is a Notice or Plan Required?
On June 6, 2005, the Forest Service published a Final Rule regarding section 36 of the Code of Federal Regulations Part 228 (36 CFR 228) titled, “Clarification as to When a Notice of Intent to Operate and/or Plan of Operation is Needed..."
Feds Eye Restrictions on AZ Archaeological Sites
The Interior Department is proposing a moratorium on new mining and grazing in a 176-square-mile area of central Arizona dotted with American Indian ruins, a possible first step toward a new national monument.
Ask the Experts: VMS ore
Q: Are there any mills that handle VMS ore?
NAS Agrees to Review Superfund Science
The National Academy of Sciences has taken a step toward reviewing a proposed cleanup plan in Idaho.
VLF Detector Operating Modes
It is important to note that discrimination is a type of electronic filtering. The signal is analyzed, and depending on the discrimination setting, identified as either a target to be dug or a target to be ignored.
Picks & Pans: Selecting a Gold Dredge
I have made my living gold dredging for the past 25 years, and I am often asked how someone should choose their first, or next dredge. There are many considerations, and I hope to save you time and aggravation by sharing with you what I have learned.
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