| Characteristic | Churn and diamond drilling | Rotary reverse and circulation drilling | Percussion drilling, other drilling, and trenching |
|---|---|---|---|
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
| - | - | - | - |
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Source
Release date
February 2020
Region
United States
Survey time period
2015
Supplementary notes
Missing values refer to data that was withheld to avoid disclosing company proprietary data.
* Includes copper-molybdenum.
** Less than half of a unit.
*** Includes silver, platinum, and palladium, as well as withheld figures for copper, gold, lead, and silver.
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