4D twin · seismic-tied
Lucky Friday
Hecla Mining · Shoshone County, ID · site LTH-LUCKY-FRIDAY-ID
Loading twin…
1035 m NAVD88 · Vp low —— high
Ore–seismic crosswalk
Each shell is tied to the survey that would image it. Desk compilation from published USGS / industry methods — not the operator’s confidential cube. Not a reserve.
| Ore shell | Survey | Method | Year | Tie | Vp m/s |
|---|---|---|---|---|---|
| 30 Vein / Lucky Friday vein | In-stope microseismic array | Microseismic | 2023 | Ties the shell | 4200–6400 |
| Gold Hunter vein | In-stope microseismic array | Microseismic | 2023 | Ties the shell | 4200–6400 |
| 30 Vein / Lucky Friday vein | 30 Vein tomography | VSP / borehole | 2018 | Ties the shell | 4000–6300 |
| Gold Hunter vein | Silver Shaft surface 2D | 2D reflection | 2011 | Structural offset | 1800–5400 |
PhD geological read
User-initiated. Grounded in MCS 2026, the mapped ore shells, and the seismic crosswalk. Not a reserve.
Coeur d'Alene district. Steeply dipping silver-lead-zinc veins in the Revett Formation. One of the deepest U.S. mines. High seismic risk — rockburst monitoring is core to the 4D twin.
Capacity
Workforce350
Nameplate120 tpy
Utilization74%
Effective89 tpy
t / person-year0
Landform is site-typed: porphyry pit, block cave, underground vein/reef, Carlin, gravel, quarry. Seismic fences are Vp-banded.