4D twin · seismic-tied
Massena smelter
Alcoa · St. Lawrence County, NY · site LTH-MASSENA-NY
Loading twin…
76 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 |
|---|
PhD geological read
User-initiated. Grounded in MCS 2026, the mapped ore shells, and the seismic crosswalk. Not a reserve.
St. Lawrence hydropower-fed pots. No mine — metal node on the aluminum supply twin.
Capacity
Workforce500
Nameplate130,000 tpy
Utilization72%
Effective93,600 tpy
t / person-year260
Landform is site-typed: porphyry pit, block cave, underground vein/reef, Carlin, gravel, quarry. Seismic fences are Vp-banded.