4D twin · seismic-tied
Holcim Portland (Florence)
Holcim US · Fremont County, CO · site LTH-HOLCIM-FLORENCE
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1579 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 |
|---|---|---|---|---|---|
| Niobrara kiln-feed benches | Niobrara refraction | Refraction | 2015 | Ties the shell | 700–4200 |
| Pierre shale overburden | Niobrara refraction | Refraction | 2015 | Ties the shell | 700–4200 |
| Niobrara kiln-feed benches | Bedding GPR | GPR | 2021 | Ties the shell | 400–2800 |
PhD geological read
User-initiated. Grounded in MCS 2026, the mapped ore shells, and the seismic crosswalk. Not a reserve.
Front Range Niobrara limestone. Combined kiln and quarry; GEO-5 cement canvass plant.
Capacity
Workforce190
Nameplate2,100,000 tpy
Utilization79%
Effective1,659,000 tpy
t / person-year11,053
Landform is site-typed: porphyry pit, block cave, underground vein/reef, Carlin, gravel, quarry. Seismic fences are Vp-banded.