# Relationship history for MSHA mine 2601829

Current hierarchy: **Old Soldier Barite Inc & Universal Barite Inc → Old Soldier Minerals → Stormy Creek Mill**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Hendrickson Robin → Stormy Creek Mill; 1980-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Old Soldier Barite Inc & Universal Barite Inc → Stormy Creek Mill; 1981-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Geowest Services Inc → Stormy Creek Mill; 1983-02-01 to 1983-07-04; source msha-controller-operator-history
- **controller_controls_operator:** Hendrickson Robin → Geowest Services Inc; 1983-02-01 to 1983-07-04; source msha-controller-operator-history
- **operator_operates_mine:** Old Soldier Minerals → Stormy Creek Mill; 1983-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Old Soldier Barite Inc & Universal Barite Inc → Old Soldier Minerals; 1983-07-05 to current/open; source msha-controller-operator-history