# Relationship history for MSHA mine 2401879

Current hierarchy: **Sibanye Stillwater Limited → Stillwater Mining Company → EAST BOULDER MINE**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Manville Corp Et Al → EAST BOULDER MINE; 1980-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stillwater Pgm Resources → EAST BOULDER MINE; 1990-05-01 to 1996-09-04; source msha-controller-operator-history
- **controller_controls_operator:** Manville Corp Et Al → Stillwater Pgm Resources; 1990-05-01 to 1996-09-04; source msha-controller-operator-history
- **controller_controls_mine:** Stillwater Mining Company → EAST BOULDER MINE; 1996-09-04 to 2017-05-03; source msha-controller-operator-history
- **operator_operates_mine:** Stillwater Mining Company → EAST BOULDER MINE; 1996-09-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stillwater Mining Company → Stillwater Mining Company; 1996-09-05 to 2017-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Sibanye Stillwater Limited → EAST BOULDER MINE; 2017-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sibanye Stillwater Limited → Stillwater Mining Company; 2017-05-04 to current/open; source msha-controller-operator-history