# Relationship history for MSHA mine 2601575

Current hierarchy: **Watterson Jack-Austin Belnap → Grey Eagle Gold & Silver → Grey Eagle**

- 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

- **operator_operates_mine:** Ludwig Mining Company → Grey Eagle; 1979-11-01 to 1980-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Ludwig Mining Company → Grey Eagle; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ludwig Mining Company → Ludwig Mining Company; 1979-11-01 to 1980-05-18; source msha-controller-operator-history
- **operator_operates_mine:** Grey Eagle Mines Ltd → Grey Eagle; 1980-05-19 to 1983-07-20; source msha-controller-operator-history
- **controller_controls_mine:** Davies Ernest A → Grey Eagle; 1980-05-19 to 1983-07-20; source msha-controller-operator-history
- **controller_controls_operator:** Davies Ernest A → Grey Eagle Mines Ltd; 1980-05-19 to 1983-07-20; source msha-controller-operator-history
- **operator_operates_mine:** S/L Corp → Grey Eagle; 1983-07-21 to 1983-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Sack Roger D → Grey Eagle; 1983-07-21 to 1983-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Sack Roger D → S/L Corp; 1983-07-21 to 1983-12-27; source msha-controller-operator-history
- **operator_operates_mine:** Grey Eagle Gold & Silver → Grey Eagle; 1983-12-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Watterson Jack-Austin Belnap Et Al → Grey Eagle; 1983-12-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Watterson Jack-Austin Belnap Et Al → Grey Eagle Gold & Silver; 1983-12-28 to current/open; source msha-controller-operator-history