# Relationship history for MSHA mine 0900366

Current hierarchy: **Sued-Chemie AG → Southern Talc Company → Earnest 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Sued-Chemie AG → Earnest Mine; 1986-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Boundary Creek Mining → Earnest Mine; 1986-08-01 to 1988-06-07; source msha-controller-operator-history
- **controller_controls_mine:** James E  Hallam  et al → Earnest Mine; 1986-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James E  Hallam  et al → Boundary Creek Mining; 1986-08-01 to 1988-06-07; source msha-controller-operator-history
- **controller_controls_operator:** Daniel  Boggs  et al → Boundary Creek Mining; 1986-08-01 to 1988-06-07; source msha-controller-operator-history
- **operator_operates_mine:** Southern Talc Company → Earnest Mine; 1988-06-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sued-Chemie AG → Southern Talc Company; 1988-06-08 to current/open; source msha-controller-operator-history