# Relationship history for MSHA mine 1102612

Current hierarchy: **Behm Herman → Blue Flame Coal Company Inc → Blue Flame Coal Co Mine (Culm)**

- 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:** Blue Flame Coal Company → Blue Flame Coal Co Mine (Culm); 1977-08-01 to 1978-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Ferrell Kenneth → Blue Flame Coal Co Mine (Culm); 1977-08-01 to 1978-05-09; source msha-controller-operator-history
- **controller_controls_operator:** Ferrell Kenneth → Blue Flame Coal Company; 1977-08-01 to 1978-05-09; source msha-controller-operator-history
- **operator_operates_mine:** Blue Flame Coal Company Inc → Blue Flame Coal Co Mine (Culm); 1978-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Behm Herman → Blue Flame Coal Co Mine (Culm); 1978-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Behm Herman → Blue Flame Coal Company Inc; 1978-05-10 to current/open; source msha-controller-operator-history