# Relationship history for MSHA mine 1511815

Current hierarchy: **Infinity Coal Corp → Eclipse Collieries Inc → Eclipse Collieries Inc**

- 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:** Keither  Blackburn et al → Eclipse Collieries Inc; 1976-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Omni Coal Company → Eclipse Collieries Inc; 1979-03-01 to 1983-12-22; source msha-controller-operator-history
- **controller_controls_operator:** Keither  Blackburn et al → Omni Coal Company; 1979-03-01 to 1983-12-22; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Roberts et al → Omni Coal Company; 1979-03-01 to 1983-12-22; source msha-controller-operator-history
- **operator_operates_mine:** Sabre Big Buck Mining Of Kentucky Inc → Eclipse Collieries Inc; 1983-12-23 to 1985-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Hess Jimmie Leon Et Al → Eclipse Collieries Inc; 1983-12-23 to 1985-01-10; source msha-controller-operator-history
- **controller_controls_operator:** Hess Jimmie Leon Et Al → Sabre Big Buck Mining Of Kentucky Inc; 1983-12-23 to 1985-01-10; source msha-controller-operator-history
- **operator_operates_mine:** Omni Coal Company → Eclipse Collieries Inc; 1985-01-11 to 1993-05-23; source msha-controller-operator-history
- **controller_controls_operator:** Keither  Blackburn et al → Omni Coal Company; 1985-01-11 to 1993-05-23; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Roberts et al → Omni Coal Company; 1985-01-11 to 1993-05-23; source msha-controller-operator-history
- **controller_controls_mine:** Infinity Coal Corp → Eclipse Collieries Inc; 1993-03-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eclipse Collieries Inc → Eclipse Collieries Inc; 1993-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Infinity Coal Corp → Eclipse Collieries Inc; 1993-05-24 to current/open; source msha-controller-operator-history