# Relationship history for MSHA mine 1513138

Current hierarchy: **Leroy  Lackey → Black Eagle Coal Company Inc → No 1**

- 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

- **operator_operates_mine:** Blackey Elkhorn Coal Mining Company Inc → No 1; 1981-10-01 to 1981-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Mc Gowan Frank B & Leroy Lackey Jr → No 1; 1981-10-01 to 1981-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Mc Gowan Frank B & Leroy Lackey Jr → Blackey Elkhorn Coal Mining Company Inc; 1981-10-01 to 1981-11-08; source msha-controller-operator-history
- **operator_operates_mine:** Blackey Elkhorn Coal Mining Company Inc → No 1; 1981-11-09 to 1983-09-21; source msha-controller-operator-history
- **controller_controls_mine:** Jamestown Resources Inc → No 1; 1981-11-09 to 1983-09-21; source msha-controller-operator-history
- **controller_controls_operator:** Jamestown Resources Inc → Blackey Elkhorn Coal Mining Company Inc; 1981-11-09 to 1983-09-21; source msha-controller-operator-history
- **operator_operates_mine:** Black Eagle Coal Company Inc → No 1; 1983-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leroy  Lackey et al → No 1; 1983-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leroy  Lackey et al → Black Eagle Coal Company Inc; 1983-09-22 to current/open; source msha-controller-operator-history