# Relationship history for MSHA mine 4000578

Current hierarchy: **Nunley James Earl → 3-N Coal Company → No 23**

- 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:** Chestnut Coal Company Inc → No 23; 1950-01-01 to 1976-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Tennessee Consolidated Coal Company Inc → No 23; 1950-01-01 to 1976-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Tennessee Consolidated Coal Company Inc → Chestnut Coal Company Inc; 1950-01-01 to 1976-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Chestnut Coal Company Inc → No 23; 1976-09-01 to 1983-12-22; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → No 23; 1976-09-01 to 1983-12-22; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Chestnut Coal Company Inc; 1976-09-01 to 1983-12-22; source msha-controller-operator-history
- **operator_operates_mine:** J T Meeks Mining Inc → No 23; 1983-12-23 to 1984-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Meeks J T → No 23; 1983-12-23 to 1984-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Meeks J T → J T Meeks Mining Inc; 1983-12-23 to 1984-07-19; source msha-controller-operator-history
- **operator_operates_mine:** 3-N Coal Company → No 23; 1984-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nunley James Earl → No 23; 1984-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nunley James Earl → 3-N Coal Company; 1984-07-20 to current/open; source msha-controller-operator-history