# Relationship history for MSHA mine 4001813

Current hierarchy: **Nunley James Earl → Jen Inc → No 30**

- 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

- **controller_controls_mine:** Tennessee Consolidated Coal Company Inc → No 30; 1950-01-01 to 1976-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Alton → No 30; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Ernie → No 30; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Grundy Mining Company Inc → No 30; 1975-12-01 to 1976-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Tennessee Consolidated Coal Company Inc → Grundy Mining Company Inc; 1975-12-01 to 1976-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Tennessee Consolidated Coal Company → No 30; 1976-09-01 to 1987-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → No 30; 1976-09-01 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Tennessee Consolidated Coal Company; 1976-09-01 to 1987-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Mary Lee Coal Company Inc → No 30; 1987-07-15 to 1990-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Alton → Mary Lee Coal Company Inc; 1987-07-15 to 1990-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Layne Buddy G → No 30; 1988-02-19 to 1992-06-04; source msha-controller-operator-history
- **operator_operates_mine:** Mary Lee Coal Company Inc → No 30; 1990-04-30 to 1991-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Ernie → Mary Lee Coal Company Inc; 1990-04-30 to 1991-04-04; source msha-controller-operator-history
- **operator_operates_mine:** B G L Mining Company Inc → No 30; 1991-04-05 to 1992-05-28; source msha-controller-operator-history
- **controller_controls_operator:** Layne Buddy G → B G L Mining Company Inc; 1991-04-05 to 1992-05-28; source msha-controller-operator-history
- **controller_controls_mine:** Nunley James Earl → No 30; 1991-10-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jen Inc → No 30; 1992-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nunley James Earl → Jen Inc; 1992-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → No 30; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Tennessee Consolidated Coal Company; 2011-06-01 to 1987-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → No 30; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Tennessee Consolidated Coal Company; 2016-07-26 to 1987-07-14; source msha-controller-operator-history