# Relationship history for MSHA mine 4002115

Current hierarchy: **Nunley James Earl → James Earl Nunley Coal Company → Sunshine**

- 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:** Nunley James Earl → Sunshine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Murphy Argo Coal Company → Sunshine; 1976-06-30 to 1978-05-16; source msha-controller-operator-history
- **controller_controls_mine:** Argo Murphy → Sunshine; 1976-06-30 to 1978-05-16; source msha-controller-operator-history
- **controller_controls_operator:** Argo Murphy → Murphy Argo Coal Company; 1976-06-30 to 1978-05-16; source msha-controller-operator-history
- **operator_operates_mine:** Layne & Higgins Coal Company → Sunshine; 1978-05-17 to 1980-01-15; source msha-controller-operator-history
- **controller_controls_mine:** Layne Don → Sunshine; 1978-05-17 to 1980-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Layne Don → Layne & Higgins Coal Company; 1978-05-17 to 1980-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Larry Layne Coal Company → Sunshine; 1980-01-16 to 1981-03-25; source msha-controller-operator-history
- **controller_controls_mine:** Layne Larry → Sunshine; 1980-01-16 to 1981-03-25; source msha-controller-operator-history
- **controller_controls_operator:** Layne Larry → Larry Layne Coal Company; 1980-01-16 to 1981-03-25; source msha-controller-operator-history
- **operator_operates_mine:** Nunley & Greene Coal Company → Sunshine; 1981-03-26 to 1982-04-21; source msha-controller-operator-history
- **controller_controls_mine:** Nunley Glen B & Tony Greene → Sunshine; 1981-03-26 to 1982-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Nunley Glen B & Tony Greene → Nunley & Greene Coal Company; 1981-03-26 to 1982-04-21; source msha-controller-operator-history
- **operator_operates_mine:** James Earl Nunley Coal Company → Sunshine; 1982-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nunley James Earl → James Earl Nunley Coal Company; 1982-04-22 to current/open; source msha-controller-operator-history