# Relationship history for MSHA mine 0102044

Current hierarchy: **Smith John Titus → Little Texas Energy → Fern Springs**

- 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:** Nabala Coal Company Inc → Fern Springs; 1978-12-01 to 1982-10-12; source msha-controller-operator-history
- **controller_controls_mine:** Charles R  Smith → Fern Springs; 1978-12-01 to 1984-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Charles R  Smith → Nabala Coal Company Inc; 1978-12-01 to 1982-10-12; source msha-controller-operator-history
- **operator_operates_mine:** Morin & Bass Inc → Fern Springs; 1982-10-13 to 1983-01-26; source msha-controller-operator-history
- **controller_controls_mine:** Bass Ray D → Fern Springs; 1982-10-13 to 1983-01-26; source msha-controller-operator-history
- **controller_controls_operator:** Bass Ray D → Morin & Bass Inc; 1982-10-13 to 1983-01-26; source msha-controller-operator-history
- **operator_operates_mine:** Nabala Coal Company Inc → Fern Springs; 1983-01-27 to 1984-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Charles R  Smith → Nabala Coal Company Inc; 1983-01-27 to 1984-08-19; source msha-controller-operator-history
- **operator_operates_mine:** Little Texas Energy → Fern Springs; 1984-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Smith John Titus → Fern Springs; 1984-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith John Titus → Little Texas Energy; 1984-08-20 to current/open; source msha-controller-operator-history