# Relationship history for MSHA mine 1511588

Current hierarchy: **Tackett Gary D & Robert Compton → Little Bryan Coal Company → No 1 Mine**

- 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:** Wagner Coal Company → No 1 Mine; 1978-09-01 to 1979-10-25; source msha-controller-operator-history
- **controller_controls_mine:** Wagner Gordon M-Roger & Toby → No 1 Mine; 1978-09-01 to 1979-10-25; source msha-controller-operator-history
- **controller_controls_operator:** Wagner Gordon M-Roger & Toby → Wagner Coal Company; 1978-09-01 to 1979-10-25; source msha-controller-operator-history
- **operator_operates_mine:** Evkin Coal Corp → No 1 Mine; 1979-10-26 to 1980-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Evans Chester → No 1 Mine; 1979-10-26 to 1980-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Evans Chester → Evkin Coal Corp; 1979-10-26 to 1980-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Galveston Coal Company Inc → No 1 Mine; 1980-04-30 to 1981-09-29; source msha-controller-operator-history
- **controller_controls_mine:** Hamby Charles T Et Al → No 1 Mine; 1980-04-30 to 1981-09-29; source msha-controller-operator-history
- **controller_controls_operator:** Hamby Charles T Et Al → Galveston Coal Company Inc; 1980-04-30 to 1981-09-29; source msha-controller-operator-history
- **controller_controls_mine:** Vaughn Estille & Dennis R Caldwell → No 1 Mine; 1981-09-01 to 1983-10-04; source msha-controller-operator-history
- **operator_operates_mine:** Kaynan Enterprises Inc → No 1 Mine; 1981-09-30 to 1983-10-04; source msha-controller-operator-history
- **controller_controls_operator:** Vaughn Estille & Dennis R Caldwell → Kaynan Enterprises Inc; 1981-09-30 to 1983-10-04; source msha-controller-operator-history
- **operator_operates_mine:** Little Bryan Coal Company → No 1 Mine; 1983-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tackett Gary D & Robert Compton → No 1 Mine; 1983-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tackett Gary D & Robert Compton → Little Bryan Coal Company; 1983-10-05 to current/open; source msha-controller-operator-history