# Relationship history for MSHA mine 1511232

Current hierarchy: **Gary  Adkins → Silver Dollar Coal Company Inc → No 1**

- 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:** Belcher Jack R & Bobby Merrett → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Black Nuggett Coal Company → No 1; 1978-04-01 to 1983-08-15; source msha-controller-operator-history
- **controller_controls_operator:** Belcher Jack R & Bobby Merrett → Black Nuggett Coal Company; 1978-04-01 to 1983-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Silver Dollar Coal Company Inc → No 1; 1983-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary  Adkins → No 1; 1983-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Adkins → Silver Dollar Coal Company Inc; 1983-08-16 to current/open; source msha-controller-operator-history