# Relationship history for MSHA mine 1516191

Current hierarchy: **Vance Clell P → Vance Splint Coal Company Inc → 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:** Christian Michael Et Al → 1; 1985-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M & F Coal Company → 1; 1987-10-01 to 1988-11-28; source msha-controller-operator-history
- **controller_controls_operator:** Christian Michael Et Al → M & F Coal Company; 1987-10-01 to 1988-11-28; source msha-controller-operator-history
- **operator_operates_mine:** Vance Splint Coal Company Inc → 1; 1988-11-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vance Clell P Et Al → 1; 1988-11-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vance Clell P Et Al → Vance Splint Coal Company Inc; 1988-11-29 to current/open; source msha-controller-operator-history