# Relationship history for MSHA mine 1505357

Current hierarchy: **Bolling Vince Jr → Allied Coals Inc → Allied Mine #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

- **operator_operates_mine:** Allied Coals Inc → Allied Mine #1; 1950-01-01 to 1981-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Preece John H → Allied Mine #1; 1950-01-01 to 1981-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Preece John H → Allied Coals Inc; 1950-01-01 to 1981-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Allied Coals Inc → Allied Mine #1; 1981-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bolling Vince Jr → Allied Mine #1; 1981-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bolling Vince Jr → Allied Coals Inc; 1981-04-15 to current/open; source msha-controller-operator-history