# Relationship history for MSHA mine 1502531

Current hierarchy: **Conn Eddie → Betty Ray Coal Company → No 10 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Conn Eddie → No 10 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Betty Ray Coal Company → No 10 Mine; 1970-04-01 to 1972-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Conn Eddie → Betty Ray Coal Company; 1970-04-01 to 1972-02-28; source msha-controller-operator-history
- **operator_operates_mine:** J & R Coal Company → No 10 Mine; 1972-03-01 to 1972-09-12; source msha-controller-operator-history
- **controller_controls_mine:** Lawson Junior → No 10 Mine; 1972-03-01 to 1972-09-12; source msha-controller-operator-history
- **controller_controls_operator:** Lawson Junior → J & R Coal Company; 1972-03-01 to 1972-09-12; source msha-controller-operator-history
- **operator_operates_mine:** Betty Ray Coal Company → No 10 Mine; 1972-09-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Conn Eddie → Betty Ray Coal Company; 1972-09-13 to current/open; source msha-controller-operator-history