# Relationship history for MSHA mine 3604701

Current hierarchy: **Kennedy Abraham → A Kennedy Coal Company → #2 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:** Kennedy Ronald V Et Al → #2 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kennedy Coal Company → #2 Mine; 1973-01-01 to 1988-03-24; source msha-controller-operator-history
- **controller_controls_operator:** Kennedy Ronald V Et Al → Kennedy Coal Company; 1973-01-01 to 1988-03-24; source msha-controller-operator-history
- **operator_operates_mine:** Kennedy Coal Company → #2 Mine; 1988-03-25 to 1991-01-23; source msha-controller-operator-history
- **controller_controls_mine:** Keslar Robert S → #2 Mine; 1988-03-25 to 1991-01-23; source msha-controller-operator-history
- **controller_controls_operator:** Keslar Robert S → Kennedy Coal Company; 1988-03-25 to 1991-01-23; source msha-controller-operator-history
- **operator_operates_mine:** A Kennedy Coal Company → #2 Mine; 1991-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kennedy Abraham → #2 Mine; 1991-01-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kennedy Abraham → A Kennedy Coal Company; 1991-01-24 to current/open; source msha-controller-operator-history