# Relationship history for MSHA mine 2500954

Current hierarchy: **J Richard  Giles → G 3 Enterprises Inc → Halsey**

- 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:** Don  Mallory → Halsey; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & K Concrete Company Inc → Halsey; 1980-03-01 to 1984-07-15; source msha-controller-operator-history
- **controller_controls_mine:** Knoell Gary M → Halsey; 1980-03-01 to 1984-07-15; source msha-controller-operator-history
- **controller_controls_operator:** Knoell Gary M → B & K Concrete Company Inc; 1980-03-01 to 1984-07-15; source msha-controller-operator-history
- **operator_operates_mine:** Don Mallory Sand & Gravel → Halsey; 1984-07-16 to 1990-11-22; source msha-controller-operator-history
- **controller_controls_operator:** Don  Mallory → Don Mallory Sand & Gravel; 1984-07-16 to 1990-11-22; source msha-controller-operator-history
- **operator_operates_mine:** G 3 Enterprises Inc → Halsey; 1990-11-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** J Richard  Giles → Halsey; 1990-11-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J Richard  Giles → G 3 Enterprises Inc; 1990-11-23 to current/open; source msha-controller-operator-history