# Relationship history for MSHA mine 1201849

Current hierarchy: **Hughey Paul B → Hesco Inc → Hendricks #5**

- 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:** Sargent Harold E → Hendricks #5; 1980-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hesco Inc → Hendricks #5; 1981-07-01 to 1982-11-07; source msha-controller-operator-history
- **controller_controls_operator:** Sargent Harold E → Hesco Inc; 1981-07-01 to 1982-11-07; source msha-controller-operator-history
- **operator_operates_mine:** Hesco Inc → Hendricks #5; 1982-11-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hughey Paul B → Hendricks #5; 1982-11-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hughey Paul B → Hesco Inc; 1982-11-08 to current/open; source msha-controller-operator-history