# Relationship history for MSHA mine 3303632

Current hierarchy: **Humphrey William → Lominco Inc → Musky Pit**

- 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:** Humphrey William → Musky Pit; 1976-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lyle Construction Inc → Musky Pit; 1977-07-01 to 1979-08-01; source msha-controller-operator-history
- **controller_controls_mine:** Lyle Don W → Musky Pit; 1977-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lyle Don W → Lyle Construction Inc; 1977-07-01 to 1979-08-01; source msha-controller-operator-history
- **operator_operates_mine:** Lominco Inc → Musky Pit; 1979-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Humphrey William → Lominco Inc; 1979-08-02 to current/open; source msha-controller-operator-history