# Relationship history for MSHA mine 0404639

Current hierarchy: **Baird Charles W → Charles W Baird → Malloy**

- 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:** Mc Broom Henry C Et Al → Malloy; 1982-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mc Broom & Quigley → Malloy; 1983-04-01 to 1985-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Mc Broom Henry C Et Al → Mc Broom & Quigley; 1983-04-01 to 1985-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Charles W Baird → Malloy; 1985-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Baird Charles W → Malloy; 1985-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Baird Charles W → Charles W Baird; 1985-04-15 to current/open; source msha-controller-operator-history