# Relationship history for MSHA mine 1512401

Current hierarchy: **Isaac Morris & Virgil Jr → Queen Mining Company Inc → No 1 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Little H Coal Company → No 1 Mine; 1980-06-01 to 1982-01-27; source msha-controller-operator-history
- **controller_controls_mine:** Reed Sherley Et Al → No 1 Mine; 1980-06-01 to 1983-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Reed Sherley Et Al → Little H Coal Company; 1980-06-01 to 1982-01-27; source msha-controller-operator-history
- **operator_operates_mine:** Bonanza Enterprises Inc → No 1 Mine; 1982-01-28 to 1982-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Cordial → No 1 Mine; 1982-01-28 to 1982-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Cordial → Bonanza Enterprises Inc; 1982-01-28 to 1982-03-23; source msha-controller-operator-history
- **operator_operates_mine:** Little H Coal Company → No 1 Mine; 1982-03-24 to 1983-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Reed Sherley Et Al → Little H Coal Company; 1982-03-24 to 1983-02-24; source msha-controller-operator-history
- **operator_operates_mine:** Queen Mining Company Inc → No 1 Mine; 1983-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Isaac Morris & Virgil Jr Et Al → No 1 Mine; 1983-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Isaac Morris & Virgil Jr Et Al → Queen Mining Company Inc; 1983-02-25 to current/open; source msha-controller-operator-history