# Relationship history for MSHA mine 1512940

Current hierarchy: **Maynard Andy - James → Volcano Coal Inc → Kate Branch**

- 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:** D & M Coal Company Inc → Kate Branch; 1981-06-01 to 1984-07-01; source msha-controller-operator-history
- **controller_controls_mine:** Mc Coy Hobert & Verlin → Kate Branch; 1981-06-01 to 1984-07-01; source msha-controller-operator-history
- **controller_controls_operator:** Mc Coy Hobert & Verlin → D & M Coal Company Inc; 1981-06-01 to 1984-07-01; source msha-controller-operator-history
- **controller_controls_mine:** Williams Companies Inc → Kate Branch; 1982-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Guire Mike → Kate Branch; 1983-09-15 to 1985-02-10; source msha-controller-operator-history
- **operator_operates_mine:** Southern Hills Coal Company → Kate Branch; 1984-07-02 to 1985-02-10; source msha-controller-operator-history
- **controller_controls_operator:** Mc Guire Mike → Southern Hills Coal Company; 1984-07-02 to 1985-02-10; source msha-controller-operator-history
- **operator_operates_mine:** Johns Creek Elkhorn Coal Corp → Kate Branch; 1985-02-11 to 1985-04-03; source msha-controller-operator-history
- **controller_controls_operator:** Williams Companies Inc → Johns Creek Elkhorn Coal Corp; 1985-02-11 to 1985-04-03; source msha-controller-operator-history
- **operator_operates_mine:** Volcano Coal Inc → Kate Branch; 1985-04-04 to 1986-10-21; source msha-controller-operator-history
- **controller_controls_mine:** Thacker Foster → Kate Branch; 1985-04-04 to 1986-10-21; source msha-controller-operator-history
- **controller_controls_operator:** Thacker Foster → Volcano Coal Inc; 1985-04-04 to 1986-10-21; source msha-controller-operator-history
- **operator_operates_mine:** Volcano Coal Inc → Kate Branch; 1986-10-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Maynard Andy - James Et Al → Kate Branch; 1986-10-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Maynard Andy - James Et Al → Volcano Coal Inc; 1986-10-22 to current/open; source msha-controller-operator-history