# Relationship history for MSHA mine 1513265

Current hierarchy: **Walters Jeff → J & W Coal Company Corp → Mine #1**

- 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:** Empire Mining → Mine #1; 1981-12-01 to 1985-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Walters Jeff Et Al → Mine #1; 1981-12-01 to 1985-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Walters Jeff Et Al → Empire Mining; 1981-12-01 to 1985-01-31; source msha-controller-operator-history
- **operator_operates_mine:** J & W Coal Company Corp → Mine #1; 1985-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Walters Jeff Et Al → Mine #1; 1985-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walters Jeff Et Al → J & W Coal Company Corp; 1985-02-01 to current/open; source msha-controller-operator-history