# Relationship history for MSHA mine 1513025

Current hierarchy: **CONSOL Energy Inc → Consol Of Kentucky Inc → Wiley Surface**

- 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:** Wiley Coal Company → Wiley Surface; 1981-07-01 to 1984-04-01; source msha-controller-operator-history
- **controller_controls_mine:** General Electric Company → Wiley Surface; 1981-07-01 to 1984-04-01; source msha-controller-operator-history
- **controller_controls_operator:** General Electric Company → Wiley Coal Company; 1981-07-01 to 1984-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Sierra Coal Company → Wiley Surface; 1984-04-02 to 1986-07-30; source msha-controller-operator-history
- **controller_controls_mine:** BHP Billiton → Wiley Surface; 1984-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** BHP Billiton → Sierra Coal Company; 1984-04-02 to 1986-07-30; source msha-controller-operator-history
- **operator_operates_mine:** Consol Of Kentucky Inc → Wiley Surface; 1986-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Wiley Surface; 1986-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Consol Of Kentucky Inc; 1986-07-31 to current/open; source msha-controller-operator-history