# Relationship history for MSHA mine 1509724

Current hierarchy: **Lexington Coal Holdings, Inc → Lexington Coal Company, LLC → Winifrede Surface 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

- **controller_controls_mine:** Moore McCormack Resources Inc → Winifrede Surface Mine; 1974-01-01 to 1980-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Leslie Coal Mining Company → Winifrede Surface Mine; 1976-05-27 to 1980-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Moore McCormack Resources Inc → Leslie Coal Mining Company; 1976-05-27 to 1980-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Leslie Coal Mining Company → Winifrede Surface Mine; 1981-01-01 to 1984-10-09; source msha-controller-operator-history
- **controller_controls_mine:** Carolina Power & Light Company → Winifrede Surface Mine; 1981-01-01 to 1984-10-09; source msha-controller-operator-history
- **controller_controls_operator:** Carolina Power & Light Company → Leslie Coal Mining Company; 1981-01-01 to 1984-10-09; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Winifrede Surface Mine; 1984-10-04 to 2011-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Sidney Coal Company LLC → Winifrede Surface Mine; 1984-10-10 to 2017-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Sidney Coal Company LLC; 1984-10-10 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Winifrede Surface Mine; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Sidney Coal Company LLC; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Winifrede Surface Mine; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Sidney Coal Company LLC; 2016-07-26 to 2017-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Lexington Coal Company, LLC → Winifrede Surface Mine; 2017-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lexington Coal Holdings, Inc → Winifrede Surface Mine; 2017-10-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lexington Coal Holdings, Inc → Lexington Coal Company, LLC; 2017-10-23 to current/open; source msha-controller-operator-history