# Relationship history for MSHA mine 4609111

Current hierarchy: **Alpha Metallurgical Resources Inc → Nicholas-Contura, LLC → Rolling Thunder 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:** Donn A  Chickering → Rolling Thunder Mine; 2002-02-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Peachtree Ridge Mining Company, Inc. → Rolling Thunder Mine; 2005-08-01 to 2022-08-29; source msha-controller-operator-history
- **controller_controls_operator:** Donn A  Chickering → Peachtree Ridge Mining Company, Inc.; 2005-08-01 to 2022-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → Rolling Thunder Mine; 2016-07-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nicholas-Contura, LLC → Rolling Thunder Mine; 2022-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Nicholas-Contura, LLC; 2022-08-30 to current/open; source msha-controller-operator-history