# Relationship history for MSHA mine 3609558

Current hierarchy: **Tamara L  Fetterolf; Gregory T  Fetterolf → White Horse Energy LLC → Locust Summit Strip 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:** Wally T  Fetterolf → Locust Summit Strip Mine; 2001-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** W T Fetterolf Coal Co → Locust Summit Strip Mine; 2007-08-31 to 2014-06-12; source msha-controller-operator-history
- **controller_controls_operator:** Wally T  Fetterolf → W T Fetterolf Coal Co; 2007-08-31 to 2014-06-12; source msha-controller-operator-history
- **operator_operates_mine:** White Horse Energy LLC → Locust Summit Strip Mine; 2014-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gregory T  Fetterolf et al → Locust Summit Strip Mine; 2014-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory T  Fetterolf et al → White Horse Energy LLC; 2014-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tamara L  Fetterolf et al → White Horse Energy LLC; 2014-06-13 to current/open; source msha-controller-operator-history