# Relationship history for MSHA mine 4609380

Current hierarchy: **Tom  Evans; Victor J  Pensiero → Keystone Coal Reserves, LLC → Beacon Knob 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

- **operator_operates_mine:** Beacon Resources Inc. → Beacon Knob Mine; 2011-07-01 to 2014-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Jason R  Svonavec → Beacon Knob Mine; 2011-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason R  Svonavec → Beacon Resources Inc.; 2011-07-01 to 2014-02-24; source msha-controller-operator-history
- **operator_operates_mine:** Keystone Coal Reserves, LLC → Beacon Knob Mine; 2014-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tom  Evans et al → Beacon Knob Mine; 2014-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom  Evans et al → Keystone Coal Reserves, LLC; 2014-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Victor J  Pensiero et al → Keystone Coal Reserves, LLC; 2014-02-25 to current/open; source msha-controller-operator-history