# Relationship history for MSHA mine 1519356

Current hierarchy: **ACNR Holdings, Inc → Muhlenberg County Coal Resources, Inc. → Parkway Refuse**

- 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:** Armstrong Energy Inc → Parkway Refuse; 2007-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Armstrong Coal Company, Inc. → Parkway Refuse; 2008-12-22 to 2018-02-13; source msha-controller-operator-history
- **controller_controls_operator:** Armstrong Energy Inc → Armstrong Coal Company, Inc.; 2008-12-22 to 2018-02-13; source msha-controller-operator-history
- **operator_operates_mine:** The Muhlenberg County Coal Company, LLC → Parkway Refuse; 2018-02-14 to 2020-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Western Kentucky Consolidated Resources, LLC → Parkway Refuse; 2018-02-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Western Kentucky Consolidated Resources, LLC → The Muhlenberg County Coal Company, LLC; 2018-02-14 to 2020-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Muhlenberg County Coal Resources, Inc. → Parkway Refuse; 2020-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** ACNR Holdings, Inc → Parkway Refuse; 2020-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ACNR Holdings, Inc → Muhlenberg County Coal Resources, Inc.; 2020-09-17 to current/open; source msha-controller-operator-history