# Relationship history for MSHA mine 3600958

Current hierarchy: **ACNR Holdings, Inc → Washington County Land Resources, Inc. → Mine 84**

- 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:** Beth Energy Mines Inc → Mine 84; 1950-01-01 to 1992-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Bethlehem Steel Corp → Mine 84; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bethlehem Steel Corp → Beth Energy Mines Inc; 1950-01-01 to 1992-12-29; source msha-controller-operator-history
- **operator_operates_mine:** Eighty-Four Mining Company → Mine 84; 1992-12-30 to 1998-09-29; source msha-controller-operator-history
- **controller_controls_mine:** Rochester & Pittsburgh Coal Company → Mine 84; 1992-12-30 to 1998-09-29; source msha-controller-operator-history
- **controller_controls_operator:** Rochester & Pittsburgh Coal Company → Eighty-Four Mining Company; 1992-12-30 to 1998-09-29; source msha-controller-operator-history
- **operator_operates_mine:** Eighty Four Mining Company → Mine 84; 1998-09-30 to 2020-09-16; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Mine 84; 1998-09-30 to 2013-12-04; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Eighty Four Mining Company; 1998-09-30 to 2013-12-04; source msha-controller-operator-history
- **operator_operates_mine:** Washington County Land Resources, Inc. → Mine 84; 2020-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** ACNR Holdings, Inc → Mine 84; 2020-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ACNR Holdings, Inc → Washington County Land Resources, Inc.; 2020-09-17 to current/open; source msha-controller-operator-history