# Relationship history for MSHA mine 0102771

Current hierarchy: **NACCO Industries Inc → New Acton Coal Mining Company Inc → Friday'S Crossing**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Reid Dolores → Friday'S Crossing; 1982-02-01 to 2002-09-30; source msha-controller-operator-history
- **operator_operates_mine:** New Acton Coal Mining Company Inc → Friday'S Crossing; 1988-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reid Dolores → New Acton Coal Mining Company Inc; 1988-07-01 to 2002-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Robert J  Reed Sr → Friday'S Crossing; 2002-10-01 to 2012-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Robert J  Reed Sr → New Acton Coal Mining Company Inc; 2002-10-01 to 2012-08-31; source msha-controller-operator-history
- **controller_controls_mine:** TRU Energy Services LLC → Friday'S Crossing; 2012-09-01 to 2012-10-29; source msha-controller-operator-history
- **controller_controls_operator:** TRU Energy Services LLC → New Acton Coal Mining Company Inc; 2012-09-01 to 2012-10-29; source msha-controller-operator-history
- **controller_controls_mine:** NACCO Industries Inc → Friday'S Crossing; 2012-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** NACCO Industries Inc → New Acton Coal Mining Company Inc; 2012-10-30 to current/open; source msha-controller-operator-history