# Relationship history for MSHA mine 3101849

Current hierarchy: **CRH PLC → Apac-Atlantic Inc Coastal Carolina Division → Allen Pit**

- 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:** Ashland Inc → Allen Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Barrus Construction Company → Allen Pit; 1979-01-01 to 2003-08-18; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Barrus Construction Company; 1979-01-01 to 2003-08-18; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc → Allen Pit; 2003-04-01 to 2006-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Apac-Atlantic Inc Coastal Carolina Division → Allen Pit; 2003-08-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Apac-Atlantic Inc Coastal Carolina Division; 2003-08-19 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Allen Pit; 2006-08-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Apac-Atlantic Inc Coastal Carolina Division; 2006-08-28 to current/open; source msha-controller-operator-history