# Relationship history for MSHA mine 3102039

Current hierarchy: **CRH PLC → Harrison Construction Co Div/ APAC-Atlantic Inc → Mission Quarry**

- 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:** Rabco → Mission Quarry; 1989-04-01 to 2002-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Robin A  Bryan → Mission Quarry; 1989-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robin A  Bryan → Rabco; 1989-04-01 to 2002-12-29; source msha-controller-operator-history
- **controller_controls_mine:** Randy  Jordan et al → Mission Quarry; 2000-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Western Materials, Inc. → Mission Quarry; 2002-12-30 to 2008-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Jordan et al → Western Materials, Inc.; 2002-12-30 to 2008-06-15; source msha-controller-operator-history
- **controller_controls_operator:** William T  Phillips Sr et al → Western Materials, Inc.; 2002-12-30 to 2008-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc → Mission Quarry; 2003-04-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Mission Quarry; 2006-08-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harrison Construction Co Div/ APAC-Atlantic Inc → Mission Quarry; 2008-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Harrison Construction Co Div/ APAC-Atlantic Inc; 2008-06-16 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Harrison Construction Co Div/ APAC-Atlantic Inc; 2008-06-16 to current/open; source msha-controller-operator-history