# Relationship history for MSHA mine 3102164

Current hierarchy: **CRH PLC → Harrison Aggregates → Massey Branch 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Western Materials, Inc. → Massey Branch Quarry; 2000-11-01 to 2008-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Randy  Jordan et al → Massey Branch Quarry; 2000-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Jordan et al → Western Materials, Inc.; 2000-11-01 to 2008-06-15; source msha-controller-operator-history
- **controller_controls_operator:** William T  Phillips Sr et al → Western Materials, Inc.; 2000-11-01 to 2008-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc → Massey Branch Quarry; 2003-04-01 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Massey Branch Quarry; 2006-08-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harrison Aggregates → Massey Branch Quarry; 2008-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc → Harrison Aggregates; 2008-06-16 to 2006-08-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Harrison Aggregates; 2008-06-16 to current/open; source msha-controller-operator-history