# Relationship history for MSHA mine 3001254

Current hierarchy: **CRH PLC → Dolomite Group → MANCHESTER PLANT**

- 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:** John M  Odenbach → MANCHESTER PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Concrete Materials Inc → MANCHESTER PLANT; 1950-01-01 to 1986-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Hague Peter R → MANCHESTER PLANT; 1950-01-01 to 1986-12-28; source msha-controller-operator-history
- **controller_controls_operator:** Hague Peter R → Concrete Materials Inc; 1950-01-01 to 1986-03-18; source msha-controller-operator-history
- **operator_operates_mine:** Dolomite Products Company Inc → MANCHESTER PLANT; 1986-03-19 to 2000-06-13; source msha-controller-operator-history
- **controller_controls_operator:** John M  Odenbach → Dolomite Products Company Inc; 1986-03-19 to 2000-06-13; source msha-controller-operator-history
- **operator_operates_mine:** Dolomite Products Company Inc → MANCHESTER PLANT; 2000-06-14 to 2002-09-08; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → MANCHESTER PLANT; 2000-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Dolomite Products Company Inc; 2000-06-14 to 2002-09-08; source msha-controller-operator-history
- **operator_operates_mine:** Dolomite Group → MANCHESTER PLANT; 2002-09-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Dolomite Group; 2002-09-09 to current/open; source msha-controller-operator-history