# Relationship history for MSHA mine 2700221

Current hierarchy: **CRH PLC → Pike Industries Inc → Henniker Aggregates**

- 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:** Milo L  Pike → Henniker Aggregates; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Henniker Aggregates → Henniker Aggregates; 1979-01-01 to 1985-03-05; source msha-controller-operator-history
- **controller_controls_mine:** Henniker Aggregates → Henniker Aggregates; 1979-01-01 to 1985-03-05; source msha-controller-operator-history
- **controller_controls_operator:** Henniker Aggregates → Henniker Aggregates; 1979-01-01 to 1985-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Pike Industries Inc → Henniker Aggregates; 1985-03-06 to 1988-06-01; source msha-controller-operator-history
- **controller_controls_operator:** Milo L  Pike → Pike Industries Inc; 1985-03-06 to 1988-06-01; source msha-controller-operator-history
- **operator_operates_mine:** Pike Industries Inc → Henniker Aggregates; 1988-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Henniker Aggregates; 1988-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Pike Industries Inc; 1988-06-02 to current/open; source msha-controller-operator-history