# Relationship history for MSHA mine 2700069

Current hierarchy: **CRH PLC → Pike Industries Inc → TILTON SAND & GRAVEL (C613)**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Tilton Sand & Gravel Inc → TILTON SAND & GRAVEL (C613); 1950-01-01 to 1986-11-24; source msha-controller-operator-history
- **controller_controls_mine:** Arthur Whitcomb Inc → TILTON SAND & GRAVEL (C613); 1950-01-01 to 1986-11-24; source msha-controller-operator-history
- **controller_controls_operator:** Arthur Whitcomb Inc → Tilton Sand & Gravel Inc; 1950-01-01 to 1986-11-24; source msha-controller-operator-history
- **operator_operates_mine:** Tilton Sand & Gravel Inc → TILTON SAND & GRAVEL (C613); 1986-11-25 to 1996-12-31; source msha-controller-operator-history
- **controller_controls_mine:** BTR PLC → TILTON SAND & GRAVEL (C613); 1986-11-25 to 1996-12-31; source msha-controller-operator-history
- **controller_controls_operator:** BTR PLC → Tilton Sand & Gravel Inc; 1986-11-25 to 1996-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → TILTON SAND & GRAVEL (C613); 1988-06-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pike Industries Inc → TILTON SAND & GRAVEL (C613); 1997-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Pike Industries Inc; 1997-01-01 to current/open; source msha-controller-operator-history