# Relationship history for MSHA mine 2700326

Current hierarchy: **Thomas  Patenaude → Henniker Sand & Gravel Company Inc → HENNIKER PIT & MILL PORTABLE CRU**

- 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

- **controller_controls_mine:** Rodney  Patenaude → HENNIKER PIT & MILL PORTABLE CRU; 1950-01-01 to 2014-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Henniker Sand & Gravel Company Inc → HENNIKER PIT & MILL PORTABLE CRU; 1997-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rodney  Patenaude → Henniker Sand & Gravel Company Inc; 1997-10-01 to 2014-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Patenaude → HENNIKER PIT & MILL PORTABLE CRU; 2014-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Patenaude → Henniker Sand & Gravel Company Inc; 2014-12-01 to current/open; source msha-controller-operator-history