# Relationship history for MSHA mine 2700190

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

- 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

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