# Relationship history for MSHA mine 4300216

Current hierarchy: **Ulric M  Norris → Ulric Norris → Farm Boy Pit**

- 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:** Raymond Cloutier → Farm Boy Pit; 1950-01-01 to 1979-09-03; source msha-controller-operator-history
- **controller_controls_mine:** Cloutier Raymond → Farm Boy Pit; 1950-01-01 to 1979-09-03; source msha-controller-operator-history
- **controller_controls_operator:** Cloutier Raymond → Raymond Cloutier; 1950-01-01 to 1979-09-03; source msha-controller-operator-history
- **operator_operates_mine:** William Sorrell Construction → Farm Boy Pit; 1979-09-04 to 1984-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Sorrell William T → Farm Boy Pit; 1979-09-04 to 1984-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Sorrell William T → William Sorrell Construction; 1979-09-04 to 1984-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Ulric Norris → Farm Boy Pit; 1984-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ulric M  Norris → Farm Boy Pit; 1984-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ulric M  Norris → Ulric Norris; 1984-05-15 to current/open; source msha-controller-operator-history