# Relationship history for MSHA mine 1102787

Current hierarchy: **Michael N  Cullinan; James P  Bruner → R A Cullinan & Son Inc → Mc Knight 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

- **controller_controls_mine:** James P  Bruner et al → Mc Knight Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mc Knight Sand & Gravel → Mc Knight Pit; 1983-04-01 to 1984-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Mc Knight Clinton → Mc Knight Pit; 1983-04-01 to 1984-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Mc Knight Clinton → Mc Knight Sand & Gravel; 1983-04-01 to 1984-03-11; source msha-controller-operator-history
- **operator_operates_mine:** R A Cullinan & Son Inc → Mc Knight Pit; 1984-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James P  Bruner et al → R A Cullinan & Son Inc; 1984-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael N  Cullinan et al → R A Cullinan & Son Inc; 1984-03-12 to current/open; source msha-controller-operator-history