# Relationship history for MSHA mine 3401423

Current hierarchy: **Kinsey Doyal L → Kinsey Sand & Gravel → Kinsey Sand And Gravel**

- 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:** Nelson Sand & Gravel → Kinsey Sand And Gravel; 1983-11-01 to 1985-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Nelson E C → Kinsey Sand And Gravel; 1983-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nelson E C → Nelson Sand & Gravel; 1983-11-01 to 1985-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Kinsey Sand & Gravel → Kinsey Sand And Gravel; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kinsey Doyal L → Kinsey Sand And Gravel; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kinsey Doyal L → Kinsey Sand & Gravel; 1985-07-01 to current/open; source msha-controller-operator-history