# Relationship history for MSHA mine 3401654

Current hierarchy: **Beaver County-Ok → Beaver County → DIST #1**

- 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:** Beaver County-Ok → DIST #1; 1987-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Davis Gravel → DIST #1; 1988-08-01 to 2001-03-06; source msha-controller-operator-history
- **controller_controls_mine:** Davis Jerry → DIST #1; 1988-08-01 to 2001-03-06; source msha-controller-operator-history
- **controller_controls_operator:** Davis Jerry → Davis Gravel; 1988-08-01 to 2001-03-06; source msha-controller-operator-history
- **operator_operates_mine:** Beaver County → DIST #1; 2001-03-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Beaver County-Ok → Beaver County; 2001-03-07 to current/open; source msha-controller-operator-history