# Relationship history for MSHA mine 4503317

Current hierarchy: **Amy  Davies; Paul  Davies → Callahan Ag, LLC. → Callahan 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Royal Turf Farm → Callahan Pit; 1994-05-01 to 2023-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Dean  Callahan → Callahan Pit; 1994-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dean  Callahan → Royal Turf Farm; 1994-05-01 to 2023-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Callahan Ag, LLC. → Callahan Pit; 2024-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Davies et al → Callahan Pit; 2024-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Davies et al → Callahan Ag, LLC.; 2024-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amy  Davies et al → Callahan Ag, LLC.; 2024-01-01 to current/open; source msha-controller-operator-history