# Relationship history for MSHA mine 4503576

Current hierarchy: **Dustin T  Mahaffey → Mahaffey Ent. Inc. → Clodfelter Quarry**

- 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:** Mahaffey Ent. Inc. → Clodfelter Quarry; 2005-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dustin T  Mahaffey et al → Clodfelter Quarry; 2005-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dustin T  Mahaffey et al → Mahaffey Ent. Inc.; 2005-03-23 to current/open; source msha-controller-operator-history