# Relationship history for MSHA mine 3606068

Current hierarchy: **Felton Clifford → Felton Enterprises Inc → Felton Strip**

- 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:** Felton Clifford → Felton Strip; 1975-05-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Felton Enterprises Inc → Felton Strip; 1976-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Felton Clifford → Felton Enterprises Inc; 1976-04-29 to current/open; source msha-controller-operator-history