# Relationship history for MSHA mine 3607475

Current hierarchy: **Williams James R & Kenny-Richard Frame → W F W Partnership → Wfw #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

- **operator_operates_mine:** W F W Partnership → Wfw #1; 1983-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Williams James R & Kenny-Richard Frame → Wfw #1; 1983-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Williams James R & Kenny-Richard Frame → W F W Partnership; 1983-05-01 to current/open; source msha-controller-operator-history