# Relationship history for MSHA mine 4607846

Current hierarchy: **Carpenter M Wesley → E F A Inc → Point Mountain Surface**

- 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:** Carpenter M Wesley → Point Mountain Surface; 1987-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** E F A Inc → Point Mountain Surface; 1990-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carpenter M Wesley → E F A Inc; 1990-02-01 to current/open; source msha-controller-operator-history