# Relationship history for MSHA mine 4608850

Current hierarchy: **Howard Russell  Morris → Blue Haven Energy Inc → No 4 Mine**

- 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:** Howard Russell  Morris → No 4 Mine; 1999-05-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Corbadd Inc → No 4 Mine; 2000-08-01 to 2001-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Richard F  Baugh → No 4 Mine; 2000-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard F  Baugh → Corbadd Inc; 2000-08-01 to 2001-03-28; source msha-controller-operator-history
- **operator_operates_mine:** Blue Haven Energy Inc → No 4 Mine; 2001-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Howard Russell  Morris → Blue Haven Energy Inc; 2001-03-29 to current/open; source msha-controller-operator-history