# Relationship history for MSHA mine 4607231

Current hierarchy: **Sammons James → Big Sandy Reclamation Inc → No 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

- **controller_controls_mine:** Clevenger Mark → No 1; 1986-04-14 to 1993-01-14; source msha-controller-operator-history
- **operator_operates_mine:** V & W Dredging → No 1; 1986-11-01 to 1993-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Clevenger Mark → V & W Dredging; 1986-11-01 to 1993-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Sammons James Et Al → No 1; 1991-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Sandy Reclamation Inc → No 1; 1993-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sammons James Et Al → Big Sandy Reclamation Inc; 1993-01-15 to current/open; source msha-controller-operator-history