# Relationship history for MSHA mine 4608578

Current hierarchy: **Gary Wayne  Johnson → Mineclaim Inc → Topridge 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:** James G  Bryant → Topridge Surface; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bryant Mining Company Inc → Topridge Surface; 1996-06-01 to 1997-11-10; source msha-controller-operator-history
- **controller_controls_operator:** James G  Bryant → Bryant Mining Company Inc; 1996-06-01 to 1997-11-10; source msha-controller-operator-history
- **operator_operates_mine:** Royal Scot Minerals Inc → Topridge Surface; 1997-11-11 to 1998-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Rackwood Mineral Holdings Plc → Topridge Surface; 1997-11-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rackwood Mineral Holdings Plc → Royal Scot Minerals Inc; 1997-11-11 to 1998-09-15; source msha-controller-operator-history
- **operator_operates_mine:** Mineclaim Inc → Topridge Surface; 1998-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gary Wayne  Johnson → Topridge Surface; 1998-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary Wayne  Johnson → Mineclaim Inc; 1998-09-16 to current/open; source msha-controller-operator-history