# Relationship history for MSHA mine 4502855

Current hierarchy: **Moore Jim → Rocky Mines → Silver Bell**

- 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:** Fausett Lovon → Silver Bell; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wallace Diamond Drill Company Inc → Silver Bell; 1980-09-01 to 1981-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Fausett Lovon → Wallace Diamond Drill Company Inc; 1980-09-01 to 1981-09-15; source msha-controller-operator-history
- **operator_operates_mine:** Little Bullion Company → Silver Bell; 1981-09-16 to 1983-01-13; source msha-controller-operator-history
- **controller_controls_mine:** Eddington Corey & Steve Neilson → Silver Bell; 1981-09-16 to 1983-01-13; source msha-controller-operator-history
- **controller_controls_operator:** Eddington Corey & Steve Neilson → Little Bullion Company; 1981-09-16 to 1983-01-13; source msha-controller-operator-history
- **operator_operates_mine:** Rocky Mines → Silver Bell; 1983-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Moore Jim → Silver Bell; 1983-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Moore Jim → Rocky Mines; 1983-01-14 to current/open; source msha-controller-operator-history