# Relationship history for MSHA mine 3503625

Current hierarchy: **Eileen Cole  Leavens; William D Leavens → Hi Banks Rock Products Inc → Hi Banks Rock Products Inc**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Hi Banks Rock Products Inc → Hi Banks Rock Products Inc; 2005-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Phillip H  Scallon → Hi Banks Rock Products Inc; 2005-09-16 to 2015-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Phillip H  Scallon → Hi Banks Rock Products Inc; 2005-09-16 to 2015-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Eileen Cole  Leavens et al → Hi Banks Rock Products Inc; 2015-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eileen Cole  Leavens et al → Hi Banks Rock Products Inc; 2015-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William D Leavens et al → Hi Banks Rock Products Inc; 2015-04-01 to current/open; source msha-controller-operator-history