# Relationship history for MSHA mine 3503709

Current hierarchy: **Eileen Cole  Leavens; William D Leavens → L&S Rock Products → Stanley Pit**

- 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:** Phillip H  Scallon → Stanley Pit; 2005-09-16 to 2015-03-31; source msha-controller-operator-history
- **operator_operates_mine:** L&S Rock Products → Stanley Pit; 2008-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Phillip H  Scallon → L&S Rock Products; 2008-09-16 to 2015-03-31; source msha-controller-operator-history
- **controller_controls_mine:** William D Leavens et al → Stanley Pit; 2015-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William D Leavens et al → L&S Rock Products; 2015-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eileen Cole  Leavens et al → L&S Rock Products; 2015-04-01 to current/open; source msha-controller-operator-history