# Relationship history for MSHA mine 1516005

Current hierarchy: **Anderson Leah → Leah Anderson → #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

- **operator_operates_mine:** Childers Auger Service → #1; 1987-05-01 to 1987-05-10; source msha-controller-operator-history
- **controller_controls_mine:** Childers Edgar & Paul Et Al → #1; 1987-05-01 to 1987-05-10; source msha-controller-operator-history
- **controller_controls_operator:** Childers Edgar & Paul Et Al → Childers Auger Service; 1987-05-01 to 1987-05-10; source msha-controller-operator-history
- **operator_operates_mine:** Leah Anderson → #1; 1987-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anderson Leah → #1; 1987-05-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anderson Leah → Leah Anderson; 1987-05-11 to current/open; source msha-controller-operator-history