# Relationship history for MSHA mine 0102789

Current hierarchy: **Edith Hester  Kemp → Edsu Inc → EDSU 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

- **operator_operates_mine:** Edsu Inc → EDSU PIT; 1989-01-01 to 1995-01-03; source msha-controller-operator-history
- **controller_controls_mine:** Edith Hester  Kemp → EDSU PIT; 1989-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edith Hester  Kemp → Edsu Inc; 1989-01-01 to 1995-01-03; source msha-controller-operator-history
- **operator_operates_mine:** North Alabama Sand & Gravel Inc → EDSU PIT; 1995-01-04 to 1995-04-09; source msha-controller-operator-history
- **controller_controls_mine:** Waters Brothers Contractors Inc → EDSU PIT; 1995-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Waters Brothers Contractors Inc → North Alabama Sand & Gravel Inc; 1995-01-04 to 1995-04-09; source msha-controller-operator-history
- **operator_operates_mine:** Edsu Inc → EDSU PIT; 1995-04-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edith Hester  Kemp → Edsu Inc; 1995-04-10 to current/open; source msha-controller-operator-history