# Relationship history for MSHA mine 3605561

Current hierarchy: **Adams Donald H Sr → A & T Associates Inc → Sherrard Tract Bank**

- 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:** A & T Associates Inc → Sherrard Tract Bank; 1975-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adams Donald H Sr → Sherrard Tract Bank; 1975-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adams Donald H Sr → A & T Associates Inc; 1975-03-27 to current/open; source msha-controller-operator-history