# Relationship history for MSHA mine 3401039

Current hierarchy: **Walters Mannin L Jr → Gocat Inc → Donna Gay -Strip**

- 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:** Roberts Earth Moving → Donna Gay -Strip; 1977-08-01 to 1978-03-03; source msha-controller-operator-history
- **controller_controls_mine:** Roberts Donald E → Donna Gay -Strip; 1977-08-01 to 1978-03-03; source msha-controller-operator-history
- **controller_controls_operator:** Roberts Donald E → Roberts Earth Moving; 1977-08-01 to 1978-03-03; source msha-controller-operator-history
- **operator_operates_mine:** Gocat Inc → Donna Gay -Strip; 1978-03-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Walters Mannin L Jr → Donna Gay -Strip; 1978-03-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walters Mannin L Jr → Gocat Inc; 1978-03-04 to current/open; source msha-controller-operator-history