# Relationship history for MSHA mine 3303383

Current hierarchy: **Erskine R J → Erskine Contracting Corp → Erskine Strip No 3**

- 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:** Erskine R J → Erskine Strip No 3; 1974-11-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Erskine Contracting Corp → Erskine Strip No 3; 1975-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Erskine R J → Erskine Contracting Corp; 1975-09-22 to current/open; source msha-controller-operator-history