# Relationship history for MSHA mine 0102717

Current hierarchy: **Stimpson James T (Tommy) → Mining Excavating Construction Inc → Masseyline Mine**

- 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:** Stimpson James T (Tommy) → Masseyline Mine; 1986-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mining Excavating Construction Inc → Masseyline Mine; 1987-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stimpson James T (Tommy) → Mining Excavating Construction Inc; 1987-03-01 to current/open; source msha-controller-operator-history