# Relationship history for MSHA mine 3607354

Current hierarchy: **Shingara Stephen & Daniel--Ralph Koch → Big Pine Coal Company → No 3 Slope**

- 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:** Shingara Stephen & Daniel--Ralph Koch → No 3 Slope; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Pine Coal Company → No 3 Slope; 1982-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shingara Stephen & Daniel--Ralph Koch → Big Pine Coal Company; 1982-08-01 to current/open; source msha-controller-operator-history