# Relationship history for MSHA mine 3606427

Current hierarchy: **Fernandez Dominick & Victor Nestico → Long Time Coal Company → No 2 Vein Lykens Sd 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Smith Darvin C--Allen R Kramer Et Al → No 2 Vein Lykens Sd Slope; 1974-04-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** K & S Coal Company → No 2 Vein Lykens Sd Slope; 1977-05-01 to 1977-09-01; source msha-controller-operator-history
- **controller_controls_operator:** Smith Darvin C--Allen R Kramer Et Al → K & S Coal Company; 1977-05-01 to 1977-09-01; source msha-controller-operator-history
- **operator_operates_mine:** Long Time Coal Company → No 2 Vein Lykens Sd Slope; 1977-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fernandez Dominick & Victor Nestico → No 2 Vein Lykens Sd Slope; 1977-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fernandez Dominick & Victor Nestico → Long Time Coal Company; 1977-09-02 to current/open; source msha-controller-operator-history