# Relationship history for MSHA mine 3605605

Current hierarchy: **Laverick Carl → Nationwide Enterprises → Short 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:** R & R Salvage Inc → Short Strip; 1975-05-01 to 1977-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Ressler Walter → Short Strip; 1975-05-01 to 1977-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Ressler Walter → R & R Salvage Inc; 1975-05-01 to 1977-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Nationwide Enterprises → Short Strip; 1977-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Laverick Carl → Short Strip; 1977-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Laverick Carl → Nationwide Enterprises; 1977-08-01 to current/open; source msha-controller-operator-history