# Relationship history for MSHA mine 4606454

Current hierarchy: **SMC Holding Corp → Mountain Laurel Resources Company → Siltix I**

- 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:** Mc Daniel Vernon → Siltix I; 1978-12-01 to 1986-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Mc Daniel Mining Company Inc → Siltix I; 1981-12-01 to 1986-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Mc Daniel Vernon → Mc Daniel Mining Company Inc; 1981-12-01 to 1986-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Laurel Resources Company → Siltix I; 1987-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** SMC Holding Corp → Siltix I; 1987-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** SMC Holding Corp → Mountain Laurel Resources Company; 1987-01-01 to current/open; source msha-controller-operator-history