# Relationship history for MSHA mine 3606127

Current hierarchy: **Michael  Sgarlat → North American Mining Inc → Wanamie #18**

- 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:** Louis J  Beltrami → Wanamie #18; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tomaine Carl → Wanamie #18; 1970-01-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Beltrami Enterprises Inc → Wanamie #18; 1976-06-21 to 1976-09-09; source msha-controller-operator-history
- **controller_controls_operator:** Louis J  Beltrami → Beltrami Enterprises Inc; 1976-06-21 to 1976-09-09; source msha-controller-operator-history
- **operator_operates_mine:** Carrier Coal Company Inc → Wanamie #18; 1976-09-10 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Tomaine Carl → Carrier Coal Company Inc; 1976-09-10 to 1979-10-31; source msha-controller-operator-history
- **operator_operates_mine:** North American Mining Inc → Wanamie #18; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Sgarlat → Wanamie #18; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Sgarlat → North American Mining Inc; 1979-11-01 to current/open; source msha-controller-operator-history