# Relationship history for MSHA mine 0400564

Current hierarchy: **Allied-Signal Inc → North American Refractories Company Inc → Ione Area Mines**

- 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:** Allied-Signal Inc → Ione Area Mines; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Interpace Corp → Ione Area Mines; 1950-01-01 to 1980-01-21; source msha-controller-operator-history
- **controller_controls_mine:** Jon  Rhine → Ione Area Mines; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jon  Rhine → Interpace Corp; 1950-01-01 to 1980-01-21; source msha-controller-operator-history
- **controller_controls_mine:** Minnesota Mining & Manufacturing Company → Ione Area Mines; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Minnesota Mining & Manufacturing Company → Ione Area Mines; 1980-01-22 to 1981-12-06; source msha-controller-operator-history
- **controller_controls_operator:** Minnesota Mining & Manufacturing Company → Minnesota Mining & Manufacturing Company; 1980-01-22 to 1981-12-06; source msha-controller-operator-history
- **operator_operates_mine:** North American Refractories Company Inc → Ione Area Mines; 1981-12-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Allied-Signal Inc → North American Refractories Company Inc; 1981-12-07 to current/open; source msha-controller-operator-history