# Relationship history for MSHA mine 3401637

Current hierarchy: **Pommier Kay L → Industrial Management Services Inc → Eagle Mine**

- 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:** International Chemical Company Inc → Eagle Mine; 1986-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Inter-Chem Coal Company Inc → Eagle Mine; 1988-02-01 to 1993-02-22; source msha-controller-operator-history
- **controller_controls_operator:** International Chemical Company Inc → Inter-Chem Coal Company Inc; 1988-02-01 to 1993-02-22; source msha-controller-operator-history
- **controller_controls_mine:** Pommier Kay L → Eagle Mine; 1990-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Industrial Management Services Inc → Eagle Mine; 1993-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pommier Kay L → Industrial Management Services Inc; 1993-02-23 to current/open; source msha-controller-operator-history