# Relationship history for MSHA mine 4800816

Current hierarchy: **Charles  Gallagher → Applied Industrial Materials Corp (Aimcor) → Wimco 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

- **operator_operates_mine:** International Minerals & Chemical Corp → Wimco Mine; 1950-01-01 to 1986-10-31; source msha-controller-operator-history
- **controller_controls_mine:** IMC Global Inc → Wimco Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** IMC Global Inc → International Minerals & Chemical Corp; 1950-01-01 to 1986-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Applied Industrial Materials Corp (Aimcor) → Wimco Mine; 1986-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Gallagher et al → Wimco Mine; 1986-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Gallagher et al → Applied Industrial Materials Corp (Aimcor); 1986-11-01 to current/open; source msha-controller-operator-history