# Relationship history for MSHA mine 2400241

Current hierarchy: **Lawrence T  Atkinson → Western Mine Services → Valley View 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** St Lawrence Consolidated Mines Inc → Valley View Mine; 1980-07-01 to 1982-01-05; source msha-controller-operator-history
- **controller_controls_mine:** Thomas James L Sr → Valley View Mine; 1980-07-01 to 1982-01-05; source msha-controller-operator-history
- **controller_controls_operator:** Thomas James L Sr → St Lawrence Consolidated Mines Inc; 1980-07-01 to 1982-01-05; source msha-controller-operator-history
- **operator_operates_mine:** Western Mine Services → Valley View Mine; 1982-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence T  Atkinson → Valley View Mine; 1982-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence T  Atkinson → Western Mine Services; 1982-01-06 to current/open; source msha-controller-operator-history