# Relationship history for MSHA mine 1302309

Current hierarchy: **Western Engineering Company Incorporated → Western Engineering Co.Inc. → Oakland Pit**

- 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:** Western Engineering Co.Inc. → Oakland Pit; 2005-11-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Lemons et al → Oakland Pit; 2005-11-07 to 2023-12-30; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Lemons et al → Western Engineering Co.Inc.; 2005-11-07 to 2023-12-30; source msha-controller-operator-history
- **controller_controls_mine:** Western Engineering Company Incorporated → Oakland Pit; 2023-12-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Western Engineering Company Incorporated → Western Engineering Co.Inc.; 2023-12-31 to current/open; source msha-controller-operator-history