# Relationship history for MSHA mine 2800494

Current hierarchy: **Hertzberg Paula → Condor At Longview → Condor At Longview**

- 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:** Conklin Farm → Condor At Longview; 1950-01-01 to 1986-12-21; source msha-controller-operator-history
- **controller_controls_mine:** Conklin Nathan J & Frank → Condor At Longview; 1950-01-01 to 1986-12-21; source msha-controller-operator-history
- **controller_controls_operator:** Conklin Nathan J & Frank → Conklin Farm; 1950-01-01 to 1986-12-21; source msha-controller-operator-history
- **operator_operates_mine:** Condor At Longview → Condor At Longview; 1986-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hertzberg Paula → Condor At Longview; 1986-12-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hertzberg Paula → Condor At Longview; 1986-12-22 to current/open; source msha-controller-operator-history