# Relationship history for MSHA mine 4801050

Current hierarchy: **Moberly James → Moberly Asphalt Maintenance Inc → Riverton 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:** Turner Construction Company → Riverton Pit; 1950-01-01 to 1979-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Turner Jack W → Riverton Pit; 1950-01-01 to 1979-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Turner Jack W → Turner Construction Company; 1950-01-01 to 1979-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Moberly Asphalt Maintenance Inc → Riverton Pit; 1979-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Moberly James → Riverton Pit; 1979-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Moberly James → Moberly Asphalt Maintenance Inc; 1979-06-01 to current/open; source msha-controller-operator-history