# Relationship history for MSHA mine 3901035

Current hierarchy: **Robert  Dittmer → Abc Trucking Inc → STATE SHALE PIT #2**

- 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:** Brandt Trucking → STATE SHALE PIT #2; 1950-01-01 to 1985-10-31; source msha-controller-operator-history
- **controller_controls_mine:** William  Brandt → STATE SHALE PIT #2; 1950-01-01 to 1985-10-31; source msha-controller-operator-history
- **controller_controls_operator:** William  Brandt → Brandt Trucking; 1950-01-01 to 1985-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Abc Trucking Inc → STATE SHALE PIT #2; 1985-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Dittmer → STATE SHALE PIT #2; 1985-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Dittmer → Abc Trucking Inc; 1985-11-01 to current/open; source msha-controller-operator-history