# Relationship history for MSHA mine 3603168

Current hierarchy: **Bernard C (aka Jr.)  Banks → American Asphalt Paving Company → EAST FALLS 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** American Asphalt Paving Company → EAST FALLS PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bernard C  Banks  et al → EAST FALLS PIT; 1950-01-01 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Bernard C  Banks  et al → American Asphalt Paving Company; 1950-01-01 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_operator:** John F  Banks  et al → American Asphalt Paving Company; 1950-01-01 to 2017-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Bernard C (aka Jr.)  Banks → EAST FALLS PIT; 2018-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bernard C (aka Jr.)  Banks → American Asphalt Paving Company; 2018-01-01 to current/open; source msha-controller-operator-history