# Relationship history for MSHA mine 2101254

Current hierarchy: **Craig James  Johanneck → Johanneck Concrete → Hetle 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:** Johanneck Rockway → Hetle Pit; 1950-01-01 to 2012-04-22; source msha-controller-operator-history
- **controller_controls_mine:** David N  Johanneck → Hetle Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David N  Johanneck → Johanneck Rockway; 1950-01-01 to 2012-04-22; source msha-controller-operator-history
- **operator_operates_mine:** Johanneck Concrete → Hetle Pit; 2012-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Craig James  Johanneck → Hetle Pit; 2012-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig James  Johanneck → Johanneck Concrete; 2012-04-23 to current/open; source msha-controller-operator-history