# Relationship history for MSHA mine 2500773

Current hierarchy: **Bernard  Batenhorst → Batenhorst Gravel Company → ST. PAUL 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

- **controller_controls_mine:** Bernard  Batenhorst → ST. PAUL PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Christensen Sand & Gravel → ST. PAUL PIT; 1950-01-01 to 1995-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Christensen Harlan → ST. PAUL PIT; 1950-01-01 to 1995-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Christensen Harlan → Christensen Sand & Gravel; 1950-01-01 to 1995-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Batenhorst Gravel Company → ST. PAUL PIT; 1995-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bernard  Batenhorst → Batenhorst Gravel Company; 1995-07-26 to current/open; source msha-controller-operator-history