# Relationship history for MSHA mine 2102945

Current hierarchy: **James J  Haller → Pioneer Blacktop Inc → Pioneer Blacktop Inc**

- 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  Munsterteiger → Pioneer Blacktop Inc; 1978-10-01 to 1991-06-25; source msha-controller-operator-history
- **operator_operates_mine:** Minnesota Rock Inc → Pioneer Blacktop Inc; 1985-09-01 to 1986-10-29; source msha-controller-operator-history
- **controller_controls_operator:** Bernard  Munsterteiger → Minnesota Rock Inc; 1985-09-01 to 1986-10-29; source msha-controller-operator-history
- **operator_operates_mine:** Pioneer Blacktop Inc → Pioneer Blacktop Inc; 1986-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James J  Haller → Pioneer Blacktop Inc; 1986-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James J  Haller → Pioneer Blacktop Inc; 1986-10-30 to current/open; source msha-controller-operator-history