# Relationship history for MSHA mine 2301743

Current hierarchy: **Leo  Journagan → Leo Journagan Construction Company Inc → Journagan Portable #8 Mo**

- 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:** Hubert  Welton → Journagan Portable #8 Mo; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tom  Ottendorf → Journagan Portable #8 Mo; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leo  Journagan → Journagan Portable #8 Mo; 1978-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clever Stone Quarry Inc → Journagan Portable #8 Mo; 1979-01-01 to 1979-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Tom  Ottendorf → Clever Stone Quarry Inc; 1979-01-01 to 1979-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Welton Gravel & Limestone Inc → Journagan Portable #8 Mo; 1979-07-10 to 1991-01-17; source msha-controller-operator-history
- **controller_controls_operator:** Hubert  Welton → Welton Gravel & Limestone Inc; 1979-07-10 to 1991-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Leo Journagan Construction Company Inc → Journagan Portable #8 Mo; 1991-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leo  Journagan → Leo Journagan Construction Company Inc; 1991-01-18 to current/open; source msha-controller-operator-history