# Relationship history for MSHA mine 3607054

Current hierarchy: **Lechene Leo L → E & L Contractors Inc → Zeglin Job**

- 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:** E & L Contractors Inc → Zeglin Job; 1980-11-01 to 1981-03-04; source msha-controller-operator-history
- **controller_controls_mine:** Long Elton E → Zeglin Job; 1980-11-01 to 1981-03-04; source msha-controller-operator-history
- **controller_controls_operator:** Long Elton E → E & L Contractors Inc; 1980-11-01 to 1981-03-04; source msha-controller-operator-history
- **operator_operates_mine:** E & L Contractors Inc → Zeglin Job; 1981-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lechene Leo L → Zeglin Job; 1981-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lechene Leo L → E & L Contractors Inc; 1981-03-05 to current/open; source msha-controller-operator-history