# Relationship history for MSHA mine 4103220

Current hierarchy: **Jesse  Byrd Sr → Jesse Byrd Crushers Inc → Jesse Byrd Columbus**

- 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:** Dominy Sand & Gravel Inc → Jesse Byrd Columbus; 1984-03-01 to 1984-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Dominy Dan → Jesse Byrd Columbus; 1984-03-01 to 1984-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Dominy Dan → Dominy Sand & Gravel Inc; 1984-03-01 to 1984-05-29; source msha-controller-operator-history
- **operator_operates_mine:** Jesse Byrd Crushers Inc → Jesse Byrd Columbus; 1984-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jesse  Byrd Sr et al → Jesse Byrd Columbus; 1984-05-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jesse  Byrd Sr et al → Jesse Byrd Crushers Inc; 1984-05-30 to current/open; source msha-controller-operator-history