# Relationship history for MSHA mine 4105182

Current hierarchy: **Ronnie  Jones; Terry  Bryant → Jones Bros Mfg, Inc → Portable Pug Mill #2**

- 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:** Terry  Bryant et al → Portable Pug Mill #2; 1979-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jones Bros Mfg, Inc → Portable Pug Mill #2; 2016-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Terry  Bryant et al → Jones Bros Mfg, Inc; 2016-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronnie  Jones et al → Jones Bros Mfg, Inc; 2016-03-18 to current/open; source msha-controller-operator-history