# Relationship history for MSHA mine 2003426

Current hierarchy: **Bob  Rogers; Dave  Murrell → Prolime Corporation → Saline Plant #1**

- 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:** Bob  Rogers et al → Saline Plant #1; 1999-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Prolime Corporation → Saline Plant #1; 2009-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bob  Rogers et al → Prolime Corporation; 2009-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dave  Murrell et al → Prolime Corporation; 2009-03-18 to current/open; source msha-controller-operator-history