# Relationship history for MSHA mine 4703828

Current hierarchy: **Kristopher P  Bjoin; Shaun M  Bjoin; Jonathan M  Bjoin → Bjoin Limestone Inc. → Bjoin Limestone Inc.**

- 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:** Kathleen M  Bjoin et al → Bjoin Limestone Inc.; 1950-01-01 to 2014-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Jonathan M  Bjoin → Bjoin Limestone Inc.; 2014-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bjoin Limestone Inc. → Bjoin Limestone Inc.; 2018-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jonathan M  Bjoin → Bjoin Limestone Inc.; 2018-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kristopher P  Bjoin → Bjoin Limestone Inc.; 2018-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shaun M  Bjoin → Bjoin Limestone Inc.; 2018-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kathleen M  Bjoin et al → Bjoin Limestone Inc.; 2018-05-08 to 2014-04-30; source msha-controller-operator-history