# Relationship history for MSHA mine 1103005

Current hierarchy: **Lawrence  Bromberek → Bromberek's Flagstone Co. → Bromberek's Flagstone Co.**

- 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:** Bromberek's Flagstone Co. → Bromberek's Flagstone Co.; 1997-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronald  Bromberek  et al → Bromberek's Flagstone Co.; 1997-05-01 to 2020-05-17; source msha-controller-operator-history
- **controller_controls_operator:** Ronald  Bromberek  et al → Bromberek's Flagstone Co.; 1997-05-01 to 2020-05-17; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence  Bromberek  et al → Bromberek's Flagstone Co.; 1997-05-01 to 2020-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence  Bromberek → Bromberek's Flagstone Co.; 2020-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence  Bromberek → Bromberek's Flagstone Co.; 2020-05-18 to current/open; source msha-controller-operator-history