# Relationship history for MSHA mine 2500008

Current hierarchy: **Nebco Inc → Beatrice Concrete Company → Seitz Quarry**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Haith Lime & Rock Company → Seitz Quarry; 1950-01-01 to 1983-02-28; source msha-controller-operator-history
- **controller_controls_mine:** W M  Haith  et al → Seitz Quarry; 1950-01-01 to 1983-02-28; source msha-controller-operator-history
- **controller_controls_operator:** W M  Haith  et al → Haith Lime & Rock Company; 1950-01-01 to 1983-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Seitz Quarry → Seitz Quarry; 1983-03-01 to 1997-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Alma R  Seitz → Seitz Quarry; 1983-03-01 to 1997-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Alma R  Seitz → Seitz Quarry; 1983-03-01 to 1997-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Jamie D  Renshaw → Seitz Quarry; 1987-04-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Beatrice Concrete Company Inc → Seitz Quarry; 1997-09-01 to 2015-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Jamie D  Renshaw → Beatrice Concrete Company Inc; 1997-09-01 to 2015-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Beatrice Concrete Company → Seitz Quarry; 2015-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nebco Inc → Seitz Quarry; 2015-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nebco Inc → Beatrice Concrete Company; 2015-08-01 to current/open; source msha-controller-operator-history