# Relationship history for MSHA mine 1202191

Current hierarchy: **Charles D  Halsema → Halsema Gravel Company Inc → HALSEMA GRAVEL CO. 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** J & R Bulk Transport → HALSEMA GRAVEL CO. INC.; 1996-05-01 to 1996-12-31; source msha-controller-operator-history
- **controller_controls_mine:** James A  Haynes → HALSEMA GRAVEL CO. INC.; 1996-05-01 to 1996-12-31; source msha-controller-operator-history
- **controller_controls_operator:** James A  Haynes → J & R Bulk Transport; 1996-05-01 to 1996-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Halsema Gravel Company Inc → HALSEMA GRAVEL CO. INC.; 1997-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles D  Halsema → HALSEMA GRAVEL CO. INC.; 1997-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles D  Halsema → Halsema Gravel Company Inc; 1997-01-01 to current/open; source msha-controller-operator-history