# Relationship history for MSHA mine 0404994

Current hierarchy: **Diane B  Kritz → Kritz Excavating & Trucking Inc → KRITZ/GOSS**

- 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:** Slash Bar G Sand Company → KRITZ/GOSS; 1988-12-01 to 1989-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Fred  Goss → KRITZ/GOSS; 1988-12-01 to 1989-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Fred  Goss → Slash Bar G Sand Company; 1988-12-01 to 1989-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Kritz Excavating & Trucking Inc → KRITZ/GOSS; 1989-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Diane B  Kritz → KRITZ/GOSS; 1989-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Diane B  Kritz → Kritz Excavating & Trucking Inc; 1989-06-01 to current/open; source msha-controller-operator-history