# Relationship history for MSHA mine 0102429

Current hierarchy: **Dobbins Sammy → Chisenall Enterprises → Norwood Mine**

- 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:** Chisenall Enterprises → Norwood Mine; 1982-01-01 to 1982-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Chisenall Jimmy → Norwood Mine; 1982-01-01 to 1982-10-18; source msha-controller-operator-history
- **controller_controls_operator:** Chisenall Jimmy → Chisenall Enterprises; 1982-01-01 to 1982-10-18; source msha-controller-operator-history
- **operator_operates_mine:** Chisenall Enterprises → Norwood Mine; 1982-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dobbins Sammy → Norwood Mine; 1982-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dobbins Sammy → Chisenall Enterprises; 1982-10-19 to current/open; source msha-controller-operator-history