# Relationship history for MSHA mine 0102629

Current hierarchy: **Hobson Jimmy → Signa Mining Inc → Weller 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Thursby Mining Corp → Weller Mine; 1985-06-01 to 1988-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Thursby James N Sr → Weller Mine; 1985-06-01 to 1988-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Thursby James N Sr → Thursby Mining Corp; 1985-06-01 to 1988-03-01; source msha-controller-operator-history
- **operator_operates_mine:** Signa Mining Inc → Weller Mine; 1988-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hobson Jimmy → Weller Mine; 1988-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hobson Jimmy → Signa Mining Inc; 1988-03-02 to current/open; source msha-controller-operator-history