# Relationship history for MSHA mine 3002769

Current hierarchy: **Robert A  Nannini → CALLAHAN & NANNINI SHALE INC → CALLAHAN & NANNINI SHALE 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:** Callahan & Nannini Shale Inc → CALLAHAN & NANNINI SHALE INC; 1986-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Andy  Callahan → CALLAHAN & NANNINI SHALE INC; 1986-11-01 to 2012-10-01; source msha-controller-operator-history
- **controller_controls_operator:** Andy  Callahan → Callahan & Nannini Shale Inc; 1986-11-01 to 2012-10-01; source msha-controller-operator-history
- **controller_controls_mine:** Robert A  Nannini → CALLAHAN & NANNINI SHALE INC; 2012-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert A  Nannini → Callahan & Nannini Shale Inc; 2012-10-02 to current/open; source msha-controller-operator-history