# Relationship history for MSHA mine 0405151

Current hierarchy: **Sicheneder James L → Del Pac Llc-(Arizona) → Del Pac Sybil 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:** Anaconda Mining → Del Pac Sybil Mine; 1991-05-01 to 1994-08-21; source msha-controller-operator-history
- **controller_controls_mine:** Smith Clyde & Lloyd → Del Pac Sybil Mine; 1991-05-01 to 1994-08-21; source msha-controller-operator-history
- **controller_controls_operator:** Smith Clyde & Lloyd → Anaconda Mining; 1991-05-01 to 1994-08-21; source msha-controller-operator-history
- **operator_operates_mine:** Del Pac Llc-(Arizona) → Del Pac Sybil Mine; 1994-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sicheneder James L → Del Pac Sybil Mine; 1994-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sicheneder James L → Del Pac Llc-(Arizona); 1994-08-22 to current/open; source msha-controller-operator-history