# Relationship history for MSHA mine 2602688

Current hierarchy: **Deilmann-Haniel → JS Redpath Corporation → Zanzibar Underground**

- 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

- **controller_controls_mine:** James S  Redpath → Zanzibar Underground; 1978-03-09 to 2007-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Deilmann-Haniel → Zanzibar Underground; 2007-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fronteer Development (USA) Inc. → Zanzibar Underground; 2010-10-19 to 2011-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Fronteer Gold, Inc. → Zanzibar Underground; 2010-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fronteer Gold, Inc. → Fronteer Development (USA) Inc.; 2010-10-19 to 2011-04-06; source msha-controller-operator-history
- **operator_operates_mine:** JS Redpath Corporation → Zanzibar Underground; 2011-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Deilmann-Haniel → JS Redpath Corporation; 2011-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James S  Redpath → JS Redpath Corporation; 2011-04-07 to 2007-08-31; source msha-controller-operator-history