# Relationship history for MSHA mine 2601691

Current hierarchy: **London Lenny → White Mineral Resources Inc → Bullfrog**

- 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:** E R Fegert Inc → Bullfrog; 1980-11-01 to 1981-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Fegert Earl R → Bullfrog; 1980-11-01 to 1981-11-29; source msha-controller-operator-history
- **controller_controls_operator:** Fegert Earl R → E R Fegert Inc; 1980-11-01 to 1981-11-29; source msha-controller-operator-history
- **operator_operates_mine:** White Mineral Resources Inc → Bullfrog; 1981-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** London Lenny → Bullfrog; 1981-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** London Lenny → White Mineral Resources Inc; 1981-11-30 to current/open; source msha-controller-operator-history