# Relationship history for MSHA mine 0500571

Current hierarchy: **Cobb Resources Corp & Boulder Gold Inc → Alma London Limited Liability Company → London 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** George  Lotspeich → London Mine; 1978-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cobb Resources Corp → London Mine; 1979-10-01 to 1987-07-25; source msha-controller-operator-history
- **controller_controls_operator:** George  Lotspeich → Cobb Resources Corp; 1979-10-01 to 1987-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Alma London Limited Liability Company → London Mine; 1987-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cobb Resources Corp & Boulder Gold Inc → London Mine; 1987-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cobb Resources Corp & Boulder Gold Inc → Alma London Limited Liability Company; 1987-07-26 to current/open; source msha-controller-operator-history