# Relationship history for MSHA mine 2601841

Current hierarchy: **Ala John F & Albert K Supp → Eager Beaver Mine Corp → Eager Beaver 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

- **controller_controls_mine:** Ala John F & Albert K Supp Et Al → Eager Beaver Mine; 1978-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eager Beaver Mine Corp → Eager Beaver Mine; 1983-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ala John F & Albert K Supp Et Al → Eager Beaver Mine Corp; 1983-05-01 to current/open; source msha-controller-operator-history