# Relationship history for MSHA mine 0404711

Current hierarchy: **Davis Dewayne → Dewayne Davis → Alta 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:** Alta Placer Limited Partner → Alta Mine; 1984-06-01 to 1989-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Boyle Eugene H Jr Et Al → Alta Mine; 1984-06-01 to 1989-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Boyle Eugene H Jr Et Al → Alta Placer Limited Partner; 1984-06-01 to 1989-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Dewayne Davis → Alta Mine; 1989-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Davis Dewayne → Alta Mine; 1989-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Davis Dewayne → Dewayne Davis; 1989-04-01 to current/open; source msha-controller-operator-history