# Relationship history for MSHA mine 0901028

Current hierarchy: **James E  Hallam; Daniel  Boggs → Boundary Creek Mining → Lower Gordon**

- 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:** James E  Hallam  et al → Lower Gordon; 1986-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Boundary Creek Mining → Lower Gordon; 1988-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James E  Hallam  et al → Boundary Creek Mining; 1988-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel  Boggs  et al → Boundary Creek Mining; 1988-07-01 to current/open; source msha-controller-operator-history