# Relationship history for MSHA mine 4104721

Current hierarchy: **Dale W  Gipson; William C  Gipson → Gipson Construction → Eagle Portable #1**

- 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:** Gipson Construction → Eagle Portable #1; 2008-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dale W  Gipson et al → Eagle Portable #1; 2008-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale W  Gipson et al → Gipson Construction; 2008-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William C  Gipson et al → Gipson Construction; 2008-01-29 to current/open; source msha-controller-operator-history