# Relationship history for MSHA mine 0404683

Current hierarchy: **Handley Margie → Hot Rocks Inc → Hells 1/2 Acre**

- 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:** Hot Rocks Inc → Hells 1/2 Acre; 1984-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Handley Margie → Hells 1/2 Acre; 1984-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Handley Margie → Hot Rocks Inc; 1984-01-01 to current/open; source msha-controller-operator-history