# Relationship history for MSHA mine 3605272

Current hierarchy: **Vipond Stitler A → Holliday Constructors Inc → Bruner Mine 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:** Holliday Constructors Inc → Bruner Mine 1; 1974-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vipond Stitler A → Bruner Mine 1; 1974-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vipond Stitler A → Holliday Constructors Inc; 1974-10-18 to current/open; source msha-controller-operator-history