# Relationship history for MSHA mine 4104304

Current hierarchy: **John  Heilman → Circle Y Construction → CIRCLE Y CONSTRUCTION**

- 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:** Circle Y Construction → CIRCLE Y CONSTRUCTION; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John  Heilman → CIRCLE Y CONSTRUCTION; 2001-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Heilman → Circle Y Construction; 2001-07-01 to current/open; source msha-controller-operator-history