# Relationship history for MSHA mine 0504434

Current hierarchy: **Darryl L  Steele; Bret L  Steele → Maybell Enterprises Inc → Maybell Enterprises Inc**

- 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:** Maybell Enterprises Inc → Maybell Enterprises Inc; 1990-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darryl L  Steele et al → Maybell Enterprises Inc; 1990-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darryl L  Steele et al → Maybell Enterprises Inc; 1990-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bret L  Steele et al → Maybell Enterprises Inc; 1990-07-01 to current/open; source msha-controller-operator-history