# Relationship history for MSHA mine 4406253

Current hierarchy: **Steffey Ronnie & Jonathan E Musick → Mountain Top Enterprises Inc → #1 Loading Dock**

- 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:** Mountain Top Enterprises Inc → #1 Loading Dock; 1985-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steffey Ronnie & Jonathan E Musick → #1 Loading Dock; 1985-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steffey Ronnie & Jonathan E Musick → Mountain Top Enterprises Inc; 1985-09-01 to current/open; source msha-controller-operator-history