# Relationship history for MSHA mine 4406546

Current hierarchy: **Steven R  Mullins → Steven R Mullins Excavating Inc → #9 Strip**

- 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

- **controller_controls_mine:** Steven R  Mullins → #9 Strip; 1979-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Steven R Mullins Excavating Inc → #9 Strip; 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven R  Mullins → Steven R Mullins Excavating Inc; 1989-10-01 to current/open; source msha-controller-operator-history