# Relationship history for MSHA mine 2003016

Current hierarchy: **Kenneth M Burns → M W Burns Excavating & Gravel → BURNS #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:** M W Burns Excavating & Gravel → BURNS #1; 1997-06-01 to 2019-09-03; source msha-controller-operator-history
- **controller_controls_mine:** Michael W  Burns → BURNS #1; 1997-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael W  Burns → M W Burns Excavating & Gravel; 1997-06-01 to 2019-09-03; source msha-controller-operator-history
- **operator_operates_mine:** M W Burns Excavating & Gravel → BURNS #1; 2019-09-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth M Burns → BURNS #1; 2019-09-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth M Burns → M W Burns Excavating & Gravel; 2019-09-04 to current/open; source msha-controller-operator-history