# Relationship history for MSHA mine 2402004

Current hierarchy: **City Of Missoula-MT → City of Missoula Street Division → Screen #199**

- 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:** State Of Montana → Screen #199; 1992-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Montana Department Of Transportation → Screen #199; 1993-05-01 to 2002-04-16; source msha-controller-operator-history
- **controller_controls_operator:** State Of Montana → Montana Department Of Transportation; 1993-05-01 to 2002-04-16; source msha-controller-operator-history
- **operator_operates_mine:** City of Missoula Street Division → Screen #199; 2002-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** City Of Missoula-MT → Screen #199; 2002-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** City Of Missoula-MT → City of Missoula Street Division; 2002-04-17 to current/open; source msha-controller-operator-history