# Relationship history for MSHA mine 2402055

Current hierarchy: **Lonnie  Anderson → United Materials Of Great Falls Inc → Screen Plant #2**

- 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:** Robert B  McIntyre → Screen Plant #2; 1988-01-01 to 2022-01-18; source msha-controller-operator-history
- **operator_operates_mine:** United Materials Of Great Falls Inc → Screen Plant #2; 1994-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert B  McIntyre → United Materials Of Great Falls Inc; 1994-07-01 to 2022-01-18; source msha-controller-operator-history
- **controller_controls_mine:** Lonnie  Anderson → Screen Plant #2; 2022-01-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lonnie  Anderson → United Materials Of Great Falls Inc; 2022-01-19 to current/open; source msha-controller-operator-history