# Relationship history for MSHA mine 4703846

Current hierarchy: **Monte S  Krueger; Travis C  Krueger → Krueger & Stienfest, Inc. → Extec Plant 3**

- 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:** Monte S  Krueger et al → Extec Plant 3; 1992-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** KRUEGER & STIENFEST, INC. → Extec Plant 3; 2019-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Monte S  Krueger et al → KRUEGER & STIENFEST, INC.; 2019-05-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis C  Krueger et al → KRUEGER & STIENFEST, INC.; 2019-05-07 to current/open; source msha-controller-operator-history