# Relationship history for MSHA mine 2302542

Current hierarchy: **James A  Kemp; Melinda S  Kemp → Benton County Stone Company Inc. → Mill Creek**

- 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:** Melinda S  Kemp et al → Mill Creek; 1992-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Benton County Stone Company Inc. → Mill Creek; 2020-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Melinda S  Kemp et al → Benton County Stone Company Inc.; 2020-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A  Kemp et al → Benton County Stone Company Inc.; 2020-05-29 to current/open; source msha-controller-operator-history