# Relationship history for MSHA mine 3201021

Current hierarchy: **Kelly  Pomeroy → Kelly Pomeroy Trucking, L.L.C. → Portable Plant 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:** Kelly Pomeroy Trucking, L.L.C. → Portable Plant 1; 2013-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kelly  Pomeroy → Portable Plant 1; 2013-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kelly  Pomeroy → Kelly Pomeroy Trucking, L.L.C.; 2013-10-18 to current/open; source msha-controller-operator-history