# Relationship history for MSHA mine 4801874

Current hierarchy: **Melanie Renae  Stockert; Kavin Lee  Stockert → Highland Excavation & Construction, Inc. → Highland Excavation Pit**

- 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:** Highland Excavation & Construction, Inc. → Highland Excavation Pit; 2024-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Melanie Renae  Stockert → Highland Excavation Pit; 2024-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Melanie Renae  Stockert → Highland Excavation & Construction, Inc.; 2024-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kavin Lee  Stockert → Highland Excavation & Construction, Inc.; 2024-01-17 to current/open; source msha-controller-operator-history