# Relationship history for MSHA mine 2002947

Current hierarchy: **Jeffry L Pung; Helen B Pung → Pung Excavating → Pewamo 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:** Pung Excavating → Pewamo Pit; 1994-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roy N  Pung → Pewamo Pit; 1994-10-01 to 2022-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Roy N  Pung → Pung Excavating; 1994-10-01 to 2022-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Helen B Pung et al → Pewamo Pit; 2022-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Helen B Pung et al → Pung Excavating; 2022-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffry L Pung et al → Pung Excavating; 2022-02-07 to current/open; source msha-controller-operator-history