# Relationship history for MSHA mine 1002315

Current hierarchy: **Yvette  Davis; Josh P Davis; Phil  Davis → Granite Excavation, Inc. → Nissula 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

- **controller_controls_mine:** Phil  Davis et al → Nissula Pit; 2019-08-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Granite Excavation Inc → Nissula Pit; 2019-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Phil  Davis et al → Granite Excavation Inc; 2019-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Josh P Davis et al → Granite Excavation Inc; 2019-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Yvette  Davis et al → Granite Excavation Inc; 2019-09-24 to current/open; source msha-controller-operator-history