# Relationship history for MSHA mine 4003549

Current hierarchy: **Todd  Davenport → Elk River Stone LLC → Pit 2 B**

- 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:** Elk River Stone LLC → Pit 2 B; 2021-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Todd  Davenport → Pit 2 B; 2021-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd  Davenport → Elk River Stone LLC; 2021-02-25 to current/open; source msha-controller-operator-history