# Relationship history for MSHA mine 4105739

Current hierarchy: **Oscar  Cuellar; Nancy  Cuellar Davenport → TERRA FIRMA MATERIALS, L.L.C. → VELA 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Nancy  Cuellar Davenport et al → VELA PIT; 2008-01-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** TERRA FIRMA MATERIALS, L.L.C. → VELA PIT; 2024-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nancy  Cuellar Davenport et al → TERRA FIRMA MATERIALS, L.L.C.; 2024-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Oscar  Cuellar et al → TERRA FIRMA MATERIALS, L.L.C.; 2024-03-27 to current/open; source msha-controller-operator-history