# Relationship history for MSHA mine 4103347

Current hierarchy: **Eleazar  Cantu → C & P SAND & GRAVEL, INC. → C & P SAND & GRAVEL, INC.**

- 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

- **operator_operates_mine:** Nueces Materials Inc → C & P SAND & GRAVEL, INC.; 1985-11-01 to 1990-05-31; source msha-controller-operator-history
- **controller_controls_mine:** B Curtis  Smith → C & P SAND & GRAVEL, INC.; 1985-11-01 to 1990-05-31; source msha-controller-operator-history
- **controller_controls_operator:** B Curtis  Smith → Nueces Materials Inc; 1985-11-01 to 1990-05-31; source msha-controller-operator-history
- **operator_operates_mine:** H & H Sand & Gravel Inc → C & P SAND & GRAVEL, INC.; 1990-06-01 to 2004-06-13; source msha-controller-operator-history
- **controller_controls_mine:** Anna J  Hand → C & P SAND & GRAVEL, INC.; 1990-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anna J  Hand → H & H Sand & Gravel Inc; 1990-06-01 to 2004-06-13; source msha-controller-operator-history
- **operator_operates_mine:** C & P SAND & GRAVEL, INC. → C & P SAND & GRAVEL, INC.; 2004-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eleazar  Cantu  et al → C & P SAND & GRAVEL, INC.; 2004-06-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eleazar  Cantu  et al → C & P SAND & GRAVEL, INC.; 2004-06-14 to current/open; source msha-controller-operator-history