# Relationship history for MSHA mine 4104398

Current hierarchy: **Randall D  Smith → West Texas Rock Resources, LLC → Clements Quarry**

- 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:** Nobles Road Construction, Inc. → Clements Quarry; 2003-01-05 to 2007-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Bobby R  Nobles et al → Clements Quarry; 2003-01-05 to 2025-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Bobby R  Nobles et al → Nobles Road Construction, Inc.; 2003-01-05 to 2007-02-06; source msha-controller-operator-history
- **operator_operates_mine:** West Texas Rock Resources, LLC → Clements Quarry; 2007-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randall D  Smith → Clements Quarry; 2007-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randall D  Smith → West Texas Rock Resources, LLC; 2007-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert Aaron Myers et al → Clements Quarry; 2025-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert Aaron Myers et al → Nobles Road Construction, Inc.; 2025-04-01 to 2007-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Robert Matt Nobles et al → Nobles Road Construction, Inc.; 2025-04-01 to 2007-02-06; source msha-controller-operator-history