# Relationship history for MSHA mine 4105476

Current hierarchy: **William Clay  Coleman → South Texas Aggregates Inc. → 341 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

- **controller_controls_mine:** William Clay  Coleman → 341 Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Medina Aggregates, LLC → 341 Quarry; 2019-11-08 to 2023-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Relmco et al → 341 Quarry; 2019-11-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Relmco et al → Medina Aggregates, LLC; 2019-11-08 to 2023-12-27; source msha-controller-operator-history
- **controller_controls_operator:** S & J Aggregates LLC et al → Medina Aggregates, LLC; 2019-11-08 to 2023-12-27; source msha-controller-operator-history
- **operator_operates_mine:** South Texas Aggregates Inc. → 341 Quarry; 2023-12-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William Clay  Coleman → South Texas Aggregates Inc.; 2023-12-28 to current/open; source msha-controller-operator-history