# Relationship history for MSHA mine 0801311

Current hierarchy: **Matthew T  Rhoads → Gulf Coast Sand, Inc. → Gulf Coast Sand, 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Carson Sweeney Sand → Gulf Coast Sand, Inc.; 2002-03-20 to 2004-11-02; source msha-controller-operator-history
- **controller_controls_mine:** Carson  Sweeney → Gulf Coast Sand, Inc.; 2002-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carson  Sweeney → Carson Sweeney Sand; 2002-03-20 to 2004-11-02; source msha-controller-operator-history
- **operator_operates_mine:** Gulf Coast Sand, Inc. → Gulf Coast Sand, Inc.; 2004-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matthew T  Rhoads → Gulf Coast Sand, Inc.; 2004-11-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew T  Rhoads → Gulf Coast Sand, Inc.; 2004-11-03 to current/open; source msha-controller-operator-history