# Relationship history for MSHA mine 4104160

Current hierarchy: **Constar Inc → Gulf Coast Stabilized Materials → GCSM  #13**

- 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:** Constar Inc  et al → GCSM  #13; 1994-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gulf Coast Stabilized Materials → GCSM  #13; 2000-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Constar Inc  et al → Gulf Coast Stabilized Materials; 2000-01-01 to current/open; source msha-controller-operator-history