# Relationship history for MSHA mine 0203149

Current hierarchy: **San Carlos Apache Tribe → Gilson Wash District Economic Enterprise → Ranch Creek Sand & Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** San Carlos Apache Tribe → Ranch Creek Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** San Carlos Apache Tribe Gilson Wash Dist Economic → Ranch Creek Sand & Gravel; 2007-02-05 to 2007-07-05; source msha-controller-operator-history
- **controller_controls_operator:** San Carlos Apache Tribe → San Carlos Apache Tribe Gilson Wash Dist Economic; 2007-02-05 to 2007-07-05; source msha-controller-operator-history
- **operator_operates_mine:** Mescal Mountain Materials LLC. → Ranch Creek Sand & Gravel; 2007-07-06 to 2011-08-23; source msha-controller-operator-history
- **controller_controls_mine:** San Carlos Apache Tribe → Ranch Creek Sand & Gravel; 2007-07-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** San Carlos Apache Tribe → Mescal Mountain Materials LLC.; 2007-07-06 to 2011-08-23; source msha-controller-operator-history
- **operator_operates_mine:** Gilson Wash District Economic Enterprise → Ranch Creek Sand & Gravel; 2011-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** San Carlos Apache Tribe → Ranch Creek Sand & Gravel; 2011-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** San Carlos Apache Tribe → Gilson Wash District Economic Enterprise; 2011-08-24 to current/open; source msha-controller-operator-history