# Relationship history for MSHA mine 4202273

Current hierarchy: **Larry K  Farnsworth; Justin  Farley → United Stone & Design → GATE CANYON 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:** United Stone & Design → GATE CANYON QUARRY; 2000-02-01 to 2000-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Ave  Jiron → GATE CANYON QUARRY; 2000-02-01 to 2000-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Ave  Jiron → United Stone & Design; 2000-02-01 to 2000-05-31; source msha-controller-operator-history
- **operator_operates_mine:** United Stone & Design → GATE CANYON QUARRY; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Justin  Farley et al → GATE CANYON QUARRY; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justin  Farley et al → United Stone & Design; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry K  Farnsworth et al → United Stone & Design; 2000-06-01 to current/open; source msha-controller-operator-history