# Relationship history for MSHA mine 4104239

Current hierarchy: **Johnny  Speake → J & S Sand & Gravel → J & S SAND PIT**

- 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:** J & S Sand & Gravel → J & S SAND PIT; 2000-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Johnny  Speake → J & S SAND PIT; 2000-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnny  Speake → J & S Sand & Gravel; 2000-11-01 to current/open; source msha-controller-operator-history