# Relationship history for MSHA mine 3303699

Current hierarchy: **Carson Jay C → Wells Mining Company → Carson Strip**

- 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:** Carson Jay C → Carson Strip; 1974-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wells Mining Company → Carson Strip; 1978-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carson Jay C → Wells Mining Company; 1978-08-01 to current/open; source msha-controller-operator-history