# Relationship history for MSHA mine 0900965

Current hierarchy: **Stephen L  Adams; Wayne  Adams → Adams Granite Quarry → Adams 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

- **controller_controls_mine:** Stephen L  Adams  et al → Adams Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Adams Granite Quarry → Adams Quarry; 1985-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen L  Adams  et al → Adams Granite Quarry; 1985-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Adams  et al → Adams Granite Quarry; 1985-01-01 to current/open; source msha-controller-operator-history