# Relationship history for MSHA mine 3600118

Current hierarchy: **David E  Iddings → Iddings Quarry → Iddings 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:** John L Iddings → Iddings Quarry; 1950-01-01 to 1979-05-05; source msha-controller-operator-history
- **controller_controls_mine:** John L  Iddings → Iddings Quarry; 1950-01-01 to 1979-05-05; source msha-controller-operator-history
- **controller_controls_operator:** John L  Iddings → John L Iddings; 1950-01-01 to 1979-05-05; source msha-controller-operator-history
- **operator_operates_mine:** Iddings Quarry → Iddings Quarry; 1979-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David E  Iddings → Iddings Quarry; 1979-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David E  Iddings → Iddings Quarry; 1979-05-06 to current/open; source msha-controller-operator-history