# Relationship history for MSHA mine 4604318

Current hierarchy: **Minnix Dann → Clay Development Co Inc → Owings Mine**

- 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:** Clay Development Co Inc → Owings Mine; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Minnix Dann Et Al → Owings Mine; 1974-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Minnix Dann Et Al → Clay Development Co Inc; 1974-01-01 to current/open; source msha-controller-operator-history