# Relationship history for MSHA mine 1513045

Current hierarchy: **Dezarn Denzil & Dale → Dezarn Coal Company → No 2**

- 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:** Dezarn Denzil & Dale → No 2; 1980-06-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B H B Inc → No 2; 1981-08-01 to 1982-07-28; source msha-controller-operator-history
- **controller_controls_mine:** Baker Frank D-Doug Hopkin Et Al → No 2; 1981-08-01 to 1982-07-28; source msha-controller-operator-history
- **controller_controls_operator:** Baker Frank D-Doug Hopkin Et Al → B H B Inc; 1981-08-01 to 1982-07-28; source msha-controller-operator-history
- **operator_operates_mine:** Dezarn Coal Company → No 2; 1982-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dezarn Denzil & Dale → Dezarn Coal Company; 1982-07-29 to current/open; source msha-controller-operator-history