# Relationship history for MSHA mine 1513765

Current hierarchy: **Wendell  Elza → Wade Ridge Mining Inc → Damerial**

- 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:** F & H Coal Company → Damerial; 1982-08-01 to 1983-08-03; source msha-controller-operator-history
- **controller_controls_mine:** Hacker Billy Et Al → Damerial; 1982-08-01 to 1983-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Hacker Billy Et Al → F & H Coal Company; 1982-08-01 to 1983-08-03; source msha-controller-operator-history
- **controller_controls_mine:** Mays Neil → Damerial; 1982-10-01 to 1988-05-30; source msha-controller-operator-history
- **operator_operates_mine:** Wade Ridge Mining Inc → Damerial; 1983-08-04 to 1988-05-30; source msha-controller-operator-history
- **controller_controls_operator:** Mays Neil → Wade Ridge Mining Inc; 1983-08-04 to 1988-05-30; source msha-controller-operator-history
- **operator_operates_mine:** Wade Ridge Mining Inc → Damerial; 1988-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wendell  Elza → Damerial; 1988-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wendell  Elza → Wade Ridge Mining Inc; 1988-05-31 to current/open; source msha-controller-operator-history