# Relationship history for MSHA mine 4608849

Current hierarchy: **Andrew B  Jordon → Pritchard Mining Company Inc → Dry Branch Surface No 1**

- 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:** Andrew B  Jordon → Dry Branch Surface No 1; 1992-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pritchard Mining Company Inc → Dry Branch Surface No 1; 2000-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Andrew B  Jordon → Pritchard Mining Company Inc; 2000-12-01 to current/open; source msha-controller-operator-history