# Relationship history for MSHA mine 1519340

Current hierarchy: **Clark D  Pergrem → Matt/Co, Inc. → Tollage Creek**

- 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:** Coal Mining Inc → Tollage Creek; 2008-10-30 to 2014-08-05; source msha-controller-operator-history
- **controller_controls_mine:** Clark D  Pergrem → Tollage Creek; 2008-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clark D  Pergrem → Coal Mining Inc; 2008-10-30 to 2014-08-05; source msha-controller-operator-history
- **controller_controls_mine:** Clark D  Pergrem → Tollage Creek; 2013-10-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Matt/Co, Inc. → Tollage Creek; 2014-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clark D  Pergrem → Matt/Co, Inc.; 2014-08-06 to current/open; source msha-controller-operator-history