# Relationship history for MSHA mine 3003444

Current hierarchy: **David C  Homovich → DAMTOWN STONE & DRILLING INC → CHAIN GANG QUARRY**

- 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:** DAMTOWN STONE & DRILLING INC → CHAIN GANG QUARRY; 2003-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David C  Homovich → CHAIN GANG QUARRY; 2003-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David C  Homovich → DAMTOWN STONE & DRILLING INC; 2003-04-15 to current/open; source msha-controller-operator-history