# Relationship history for MSHA mine 1518671

Current hierarchy: **Ford F  Graham; Kevin C  Davis → Vulcan Highwall Mining, LLC → Town Creek Mine**

- 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:** Nexgen Highwall Mining Services, LLC → Town Creek Mine; 2003-09-17 to 2006-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Charles S  McNeil → Town Creek Mine; 2003-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles S  McNeil → Nexgen Highwall Mining Services, LLC; 2003-09-17 to 2006-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Highwall Mining, LLC → Town Creek Mine; 2006-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kevin C  Davis et al → Town Creek Mine; 2006-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin C  Davis et al → Vulcan Highwall Mining, LLC; 2006-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ford F  Graham et al → Vulcan Highwall Mining, LLC; 2006-06-01 to current/open; source msha-controller-operator-history