# Relationship history for MSHA mine 0103377

Current hierarchy: **Ford F  Graham; Kevin C  Davis → Vulcan Hargrove, L.L.C. → Hargrove Mine Site**

- 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:** Vulcan Hargrove, L.L.C. → Hargrove Mine Site; 2007-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kevin C  Davis et al → Hargrove Mine Site; 2007-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin C  Davis et al → Vulcan Hargrove, L.L.C.; 2007-01-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ford F  Graham et al → Vulcan Hargrove, L.L.C.; 2007-01-30 to current/open; source msha-controller-operator-history