# Relationship history for MSHA mine 2302164

Current hierarchy: **David K  Willard → Willard Quarries, Inc. → Willard Quarries - Hancock**

- 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:** David K  Willard et al → Willard Quarries - Hancock; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Kelley → Willard Quarries - Hancock; 1992-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kelley Sand & Gravel Incorporated → Willard Quarries - Hancock; 1998-01-01 to 2012-12-09; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Kelley → Kelley Sand & Gravel Incorporated; 1998-01-01 to 2012-12-09; source msha-controller-operator-history
- **operator_operates_mine:** Willard Quarries, Inc. → Willard Quarries - Hancock; 2012-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David K  Willard et al → Willard Quarries, Inc.; 2012-12-10 to current/open; source msha-controller-operator-history