# Relationship history for MSHA mine 1517830

Current hierarchy: **Carolyn  Adams; Roy  Adams → Daviess County Sand & Gravel, Inc. → Daviess County Sand & Gravel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Carolyn  Adams  et al → Daviess County Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Daviess County Sand & Gravel Inc → Daviess County Sand & Gravel; 1996-08-01 to 1997-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Carolyn  Adams  et al → Daviess County Sand & Gravel Inc; 1996-08-01 to 1997-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Roy  Adams  et al → Daviess County Sand & Gravel Inc; 1996-08-01 to 1997-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Liter'S Of Western Kentucky Inc → Daviess County Sand & Gravel; 1998-01-01 to 2002-09-09; source msha-controller-operator-history
- **controller_controls_mine:** Robert T  Liter et al → Daviess County Sand & Gravel; 1998-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert T  Liter et al → Liter'S Of Western Kentucky Inc; 1998-01-01 to 2002-09-09; source msha-controller-operator-history
- **operator_operates_mine:** Daviess County Sand & Gravel, Inc. → Daviess County Sand & Gravel; 2002-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carolyn  Adams  et al → Daviess County Sand & Gravel, Inc.; 2002-09-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roy  Adams  et al → Daviess County Sand & Gravel, Inc.; 2002-09-10 to current/open; source msha-controller-operator-history