# Relationship history for MSHA mine 1001730

Current hierarchy: **Dusty  Smith → S&R Dirt Works → Kelley's Gravel Inc**

- 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

- **operator_operates_mine:** K & G Contractors Inc → Kelley's Gravel Inc; 1986-04-01 to 1994-10-25; source msha-controller-operator-history
- **controller_controls_mine:** John  Kelley → Kelley's Gravel Inc; 1986-04-01 to 1994-10-25; source msha-controller-operator-history
- **controller_controls_operator:** John  Kelley → K & G Contractors Inc; 1986-04-01 to 1994-10-25; source msha-controller-operator-history
- **operator_operates_mine:** Kelley's Gravel Inc → Kelley's Gravel Inc; 1994-10-26 to 2025-09-24; source msha-controller-operator-history
- **controller_controls_mine:** Jan  Kelley → Kelley's Gravel Inc; 1994-10-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jan  Kelley → Kelley's Gravel Inc; 1994-10-26 to 2025-09-24; source msha-controller-operator-history
- **operator_operates_mine:** S&R Dirt Works → Kelley's Gravel Inc; 2025-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dusty  Smith → Kelley's Gravel Inc; 2025-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dusty  Smith → S&R Dirt Works; 2025-09-25 to current/open; source msha-controller-operator-history