# Relationship history for MSHA mine 4103994

Current hierarchy: **Virgil Ray (Bo Jack)  Davis → Davis Sand & Materials → DAVIS SAND & MATERIALS**

- 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:** Gene Davis Sand & Materials Inc → DAVIS SAND & MATERIALS; 1997-07-01 to 2001-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Gene  Davis  et al → DAVIS SAND & MATERIALS; 1997-07-01 to 2001-02-25; source msha-controller-operator-history
- **controller_controls_operator:** Gene  Davis  et al → Gene Davis Sand & Materials Inc; 1997-07-01 to 2001-02-25; source msha-controller-operator-history
- **operator_operates_mine:** Davis Sand & Materials → DAVIS SAND & MATERIALS; 2001-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Virgil Ray (Bo Jack)  Davis → DAVIS SAND & MATERIALS; 2001-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Virgil Ray (Bo Jack)  Davis → Davis Sand & Materials; 2001-02-26 to current/open; source msha-controller-operator-history