# Relationship history for MSHA mine 3304769

Current hierarchy: **David G  Elmore III; Keaton  Turner → Turner Mining Group → Appalachian 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:** Keaton  Turner et al → Appalachian Sand & Gravel; 2021-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Appalachian Real Estate LLC → Appalachian Sand & Gravel; 2021-10-04 to 2022-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Antero Resources Corporation → Appalachian Sand & Gravel; 2021-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Antero Resources Corporation → Appalachian Real Estate LLC; 2021-10-04 to 2022-02-14; source msha-controller-operator-history
- **operator_operates_mine:** Turner Mining Group → Appalachian Sand & Gravel; 2022-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keaton  Turner et al → Turner Mining Group; 2022-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David G  Elmore III et al → Turner Mining Group; 2022-02-15 to current/open; source msha-controller-operator-history