# Relationship history for MSHA mine 0300672

Current hierarchy: **Dustin  Hedger → Natural State Materials & Logistic LLC → Natural State Materials & Logistic LLC**

- 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:** Knob Sand & Gravel Company → Natural State Materials & Logistic LLC; 1950-01-01 to 1981-07-28; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Smoot → Natural State Materials & Logistic LLC; 1950-01-01 to 1981-07-28; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Smoot → Knob Sand & Gravel Company; 1950-01-01 to 1981-07-28; source msha-controller-operator-history
- **operator_operates_mine:** Tri-County Sand & Gravel, Inc. → Natural State Materials & Logistic LLC; 1981-07-29 to 2016-10-09; source msha-controller-operator-history
- **controller_controls_mine:** Ralph  Baltz → Natural State Materials & Logistic LLC; 1981-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ralph  Baltz → Tri-County Sand & Gravel, Inc.; 1981-07-29 to 2016-10-09; source msha-controller-operator-history
- **operator_operates_mine:** Natural State Materials & Logistic LLC → Natural State Materials & Logistic LLC; 2016-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dustin O  Hedger et al → Natural State Materials & Logistic LLC; 2016-10-10 to 2021-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Dustin O  Hedger et al → Natural State Materials & Logistic LLC; 2016-10-10 to 2021-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Chris L  Hedger et al → Natural State Materials & Logistic LLC; 2016-10-10 to 2021-04-08; source msha-controller-operator-history
- **controller_controls_mine:** Dustin  Hedger → Natural State Materials & Logistic LLC; 2021-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dustin  Hedger → Natural State Materials & Logistic LLC; 2021-04-09 to current/open; source msha-controller-operator-history