# Relationship history for MSHA mine 2302366

Current hierarchy: **Lucas  Hale → Southwest Missouri Sand & Gravel → Southwest Missouri 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Smith Sand & Gravel → Southwest Missouri Sand & Gravel; 2007-07-24 to 2009-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Lena M  Smith → Southwest Missouri Sand & Gravel; 2007-07-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lena M  Smith → Smith Sand & Gravel; 2007-07-24 to 2009-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Sterling Sand & Gravel, LLC → Southwest Missouri Sand & Gravel; 2009-04-30 to 2009-07-13; source msha-controller-operator-history
- **controller_controls_mine:** Jim E  Miller et al → Southwest Missouri Sand & Gravel; 2009-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jim E  Miller et al → Sterling Sand & Gravel, LLC; 2009-04-30 to 2009-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Robin L  Miller et al → Sterling Sand & Gravel, LLC; 2009-04-30 to 2009-07-13; source msha-controller-operator-history
- **operator_operates_mine:** Smith Sand & Gravel → Southwest Missouri Sand & Gravel; 2009-07-14 to 2010-05-02; source msha-controller-operator-history
- **controller_controls_operator:** Lena M  Smith → Smith Sand & Gravel; 2009-07-14 to 2010-05-02; source msha-controller-operator-history
- **operator_operates_mine:** 4-E Sand & Gravel → Southwest Missouri Sand & Gravel; 2010-05-03 to 2013-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Eagleburger → Southwest Missouri Sand & Gravel; 2010-05-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Eagleburger → 4-E Sand & Gravel; 2010-05-03 to 2013-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Southwest Missouri Sand & Gravel → Southwest Missouri Sand & Gravel; 2013-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lucas  Hale → Southwest Missouri Sand & Gravel; 2013-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lucas  Hale → Southwest Missouri Sand & Gravel; 2013-07-10 to current/open; source msha-controller-operator-history