# Relationship history for MSHA mine 3800115

Current hierarchy: **David Ryan  Williams → Atomic Sand, LLC → Atomic Mine**

- 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:** Augusta Sand & Gravel Inc → Atomic Mine; 1950-01-01 to 1993-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Milton R  Boyette  et al → Atomic Mine; 1950-01-01 to 1994-11-09; source msha-controller-operator-history
- **controller_controls_operator:** Milton R  Boyette  et al → Augusta Sand & Gravel Inc; 1950-01-01 to 1993-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Forsell  et al → Atomic Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Foster Dixiana Corporation → Atomic Mine; 1993-09-01 to 2007-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Forsell  et al → Foster Dixiana Corporation; 1993-09-01 to 2007-10-19; source msha-controller-operator-history
- **operator_operates_mine:** South Carolina Minerals Inc. → Atomic Mine; 2007-10-20 to 2018-06-14; source msha-controller-operator-history
- **controller_controls_mine:** F Browne Gregg Trust → Atomic Mine; 2007-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** F Browne Gregg Trust → South Carolina Minerals Inc.; 2007-10-20 to 2018-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Atomic Sand, LLC → Atomic Mine; 2018-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David Ryan  Williams → Atomic Mine; 2018-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David Ryan  Williams → Atomic Sand, LLC; 2018-06-15 to current/open; source msha-controller-operator-history