# Relationship history for MSHA mine 2301658

Current hierarchy: **Sam  S  Weathers → W & W Sand & Gravel , Inc. → W & W Sand & Gravel, Inc. #1**

- 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:** Mc Donald County Sand & Gravel Company → W & W Sand & Gravel, Inc. #1; 1950-01-01 to 1979-07-23; source msha-controller-operator-history
- **controller_controls_mine:** Mc Donald County Sand & Gravel Company → W & W Sand & Gravel, Inc. #1; 1950-01-01 to 1979-07-23; source msha-controller-operator-history
- **controller_controls_operator:** Mc Donald County Sand & Gravel Company → Mc Donald County Sand & Gravel Company; 1950-01-01 to 1979-07-23; source msha-controller-operator-history
- **operator_operates_mine:** Buttram Sand & Gravel → W & W Sand & Gravel, Inc. #1; 1979-07-24 to 1980-11-04; source msha-controller-operator-history
- **controller_controls_mine:** Buttram Ray → W & W Sand & Gravel, Inc. #1; 1979-07-24 to 1980-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Buttram Ray → Buttram Sand & Gravel; 1979-07-24 to 1980-11-04; source msha-controller-operator-history
- **operator_operates_mine:** B & B Sand & Gravel Inc → W & W Sand & Gravel, Inc. #1; 1980-11-05 to 2003-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Ron  Beshears → W & W Sand & Gravel, Inc. #1; 1980-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ron  Beshears → B & B Sand & Gravel Inc; 1980-11-05 to 2003-06-30; source msha-controller-operator-history
- **operator_operates_mine:** W & W Sand & Gravel , Inc. → W & W Sand & Gravel, Inc. #1; 2003-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sam  S  Weathers → W & W Sand & Gravel, Inc. #1; 2003-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sam  S  Weathers → W & W Sand & Gravel , Inc.; 2003-07-01 to current/open; source msha-controller-operator-history