# Relationship history for MSHA mine 1202237

Current hierarchy: **Dawn  Littleton → L&L Bulk Transport, Inc. → L&L Bulk Plant 3**

- 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:** White River Gravel Company Inc → L&L Bulk Plant 3; 1998-08-01 to 2015-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Richard E  Wallace → L&L Bulk Plant 3; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard E  Wallace → White River Gravel Company Inc; 1998-08-01 to 2015-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Dawn  Littleton → L&L Bulk Plant 3; 2013-04-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** HMI Sand and Gravel LLC → L&L Bulk Plant 3; 2015-10-01 to 2019-11-14; source msha-controller-operator-history
- **controller_controls_mine:** D Michael  Harding → L&L Bulk Plant 3; 2015-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** D Michael  Harding → HMI Sand and Gravel LLC; 2015-10-01 to 2019-11-14; source msha-controller-operator-history
- **operator_operates_mine:** L&L Bulk Transport, Inc. → L&L Bulk Plant 3; 2019-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dawn  Littleton → L&L Bulk Transport, Inc.; 2019-11-15 to current/open; source msha-controller-operator-history