# Relationship history for MSHA mine 0801134

Current hierarchy: **Joseph H  Anderson → A-Mining Group II LLC. → A-Mining Group II 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Michael W  Roberts → A-Mining Group II LLC.; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William C  Lee Jr et al → A-Mining Group II LLC.; 1988-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** River Bend Sand Company Inc → A-Mining Group II LLC.; 1989-08-01 to 1991-10-31; source msha-controller-operator-history
- **controller_controls_operator:** William C  Lee Jr et al → River Bend Sand Company Inc; 1989-08-01 to 1991-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Raymond R  Lee et al → River Bend Sand Company Inc; 1989-08-01 to 1991-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Roberts Sand Company LLLP → A-Mining Group II LLC.; 1991-11-01 to 2019-08-30; source msha-controller-operator-history
- **controller_controls_operator:** Michael W  Roberts → Roberts Sand Company LLLP; 1991-11-01 to 2019-08-30; source msha-controller-operator-history
- **operator_operates_mine:** A-Mining Group II LLC. → A-Mining Group II LLC.; 2019-08-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph H  Anderson et al → A-Mining Group II LLC.; 2019-08-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph H  Anderson et al → A-Mining Group II LLC.; 2019-08-31 to current/open; source msha-controller-operator-history