# Relationship history for MSHA mine 4105728

Current hierarchy: **CBC Partners  LTD; Joe  Bland → Central Texas Stone And Aggregate → Marble Falls**

- 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:** Joe E  Bland → Marble Falls; 2007-10-04 to 2024-02-06; source msha-controller-operator-history
- **operator_operates_mine:** Central Texas Stone And Aggregate → Marble Falls; 2024-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe E  Bland → Central Texas Stone And Aggregate; 2024-02-07 to 2024-02-06; source msha-controller-operator-history
- **controller_controls_mine:** CBC Partners  LTD et al → Marble Falls; 2024-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CBC Partners  LTD et al → Central Texas Stone And Aggregate; 2024-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Bland et al → Central Texas Stone And Aggregate; 2024-02-07 to current/open; source msha-controller-operator-history