# Relationship history for MSHA mine 2600053

Current hierarchy: **RSP Minerals → VM Buyer LLC → Blanco 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

- **controller_controls_mine:** R T Vanderbilt Company Inc → Blanco Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Vanderbilt Minerals Corp → Blanco Mine; 1993-11-01 to 2007-03-26; source msha-controller-operator-history
- **controller_controls_operator:** R T Vanderbilt Company Inc → Vanderbilt Minerals Corp; 1993-11-01 to 2007-03-26; source msha-controller-operator-history
- **controller_controls_mine:** R T Vanderbilt Company Inc → Blanco Mine; 2007-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Vanderbilt Minerals LLC → Blanco Mine; 2007-03-27 to 2026-06-09; source msha-controller-operator-history
- **controller_controls_operator:** R T Vanderbilt Company Inc → Vanderbilt Minerals LLC; 2007-03-27 to 2026-06-09; source msha-controller-operator-history
- **operator_operates_mine:** VM Buyer LLC → Blanco Mine; 2026-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** RSP Minerals → Blanco Mine; 2026-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** RSP Minerals → VM Buyer LLC; 2026-06-10 to current/open; source msha-controller-operator-history