# Relationship history for MSHA mine 4104530

Current hierarchy: **37 Building Products Ltd → 37 Trucking, LLC. → DeCordova Materials**

- 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:** Granbury Materials LLC → DeCordova Materials; 2005-04-04 to 2014-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Wayne  Wienecke → DeCordova Materials; 2005-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Wienecke → Granbury Materials LLC; 2005-04-04 to 2014-07-31; source msha-controller-operator-history
- **operator_operates_mine:** 37 Trucking, LLC. → DeCordova Materials; 2014-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** 37 Building Products Ltd → DeCordova Materials; 2014-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** 37 Building Products Ltd → 37 Trucking, LLC.; 2014-08-01 to current/open; source msha-controller-operator-history