# Relationship history for MSHA mine 3609034

Current hierarchy: **Bill  O'Dell; Bradley  Strickland → Bradley Strickland → Bill's Quarry**

- 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:** Bradley Strickland → Bill's Quarry; 2001-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bill  O'Dell et al → Bill's Quarry; 2001-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bill  O'Dell et al → Bradley Strickland; 2001-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bradley  Strickland et al → Bradley Strickland; 2001-09-26 to current/open; source msha-controller-operator-history