# Relationship history for MSHA mine 1001753

Current hierarchy: **Brian L  Wood → B F Redi-Mix Inc → B F Redi-Mix Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** B F Road & Rock Inc → B F Redi-Mix Plant; 1986-07-01 to 1994-03-28; source msha-controller-operator-history
- **controller_controls_mine:** Bill V  Poulton → B F Redi-Mix Plant; 1986-07-01 to 1994-03-28; source msha-controller-operator-history
- **controller_controls_operator:** Bill V  Poulton → B F Road & Rock Inc; 1986-07-01 to 1994-03-28; source msha-controller-operator-history
- **operator_operates_mine:** B F Redi-Mix Inc → B F Redi-Mix Plant; 1994-03-29 to 1998-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Alan  Winkelseth et al → B F Redi-Mix Plant; 1994-03-29 to 1998-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Alan  Winkelseth et al → B F Redi-Mix Inc; 1994-03-29 to 1998-06-29; source msha-controller-operator-history
- **operator_operates_mine:** B F Redi-Mix Inc → B F Redi-Mix Plant; 1998-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian L  Wood → B F Redi-Mix Plant; 1998-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian L  Wood → B F Redi-Mix Inc; 1998-06-30 to current/open; source msha-controller-operator-history