# Relationship history for MSHA mine 1600865

Current hierarchy: **M Matt  Durand → B & D Materials, LLC → B & D SAND PIT**

- 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:** J B Talley & Company Inc → B & D SAND PIT; 1950-01-01 to 1991-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Willis J  Talley → B & D SAND PIT; 1950-01-01 to 1991-06-14; source msha-controller-operator-history
- **controller_controls_operator:** Willis J  Talley → J B Talley & Company Inc; 1950-01-01 to 1991-06-14; source msha-controller-operator-history
- **operator_operates_mine:** J B Talley & Company Inc → B & D SAND PIT; 1991-06-15 to 1996-06-04; source msha-controller-operator-history
- **controller_controls_mine:** Raymond  Smith → B & D SAND PIT; 1991-06-15 to 1996-06-04; source msha-controller-operator-history
- **controller_controls_operator:** Raymond  Smith → J B Talley & Company Inc; 1991-06-15 to 1996-06-04; source msha-controller-operator-history
- **operator_operates_mine:** B & D Materials LLC → B & D SAND PIT; 1996-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** M Matt  Durand et al → B & D SAND PIT; 1996-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** M Matt  Durand et al → B & D Materials LLC; 1996-06-05 to current/open; source msha-controller-operator-history