# Relationship history for MSHA mine 0405343

Current hierarchy: **Martin Marietta Materials Inc → Mission Valley Rock Company → Oakland Sand Co**

- 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:** Bob  Jones Et Al → Oakland Sand Co; 1950-01-01 to 2005-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Berkeley Ready Mix → Oakland Sand Co; 1997-07-01 to 2004-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Harold  Jones Et Al → Oakland Sand Co; 1997-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold  Jones Et Al → Berkeley Ready Mix; 1997-07-01 to 2004-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Bob  Jones Et Al → Berkeley Ready Mix; 1997-07-01 to 2004-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Mission Valley Rock Company → Oakland Sand Co; 2004-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bob  Jones Et Al → Mission Valley Rock Company; 2004-11-01 to 2005-06-19; source msha-controller-operator-history
- **controller_controls_operator:** Harold  Jones Et Al → Mission Valley Rock Company; 2004-11-01 to 2005-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Oakland Sand Co; 2005-06-20 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Mission Valley Rock Company; 2005-06-20 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Oakland Sand Co; 2007-08-23 to 2021-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Mission Valley Rock Company; 2007-08-23 to 2021-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Oakland Sand Co; 2021-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Mission Valley Rock Company; 2021-10-01 to current/open; source msha-controller-operator-history