# Relationship history for MSHA mine 0405799

Current hierarchy: **Martin Marietta Materials Inc → Martin Marietta Northern California Aggregates LLC → Sanger Aggregate 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Heidelberg Materials AG → Sanger Aggregate Plant; 1999-05-12 to 2021-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → Sanger Aggregate Plant; 2005-09-15 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Heidelberg Materials AG → Sanger Aggregate Plant; 2007-08-23 to 2021-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Calaveras Materials Inc. → Sanger Aggregate Plant; 2012-04-12 to 2013-09-17; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Calaveras Materials Inc.; 2012-04-12 to 2013-09-17; source msha-controller-operator-history
- **controller_controls_mine:** April  Papich et al → Sanger Aggregate Plant; 2012-10-01 to 2025-08-05; source msha-controller-operator-history
- **operator_operates_mine:** Papich Construction Company Inc. → Sanger Aggregate Plant; 2013-09-18 to 2015-08-12; source msha-controller-operator-history
- **controller_controls_operator:** April  Papich et al → Papich Construction Company Inc.; 2013-09-18 to 2015-08-12; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Papich et al → Papich Construction Company Inc.; 2013-09-18 to 2015-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Calaveras Materials LLC → Sanger Aggregate Plant; 2015-08-13 to 2023-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Calaveras Materials LLC; 2015-08-13 to 2021-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Martin Marietta Materials Inc → Sanger Aggregate Plant; 2021-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Calaveras Materials Inc.; 2021-10-01 to 2013-09-17; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Calaveras Materials LLC; 2021-10-01 to 2023-01-19; source msha-controller-operator-history
- **operator_operates_mine:** Martin Marietta Northern California Aggregates LLC → Sanger Aggregate Plant; 2023-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Heidelberg Materials AG → Martin Marietta Northern California Aggregates LLC; 2023-01-20 to 2021-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Martin Marietta Materials Inc → Martin Marietta Northern California Aggregates LLC; 2023-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Martin Marietta Northern California Aggregates LLC; 2023-01-20 to 2007-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Granite Construction Inc → Sanger Aggregate Plant; 2025-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Papich Construction Company Inc.; 2025-08-06 to 2015-08-12; source msha-controller-operator-history