# Relationship history for MSHA mine 0404949

Current hierarchy: **Granite Construction Inc → Granite Construction Company → Seirra Pacific Materials**

- 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:** Granite Construction Inc → Seirra Pacific Materials; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Acme Rock → Seirra Pacific Materials; 1988-06-01 to 2003-09-30; source msha-controller-operator-history
- **controller_controls_mine:** R W  Gilkey → Seirra Pacific Materials; 1988-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R W  Gilkey → Acme Rock; 1988-06-01 to 2003-09-30; source msha-controller-operator-history
- **controller_controls_mine:** W (Wallace) Jaxon  Baker → Seirra Pacific Materials; 1998-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Avenal Aggregate & Asphalt → Seirra Pacific Materials; 2003-10-01 to 2014-10-14; source msha-controller-operator-history
- **controller_controls_operator:** W (Wallace) Jaxon  Baker → Avenal Aggregate & Asphalt; 2003-10-01 to 2014-10-14; source msha-controller-operator-history
- **controller_controls_mine:** April  Papich et al → Seirra Pacific Materials; 2012-10-01 to 2025-08-05; source msha-controller-operator-history
- **operator_operates_mine:** Papich Construction Company, Inc. → Seirra Pacific Materials; 2014-10-15 to 2026-03-02; source msha-controller-operator-history
- **controller_controls_operator:** April  Papich et al → Papich Construction Company, Inc.; 2014-10-15 to 2025-08-05; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Papich et al → Papich Construction Company, Inc.; 2014-10-15 to 2025-08-05; source msha-controller-operator-history
- **controller_controls_mine:** Granite Construction Inc → Seirra Pacific Materials; 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 2026-03-02; source msha-controller-operator-history
- **operator_operates_mine:** Granite Construction Company → Seirra Pacific Materials; 2026-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Granite Construction Company; 2026-03-03 to current/open; source msha-controller-operator-history