# Relationship history for MSHA mine 0200649

Current hierarchy: **Granite Construction Inc → Granite Construction Company → Tangerine Road 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

- **controller_controls_mine:** Granite Construction Inc → Tangerine Road Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ellis Transportation → Tangerine Road Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Desert Materials Company → Tangerine Road Pit; 1950-01-01 to 1979-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Bayles → Tangerine Road Pit; 1950-01-01 to 1979-08-16; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Bayles → Desert Materials Company; 1950-01-01 to 1979-08-16; source msha-controller-operator-history
- **operator_operates_mine:** Massey Sand & Rock Company → Tangerine Road Pit; 1979-08-17 to 1986-12-26; source msha-controller-operator-history
- **controller_controls_operator:** Ellis Transportation → Massey Sand & Rock Company; 1979-08-17 to 1986-12-26; source msha-controller-operator-history
- **operator_operates_mine:** Tarmac California Inc → Tangerine Road Pit; 1986-12-27 to 1992-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Tarmac Plc → Tangerine Road Pit; 1986-12-27 to 1992-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Tarmac Plc → Tarmac California Inc; 1986-12-27 to 1992-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Granite Construction Company → Tangerine Road Pit; 1992-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Granite Construction Company; 1992-06-22 to current/open; source msha-controller-operator-history