# Relationship history for MSHA mine 0404941

Current hierarchy: **Granite Construction Inc → Granite Construction Company → GRANITE CONSTRUCTION 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:** Granite Construction Inc → GRANITE CONSTRUCTION CO; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Christie Gold Ltd → GRANITE CONSTRUCTION CO; 1988-05-01 to 1990-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Wishart John → GRANITE CONSTRUCTION CO; 1988-05-01 to 1990-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Wishart John → Christie Gold Ltd; 1988-05-01 to 1990-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Tarmac Plc → GRANITE CONSTRUCTION CO; 1988-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Massey Sand & Rock Company → GRANITE CONSTRUCTION CO; 1990-04-01 to 1992-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Tarmac Plc → Massey Sand & Rock Company; 1990-04-01 to 1992-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Granite Construction Company → GRANITE CONSTRUCTION CO; 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