# Relationship history for MSHA mine 0401869

Current hierarchy: **Granite Construction Inc → Granite Construction Company → Five Bridges 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:** Granite Construction Inc → Five Bridges Aggregate Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nikolaus & Nikolaus Inc → Five Bridges Aggregate Plant; 1950-01-01 to 2001-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Dennis P  Nikolaus → Five Bridges Aggregate Plant; 1950-01-01 to 2001-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Dennis P  Nikolaus → Nikolaus & Nikolaus Inc; 1950-01-01 to 2001-05-07; source msha-controller-operator-history
- **operator_operates_mine:** Intermountain Slurry Seal Inc → Five Bridges Aggregate Plant; 2001-05-08 to 2009-04-27; source msha-controller-operator-history
- **controller_controls_mine:** Granite Construction Inc → Five Bridges Aggregate Plant; 2001-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Intermountain Slurry Seal Inc; 2001-05-08 to 2009-04-27; source msha-controller-operator-history
- **operator_operates_mine:** Granite Construction Company → Five Bridges Aggregate Plant; 2009-04-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Granite Construction Company; 2009-04-28 to current/open; source msha-controller-operator-history