# Relationship history for MSHA mine 4202485

Current hierarchy: **Granite Construction Inc → Granite Construction Company → Coyote Aggregate**

- 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 → Coyote Aggregate; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blue Rock Pit LLC → Coyote Aggregate; 2007-10-01 to 2008-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Ammon L  Pentz  et al → Coyote Aggregate; 2007-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ammon L  Pentz  et al → Blue Rock Pit LLC; 2007-10-01 to 2008-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Tyler M  Pettit  et al → Blue Rock Pit LLC; 2007-10-01 to 2008-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Granite Construction Company → Coyote Aggregate; 2008-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Granite Construction Inc → Granite Construction Company; 2008-04-01 to current/open; source msha-controller-operator-history