Nevada County Consolidated Fire, Grass Valley Fire and Nevada City Fire  responded to reported Structure Fire in the 12000 of Willow Valley Road around 7 o’clock Saturday evening.  According to Battalion Chief Mark Buttron, Units arrived to find a two story structure with heavy fire to 25% of the structure.  A well coordinated fire attack and ventilation by crews at scene confined the majority of fire damage to the second floor. Fire remains under investigation. No injuries were reported. 5 engines and a total of 18 personel responded to the fire.