Quality materials and timely service drive success for every heavy construction project. For over thirty years Mountain Loop Mine has served road, bridge, and tunnel builders in the state of Washington. Today we continue to provide the Northwest region with the highest quality controlled aggregate, convenient backhaul disposal, and unmatched same-day customer service. Contact information (360) 691-6320 26709 Mountain Loop Highway, Granite Falls, WA, 98252 https://mlmine.net/ [email protected] read full review »