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Every year Northern Water collects and delivers more than 200,000 acre-feet of supplemental water from the Colorado-Big Thompson (C-BT) Project . The water is collected from the melting snowpack in

Touring Our Facilities Northern Water offers several opportunities to learn about our projects and facilities through tours. The Conservation Campus and Gardens and adjacent Interpretive Area are

Boulder Reservoir, located on the city’s northeast side, supplies Colorado-Big Thompson (C-BT) Project water to Boulder and irrigated farms and ranches in Weld and Boulder counties. The decision to

Willow Creek Reservoir, located two miles west of Lake Granby, captures snowmelt runoff in the Willow Creek Basin. Willow Creek enters the west end of the reservoir and exits the east end at the dam

Shadow Mountain Reservoir, located between Lake Granby and Grand Lake, acts as a conduit to transport Colorado-Big Thompson (C-BT) Project water from Lake Granby to Grand Lake and the Adams Tunnel

Pinewood Reservoir, located 3 miles west of Flatiron Power Plant, is a key component of the Colorado-Big Thompson (C-BT) Project power system. It is the afterbay to the Pole Hill Power Plant and the

Mary’s Lake is located in an enlarged natural basic several miles south of downtown Estes Park. It is part of the Colorado-Big Thompson (C-BT) Project power system. Mary’s Lake serves two primary

Lake Granby is the largest storage reservoir in the Colorado-Big Thompson (C-BT) Project and the second largest water body in the state. Water is pumped from Lake Granby via the Farr Pump Plant to

Lake Estes, formed by Olympus Dam, is located just east of downtown Estes Park. The lake plays an important role in the Colorado-Big Thompson (C-BT) Project power system. Lake Estes acts as an

Horsetooth Reservoir, named for a distinctive local geological outcropping, is the largest reservoir in the Colorado-Big Thompson (C-BT) Project East Slope distribution system. Located west of Fort