This 3D model created by the Montana Bureau of Mines and Geology Ground Water Investigation Program details the complex network of more than 2,000 miles of irrigation ditches in the Gallatin Valley, as well as how the groundwater flows in the area. Much of the groundwater in the valley is replenished by the unlined ditches, which are largely credited for maintaining groundwater levels in the area despite rapid urban and suburban development and irrigation practice changes. Groundwater in the valley flows north and west toward Nixon Gulch. Image Credit: Montana Bureau of Mines and Geology - Ground Water Investigation Program
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