In the pantheon of river conservationists, few may leave a legacy larger than that of Roger Muggli, a third-generation farmer in eastern Montana. Thanks to his decades of efforts to help fish safely pass 12 Mile Dam, an irrigation diversion structure built in 1885 on the Tongue River, a major tributary to the Yellowstone, Muggli...

In the pantheon of river conservationists, few may leave a legacy larger than that of Roger Muggli, a third-generation farmer in eastern Montana. Thanks to his decades of efforts to help fish safely pass 12 Mile Dam, an irrigation diversion structure built in 1885 on the Tongue River, a major tributary to the Yellowstone, Muggli...