Iriri River Terra do Meio Ecological Station. The river varies greatly in volume depending on the season, and in the dry season include waterfalls, rocks and rapids. The Iriri River flows through the Tapajós-Xingu moist forests ecoregion. The river is rich in fish, including many species found only here and in the Xingu. Large sections remain unexplored due to its remoteness in a region surrounded by Amazon rainforest, and sections with strong current and cataracts. Iriri River The Iriri River () is a large tributary of the Xingu River in Brazil, in the state of Pará. It is long making it the
Upper American River Project fish passage by the project's dams, which segment parts of the upper South Fork American River, the Rubicon River and their tributaries. Water is diverted from the Rubicon River to a storage reservoir, Loon Lake, from which it is released through the Loon Lake Powerhouse to Gerle Creek. This water is intercepted and diverted into Silver Creek, a tributary of the South Fork American River, flowing through the Robbs Peak Powerhouse into Union Valley Reservoir, the project's principal reservoir. Water from Ice House Reservoir also enters Union Valley via the Jones Fork Powerhouse. From Union Valley, water flows through the