Middle Fork American River near American River Pump Station
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Making RiverArc a Reality

RiverArc is currently envisioned to be constructed in three phases. The first phase treatment plant capacity will be in the range of 10 - 40 million gallons per day (mgd). The Phase 2 treatment and conveyance capacity is expected to add an additional 30 - 60 mgd, which will ensure continued reliable regional water supplies. The Phase 3 build-out capacity would be determined to match the water supply needs of the region. It is anticipated that the current project phases and capacities will be further refined as regional water agencies continue to evaluate their water demands and the sustainability and reliability of their water supplies.

Since RiverArc is well positioned for local, state and federal funding, stakeholders and water agencies are working quickly to secure project development funding. Project collaborators have completed the initial studies and plans which show RiverArc is well positioned to obtain outside funding.

Early Project Planning: 2017 - 2022
  • Project definition, including project phasing and capacity alternatives, facility locations, feasibility-level evaluations

  • Strategic funding plan development and implementation

  • Modeling to quantify project benefits to the CVP and state water reliability

  • Term sheet development for use of existing intakes

  • Water supply assessment

  • Environmental Constraints Analysis

Phase 1 Planning: 2022 - 2026
  • Environmental documentation and permitting

  • Project governance establishment

  • Basis of design report development

  • Water rights analysis

  • Surface water/groundwater modeling

  • Existing intake pump upgrade

Phase 1: 2026 - 2030
  • Design and construct raw water infrastructure to connect the existing Sacramento River diversion facility to the water treatment plant

  • Design and construct phase one of a new water treatment facility

  • Connect finished water transmission pipelines to existing distribution systems to serve water to both municipal and industrial customers and allow for conjunctive use of surface water and groundwater

Phase 2: 2040+
  • Expand water supply availability by connecting Sacramento River and American River supplies

  • Expand the water treatment facility

Phase 3: 2050+
  • Plan and construct necessary infrastructure to add operational flexibility for the Central Valley Project and minimize reliance on the American River watershed

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