How would a new tunnel and a new ocean outfall be sized?
A new tunnel and a new ocean outfall would be sized based on the findings of the MFP.At a minimum, a new tunnel would need to be large enough to accommodate peak flows at the JWPCP through the year 2050 planning horizon.However, other variables would need to be factored in, including projected population growth, water conservation, and reuse.Tunnel design, construction, access requirements, and operational considerations will also impact the size of the tunnel.In an effort to increase reliability, conserve energy, and reduce operating costs, the Sanitation Districts prefer to convey as much flow by gravity as possible, which could result in a larger tunnel.
A new tunnel/ocean outfall would be sized based on the findings of the Clearwater MFP.At a minimum, a new tunnel would need to be large enough to accommodate peak flows at the JWPCP through the year 2050 planning horizon.The Sanitation Districts prefer to convey as much flow by gravity as possible to increase reliability, conserve energy, and reduce operating costs.It is estimated that the tunnel will have an excavated diameter of approximately 20 to 22 feet and an internal finished diameter of approximately 18 feet.
