rewrite For both Opetion 1 & 2, Struictural column conditins asseessment and fixies need to be performed as needed. The Monorail cost for Buffing and Painting not includded in the estimate. The electrical cables/ other elctrical parts need to be replaxced based on the current age. Channel 1 and downstream asset rehab project is palnnned fduring 2032+. net book value of the clamshellneed to be written off based onthe proposed channel 1 design Option 1 : LOng Lead time to design, fabricate and pilot prototype testing upto 1 Year, Any product design / Functional deficiency, Operatrional and maintenance issues can be indentified after completion of instatlation and testing. The Camera for viewing grit remacal when smudged with Grit and effluent may deem inefficient. T The system reliability is unknown due to the hydaulic controls. Lower NPV Value Option 2 : Refurbishing the clamshell electrical/mechanical parts will result in new components but still be left with the core components that are weathered and aged and highly likely to fail. This creates assest with Low system reliability.Lower NPV Value Option 3: Minimal Operational and maintenance need. No Capital investment needed. Peridoivcal i.e annuall removal of griut will ensure the Grit Tanks have