1. Recirculation incubation chiller system

2. Reservoir Reuse water aeration column Well water make up column Two stage chiller unit Recirculation pumps Input well water 1,000 gal

6. Controller for the two 7 1/2 hp motors Flow meter

7. Average cost per month to operate the large chiller and hatchery power is $12,368.19 Average cost per month to operate the small chiller and hatchery power is $4,710.28 The Difference in cost per month is $7,657.91 The large chiller is operated four months of the year by itself and three months in conjunction with the small chiller. The small chiller is operated five months of the year by itself. Cost saving calculated by Avista Power Monthly energy savings with new system 94,107 kW hr/month Monthly demand savings with new system 129 kW/month Monthly energy cost Savings $5,866/month Monthly demand cost savings $612/month Based on the Avista cost savings estimations, the new system saves us approximately…….. $29,330/year

8. First year of full incubation at Kooskia National Fish Hatchery Total eggs on station764,546 Total eyed-eggs on station729,476Percent eye-up 95.4 Total hatch716,077Percent hatch 93.66 Advantages Water is recirculated Only 10 gallons/min is added into the system at all times Going to a smaller chiller system has saved us $$$$$ Ability to control water temperature to the Heath stacks Disadvantages Having to be more diligent in making sure that chemicals are discharged out of the system More time consuming for personnel to perform egg treatments Inability to adjust individual stack temperatures