The Dalles Fish Water Units 1 & 2 The Dalles Fish Water Turbines Phase 1A Report Draft Final Report Prepared By: US Army Corps of Engineers Portland District May 2018 Table of Contents 1 INTRODUCTION .............................................................................................................................................. 7 1.1 PURPOSE........................................................................................................................................................... 7 1.2 PRODUCT DEVELOPMENT TEAM ............................................................................................................................ 8 1.3 DESIGN GUIDANCE .............................................................................................................................................. 9 1.4 SCHEDULE ......................................................................................................................................................... 9 1.5 BACKGROUND .................................................................................................................................................... 9 1.6 UPRATING CONSIDERATIONS ............................................................................................................................... 12 1.7 BIOLOGICAL AND CONSTRUCTION CONSIDERATIONS ................................................................................................ 12 2 EXISTING CONDITIONS ................................................................................................................................. 12 2.1 FISH PASSAGE AND ENDANGERED SPECIES ACT SECTION 7(A)(2) CONSULTATION .......................................................... 12 2.2 FISH LADDER .................................................................................................................................................... 13 2.2.1 Fish Passage ......................................................................................................................................... 13 2.2.2 Fish Ladder Existing Conditions ........................................................................................................... 13 2.2.3 Adult Fisheries Criteria ......................................................................................................................... 15 2.3 HYDRAULICS .................................................................................................................................................... 16 2.3.1 River Flows (Summary Hydrograph) .................................................................................................... 16 2.3.2 Total Head on the Fish Units ................................................................................................................ 16 2.4 GENERATOR..................................................................................................................................................... 17 2.4.1 Stator End-Winding Inspection ............................................................................................................ 17 2.4.2 Slip Ring Brush Assembly ..................................................................................................................... 19 2.5 EXCITATION SYSTEM .......................................................................................................................................... 21 2.6 TURBINE ......................................................................................................................................................... 22 2.6.1 Water Passageway and Turbine Pit ..................................................................................................... 23 2.6.2 turbine runner ..................................................................................................................................... 23 2.6.3 Head Cover .......................................................................................................................................... 24 2.6.4 Turbine Shaft ....................................................................................................................................... 25 2.6.5 Turbine Guide Bearing ......................................................................................................................... 25 2.6.6 Wicket Gates ........................................................................................................................................ 25 2.6.7 Wicket Gate Operating Ring and Mechanism ...................................................................................... 25 2.6.8 Wicket Gate Servomotor ..................................................................................................................... 26 2.6.9 Wicket Gate Bushings .......................................................................................................................... 26 2.6.10 Generator Shaft ................................................................................................................................... 26 2.6.11 Generator Guide Bearings ................................................................................................................... 27 2.6.12 Thrust/Upper Guide Bearing Assembly ............................................................................................... 27 2.6.13 Turbine Performance of Existing Units ................................................................................................ 28 2.7 ANCILLARY EQUIPMENT ..................................................................................................................................... 29 2.7.1 Governor .............................................................................................................................................. 29 2.7.2 Thrust/Upper Guide Bearing Oil Coolers ............................................................................................. 29 2.7.3 Lower Guide Bearing Oil Cooler ........................................................................................................... 30 2.7.4 Turbine Guide Bearing ......................................................................................................................... 30 2.7.5 Surface Air Coolers ............................................................................................................................... 30 2.7.6 Water and Oil Piping ............................................................................................................................ 30 2.7.7 Brake and Jack System ......................................................................................................................... 30 2.7.8 E-Closure System ................................................................................................................................. 31 2.8 OTHER ELECTRICAL COMPONENTS ....................................................................................................................... 31 3 STRUCTURAL ENGINEERING ......................................................................................................................... 32 3.1 CRITERIA AND CONSTRAINTS ....................................................................................................................... 32 3.1.1 Fish Unit Outfall into AWS ................................................................................................................... 32 4 HYDRAULIC DESIGN ...................................................................................................................................... 33 4.1 LIMITED FISH LADDER MODEL ............................................................................................................................. 33 4.2 CRITERIA AND CONSTRAINTS ............................................................................................................................... 35 5 TURBINE ENGINEERING ................................................................................................................................ 36 5.1 TURBINE CRITERIA AND CONSTRAINTS ................................................................................................................... 36 5.1.1 Criteria ................................................................................................................................................. 36 5.1.2 Constraints ........................................................................................................................................... 37 5.2 TURBINE SUB-ALTERNATIVES....................................................................................................................... 38 5.2.1 Alternatives Analysis ............................................................................................................................ 38 5.2.2 Alternative Analysis Assumptions ........................................................................................................ 38 5.2.3 Turbine Sub-Alternatives That were Considered ................................................................................. 38 6 GENERATOR ENGINEERING .......................................................................................................................... 40 6.1 ELECTRICAL TESTING .........................................................................................................................................