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CONTENTS
Foreword
Section Page
PART I--INTRODUCTION
CHAPTER I--HISTORY AND DESCRIPTION
1. Location 1
2. Purpose of project 1
3. Development of project prior to 1952 1
4. Physiography 3
5. General description of features 3
(a) Reservoir 3
(b) Dam
(c) Powerplant 6
6. Cost summary
CHAPTER II--GEOLOGY
7. Regional and reservoir geology.
8. Damsite geology
(a) Left abutment 9
(b) Right abutment and valley floor 12
PART II--DESIGN
CHAPTER Ill—Design --EARTH DAM
A. Foundation Design
9. General treatment 15
10. Drainage 15
11. Foundation grouting 19
B. Embankment Stability Analyses
12. Preliminary studies 19
13. Design studies 20
14. Conclusions 53
C. Materials for Embankment Construction
15. Investigations 56
(a) Borrow area A 58
(b) Borrow area B 58
(c) Borrow area C 59
(d) Borrow area D 59
(e) Wheat area 59
(f) Riprap and rockfill 59
16. Selection of borrow areas 59
17. General 60
CONTENTS (Continued)
E. Miscellaneous Details
18. Location of dam axis 62
19. Freeboard 62
20. Crest treatment 62
21. Test apparatus 66
CHAPTER IV--Design --SPILLWAY AND OUTLET WORKS
A. Spillway and Outlet Works Design Criteria
22. Design flood studies 71
(a) Historical floods 71
(b) Development of the snowmelt flood 71
(c) Rainfall analysis 71
(d) Selection of the inflow design flood 71
(e) Frequency studies 72
23. Reservoir operations 72
(a) Reservoir storage allocations 72
(b) Reservoir operation plan 72
24. Spillway requirements 75
25. Tailwater studies 75
26. Preliminary studies and designs 78
(a) 1935 design 78
(b) 1939 design 78
(c) 1947 revisions 78
(d) Definite plan report design 84
(e) Specifications design 84
B. Spillway Design
27. Description 85
28. Design capacity 85
29. Crest design 85
30. Hydraulic design of tunnel 85
31. Hydraulic model studies 85
32. Structural design 91
(a) General 91
(b) Inlet and crest structure 91
(c) Operating bridge 93
(d) Highway bridge 94
(e) Inclined shaft 94
(f) Tunnel 95
(g) Conduit 96
(h) Outlet channel 96
C. Outlet Works and Power Penstock System Design
33. Hydraulic capacities 96
34. Selection of outlet works arrangement 99
35. Description of outlet works and penstock system 99
(a) General 99
(b) Intake structures 99
(c) Tunnels 103
(d) Penstock manifolds 103
(e) Outlet works control house 107
(f) Stilling basin 107
1. Hydraulic Design of Outlet Works
36. Discharge capacities
37. Hydraulic losses
38. Stilling basin design 121
2. Structural Design of Outlet Works
39. General 122
40. Trashrack structure 122
(a) Lateral arches 123
(b) Inclined beams 123
(c) Arch thrust slabs 127
(d) Intermediate deck structure 127
(e) Longitudinal beams above elevation 5535 127
(f) Bents above elevation 5535 128
(g) Abutment walls above elevation 5535 128
(h) Bridge and gantry parking structure 128
41. Inlet lining and inclined transition 128
42. Tunnel linings 128
43. Penstock manifold anchorages and embedments 129
44. Outlet works control house structure 130
45. Stilling basin floor and walls 130
D. Outlet Works Control House
46. Architecture . 130
47. Superstructure 132
48. Heating and ventilating system 132
E . River Diversion During Construction
49. Diversion flows 132
50. Diversion plan 132
51. Diversion capacity 132
52. Model tests 134
CHAPTER V-- Design --POWER PENSTOCK AND OUTLET PIPES
53. General description 135
54. Hydraulic design data 138
55. Economic penstock diameter 138
56. Materials and working stresses 138
57. Design 138
58. Pipe fittings and appurtenances 139
59. Concrete anchors 139
60. Fabrication 139
61. Installation and coating 140
CHAPTER VI--Design--MECHANICAL AND ELECTRICAL--SPILLWAY
AND OUTLET WORKS
A. Intake Structures
62. 20- by 50-foot spillway radial gates and hoist 141
(a) Requirement 141
(b) General description 141
(c) Gate design 146
(d) Radial gate hoist design 146
63. Trashracks for outlet and power intake structures 146
(a) Description 146
(b) Construction 147
64. 19.67- by 28.03-foot fixed-wheel gates 147
(a) Requirements 147
(b) General description 147
(c) Gate design 147
65. Hoist and controls for the 19.67- by 28.03-foot fixed-wheel
gates 150
(a) Requirement 150
(b) General description 150
(c) Design 150
B. Outlet Works
66. 7.5- by 9.0-foot outlet gates 154
(a) Requirement 154
(b) General description ..." 154
(c) Design 154
67. 96-inch ring-follower gates 156
(a) Requirement 156
(b) General description 156
(c) Design 157
68. Controls for ring-follower and outlet gates 157
(a) Requirement 157
(b) General description 157
(c) Design 160
69. 96-inch hollow-jet valves and controls 160
(a) Requirements 160
(b) General description 160
(c) Valve and control unit design 163
CHAPTER VII--Design --POWERPLANT
A. Powerhouse Structure
70. Preliminary considerations for powerplant 165
71. General design 166
72. Powerplant layout 167
(a) Main unit bays '167
(b) Service bay
(c) Machine shop
73. Architecture 175
74. Loading conditions 177
76. Allowable unit stresses 177
76. Design codes and data 179
77. Structural details 179
78. Foundation and stability analysis 179
79. Service bay 182
80. Main units 182
(a) Substructure 182
(b) Intermediate structure 182
81. Second-stage concrete 183
82. Machine shop 184
83. Superstructure 184
(a) Structural steel frame 184
(b) Reinforced grouted masonry walls 184
84. Training walls 187
B. Building Facilities
85. Powerplant lighting 187
(a) Alternating-current system 187
(b) Emergency direct-current system 187
(c) Branch circuit control 187
(d) Light fixtures 187
86. Communications 189
(a) Telephone switchboard 189
(b) Coupling capacitors 189
(c) Carrier-current equipment 189
(d) Stream gage 189
87. Sanitary system 189
88. Heating and ventilating system 189
C. Major Hydraulic Equipment
89. Hydraulic turbines and governors 192
(a) Operating requirements 192
(b) Design 192
90. Governors 198