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<br />~ <br />:'") <br />~ <br />C'IJ <br />o <br /> <br />1 <br /> <br />XIV <br /> <br />CONTENTS <br /> <br />Section <br /> <br />Page <br /> <br />CHAPTER IX-FEATURES OF THE FOUNDATION <br />157 General description __...__________________________.._______~__________ <br />158 Canyon-wall stripping __________________________________~__________ <br />159 Excavation for abutments of dam___________________.___n__~__________ <br />160 Excavation for base of dam______________________n________~__________ <br />161 Porosity and seepage_______ _____ ______ _ ____ _ _ __ _ ____ _______ _ ____ __ _ __ <br />162 Hot springs ____________________________________._______..__________ <br />163 The foundation as affected by faulfL___nnn_nn__nn_n..__nnnn <br />164 Foundation drainage and grouting programnn_n_________n.._nn_nn <br /> <br />167 <br />172 <br />172 <br />173 <br />174 <br />177 <br />180 <br />181 <br /> <br />CHAPTER X-GEOLOGICAL STUDIES FOR AUXILIARY <br />STRUCTURES <br /> <br />RIVER DIVERSION SYSTEM <br />1. General <br /> <br />165 <br /> <br />General description <br /> <br />--- - - -- ----- - - ----- -- --- ---.- - - - - -- - -- ------- -- --- <br /> <br />191 <br /> <br />2. DiverJion Tunneh <br />166 General description ____h_________________u_u.__________________h_ 192 <br />167 General geology ______~____u_____u________________________________ 193 <br />168 Geology of Nevada diversion tunnelsuu______uu_________u__u__hu 193 <br />169 Geology of Arizona diversion tunnels________u___u_.u__hu__________ 195 <br /> <br />3. CofferdamJ <br />170 Preliminary construction ____________hu_h_________________________ 195 <br />171 Upstream cofferdam _________________________________________________ 196 <br />172 Downstream cofferdam ____________________uu____uu_____________ 196 <br />173 Rock barrier ______________________________________________________ 196 <br />174 Material for cofferdams ...--_____________u_________u_______u_______ 196 <br /> <br />INTAKE TOWERS <br />175 General description _________u_______u_______u~__u_____hu_____ 199 <br />176 Geology of tower foundlltionLu______________u___________~_________ 199 <br /> <br />PENSTOCK AND OUTLET HEADER TUNNELS <br />177 General description _______h______UUU_h___________u_~_________ 201 <br />178 Geology ___________________________~____________________~_________ 202 <br /> <br />SPILLWAYS <br />179 General description h______________u__hu_____.._________U_____h 202 <br />180 Geology of the Arizona spillway site_______u______..____u__..._u_uu_ 203 <br />181 Geology of the Nevada spillway site_u____u___u__u___u__u_uu__ 208 <br /> <br />POWERHOUSE <br />182 General description __u__u___u_u__________________u____u____u 210 <br />183 Topography and geology of powerhouse site_uh________uu_______u__ 210 <br /> <br />OUTLET WORKS <br />184 General description u_____________________________u_______________ 212 <br />185 Geology of the canyon_w3.1l outlet sitesu____________u___________u___ 213 <br />186 Geology of the tunnel-pIllg outlet sitesuu__huu__U____u__u______ 214 <br />