CONTENTS 



PAGE 



Acknowledgments 155 



Introduction 157 



Physiography of the Plateau 160 



Plateau ethnography 162 



The Umatilla 164 



TheSanpoil --- 165 



Ethnographic research 166 



The River Basin Surveys Program 169 



Excavations in the McNary Reservoir 171 



Site 35-UM-5 (Hat Creek) .._ 173 



Architecture 175 



Material culture — — - 176 



Economy 178 



Site35-UM-3 178 



Site 35-UM-7 (Cold Springs) 179 



Architecture 179 



Material culture -- 186 



Economy 190 



Further observations 191 



Site 35-UM-17 (Techumtas Island) 191 



Architecture 193 



Material culture 195 



Economy 197 



Site45-BN-53 -.. 197 



Architecture 198 



Material culture 198 



Economy 200 



Site 45-WW-6 (Wallula) 200 



Architecture 202 



Material culture — _ - 202 



Burial customs _ _ 208 



Economy 209 



Historical data 209 



Site 45-BN-3 (Berrian's Island) ._ 210 



Architecture 210 



Material culture 211 



Burial customs 215 



Economy — 217 



Site45-BN-6 217 



Architecture 217 



Material culture 220 



Burial customs 221 



Economy 221 



Historical data 222 



45-BN-55 (Sheep Island). -.. 222 



Culture change in the McNary region 223 



151 



