None supplied. From introduction: The construction of a flood control dam on the Chena River near Fairbanks necessitated that fish passage be provided for king salmon, Oncorhynchus tshawytscha; chum salmon, O. keta, and Arctic grayling, Thymallus arcticus. The use of fish ladders by salmon is well known but no information is available on the use of fish ladders by grayling. The primary objective of this study was to determine whether or not Arctic grayling would accept and use and alaska Steeppass Model 'A' fish ladder. Further objectives included finding an optimal slope and discharge for passage of all migrating grayling. Other species of fish encountered were to be included in the tests as time permitted.