The modified fish ladders are working at the damaged Wanapum Dam, but wildlife officials still plan to catch and transport some salmon and steelhead around the structure in trucks.
In total, 61 fish that had been waiting in the pool below the dam passed safely through the modified ladder on the first day Tuesday.
The Yakima Herald-Republican reported Thursday that some migrating fish are also being trucked around the dam and released upriver to reach spawning grounds.
After a 65-foot-long fracture was discovered in one of the dam's concrete spillways in late February, the water level was drawn down by 26 feet to reduce pressure on the crack. The dam stabilized, but it left the fish ladders high and dry.