The U.S. Army Corps of Engineers have administered improvements to the fish ladder at Daguerre Point Dam in an effort to facilitate spawning for two endangered fish species that hatch eggs in the upper reaches of the Yuba's South Fork. The Corps has installed metal grates on the top of fish ladders for two principal reasons: To stop poaching and to prevent fish from jumping out of the fish ladder as they proceed upwards, said Doug Grothe, Englebright Lake Park Manager for the Corps."I think that a fish has missed the mark and jumped outside the ladder only once that …