A report compiled by a federal agency questions the need for two major dams on the Yuba River due to their harmful impacts on three distinct native fish populations. In the report, released last week, the National Marine Fisheries Service ordered the United States Army Corps of Engineers to do more to provide for better fish habitat on the South Fork of the Yuba River. The opinion said the operation and maintenance of DaGuerre Point Dam and Englebright Dam detrimentally impact the populations of three endangered species of fish - Spring-run Chinook Salmon, Central Valley Steelhead and Green Sturgeon.All three are on …