A review of scientific literature finds data is lacking to confirm delayed mortality caused by the lower Snake River dams on fish listed under the Endangered Species Act, according to the Pacific Northwest Waterways Association. Delayed mortality is the death of fish in estuaries or the ocean because of the stress they experienced passing through the dams. Agricultural stakeholders want lawmakers to understand that “we don’t have enough information to make a decision” about dam breaching, said Heather Stebbings, executive director of the Pacific Northwest Waterways Association.