The Columbia River Gorge National Fish Hatchery Complex requires hazard tree removal and trimming services at the following National Fish Hatcheries, including Government residences and associated pro... The Columbia River Gorge National Fish Hatchery Complex requires hazard tree removal and trimming services at the following National Fish Hatcheries, including Government residences and associated property: -Little White Salmon National Fish Hatchery -Willard National Fish Hatchery -Carson National Fish Hatchery