2024 16 USC 544 – Columbia River Gorge National Scenic Area; definitions

2023 16 USC 544 – Columbia River Gorge National Scenic Area; definitions

2022 16 USC 544 – Columbia River Gorge National Scenic Area; definitions

2021 16 USC 544 – Columbia River Gorge National Scenic Area; definitions

2020 16 USC 544 – Columbia River Gorge National Scenic Area; definitions

2018 16 USC 544 – Columbia River Gorge National Scenic Area; definitions

2017 16 USC 544 – Columbia River Gorge National Scenic Area; definitions

2015 16 USC 544 – Columbia River Gorge National Scenic Area; definitions

2014 16 USC 544 – Columbia River Gorge National Scenic Area; definitions

2013 16 USC 544 – Columbia River Gorge National Scenic Area; definitions

2012 16 USC 544 – Columbia River Gorge National Scenic Area; definitions

2010 16 USC 544 – Columbia River Gorge National Scenic Area; definitions