2023 South Dakota Codified Laws 31-4-139. U.S. Highway 16 Alternate from U.S. Highway 16 at Custer via Keystone to U.S. Highway 16

2022 South Dakota Codified Laws 31-4-139. U.S. Highway 16 Alternate from U.S. Highway 16 at Custer via Keystone to U.S. Highway 16

2021 South Dakota Codified Laws 31-4-139. U.S. Highway 16 Alternate from U.S. Highway 16 at Custer via Keystone to U.S. Highway 16

2019 South Dakota Codified Laws 31-4-139. U.S. Highway 16 Alternate from U.S. Highway 16 at Custer via Keystone toU.S. Highway 16

2018 South Dakota Codified Laws 31-4-139. U.S. Highway 16 Alternate from U.S. Highway 16 at Custer via Keystone to U.S. Highway 16

2016 South Dakota Codified Laws 31-4-139. U.S. Highway 16 Alternate from U.S. Highway 16 at Custer via Keystone toU.S. Highway 16

2014 South Dakota Codified Laws 31-4-139. U.S. Highway 16 Alternate from U.S. Highway 16 at Custer via Keystone toU.S. Highway 16

2010 South Dakota Laws 31-4-139 – U.S. Highway 16 Alternate from U.S. Highway 16 at Custer via Keystone to U.S. Highway 16