The Lowell Creek Diversion Tunnel is a flood control project located in Seward, Alaska, United States.

It was the first flood control project completed by the United States Army Corps of Engineers in Alaska.

Beginning with the town's establishment in 1903, the fast-moving stream produced one to three severe floods each year until the tunnel was built in 1939.

[2] In 1927 the Alaska Railroad constructed a small diversion dam and flume to carry debris down Jefferson Street to drain into Resurrection Bay.

The project consisted of: Completed in 1940, this system withstood the 1964 Alaska earthquake, as well as severe floods in 1966, 1986, and 1995, which brought the water level within inches of cresting the dam.