The ongoing effort to restore Lake Delhi got a big boost Wednesday.
The U.S. Army Corps of Engineers approved a building permit for work to restore the dam at the northeast Iowa lake.
Construction on the first phase of the $16 to $17 million project could begin this spring.
The 9-mile-long lake on the Maquoketa River was drained when the dam collapsed during flooding in 2010.
The lake bed has been dry ever since.