The U.S. Army Corps of Engineers is leveling sand dunes at Holland State Park on Lake Michigan to protect a channel.
The dunes are on the north side of the channel connecting Lake Macatawa to Lake Michigan.
Army Corps spokesman Tom O'Bryan says the sand on the north side of the channel is putting pressure on a sea wall and says engineers are afraid the structure could collapse. Crews will spread the 18,000 cubic yards of sand along the shore.
Work began Monday and will take about 3 weeks. The site is in Ottawa County's Park Township.
O'Bryan says the work will cost $182,000 and is funded from last year's federal budget, so it's unaffected by the U.S. government shutdown.