This is the first in a series of levee enhancements along the Sacramento River led by the U.S. Army Corps of Engineers Sacramento District.
Mark Boedtker is a civil engineer with Corps. He says the existing levees were built in the early 1900s and are due for improvements.
"They're mostly about 100 years old and the levee material a lot of it is old dredge material from the river. And so what we are construction is material that's better suited for levee construction and we're also constructing a cutoff wall within the levee itself."
Boedtker says that cutoff wall will be built in the center of the new levee to help prevent seepage.
The new levee will also be placed 250 feet behind the existing levee. Boedtker says that will widen the river channel to hold more water during a flood while preserving the wildlife habitat between the old levee and the river.
The project is expected to be completed in a year.