Tuesday, October 17, 2006

Levee Maintenance

It does pile up and though it needs to be done on an ongoing basis, better late than never.

Let’s hope the repair work is done in time.

An excerpt.

Levee woes pile up
El Niño raises concern as crews rush to make critical repairs at more than 70 new Central Valley sites.
By Matt Weiser - Bee Staff Writer Published 12:00 am PDT Tuesday, October 17, 2006


State and federal officials have identified at least 71 more damaged levee sections throughout the Central Valley that could fail this winter, and in an unusual step they plan to undertake repairs lasting well into the worst of the rainy season.

Levee experts normally seek to complete repairs by Nov. 1, the official start of flood season, because working in winter adds risks and complications. Swelling rivers can put repair areas under water, and saturated levees may become unstable under heavy truck traffic.

But the 71 new sites have the potential to fail without attention, so repairs are considered urgent. Many protect populated areas, including Clarksburg, Isleton, Plumas Lake and Chico. Others protect vital roads and utilities.

"From a construction standpoint, it's going to be extremely challenging," said Mike Inamine, chief of levee repairs at the California Department of Water Resources. "In the event that we can't get to all of these sites, we're making provisions with the Army Corps and our own forces to get ready to fight floods at these critical sites."

Adding to the challenges, an El Niño weather pattern is in place this winter.

Forecasters predict a 33 percent chance for above-average rainfall south of Fresno. Normal winter conditions are predicted in Northern California, but that could change because the El Niño pattern is still strengthening, said Kelly Redmond, deputy director of Western Regional Climate Center, an arm of the National Weather Service.