Lake Tahoe filled almost to the brim after stormy winter

The Associated Press

5 years ago

In a March 5, 2018 file photo, sunlight shimmers off the snow and waters of Lake Tahoe in South ... — In a March 5, 2018 file photo, sunlight shimmers off the snow and waters of Lake Tahoe in South Lake Tahoe, Calif. Water stored at Lake Tahoe has nearly reached its legal limit after snowmelt from a stormy winter left behind enough to potentially last through up to three summers of drought. The lake has been within an inch of its maximum allowed surface elevation of 6,229.1 feet above sea level for more than three weeks and crept to within a half-inch this week. (AP Photo/Rich Pedroncelli, File)

FILE – This June 25, 2019 file photo shows cyclists on the Tahoe East Shore Trail near Glenbrook, Nev. Water stored at Lake Tahoe has nearly reached its legal limit after snowmelt from a stormy winter left behind enough to potentially last through up to three summers of drought. The lake has been within an inch of its maximum allowed surface elevation of 6,229.1 feet above sea level for more than three weeks and crept to within a half-inch this week. (Jason Bean/The Reno Gazette-Journal via AP, File)

RENO — Lake Tahoe is the fullest it’s been in nearly two decades.

Officials say the alpine lake on the California-Nevada line is approaching the legal limit after snowmelt from a stormy winter left enough water to potentially last through three summers of drought.

For three weeks, Tahoe has been within an inch of its maximum allowed surface elevation of 6,229.1 feet above sea level,

It crept to within a half-inch earlier this week.

Chad Blanchard, a federal water master in Reno responsible for managing the water, told the Reno Gazette Journal it’s the longest he’s seen the lake stay that high for so long.

“This is a rare year,” he said. “I’ve been doing this for 26 years, and we’ve had big (snow) years, but this one is unique as far as being up within an inch of being full and it’s just hanging there. … It’s a product of still having so much snow up there.”

Lake Tahoe, the second-deepest lake in the U.S. at about 1,645 feet, typically holds enough water to cover the entire state of California to a depth of 14 inches.

Only Oregon’s Crater Lake is deeper.

As winter snow continues to melt from mountain tops and into Tahoe, the rate of summertime surface evaporation is beginning to pick up.

Blanchard says the lake soon will reach a point of equilibrium when snowmelt slows and the rate of evaporation increases. Then, the lake level will begin to drop.

“What it means going forward is a good water supply for three years,” he said.

The legal limit of the lake plays a role in determining if, when and how much water is spilled into the Truckee River at a dam in Tahoe City, California.