TRUCKEE, Calif. and#8212; Caltrans is winding down its busy summer of construction on Interstate 80.

Every year in the Truckee-Tahoe region, earth-moving construction must be wrapped up and buttoned down by Oct. 15 or thereabouts to prepare for winter storms and subsequent run off, and area roadwork is no exception.

and#8220;The majority of the work will go right up until the winter hold,and#8221; said Rochelle Jenkins, spokeswoman for Caltrans. and#8220;Then we'll start up again sometime next spring depending on how late our snow is.and#8221;

Four of the major I-80 projects should be complete before winter, she said and#8212; the Goldrun project that has detoured trucks to Nevada City; Donner Two on the west side of Donner Summit; Nyak and; Rainbow Road.

and#8220;Everybody has been really good. They're on schedule and there have been no major significant delays that they haven't been able to overcome,and#8221; Jenkins said.

Work on the Truckee side of Donner Summit and down the Truckee River Canyon to the state line will continue next year, but the roads should be wide-open through the winter.

and#8220;It will look like its done except for the construction signs and#8212; there will be four lanes and everything will be snow prepped,and#8221; Jenkins said.

The last project on I-80 will start next summer from Colfax to Nyak, costing $167 million, she said, adding that all work will be done by fall 2013.

and#8220;This is all non-stimulus money. This is California taking care of California and#8212; (a) half-billion worth of work employing about 9,000 people,and#8221; Jenkins said.

Drainage improvement work on highways 89 and 267, from Truckee to Tahoe, should also finish around Oct. 15, before starting up again next summer.