Tonight it's a milestone in the $16 million Lava Butte Project.  Highway 97 will be affected this evening and thru tomorrow morning as crews complete a major part of the project.  Drivers can expect up to 20 minute delays. Peter Murphy with ODOT says crews will work in frigid temperatures overnight to put in gigantic beams: “The beams are about 50 tons a piece, 136 feet long. So they are pretty good sized beams.  That will help make the deck; basic underlying structure that people will drive on." When the project is finished, the drive from Bend to Sunriver will be four lanes in both directions. $12 million of the $16 million project came from federal stimulus money. Murphy says the project created about 200 jobs.