I work road construction on interstate 80 in Nevada approx.. 25 miles east of Battle Mt., NV. and 7 miles north of Beowawe NV. There were three white or silver spheres in the sky. The bright ness faded in and out and could have been the reflection of the sun. The craft did not move for approx. four hours. I used the compass on me phone for a direction and it was at 216+- degrees SSW from my location. I wonder If this is what also was seen in the salt lake area today. If it is, they were very high in elevation because salt lake city Utah is 240+ miles away. There was normal aircraft in the vicinity but showed no reaction to the objects. This could be due to the distance.