The Dalton is closed at MP 335 due to flooding, it has been closed for days and the truck traffic is backed up in both directions (update: 2' water flowing over in places). You may want to postpone travel up that far. The Alaska Highway also has a wildfire that jumped the road at MP 1234. I'll post the AKDOT web link for all Alaskan road condintions for you.
http://511.alaska.gov/alaska511/mappingcomponent/index
Dalton Highway from Milepost 335 to Milepost 412
Closures: Road closure
Warnings: Travel is not advised
Obstructions:- Water hazard - Water flowing across road .
Notes: THE DALTON HIGHWAY IS CURRENLY CLOSED FROM JUST NORTH OF HAPPY VALLEY MP 335.5 THROUGH APPROXIMATELY MP 412 DUE TO WASHOUTS AND WATER ON THE ROADWAY. WE CURRENLY EXPECT THE ROAD TO BE CLOSED FOR 4-7 DAYS. THIS ADVISORY WILL REMAIN IN EFFECT UNTIL FURTHER NOTICE
Alaska Highway at Milepost 1234
Closures:- Road open to traffic - Expect delays.
Warnings:- Be prepared to stop - Clearing in progress - Emergency vehicles on road - Use caution when traveling through this area - Warning - Thank you for your patience .
Obstructions:Flames next to road
Notes:A wildfire has jumped the Alaska Highway on Wednesday May 20th. Fire crews are on scene. Alaska DOT&PF is guiding traffic through the area with a pilot car to keep the road open. A staging area was established at milepost 1237.5. For more information go to www.akfireinfo.com.