A flight crew was advised that because the CDV runway was being plowed they had to discontinue the ILS 27 approach. They did not begin the missed approach procedure until directed by ATC.

Narrative

As we were approaching the Final Approach Fix (FAF) (GIPRE) during the ILS 27; we were informed that the runway plowing/sweeping process was not complete. After a brief crew discussion; we agreed that a course reversal at the FAF followed by flying the depicted procedure turn would allow the ground crew sufficient time to clear the runway. As we changed frequency to Anchorage Center to state our intentions the Controller directed us to climb immediately to 6;000. We were climbing from 3;300 to 3;600 per the approach chart and flying heading 180. We complied with his instructions. We stated that we were ready to start the approach and were then cleared direct to GCR and a normal approach and landing followed. Since we were informed that runway would not be available for landing as we approached the FAF; it was very difficult to coordinate our intentions to Anchorage Center in a timely fashion. In retrospect; flying the published missed approach would have been more desirable; followed by communicating our intentions to Anchorage Center.