Small transport has ground conflict with snow plows plowing the landing runway.

Attributes
ACN	167130
Time
Date	199012
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : hdn
State Reference	CO
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Transport
Flight Phase	descent : approach landing other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 50 flight time total : 3600 flight time type : 300
ASRS Report	167130
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : atp
Events
Anomaly	conflict : ground critical non adherence : published procedure non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 50
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
Airport	procedure or policy : unspecified
Publication	Unspecified

Narrative:

We were IFR with ZDV en route to hdn when we heard the controller ask an air carrier if it wanted to shoot another approach into hdn after missing the first. His reply was negative. We were asked if we wanted to shoot the approach and replied in the affirmative. (WX was reported to be above minimums with poor braking action). We began attempting to contact hdn unicom on 122.8 but got no response. We were cleared for the approach and released to unicom. We continued to transmit to hayden unicom with no reply as we flew the approach. The sic called 'approach lights continue' at approximately 300' AGL and we landed in a snow shower. There was 3 snow plows on the runway (off to the left side) when we landed. Callback conversation with reporter revealed the following information. Plows were not seen until after landing and were far enough to left that no evasive action was needed to miss them. Although calls were made, contact was not established with unicom until during landing roll. A meeting with FBO manager and airport manager indicated that the plows operate whenever needed and they clear the runway when contact established with inbound aircraft. No NOTAMS were issued and ATC was not advised about runway plowing.

Original NASA ASRS Text

Title: SMT HAS GND CONFLICT WITH SNOW PLOWS PLOWING THE LNDG RWY.

Narrative: WE WERE IFR WITH ZDV ENRTE TO HDN WHEN WE HEARD THE CTLR ASK AN ACR IF IT WANTED TO SHOOT ANOTHER APCH INTO HDN AFTER MISSING THE FIRST. HIS REPLY WAS NEGATIVE. WE WERE ASKED IF WE WANTED TO SHOOT THE APCH AND REPLIED IN THE AFFIRMATIVE. (WX WAS RPTED TO BE ABOVE MINIMUMS WITH POOR BRAKING ACTION). WE BEGAN ATTEMPTING TO CONTACT HDN UNICOM ON 122.8 BUT GOT NO RESPONSE. WE WERE CLRED FOR THE APCH AND RELEASED TO UNICOM. WE CONTINUED TO XMIT TO HAYDEN UNICOM WITH NO REPLY AS WE FLEW THE APCH. THE SIC CALLED 'APCH LIGHTS CONTINUE' AT APPROX 300' AGL AND WE LANDED IN A SNOW SHOWER. THERE WAS 3 SNOW PLOWS ON THE RWY (OFF TO THE L SIDE) WHEN WE LANDED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO. PLOWS WERE NOT SEEN UNTIL AFTER LNDG AND WERE FAR ENOUGH TO L THAT NO EVASIVE ACTION WAS NEEDED TO MISS THEM. ALTHOUGH CALLS WERE MADE, CONTACT WAS NOT ESTABLISHED WITH UNICOM UNTIL DURING LNDG ROLL. A MEETING WITH FBO MGR AND ARPT MGR INDICATED THAT THE PLOWS OPERATE WHENEVER NEEDED AND THEY CLR THE RWY WHEN CONTACT ESTABLISHED WITH INBND ACFT. NO NOTAMS WERE ISSUED AND ATC WAS NOT ADVISED ABOUT RWY PLOWING.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.