Flight crew reports ATC terrain warning and GPWS warning while descending visually into ase from ove...

Narrative:

We were commencing the roaring fork visual into ase via ruedi reservoir to runway 15 and circling to runway 33. I had set and selected 11;500 (published recommended altitude just north of ruedi reservoir). As we were coming up over ruedi reservoir we were descending through approximately 12;500 +/- when ATC stated they were receiving a low altitude alert and to verify terrain in sight. We had the terrain in sight and as we replied to ATC we simultaneously received a GPWS warning at which point I had disconnected the autopilot and stopped the descent showing approximately a 200 FPM climb initially; which cancelled the GPWS warning. Note: as we were descending towards 11;500; the vertical airspeed was approximately 2;000 - 2;500 FPM. That may have contributed to the GPWS warning (our vertical speed was too excessive at that point on the chart even though we were above the recommended altitude). If conducting the roaring fork visual via ruedi reservoir again; I would only commence it if high rates of descent were not needed to in order to get to recommended altitudes to set up for the final descent into ase. The other course of action would be to approach ase from the north via a more direct course via the localizer course so as to not fly below published altitudes if commencing a visual approach.

Original NASA ASRS Text

Title: Flight crew reports ATC terrain warning and GPWS warning while descending visually into ASE from over Ruedi Reservoir using the Roaring Fork Visual for guidance. The high descent rate was thought to have caused the GPWS warning.

Narrative: We were commencing the Roaring Fork Visual into ASE via Ruedi Reservoir to Runway 15 and circling to Runway 33. I had set and selected 11;500 (published recommended altitude just north of Ruedi Reservoir). As we were coming up over Ruedi Reservoir we were descending through approximately 12;500 +/- when ATC stated they were receiving a low altitude alert and to verify terrain in sight. We had the terrain in sight and as we replied to ATC we simultaneously received a GPWS warning at which point I had disconnected the autopilot and stopped the descent showing approximately a 200 FPM climb initially; which cancelled the GPWS warning. NOTE: As we were descending towards 11;500; the vertical airspeed was approximately 2;000 - 2;500 FPM. That may have contributed to the GPWS warning (our vertical speed was too excessive at that point on the chart even though we were above the recommended altitude). If conducting the Roaring Fork Visual via Ruedi Reservoir again; I would only commence it if high rates of descent were not needed to in order to get to recommended altitudes to set up for the final descent into ASE. The other course of action would be to approach ASE from the north via a more direct course via the localizer course so as to not fly below published altitudes if commencing a visual approach.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1191403
Time
Date	201407
Local Time Of Day	0601-1200
Place
Locale Reference	ASE.Airport
State Reference	CO
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Medium Transport High Wing 2 Turboprop Eng
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Other Roaring Fork Visual
Person 1
Function	Captain Pilot Flying
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Commercial
Events
Anomaly	No Specific Anomaly Occurred All Types

Flight crew reports ATC terrain warning and GPWS warning while descending visually into ase from over ruedi reservoir using the roaring fork visual for guidance. The high descent rate was thought to have caused the GPWS warning.