Observation: Hatcher Pass

Location: The Independence Mill below 900 ft Portal / Tramway

Route & General Observations

Toured around the Gold Chord area, the old Independence Mill, and water tunnel, below 900 ft portal/tramway.

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?No
Collapsing (Whumphing)?Yes
Cracking (Shooting cracks)?No
Observer Comments

Two large whumps, one as we were exiting back down our skin track.

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.

Light winds
Light snow in the morning, no precipitation in the afternoon
Temperatures in the 20s F

Snow surface

1" of new low density snow over settled powder. On NE aspects the 1" of new snow was on top of a 1" wind crust.


We dug pits in 3 locations.

Location 1: 3626' 20 degree slope, E aspect.
- Pit 1: HS= 90 cm. CT20 SC down 76 cm on 2 mm basal facets. ECTX x 2 but this could have been influenced by a small willow in the basal facets.
- Pit 2: HS=100 cm. CT22 SC and ECTP28 down 95 cm in 2 mm basal facets.
- Persistent weak layers found: facets above melt freeze crust and 2mm basal facets below melt freeze crust. No buried surface hoar (BSH) found.

Location 2: 3734'. NE Aspect. 26 degree slope.
- Pit 1: HS=90 cm. CT23 SC down 65 cm on 2.5 mm basal facets. ECTX.
- Pit 2: HS=105 cm. CT18 SC and ECTP21 down 90 cm on 2.5 mm basal facets. ECTP13 down 80 cm on 2.5mm facets right under the MFC. ECTP 31 & 32 (outside of test parameters) down 65-70 cm on 9mm BSH and facets right above the MFC.
-Persistent weak layers found: 2.5 mm basal facets and 9mm BSH and facets right above the MFC.

Location 3: 3734', S aspect, 26 degree slope.
- Pit 1: CT14 SP down 45 cm on 3 mm basal facets. CTN. ECTX.

Photos & Video
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