Medicine Bow Nordic Ski Patrol
Patrol Log: Saturday, January 23, 1999: K. Chamberlain
Ski tour:
Green Rocks trailhead north to open meadow ENE of St. Alban's
chapel with 5 patrollers and 4 candidates. Ski and tobaggon
test on slope followed by mock rescue exercise at Little Brooklyn
Lake. Skied back to Green Rocks by Brooklyn Lk road and
unplowed 130. Eight inches of fresh snow on a good pack,
excellent touring and turning.
Snow pit:
Location: NW1/4 SE1/4 Sec 11 T16N R79W, above small lake
Elevation: ~10440'
Orientation: E facing open slope, leeward with thick forest above
Dip: 15 °
Depth: 6'6" (200 cm)
Description from top down: Temperatures: OA 28 °F
0-18cm: fresh powder, fist indentation
18-41cm: packed powder, fist 20cm 22 °F
41-145cm: ET slab, well consolidated 40cm 23 °F
increasing hardness with depth, 2 finger 60cm 25 °F
at top, pencil at bottom, 0.5mm 80cm 26 °F
interlocked crystals 100cm 28 °F
120cm 29 °F
140cm 31 °F
145-200cm: TG depth hoar, 1-1.5mm facetted crystals 160cm 31 °F
at top to 2-2.5mm well-formed trapezoids 180cm 32 °F
at bottom. Fairly well consolidated 200cm 32 °F
however, with 3 finger hardness at top
and 2 finger at bottom
Shovel shear test: failed at both 18 and 41 cm in loose non-slab style
Modified shear test using skis: failed at bottom of cut trough due to leverage, results
interpreted to indicate ET and TG portions well-linked with good cohesion and no internal
weaknesses or shear planes.
Summary: slope is relatively safe and prime for good skiing.
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Page last modified January 29, 1999
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