photo 1 major slide- looking south upgrade (from end of ... landslide… · 2010 slide tour...

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2010 Slide Tour AssessmentSH 666:02, W. Of Jct. Hwy 40 at Wapiti River Bridge, Major Slide

File No: 2008_1002a21c_Photopages_GP 16a_November 19_2010File No: 2008_1002a21c_Photopages_GP 16a_November 19_2010

Note: Photos taken on May 2010Note: Photos taken on May 2010

Photo 1

November 20102008-1002

Major Slide- Looking south upgrade (from end of Minor Slide at downgrade side)? Backslope sliding of overburden soils? Sideslope (river valley slope) deep seated movements (right of photo)

(i) Sideslope Deep-Seated Sliding(i) Sideslope Deep-Seated Sliding(ii) Backslope Overburden Movements(ii) Backslope Overburden Movements

GP 16a of 5

Photo 2a



Photo 2

2008-1002

Major Slide - Looking north downgrade from a top bench of backslope? At upper areas of backslope, the slumping scarps of overburden soils starting to deteriorate? A mass of soils was once off-loaded (around 1998)to form this top bench ? At roadway pavement, an encirclement of a headscarp from deep seated movement of sideslope (valley slope) persisted to reflect back to subside the pavement.

Looking south upgrade from a top bench of backslope? Another view of (i) backslope slumpings and (ii) pavement cracking subsidence from sideslope (valley slope) movements


November 2010

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Photo 3

2008-1002

Photo 3a

Photo 3b Photo 3c

Backslope Overburden movements ? Closed ups of cracks and scarps around top bench areas





November 2010

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2008-1002

Photo 4

Photo 4a Photo 5

Panorama view looking west from backslope down valley slope and towards river? Movement of valley slide toward river (away from photo)? Whole escarpment width of valley (affecting about 300m-400m of highway pavement) invoked subsidence of grounds to require patching of pavement over past 20-30 yrs.? A pinching retrogression of headscarp (A) has reflected into the patched pavement area of previous subsidence cracking distress. This valley slope entailed deep seated (20m depth range) sliding movements.

A pinch retrogression of headscarp (A) from sideslope (valley slope) sliding persisting? About 80m width of such headscarp cause some cracking subsidence of pavement

A pinch of headscarp (A) from sideslope (valley slope) sliding persisting ? A view from pavement elevation on crack encirclement? Repeated pavement patching renders a very steep sideslope along guardrail (ACP cummulating thickness in 1 m range)

Lower SlideLower Slide

HeadscarpPinch (A)

HeadscarpPinch (A)


November 2010

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2008-1002

Photo 5b

Photo 5d Photo 5e

Photo 5a Photo 5cHeadscarp crack (A) distress on pavement - Looking downgrade (south)? Centre portion of crack? South (downgrade) flank of crack

Headscarp crack (A) distress on pavement - Looking downgrade (south)? Centre portion of crack? South (downgrade) flank of crack

Headscarp crack (A) distress on pavement - Looking downgrade (south)? Centre portion of crack? South (downgrade) flank of crack

Headscarp crack (A) distress on pavement - Looking uprade (north)? Centre portion of crack? North (upgrade) flank of crack

Headscarp crack (A) distress on pavement - Looking uprade (north)? Centre portion of crack? North (upgrade) flank of crack


November 2010

photo 1 major slide- looking south upgrade (from end of ... landslide… · 2010 slide tour...

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