SHOP SLIDE Photo 1. Looking south at cracking across the footpath - - PDF document

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SHOP SLIDE Photo 1. Looking south at cracking across the footpath - - PDF document

Oct 09, 2023 194 likes •317 views

SHOP SLIDE Photo 1. Looking south at cracking across the footpath at the end of the Hwy 2 EB to Hwy 684 SB off ramp at the 99 Ave. intersection. Additional movement since the June 9, 2014 site visit. Photo 2. Looking south at seepage

slide-1
SLIDE 1

Client: Alberta Transportation Date: September 10, 2014 File No.: 15-16-305 Page 1 of 12 E File: \\H\15\16-305 2014 PH9 August 12 Call Out Photos

SHOP SLIDE Photo 1. Looking south at cracking across the footpath at the end of the Hwy 2 EB to Hwy 684 SB

  • ff ramp at the 99
  • Ave. intersection.

Additional movement since the June 9, 2014 site visit. Photo 2. Looking south at seepage (oxidized area) through the Hwy 2 WB to Hwy 684 SB offramp (99 Avenue intersection). Water is flowing more rapidly than

  • n June 9, 2014.
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SLIDE 2

Client: Alberta Transportation Date: September 10, 2014 File No.: 15-16-305 Page 2 of 12 E File: \\H\15\16-305 2014 PH9 August 12 Call Out Photos

Photo 3. Looking southwest from northeast side of Hwy 684/99 Avenue intersection at

  • xidised water

flow emanating from the gravel

  • seems. The use of

the geomebrane sheets appears to have temporarily halted the backscarp/scour retrogression where it has been

  • placed. No

significant change since June 9, 2014. Photo 4. Looking northwest from end of the geomembrane sheets below the area offloaded by the Town at backscarp and the scour further

  • downslope. Both

the scour and retrogression have worsened since June 9, 2014.

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SLIDE 3

Client: Alberta Transportation Date: September 10, 2014 File No.: 15-16-305 Page 3 of 12 E File: \\H\15\16-305 2014 PH9 August 12 Call Out Photos

Photo 5. Looking south towards the northeast side of the Hwy 2 EB/Hwy 684 SB off ramp

  • embankment. Wet

zones, indicative

  • f on-going

seepage, were noted at several locations along the base of and within the backscarp. Photo 6. Looking northwest from south of the pipe racks. Dark zones in the Hwy 2 offramp embankment (left) are indicative of water seepage. Backscarp has now retrogressed beyond the guardrail posts 0.6 m into the paved shoulder.

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SLIDE 4

Client: Alberta Transportation Date: September 10, 2014 File No.: 15-16-305 Page 4 of 12 E File: \\H\15\16-305 2014 PH9 August 12 Call Out Photos

Photo 7. Looking northwest at the 800 mm diameter pipe. The piperack support is pushing into the protective sheeting, which is indicative of downslope movement (to the right). Photo 8. Looking east along the pipe rack at the 400 mm diameter pipe, which is lifting out

  • f the roller seats

and bending upwards due to downslope movement.

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SLIDE 5

Client: Alberta Transportation Date: September 10, 2014 File No.: 15-16-305 Page 5 of 12 E File: \\H\15\16-305 2014 PH9 August 12 Call Out Photos

Photo 9. Looking southwest from the base of the piperacks. The smaller 400 mm diameter pipe is clearly under stress and is bending out of the piperack roller seats due to downslope movement. Photo 10. Looking northwest along culvert at the 99 Avenue intersection. Precipitation event

  • f August 2, 2014

had caused the ditch water flow to rise above the 99 Avenue road

  • structure. The

ditch has been severely eroded with scour formed to the side of the rip rap lining. Several rip rap rocks were dislodge and transported into the culvert pipe.

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SLIDE 6

Client: Alberta Transportation Date: September 10, 2014 File No.: 15-16-305 Page 6 of 12 E File: \\H\15\16-305 2014 PH9 August 12 Call Out Photos

Photo 11. Looking southeast along culvert centerline at the 99 Avenue

  • intersection. Water

is permeating upwards through cracks in the asphalt pavement surface. Photo 12. Looking southeast along culvert at the 99 Avenue intersection. Culvert outlet clay plug and rip rap protection have has been compromised, exposing the culvert pipe. Extensive ditch bottom erosion and debris transported downslope of the

  • utlet.
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SLIDE 7

Client: Alberta Transportation Date: September 10, 2014 File No.: 15-16-305 Page 7 of 12 E File: \\H\15\16-305 2014 PH9 August 12 Call Out Photos

Photo 13. Looking southeast from above the pipe racks at the backscarp retrogression, which is now at 0.6 m into the roadway shoulder. Photo 14. Looking south at drop roadway above the

  • piperacks. Bow is

now visible along the white line and is worse than on June 9, 2014.

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SLIDE 8

Client: Alberta Transportation Date: September 10, 2014 File No.: 15-16-305 Page 8 of 12 E File: \\H\15\16-305 2014 PH9 August 12 Call Out Photos

Photo 15. Looking south at drop roadway above the piperacks. Cracking in asphalt is worse than on June 9, 2014. Photo 16. Looking northwest along NBL of the Hwy 2 offramp. Dips pavement at yellow noticeable near median.

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SLIDE 9

Client: Alberta Transportation Date: September 10, 2014 File No.: 15-16-305 Page 9 of 12 E File: \\H\15\16-305 2014 PH9 August 12 Call Out Photos

Photo 17. Looking north across the road at the south end of the median island. Note the dip in the road at the scarp for the lower slide bowl. Photo 18. Looking west across Hwy 2 EB/Hwy 684 SB

  • ff-ramp. Dips in

pavement are now discernable in in previously

  • bserved cracked

areas.

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SLIDE 10

Client: Alberta Transportation Date: September 10, 2014 File No.: 15-16-305 Page 10 of 12 E File: \\H\15\16-305 2014 PH9 August 12 Call Out Photos

Photo 19. Looking east across Hwy 2 EB/Hwy 684 SB

  • ff-ramp at new

scour gully formed during the August 2, 2014 precipitation event

  • n the downslope

side of the

  • embankment. (The

water concentrated and

  • verflowed over

the area of the dip in the pavement.) Photo 20. Looking west across Hwy 2 EB/Hwy 684 SB

  • ff-ramp at new

gully formed during August 2, 2014 precipitation

  • n downslope side
  • f embankment.
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SLIDE 11

Client: Alberta Transportation Date: September 10, 2014 File No.: 15-16-305 Page 11 of 12 E File: \\H\15\16-305 2014 PH9 August 12 Call Out Photos

Photo 21. Looking northwest from south end of the Shop landslide along Hwy 2 EB/Hwy 684 SB

  • ff-ramp. Dips in

pavement are now discernable in in previously

  • bserved cracked

areas. Photo 22. Looking north along the Hwy 2 EB/Hwy 684 SB

  • fframp at the

upper slide backscarp. Noticeable dip in the road surface.

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SLIDE 12

Client: Alberta Transportation Date: September 10, 2014 File No.: 15-16-305 Page 12 of 12 E File: \\H\15\16-305 2014 PH9 August 12 Call Out Photos

Photo 23. Looking southeast across Hwy 2 EB/Hwy 684 SB

  • ff ramp at dip in

pavement at south end of the larger landslide backscarp crossing the roadway. Photo 24. Looking northwest along scarp of landslide along treeline at the crest of the slope above the CNR right-of-way, near piezometer SP10-9. The

  • verall landslide

feature block drop at backscarp is now at about 3 m and the backscarp height is at about 1.7 m.