photo 7-01. looking at protective - transportation.alberta.ca landslide… · photo 7-01. looking...

Client: Alberta Transportation Date: October 2017 File No.: 13351 Page 1 of 11 E File: H:\15\16\PH Geohazard Assessments\PH7 Daishowa Site 7& 8\2017\2017 PH7 Inspection Photos.doc

Photo 7-01. Looking at protective gabion wall along north side of channel near end of armouring.

Photo 7-02. Channel erosion and breach of armour (geotextile exposure) compromising the foundation of the protective gabion wall (32+290). Similar to the 2016 condition.

Client: Alberta Transportation Date: October 2017 File No.: 13351 Page 2 of 11 E File: H:\15\16\PH Geohazard Assessments\PH7 Daishowa Site 7& 8\2017\2017 PH7 Inspection Photos.doc

Photo 7-03. Looking down north channel from lower gabion drop structure (32+495).

Photo 7-04. Geotextile exposure and bank erosion at north side of lower gabion drop structure (32+495).

Client: Alberta Transportation Date: October 2017 File No.: 13351 Page 3 of 11 E File: H:\15\16\PH Geohazard Assessments\PH7 Daishowa Site 7& 8\2017\2017 PH7 Inspection Photos.doc

Photo 7-05. Upper gabion drop structure (32+540).

Photo 7-06. Torn gabion basket mesh at upper gabion drop structure (32+540)

Client: Alberta Transportation Date: October 2017 File No.: 13351 Page 4 of 11 E File: H:\15\16\PH Geohazard Assessments\PH7 Daishowa Site 7& 8\2017\2017 PH7 Inspection Photos.doc

Photo 7-07. Close-up of bank erosion and exposed geotextile on north side of channel. (32+660).

Photo 7-08. Bank erosion and breach of armour on south side of north channel (32+660).

Client: Alberta Transportation Date: October 2017 File No.: 13351 Page 5 of 11 E File: H:\15\16\PH Geohazard Assessments\PH7 Daishowa Site 7& 8\2017\2017 PH7 Inspection Photos.doc

Photo 7-09. North channel inlet and small beaver dam. Note vegetation and willow growth (32+855).

Photo 7-10. Looking up the ditch slope (east) at end of erosion control section (32+900).

Client: Alberta Transportation Date: October 2017 File No.: 13351 Page 6 of 11 E File: H:\15\16\PH Geohazard Assessments\PH7 Daishowa Site 7& 8\2017\2017 PH7 Inspection Photos.doc

Photo 7-11. Looking down the ditch slope (west) at the pillow concrete erosion control section (32+900).

Photo 7-12. Looking up the ditch slope (east) at the cabled concrete erosion control section (32+785).

Client: Alberta Transportation Date: October 2017 File No.: 13351 Page 7 of 11 E File: H:\15\16\PH Geohazard Assessments\PH7 Daishowa Site 7& 8\2017\2017 PH7 Inspection Photos.doc

Photo 7-13. Looking upslope (east) at weathered and broken interlocked concrete blocks (100 mm thick Lafarge paving stones) (32+660).

Photo 7-14. Looking down the ditch slope (west) at the 300 mm thick gabion mattress erosion control section (32+565). Section had vegetation growth and was performing

well.

Client: Alberta Transportation Date: October 2017 File No.: 13351 Page 8 of 11 E File: H:\15\16\PH Geohazard Assessments\PH7 Daishowa Site 7& 8\2017\2017 PH7 Inspection Photos.doc

Photo 7-15. Looking down the ditch slope (west) at the geocell filled with gravel (32+360). Section had vegetation growth and was performing

well.

Photo 7-16. Looking upslope (east) at the Coletanche geomembrane erosion control section (32+340).

Client: Alberta Transportation Date: October 2017 File No.: 13351 Page 9 of 11 E File: H:\15\16\PH Geohazard Assessments\PH7 Daishowa Site 7& 8\2017\2017 PH7 Inspection Photos.doc

Photo 7-17. Looking east towards 300 m diameter channel sock erosion control section (32+245). Section had good vegetation growth.

Photo 7-18. Looking east towards rolled erosion control product (turf reinforced matting)

section.

Client: Alberta Transportation Date: October 2017 File No.: 13351 Page 10 of 11 E File: H:\15\16\PH Geohazard Assessments\PH7 Daishowa Site 7& 8\2017\2017 PH7 Inspection Photos.doc

Photo 7-19. Culvert inlet at west end of erosion control section (32+050).

Photo 7-20. Bump in road asphalt from possible subgrade swelling (32+050).

Client: Alberta Transportation Date: October 2017 File No.: 13351 Page 11 of 11 E File: H:\15\16\PH Geohazard Assessments\PH7 Daishowa Site 7& 8\2017\2017 PH7 Inspection Photos.doc

Photo 7-21. Rill erosion on north road embankment (32+150).

Photo 7-22. Rill erosion and minor gullying on north road embankment (32+300).