GP-24Page 1 of 8
2008-1002C August 2008SH 725
Hamelin Creek Slide
File No: 2008-1002Ca12cFile No: 2008-1002Ca12c
Note: Photos taken on June 2008Note: Photos taken on June 2008
Photo 1a
Photo 1Looking South (towards Hwy 49) at upstream portion of this creek. The view is from north valley slope - Two watercourses flowing from upstream (Hamelin Creek from right of photo)(Tributary Creek) at centre of photo) to confluence at inlet of the arch culvert- Creek flows from right to left of photo- Settlement of fill embankment at culvert crossing location. Sagging of guardrail
Looking South (towards Hwy 49) from north valley slope- Close-up view of roadway settlement caused by lateral spreading and internal settlement of fill- Lateral movement of guardrail indicative of lateral spreading movement of fill
Culvert InletCulvert Inlet
Hamelin Creek (Upstream Stretch)Hamelin Creek (Upstream Stretch)
GP-24Page 2 of 8
2008-1002C August 2008SH 725
Hamelin Creek Slide
File No: 2008-1002Ca12cFile No: 2008-1002Ca12c
Note: Photos taken on June 2008Note: Photos taken on June 2008
Photo 2a
Photo 2
Photo 2b
Looking South (towards Hwy 49)- Another close-up view of roadway settlement
Looking South (towards Hwy 49)- Tension cracking of pavement at south edge of fill approach juncture- Indicative of lateral spreading movement of fill in addition to settlement
- Transverse cracking of pavement at edge of fill approach juncture
GP-24Page 3 of 8
2008-1002C August 2008SH 725
Hamelin Creek Slide
File No: 2008-1002Ca12cFile No: 2008-1002Ca12c
Note: Photos taken on June 2008Note: Photos taken on June 2008
Photo 3a
Photo 3
Photo 3b
Looking north towards highway and towards upstream of Hamelin Creek - Tributary creek flowing (from left bottom of photo) to confluence with Hamelin Creek to flow (turn 90 degree) to flow (left to right) into the arch culvert - Toe slide (under-scour fill by tributary creek) behind headwall at culvert inlet- Slumping side at NW corner of approach fill
Looking north towards highway from culvert inlet area - Slumping side at NW corner of approach fill
Slumping side at NW corner of approach fill- Closed-up view
NW SlumpNW SlumpNW SlumpNW Slump
Hamelin CreekHamelin Creek
u arye
Tribt
Crek
u arye
Tribt
Crek
GP-24Page 4 of 8
2008-1002C August 2008SH 725
Hamelin Creek Slide
File No: 2008-1002Ca12cFile No: 2008-1002Ca12c
Note: Photos taken on June 2008Note: Photos taken on June 2008
Photo 4a
Photo 3
Photo 4cPhoto 4b
Looking at curvature inlet of culvert from upstream bank of Hamelin Creek0- Hamelin Creek (bottom right of photo) flow to enter culvert through a 90 turn
- Erosion of bank at upstream area and sliding of bank slope adjacent to riprap area. The bank sliding area require riprap protection. The bank area to be considered for riprap
nd protection may extend to past the 2 bend from the existent riprap section.
Looking towards inlet of culvert from upstream bank- From further upstream- Natural channel at about 80 m-100 m upstream for inlet
Looking towards inlet of culvert from upstream bank- From a further upstream- Bouldery gravel channel bedding indicative of more flow energy for stone transport and more vigorous channel degradation process
- From a more further upstream- Small size gravel channel bedding indicative of less flow energy for stone transport and less vigorous channel degradation process
kBan SlumpingkBan Slumping
Ba k Slump ng needs
niiprap Protection
R
Ba k Slump ng needs
niiprap Protection
R
GP-24Page 5 of 8
2008-1002C August 2008SH 725
Hamelin Creek Slide
File No: 2008-1002Ca12cFile No: 2008-1002Ca12c
Note: Photos taken on June 2008Note: Photos taken on June 2008
Photo 5b
Photo 5
Photo 5c
Photo 5aLooking upstream of Hamelin Creek from inlet of culvert
0- Hamelin Creek (left of photo) flow to enter culvert (right of photo) through a 90 turn- Scour bank of fill slope (just upstream of riprap bank adjacent to inlet)- A meander bend of channel bank at far end of photo
Looking upstream of Hamelinst- A 1 meander bend of channel at far end of photo
- It maybe advisable to install riprap for erosion protection to cover this meander bend of channel
Looking upstream of Hamelinst- Towards further upstream beyond the 1 meander bend
- Natural channel bedding
Looking upstream of Hamelin- Towards a further upstream- Natural channel bedding
GP-24Page 6 of 8
2008-1002C August 2008SH 725
Hamelin Creek Slide
File No: 2008-1002Ca12cFile No: 2008-1002Ca12c
Note: Photos taken on June 2008Note: Photos taken on June 2008
Photo 6b
Photo 6
Photo 7
Photo 6aLooking at culvert inlet from Tributary Creek- Slumping of natural slope bank opposite to culvert inlet
Looking upstream at Tributary Creek- Riprap lining of channel has shifted and channel has eroded into nature soil at far bank of natural slope- Culvert wingwall at left of photo
Looking upstream at Tributary Creek- Riprap lining of channel has shifted and channel has eroded into nature soil at far bank of natural slope- Culvert wingwall at left of photo- This vertical degradation may be causal to sliding at back of curvature wingwall at culvert entrance
Looking downstream into culvert- Water level inside culvert was apparently higher from last annual inspection. Obviously, siltation buildup from culvert floor has raised water level inside culvert
Hamelin CreekHamelin Creek
GP-24Page 7 of 8
2008-1002C August 2008SH 725
Hamelin Creek Slide
File No: 2008-1002Ca12cFile No: 2008-1002Ca12c
Note: Photos taken on June 2008Note: Photos taken on June 2008
Photo 8
Photo 9
Looking north at Culvert inlet- Slide at back of wingwall at entry of Tributary Creekt
Looking from roadway at downstream channel of culvert exit - A straight reconstructed channel- A bank slide at north side (left of photo) apparently caused by ditch water outfall from a stilling basin at top of bank
e
Tributary Creke
Tributary Crek
SlideSlide
Slide at Bank ofHead Wall
Slide at Bank ofHead Wall
GP-24Page 8 of 8
2008-1002C August 2008SH 725
Hamelin Creek Slide
File No: 2008-1002Ca12cFile No: 2008-1002Ca12c
Note: Photos taken on June 2008Note: Photos taken on June 2008
Photo 11a Photo 11b
Photo 10 Photo 11Looking north from centre of fill just above culvert location - Slight slanting of pavement toward south (downstream) (right of photo). Apparently, there is more settlement and/or lateral spreading toward downstream- Dipping of pavement toward south (downstream) (right of photo) at patched area is apparent at centre area of fill
Looking south from centre of fill just above culvert location- Two back slope slides at culslopes at far end of roadway (just beyond and into photo)- Dipping of pavement toward south (downstream) (left of photo) at patched area is apparent at centre area of fill
South approach at top of valley slope- Backslope slide at south side
Backslope slide at south side- Backslope slide at north side
SagSag