tw erosion control works area 1 & 2 area 1 · gabion failure exposing the bank scour pool in...
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. April 13, 20170 100 20050
Meters
Planned Stream Restoration Projects(1 S year horizon)
Sanitary Trunk Sewer
!( TRCA Erosion Control Structures
TW Erosion Control Works") 5 - 10 years
") 2018 - 2020
") completed
") unknown
TRCA Floodline
TRCA Floodplain
Hydro Line
Railway
Creeks
Taylor Creek ESA Boundary
Taylor Massey Sub-Watershed Study Area
Flood and StreamRestoration
Taylor Massy Creek Sub-WatershedMaster Plan Development
Area 1
Kep Map1
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Slumping gabionsexposing bridgesupport, scouringin channel at base
Crib wall (RB) largesand bar along LB
Concrete pad crossingflush with bed, waterflows across
Bottom layer ofgabions scrouedout at bridge and US
Gabion failureexposing the bankscour pool in channel
Gabion wall emptyat base
Perched outfall withconcrete pad forflow dissipation
Gabion failure scouredat base and pushed away from bank by flow from US
Failed gabionscreating mid-channebar, LB has exposed till in bank and bed
Slope instability large armoutstone protecting,some blocks failing, manhole potentially at risk
Gabions leaning, slumpingand scoured throughoutdownstream of the reach
Concrete pad crossingflush with bed, overlappingby flow
Lower level of gabionshas eroded away resultingin slumping of upperlevel exposing bridge support
Combined pipe exposedin bed from mid-channelto right bank
Beneath left part ofbridge gabions scouredat base first level isempty of material
Bridge currentlybeing replaced
Bank top has erodedback to edge of trail,gabions at base ofbank are entact
Small CSP partiallyeroded out of bank
Bank blown out, eroding,trail potentailly at risk
Loss of material near bridgedesk where it connects to trail
CSP discharging fromLB, crossing is coveredwith gravel material,possibly previously exposed
Gabions failedbank blown outacross from outfall
Bridge currentlybeing replaced
Outfall elevated with concretepad for dissipation, rip rapleading to channel. A large piped coming from the parkinglot lies on top of the outfall.
Pedestrian bridgeunder construction3 CSPs perched onDS side
Large area ofsand deposition
Bottom layer of gabionshas been scoured outlarge bar of gabion stone
Gabions slumpingbank slope failure
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Geomorphic and Infrastructure Issues
Source: Geomorphic and Habitat Systems Study, Parrish Engineering 2013
Area 1 & 2
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. April 13, 20170 100 20050
Meters
Planned Stream Restoration Projects(1 S year horizon)
Sanitary Trunk Sewer
!( TRCA Erosion Control Structures
!( Stormwater Management Facility
TW Erosion Control Works") 0 - 5 years
") 5 - 10 years
") 2018 - 2020
") completed
") unknown
TRCA Floodline
TRCA Floodplain
Hydro Line
Railway
Creeks
Taylor Creek ESA Boundary
Warden Woods ESA Boundary
Taylor Massey Sub-Watershed Study Area
Taylor Massy Creek Sub-WatershedMaster Plan Development
Area 2
Kep Map
Flood and StreamRestoration
Area 3 & 4
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. April 13, 20170 100 20050
Meters
Planned Stream Restoration Projects(1 S year horizon)
Sanitary Trunk Sewer
!( TRCA Erosion Control Structures
!( Stormwater Management Facility
TW Erosion Control Works") 0 - 5 years
") 5 - 10 years
") unknown
TRCA Floodline
TRCA Floodplain
Flood Vulnerable Area Clusters
Hydro Line
Railway
Creeks
Warden Woods ESA Boundary
Taylor Massey Sub-Watershed Study Area
Taylor Massy Creek Sub-WatershedMaster Plan Development
Area 3
Kep Map
Flood and StreamRestoration
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Corrugated steel retainingwall to protect outfalls
Slope eroding next toculvert
Culvert creating scourpool
Failed gabions andbank erosion
Rip-rap bank protection
Lateral bar and sanddeposition
Eroding bank throughoutfull extent of bendapproaching trail
Large lateral bar
Steel weir to protectsewer crossing;erosion along LBDS of weir
Large log/debris jam
Bank erosion andundercutting US andDS of outfall on RB
Undersized pedestrianbridge will need replacing
Outfall elevated approx.1m above bed, scour pool
Amourstone andconcrete retaining wall
Woody debris in channel
Scour pools at base ofoutfalls, dissipation structures old and decaying
Exposed sanitary sewer inchannel bed, concrete/urbandebris jams
Geomorphic and Infrastructure Issues
Failed gabions, debris jams,bend is severely eroded
Pedestrian bridge, undersized both footingsexposed, right bankmore severely
Bank erosion
Manhole casing exposedat edge of channel bed
On downstream sideof bridge, slope is eroding on either sideexposing sides of bridge
Manhole casing exposedon channel bank
Bank erosion
Severely eroding valleywal contact
Manhole casing exposedat base of bank
Eroding valley wallcontact, woody debrisjam in channel
Eroding bank, scourpool, lateral sand bar
Bank eroding, concreterubble in channel, woodydebris
Manhole casing exposedat top of bank
Gabion wall (both banks)undermined
Localized bank failure
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Source: Geomorphic and Habitat Systems Study, Parrish Engineering 2013
Area 5 & 6
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. April 13, 20170 100 20050
Meters
Sanitary Trunk Sewer
!( TRCA Erosion Control Structures
TW Erosion Control Works") 0 - 5 years
") 5 - 10 years
") unknown
TRCA Floodline
TRCA Floodplain
Flood Vulnerable Area Clusters
Hydro Line
Railway
Creeks
Taylor Massey Sub-Watershed Study Area
Taylor Massy Creek Sub-WatershedMaster Plan Development
Area 4
Kep Map
Flood and StreamRestoration
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Storm outfall with underminedgabion wall (RB)
Storm outfall, bankstability
Gabion wall (RB) outflanked,undermined
Pedestrian bridge
Utility pole near bankfailure
Gabion wall (LB)undermined
Pedestrian bridge withexposed footings
Perched culverts
Exposed geoweb andfailed gabion
Localized slope failure
Geomorphic and Infrastructure Issues
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Some rock in channelcreating minimal bedfeatures
Channel bed is interlockpieces of concrete andlow concrete banks beyond which banksare embankments
Some gravel materialon channel bed creatingpoorly formed riffles or bars
Paved concrete bednatural bank vegetation
Natural channel bed
Severe slope erosiontrail at risk
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Outfall eroded out ofbank broken piece in channel
Outfall creating scourpool
Natural channel bedthroughout upstream portion of reach
Elevated concretespillway
Concrete along baseof bank across fromoutfalls
Bank erosion
Elecated outfall
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Source: Geomorphic and Habitat Systems Study, Parrish Engineering 2013
Area 7
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. April 13, 20170 100 20050
Meters
Sanitary Trunk Sewer
!( Stormwater Management Facility
TRCA Floodline
TRCA Floodplain
Flood Vulnerable Area Clusters
Hydro Line
Railway
Creeks
Taylor Massey Sub-Watershed Study Area
Taylor Massy Creek Sub-WatershedMaster Plan Development
Area 5
Kep Map
Flood and StreamRestoration
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Small elevation drop inconcrete
Exposed manholes alongbanks
Vegetation in channelon banks
Small lateral bar forming
Small areas of graveldeposition
Vegetated bar upstreamof rail crossing
Geomorphic and Infrastructure Issues
Vegetated bar upstreamof crossing
Vegetated bar downstreamof crossing
Channel is heavily vegetatedwith cattails and phragmitesthrough extent of hydrocorridor
Small amount of bank erosiondownstream of pedestrianbridge
Some sand accumulation
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Source: Geomorphic and Habitat Systems Study, Parrish Engineering 2013
Area 8