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652502_WT0414151014KWO
WelcomeMunicipal Class Environmental Assessment for the Mud Creek Subwatershed
Public Information Centre #2April 23, 2015
Please sign in, and feel free to browse the information panels.
Your comments are important to us. Please complete one of the comment sheets and place it in the box provided, or send it to the address on the form prior to May 6, 2015.
Staff from the City and their consultants are available to answer any questions that you have.
City of London
Scott Mathers, MPA, P.Eng.Manager, Stormwater Management Unit
David Gough, P.Eng.Environmental Services Engineer
CH2M HILL
Tom Mahood, P.Eng.Project Manager
Adrienne Willoughby, E.I.T.Project Engineering Support
WBG111014013609KWO
Study Purpose and GoalsThe purpose of this Environmental Assessment (EA) is to determine the preferred drainage and stormwater management works within the Mud Creek Subwatershed to mitigate the issues associated with stormwater fl ows. The EA serves to develop environmentally sound recommendations that refl ect the current and future land use within the area, through a collaborative public and stakeholder consultation process.
Project Goals:
• Characterize the Mud Creek Subwatershed natural environment • Identify the stormwater management issues in the subwatershed• Develop alternatives to mitigate stormwater impacts• Develop issues-based evaluation criteria and select the
preferred alternative(s)• Engage
stakeholders to provide input throughout the study
Mud Creek Subwatershed Boundary
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Class Environmental Assessment Process
This is a Schedule B study which will be carried out under the Municipal Engineer’s Act (MEA) Class Environmental Assessment (EA) process, and will complete Phase 1 and Phase 2.
Phase 1Define the Problem or Opportunity
Phase 2Identify & Assess Alternative Solutions
Consult with Public, Agencies, First Nations, and otherstakeholders
Select a Preferred Solution(s) and Identify ProposedTiming for Implementing Preferred Solution(s)
Phase 3
Prepare alternative design concepts forthe Preferred Solution(s)
We AreHere
Sche
duleBProjects
Phase 4
Prepare Environmental Study Report(ESR) Documenting Phases 1 3 for publicreview
Phase 5
Project Implementation
Sche
duleCProjects
Schedule A / Schedule A+ ProjectsPre approved, typical, or emergency operationalinfrastructure improvement projects; proceed toimplementation
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Problem Statement
Phase 1 of the Class EA requires a Problem/Opportunity statement to be developed that outlines the need and objective for the study. The following specifi c goals and objectives have been developed to guide the EA and to form the Problem/Opportunity Statement:
• Establish stormwater management (SWM) criteria and environmental targets that are consistent with City and UTRCA policies and guidelines and which allow for planned development to proceed;
• Mitigate sedimentation and channel instability and enhance the morphology of Mud Creek through incorporation of fl uvial geomorphic design principals into Creek remediation;
• Reduce fl ooding along Oxford Street and Proudfoot Lane;
• Improve the Canadian National Railway (CNR) culvert performance and mitigate the impact of fl ooding upstream and downstream of this crossing;
• Conveyance of stormwater fl ow north of the Canadian Pacifi c Railway (CP) line;
• Mitigate sediment issues in culverts and connecting sewers tributary to Mud Creek;
• Restore and enhance the aquatic habitat in Mud Creek as well as the terrestrial habitat in the Creek corridor; and
• Enhance the visual character of the Mud Creek corridor and provide opportunities for the public to safely utilize the area for recreational purposes.
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Stud
y Ar
ea a
nd E
xist
ing
Subw
ater
shed
Cha
lleng
es
A nu
mbe
r of i
ssue
s in
the
Mud
Cre
ek S
ubw
ater
shed
hav
e be
en id
entifi
ed
whi
ch w
ill b
e ex
amin
ed a
s pa
rt of
this
stu
dy.
Thes
e is
sues
incl
ude:
OxfordStreet
WonderlandRoad
1
2
34
5 6
7 8
ProudfootLane
BeaverbrookAvenue
Mud
Creek
1.Ch
anne
linUpp
erRe
ach
3.Flo
odingo
nOx
ford
Street
Source:Lon
donFree
Press
4.Cu
lvertthrou
ghOxfordStreet
2.Ch
anne
lCulvertinUpp
erRe
ach
5.Ch
anne
linLower
Reach
7.Cu
lvertu
nder
Won
derla
ndRo
ad8.Outfallat
Tham
esRiver
6.Cu
lvertthrou
ghCa
nadian
Nationa
lRailway
• S
edim
enta
tion,
ero
sion
, and
inst
abili
ty is
sues
in th
e cr
eek
and
culv
erts
• P
oor p
erfo
rman
ce o
f the
Can
adia
n N
atio
nal R
ailw
ay (C
NR
) cul
vert
• C
onve
yanc
e of
sto
rmw
ater
fl ow
s up
stre
am o
f Can
adia
n P
acifi
c R
ailw
ay (C
PR
) lin
e
• S
torm
wat
er m
anag
emen
t ser
vici
ng fo
r infi
ll d
evel
opm
ent
• Fr
eque
nt fl
oodi
ng o
n O
xfor
d S
treet
and
Pro
udfo
ot L
ane
• Fl
oodi
ng p
oten
tial i
n th
e vi
cini
ty o
f Won
derla
nd R
oad,
R
iver
side
Driv
e, a
nd H
utto
n P
lace
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History of Mud Creek Subwatershed
Previous Studies1995 Mud Creek Subwatershed Study The original study of the Mud Creek Subwatershed was completed in 1995. This study documented the environmental and aquatic resources within the subwatershed, and recommended strategies to maintain and enhance natural features as the surrounding lands were developed.
2008 Environmental Assessment An Environmental Assessment (EA) was undertaken to identify the preferred stormwater mitigation strategies in the area. The EA was deferred as it was determined that an update to the Subwatershed Study was required prior to evaluating implementation strategies.
2014 Mud Creek Subwatershed Study UpdateA Subwatershed Study Update was completed in 2014 and included an update of the environmental and technical conditions surrounding Mud Creek, planning policies and zoning within the area, and a climate change analysis. The study recommended several stormwater mitigation strategies which will be included in the alternative evaluation in this EA.
Future Land DevelopmentOver the past few decades, the land within the Mud Creek Subwatershed has been developed signifi cantly. 54 hectares of land within the Mud Creek Subwatershed remain subject to future land use change. The main roads in the Subwatershed may be impacted by future road expansions.
Areas subject to change in Land Use
WBG111014013609KWO
Building upon the previous studies, the EA process requires fi eld investigations to confi rm the limits of natural features in the study area and to determine the wildlife, vegetation, and species-at-risk in the area.
Key assessments include:
• Vegetation Assessment• Aquatic Assessment and Mapping• Breeding Bird Survey• Amphibian Calling Survey• Wildlife Habitat Survey• Species at Risk SurveyThe project team will consult with the Ministry of Natural Resources and Forestry, and the Upper Thames River Conservation Authority. The results of these surveys will be used to develop environmental management and mitigation measures to protect key features and to enhance wildlife habitat.
Environmental Impact Study
Upper reach of Mud Creek
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Replacement or upgrading of culverts to include a natural channel design can restore sediment transport throughout the system and improve channel stability.
Stream Restoration
Culvert with natural channel bottom
0 5 10 15 20 25 30 35 40 45235
235.5
236
236.5
237
237.5
238
238.5
239
239.5
240
240.5
235
235.5
236
236.5
237
237.5
238
238.5
239
239.5
240
240.5
Christie Lake Pond Restoration Conceptual Cross Section
Typical Natural Channel Conceptual Design Drawing
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Stre
am R
esto
ratio
nLa
ndsc
ape
Stre
am re
stor
atio
n ca
n al
so a
ddre
ss b
ank
eros
ion
by s
uppo
rting
the
bank
s us
ing
natu
ral m
etho
ds (s
uch
as
will
ow b
undl
es, r
oot w
ads,
etc
.).
Ban
k er
osio
n al
ong
Ros
elan
d C
reek
, Bur
lingt
on, O
ntar
io
Nat
ural
cha
nnel
con
stru
ctio
n to
add
ress
ban
k er
osio
n al
ong
Ros
elan
d C
reek
, Bur
lingt
on, O
ntar
ioC
ompl
eted
Stre
am R
esto
ratio
n us
ing
Nat
ural
C
hann
el D
esig
n al
ong
Ros
elan
d C
reek
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Alte
rnat
ives
Dev
elop
men
t and
Eva
luat
ion
Bas
ed o
n th
e hy
drau
lic a
sses
smen
ts a
nd c
onsu
ltatio
n w
ith s
take
hold
ers
and
regu
latin
g ag
enci
es, a
list
of a
ltern
ativ
es w
ill
be d
evel
oped
that
mee
t the
goa
ls a
nd o
bjec
tives
of t
he s
tudy
.
Eva
luat
ion
crite
ria w
ill b
e de
velo
ped
whi
ch in
clud
e th
e fo
llow
ing
key
area
s:
•Impactso
nsensitive
terrestrialhabita
tsand
species
•Impactso
nsensitive
aquatic
habitatsand
species
•Impactso
nsurfa
ceand
grou
ndwater
system
s
Natural
•Impactso
nsensitive
terrestrialhabita
tsand
species
•Impactso
nsensitive
aquatic
habitatsand
species
•Impactso
nsurfa
ceand
grou
ndwater
system
s
Natural
Natural
•Meetsprojectg
oalsand
objectives
•Con
structability
•Lon
gevity
•Proventechno
logy
•Safety
Technical
•Meetsprojectg
oalsand
objectives
•Con
structability
•Lon
gevity
•Proventechno
logy
•Safety
Technical
Technical
•Localacceptability
•Com
pliancewith
fede
ral,provincial,
andlocalplans
&po
licies
•Impactso
nsurrou
ndingland
users
•Impactso
nparcels
subjecttochangesin
land
use
Social/Cu
ltural/
Legal
•Localacceptability
•Com
pliancewith
fede
ral,provincial,
andlocalplans
&po
licies
•Impactso
nsurrou
ndingland
users
•Impactso
nparcels
subjecttochangesin
land
use
Social/Cu
ltural/
Legal
Social/Cu
ltural/
Legal
•Capita
lcosts
•Ope
ratio
n&
Mainten
ance
costs
•Lifecyclecosts
Fina
ncial
•Capita
lcosts
•Ope
ratio
n&
Mainten
ance
costs
•Lifecyclecosts
Fina
ncial
Fina
ncial
WBG111014013609KWO
Category Criterion Description
Technical Flood Control The ability of the alternative to provide the required fl ooding control on Oxford Street and Proudfoot Lane Erosion Control - Upstream of CNR Crossing
The ability of the alternative to mitigate streambank erosion upstream of CNR crossing
Erosion Control - Downstream of CNR Crossing
The ability of the alternative to mitigate streambank erosion downstream of CNR crossing
Conveyance Control The ability of the alternative to convey stormwater fl ows and improve the capacity of the conveyance system Constructability, Implementation, and Work Scope
The ability of the alternative to be constructed and implemented on a technical, regulatory, and practical basis; within a reasonable scope of work
Operations & Maintenance The ability of the alternative to be operated and maintained with ease Compatibility with Development and Growth
The compatibility of the alternative with development planning
Compatibility with Transportation Master Plan
The compatibility of the alternative with the City's Transportation Master Plan (expansion of Oxford Street to provide rapid transit corridor)
Environmental Quality Control The potential of the alternative to maintain or improve water quality Geomorphology The potential of the alternative to result in a stable streambank condition with respect to slope stability and erosion Sedimentation The potential for the alternative to optimize sediment transportWildlife / Species at Risk The ability of the alternative to protect sensitive wildlife species / species at risk Vegetation / Invasive Species The ability of the alternative to protect high quality vegetation including native species Terrestrial Habitat The potential for the alternative to maintain or enhance terrestrial habitatAquatic Habitat The potential for the alternative to maintain or enhance aquatic habitatGroundwater The ability of the alternative to protect groundwater resources
Social Cultural Heritage The potential of the alternative to protect cultural/heritage resourcesPublic Health & Safety The potential of the alternative to minimize risk or liability to community health and safety resulting from fl ooding Occupational Health & Safety The potential of the alternative to minimize risk or liability to occupational health and safety resulting from fl ooding Recreation The ability of the alternative to provide or enhance recreational activities (existing trails and potential greenspace
development) Aesthetics The ability of the alternative to maintain or enhance the visual character of the area Stakeholder Acceptance The potential of the alternative to be accepted by stakeholders including landowners, First Nations, and the public
Planning Consistency with Planning Policy The ability of the alternative to adhere to the City's Offi cial Plan Agency Approvals The ability of the alternative to be meet required approvals from the City of London and regulating agencies
(UTRCA, MNRF, MOECC, DFO)Property Acquisitions The relative impact that the alternative has on property acquisition requirements
Economic
Capital Cost Estimated capital cost Operations and Maintenance Cost
Estimated ongoing operation and maintenance
Lifecycle Cost Total annual capital and O&M costs amortized over 20 years
Evaluation Criteria
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Opportunities andConstraints
Opportunity Constraint
CN Culvert
Expand capacity to improve stream hydraulics
Constructability and ease of access in the area may be limited
Potential for cost sharing from CNR Downstream fl ooding from the Thames River will not be addressed by expanding the culvert
Downstream of the culvert the creek is fl ush with the current culvert elevation; therefore, lowering the culvert elevation would require additional creek modifi cations downstream to the Thames River
Stream Longitudinal Profi les
Improve profi les throughout creek system Need to maintain pedestrian bridges and culverts
Oxford/Proudfoot Culverts
Expand capacity to improve hydraulics
Create new culvert through Oxford street (diagonally) to have a more natural stream fl ow
90 degree creek turn north of Oxford is not an ideal stream pattern
Development
Land trading The fi nal design needs to accommodate development
Opportunity at Proudfoot/Oxford development to plant behind the River setback
Overland Flow Drainage North of CP Rail
No major fl ow constraint as the fl ows go east towards the Thames River
Geomorphic/Natural Heritage
Stabilize banks on downstream end Local resident yards and properties
Localized improvements downstream of CN culvert (opportunity to create benfi cial meander patterns downstream of culvert), Bioengineering solutions will be used to improve hydraulic grade lines (HGLs), stream profi les, to add sinuosity and creek meanders
Possible wetland upstream of CN culvert (to be confi rmed through environmental surveys)
Improve riparian areas and fi sh transport in between Proudfoot and Oxford
Improve HGL to reduce future sedimentation
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List
of A
ltern
ative
sAl
tern
ativ
esA
ltern
ativ
e 1:
Do
Not
hing
Alte
rnat
ive
2: N
o im
prov
emen
ts to
the
CN
R c
ulve
rt w
ith
quan
tity
cont
rol u
pstre
am o
f CN
R c
ulve
rt.
Alte
rnat
ive
3: T
he C
NR
cul
vert
will
be lo
wer
ed a
nd e
nlar
ged.
Th
e Pr
oudf
oot L
ane
and
Oxf
ord
Stre
et c
ross
ings
will
be c
lean
ed
out/u
pgra
ded
in th
eir c
urre
nt lo
catio
n. T
he M
ud C
reek
Cha
nnel
w
ill be
wid
ened
and
dee
pene
d.
Alte
rnat
ive
4: T
he C
NR
cul
vert
will
be lo
wer
ed a
nd e
nlar
ged.
Th
e Pr
oudf
oot L
ane
cros
sing
will
be c
lean
ed o
ut/u
pgra
ded
in
the
curre
nt lo
catio
n. T
he O
xfor
d St
reet
cro
ssin
g w
ill be
relo
cate
d ea
st to
real
ign
Mud
Cre
ek fr
om O
xfor
d St
reet
to P
roud
foot
Lan
e.
The
Mud
Cre
ek C
hann
el w
ill be
wid
ened
and
dee
pene
d.
Alte
rnat
ives
1 a
nd 2
do
not a
ddre
ss th
e ke
y is
sues
iden
tifi e
d fo
r the
Mud
Cre
ek S
ubw
ater
shed
. The
refo
re, t
hey
have
bee
n el
imin
ated
from
furth
er e
valu
atio
n.
Elem
ents
Com
mon
to A
ltern
ativ
es 2
, 3, a
nd 4
Cha
nnel
s: N
atur
aliz
atio
n of
the
chan
nel i
nclu
ding
cl
eani
ng, b
ank
repa
ir, a
nd b
ank
stab
iliza
tion
upst
ream
of
the
CN
R c
ulve
rt
Rip
aria
n: R
ehab
ilita
tion
of ri
paria
n ve
geta
tion
buffe
r
Priv
ate
Perm
anen
t Sys
tem
s (P
PS) Q
ualit
y an
d Q
uant
ity: F
or q
ualit
y an
d qu
ality
con
trol o
n fu
ture
de
velo
pmen
t lan
ds
Sew
ers/
Cul
vert
s: C
lean
out o
f sew
ers
and
culv
erts
for
sele
ct re
ache
s of
Mud
Cre
ek
Ups
trea
m F
lood
ing:
Flo
od m
anag
emen
t nor
th o
f the
C
P ra
ilway
and
mai
ntai
n or
impr
ove
the
fl ow
path
via
be
rms
as n
eces
sary
Nat
ural
Are
as: M
aint
ain
or e
nhan
ce n
atur
al a
reas
(fo
rest
)
WBG111014013609KWO
Short Listed Alternatives – Alternative 3
LEGEND:
Riparian Corridor
Culvert Cleanout / Upgrade
Channel Stabilization/ Protection / Rehab / Cleaning
Sewer/Channel Channel Deepening / Widening / Protection
Major SystemOnsite Quality/Quantity Control
Natural Area
1000 ft
Mud CreekAlternative 3Mud Creek Subwatershed Environmental AssessmentCity of London, London, Ontario
New CNR Culvert
©2015 Google
WBG111014013609KWO
Short Listed Alternatives – Alternative 4
LEGEND:
Riparian Corridor
Culvert Cleanout / Upgrade
Channel Stabilization/ Protection / Rehab / Cleaning
Sewer/Channel Channel Deepening / Widening / Protection
Major SystemOnsite Quality/Quantity Control
Natural Area
1000 ft
Mud CreekAlternative 4Mud Creek Subwatershed Environmental AssessmentCity of London, London, Ontario
New Culvert
©2015 Google
The Final Preferred Alternative will be identifi ed following input from the Public and a detailed technical analysis of the alternatives will be conducted (i.e. hydrological and hydraulic modelling).
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Proj
ect S
ched
ule
and
Con
sulta
tion
Proc
ess
Data
Collection&Re
view
•Re
view
historicalstud
iesa
ndproject
inform
ation.
•ProjectTeam
Meetin
gsinclud
ingCity
staffa
ndconsultantso
ccur
througho
uttheproject.
Stakeh
olde
rand
Agen
cyCo
nsultatio
n•
Upp
erTham
esRiverC
onservationAu
thority
•Ministry
oftheEnvironm
enta
ndClim
ate
Change
•Ministry
ofNaturalRe
sources
•Canadian
NationalRailway
•Land
owne
rs
PublicInform
ationCe
nter
No.
1
•Noticeof
Commen
cementa
ndPIC
issue
dNovem
ber6
thand13
th.
•Co
mmentsreceived
atthePICwillbe
incorporated
into
thenextstep
s.
FallFieldInvestigations
•Fieldinvestigations
toassessthenatural
features
ofthesubw
atershed
willbe
cond
uctedinthefallandinthesprin
g.•
Fieldinvestigations
willsupp
ortthe
Environm
entalImpactStud
y.
Fall2014
Winter2
014–2015
Hydrolog
ican
dHy
drau
licMod
eling
•Hy
drologicandhydraulic
mod
elsw
illbe
used
tode
velopalternatives.
•TheUTR
CAwillbe
consultedthrougho
utthemod
elingprocess.
Stream
Assessmen
t
•Theaquatic
characteristicso
fMud
Creek
willbe
analyzed
inorde
rtode
velop
desig
ncrite
riafora
healthystream
system
.
Sprin
g2015
Sprin
gFieldInvestigations
•Fieldinvestigations
toassessthenatural
features
ofthesubw
atershed
willbe
cond
uctedinthefallandinthesprin
g.•
Fieldinvestigations
willsupp
ortthe
Environm
entalImpactStud
y.
Alternatives
Developm
ent
•Po
tentialalte
rnatives
andevaluatio
ncrite
riawillbe
develope
d.
PublicInform
ationCe
nter
No.
2
•Thenextpu
blicinform
ationcenter
will
seek
inpu
tfrom
thepu
blicon
thelisto
falternatives.
•ThePICwillbe
heldinsprin
gof
2015.
SelectPreferredAlternative
•Co
mmentsfrom
thePICwillbe
received
andaddressed.
•Thepreferredalternative(s)willbe
selected
.
DraftE
ARe
porting
•TheEA
processw
illbe
documented.
•Therecommen
datio
nswillbe
sent
toCity
Coun
cilfor
endo
rsem
ent.
•ANoticeof
ProjectC
ompletionwillbe
distrib
uted
.
Summer
2015
Fina
lEARe
porting
•Thefin
alrecommen
datio
nswillbe
available
forp
ublic
review
andcommen
tfor
a30
day
perio
d.•
Ifno
substantiveissue
sare
identifiedby
stakeh
olde
rs,the
projectw
illproceedto
implem
entatio
n.
We
Are
Here
652502_WT0414151014KWO
Thank You
Thank you for your interest in the Mud Creek SubwatershedEnvironmental Assessment.
For further information, please contact:
Scott Mathers, MPA, P.Eng.Project ManagerCity of LondonT: 519-661-2500 ext. 4430E: [email protected]