Ausable Bayfie ld Conse r Ausable Bayfie ld Conse r vation Author - - PowerPoint PPT Presentation
Ausable Bayfie ld Conse r Ausable Bayfie ld Conse r vation Author vation Author ity ity Shor Shor e line Manage me nt Plan Update e line Manage me nt Plan Update Ste e ring Co mmitte e Me e ting : July 2016 Ste e ring Co
Ausable Bayfie ld Conse r vation Author ity – Shor e line Manage me nt Plan Update Ausable Bayfie ld Conse r vation Author ity – Shor e line Manage me nt Plan Update
Ste e ring Co mmitte e Me e ting : July 2016 Ste e ring Co mmitte e Me e ting : July 2016
K a re n Wia ne c ki K a re n Wia ne c ki
his is a dra ft do c ume nt.
his is a Co nsulta nt Re c o mme nda tio ns Re po rt to ABCA.
his do c ume nt ha s no t b e e n sha re d o r e ndo rse d with the ABCA Bo a rd o f Dire c to rs.
nput fro m the pub lic sho uld fo c us o n the re c o mme nde d po lic y a ppro a c h.
his is a dra ft do c ume nt.
his is a Co nsulta nt Re c o mme nda tio ns Re po rt to ABCA.
his do c ume nt ha s no t b e e n sha re d o r e ndo rse d with the ABCA Bo a rd o f Dire c to rs.
nput fro m the pub lic sho uld fo c us o n the re c o mme nde d po lic y a ppro a c h.
Pro c e ss o f upda ting the Sho re line Ma na g e me nt Pla n (SMP) b e g a n in July 2015 Pro je c t T
e a m & Ste e ring Co mmitte e
Ado pte d a pra g ma tic a nd sc ie nc e fo c use d a ppro a c h
Re c e ssio n Ra te c a lc ula tio n Clima te Cha ng e & Po te ntia l I
mplic a tio ns
Co he sive Bluffs F
ie ld Visits
Co mpre he nsive Re vie w o f c urre nt Po lic y (no ne w ha za rds, no a g g ra va tio n o f e xisting ha za rds a nd
no a dve rse e nviro nme nta l impa c ts)
Appro a c he s in o the r jurisdic tio ns
Pro c e ss o f upda ting the Sho re line Ma na g e me nt Pla n (SMP) b e g a n in July 2015 Pro je c t T
e a m & Ste e ring Co mmitte e
Ado pte d a pra g ma tic a nd sc ie nc e fo c use d a ppro a c h
Re c e ssio n Ra te c a lc ula tio n Clima te Cha ng e & Po te ntia l I
mplic a tio ns
Co he sive Bluffs F
ie ld Visits
Co mpre he nsive Re vie w o f c urre nt Po lic y (no ne w ha za rds, no a g g ra va tio n o f e xisting ha za rds a nd
no a dve rse e nviro nme nta l impa c ts)
Appro a c he s in o the r jurisdic tio ns
Also a do pte d a n ‘ e ng a g e me nt’ mindse t
Ste e ring Co mmitte e is multi-re pre se nta tio na l (g o ve rnme nt, industry a nd c o mmunity) T
ho se dire c tly a ffe c te d ha ve b e e n no t o nly info rme d b ut e ng a g e d sinc e the inc e ptio n o f the pro je c t
Dra ft do c ume nt re c o g nize s tha t tho se mo st dire c tly a ffe c te d – the la ndo wne r – ne e d to b e
a wa re o f the issue s a nd the re c o mme nde d a ppro a c he s
F
ull disc lo sure o f a ll ma te ria l a s it b e c a me a va ila b le – this do c ume nt ha s no t b e e n sha re d with the ABCA Bo a rd o f Dire c to rs – it is b e ing pre se nte d first to the Ste e ring Co mmitte e in ho no ur o f o ur c o mmitme nt to wo rk with yo u
Co mmunity Ne wsle tte rs a nd upda te s to ke e p e ve ryo ne info rme d
Also a do pte d a n ‘ e ng a g e me nt’ mindse t
Ste e ring Co mmitte e is multi-re pre se nta tio na l (g o ve rnme nt, industry a nd c o mmunity) T
ho se dire c tly a ffe c te d ha ve b e e n no t o nly info rme d b ut e ng a g e d sinc e the inc e ptio n o f the pro je c t
Dra ft do c ume nt re c o g nize s tha t tho se mo st dire c tly a ffe c te d – the la ndo wne r – ne e d to b e
a wa re o f the issue s a nd the re c o mme nde d a ppro a c he s
F
ull disc lo sure o f a ll ma te ria l a s it b e c a me a va ila b le – this do c ume nt ha s no t b e e n sha re d with the ABCA Bo a rd o f Dire c to rs – it is b e ing pre se nte d first to the Ste e ring Co mmitte e in ho no ur o f o ur c o mmitme nt to wo rk with yo u
Co mmunity Ne wsle tte rs a nd upda te s to ke e p e ve ryo ne info rme d
1.0
Ba c kg ro und & I ntro duc tio n 2.0 T he L e g isla tive Autho rity – Po lic y & T e c hnic a l Dire c tio n 3.0 A Ne w Visio n, Go a ls, Ob je c tive s & Princ iple s 4.0 Sho re line De sc riptio n 5.0 Unde rsta nding Sho re line Ha za rds 6.0 Spe c ia l Co nside ra tio ns 7.0 Ma na g ing the Sho re line Re spo nsib ly 8.0 Re c o mme nda tio ns fo r F urthe r Ac tio n 9.0 Additio na l Re fe re nc e s a nd Re so urc e s
1.0
Ba c kg ro und & I ntro duc tio n 2.0 T he L e g isla tive Autho rity – Po lic y & T e c hnic a l Dire c tio n 3.0 A Ne w Visio n, Go a ls, Ob je c tive s & Princ iple s 4.0 Sho re line De sc riptio n 5.0 Unde rsta nding Sho re line Ha za rds 6.0 Spe c ia l Co nside ra tio ns 7.0 Ma na g ing the Sho re line Re spo nsib ly 8.0 Re c o mme nda tio ns fo r F urthe r Ac tio n 9.0 Additio na l Re fe re nc e s a nd Re so urc e s
T
he b ro a de r ‘ e nviro nme nt’ (c lima te c ha ng e )
T
he sho re line itse lf
T
he na ture o f de ve lo pme nt
T
he Po lic y pla tfo rm
T
he b ro a de r ‘ e nviro nme nt’ (c lima te c ha ng e )
T
he sho re line itse lf
T
he na ture o f de ve lo pme nt
T
he Po lic y pla tfo rm
ABCA to wo rk c o lla b o ra tive ly with la ndo wne rs who a re a ffe c te d a nd with munic ipa l a nd
pro vinc ia l pa rtne rs
ABCA to re duc e risks fro m the ha za rd b ut to e nsure the risks to the ha za rd do no t inc re a se ABCA to wo rk c o lla b o ra tive ly with la ndo wne rs who a re a ffe c te d a nd with munic ipa l a nd
pro vinc ia l pa rtne rs
ABCA to re duc e risks fro m the ha za rd b ut to e nsure the risks to the ha za rd do no t inc re a se
No de ve lo pme nt in the ha za rd zo ne
Re c o mme nde d tha t a pre ve ntio n-first philo so phy b e a do pte d – this is e ntire ly c o nsiste nt with
Ca b ine t a ppro ve d po lic y a nd suppo rte d b y munic ipa l Offic ia l Pla ns
Stro ng e r sta nd o n mino r a lte ra tio ns/ c ha ng e s to e xisting use s
Curre ntly, mino r a lte ra tio ns a re pe rmitte d in L
a ke sho re Are a 1 a nd 2
Re c o mme nde d tha t a lte ra tio ns b e pha se d o ut o ve r time
Stro ng e r sta nd o n sho re line pro te c tio n wo rks
Re c o mme nde d tha t no ne w sho re line pro te c tio n wo rks b e pe rmitte d
No de ve lo pme nt in the ha za rd zo ne
Re c o mme nde d tha t a pre ve ntio n-first philo so phy b e a do pte d – this is e ntire ly c o nsiste nt with
Ca b ine t a ppro ve d po lic y a nd suppo rte d b y munic ipa l Offic ia l Pla ns
Stro ng e r sta nd o n mino r a lte ra tio ns/ c ha ng e s to e xisting use s
Curre ntly, mino r a lte ra tio ns a re pe rmitte d in L
a ke sho re Are a 1 a nd 2
Re c o mme nde d tha t a lte ra tio ns b e pha se d o ut o ve r time
Stro ng e r sta nd o n sho re line pro te c tio n wo rks
Re c o mme nde d tha t no ne w sho re line pro te c tio n wo rks b e pe rmitte d
Judy Sulliva n & Ro b in Da vidso n-Arno tt Judy Sulliva n & Ro b in Da vidso n-Arno tt
Sho re line fie ld o b se rva tio ns we re c a rrie d o ut o ve r a two -da y pe rio d in Se pte mb e r (29th &
30th), 2015
1st da y - e xa mine flo o ding a nd dyna mic b e a c h ha za rds Sho re line fie ld o b se rva tio ns we re c a rrie d o ut o ve r a two -da y pe rio d in Se pte mb e r (29th &
30th), 2015
1st da y - e xa mine flo o ding a nd dyna mic b e a c h ha za rds
T
ra nsitio n zo ne s fro m the Dyna mic Be a c h to the E ro sio n Ha za rd a re a s.
T
ra nsitio n zo ne s fro m the Dyna mic Be a c h to the E ro sio n Ha za rd a re a s.
1st Da y - se ve ra l e ro sio n ha za rd site s
b luffs a nd unsta b le slo pe s (e .g . Po pla r Be a c h).
1st Da y - se ve ra l e ro sio n ha za rd site s
b luffs a nd unsta b le slo pe s (e .g . Po pla r Be a c h).
2nd da y fo c use d o n:
e ro sio n ha za rds a sso c ia te d with b luffs a nd unsta b le slo pe s.
2nd da y fo c use d o n:
e ro sio n ha za rds a sso c ia te d with b luffs a nd unsta b le slo pe s.
E xisting Wo rks:
va rie ty o f inc o nsiste nt, pie c e me a l a nd a d ho c wo rks.
E xisting Wo rks:
va rie ty o f inc o nsiste nt, pie c e me a l a nd a d ho c wo rks.
E xisting Wo rks:
de te rio ra te d g a b io n b a ske ts, wo o de n fra me s insuffic ie nt o r unde rsize d ro c k ma te ria ls
E xisting Wo rks:
de te rio ra te d g a b io n b a ske ts, wo o de n fra me s insuffic ie nt o r unde rsize d ro c k ma te ria ls
Pro te c tio n wo rks c a n g ive a fa lse se nse o f se c urity: Pho to I ndic a te s pro te c tio n wo rks a t to e o f slo pe BUT the e ntire slo pe is still unsta b le a nd fa iling Pro te c tio n wo rks c a n g ive a fa lse se nse o f se c urity: Pho to I ndic a te s pro te c tio n wo rks a t to e o f slo pe BUT the e ntire slo pe is still unsta b le a nd fa iling
Ro b in Da vidso n-Arno tt Ro b in Da vidso n-Arno tt
hre e c o mpo ne nts o f c o he sive b luff pro file
during sto rms
slumping a nd flo wing wa te r
wa ve a c tio n to de pth o f 6-10 m
nitia te d thro ug h to e e ro sio n b y wa ve s during sto rms
slo pe , trig g e rs slumping a s we ll a s e ro sio n b y wa te r o n uppe r slo pe
to c o ntinue to re a c h b luff to e
e ro de d ma te ria l a nd re duc e s b uild up o f pro te c tive sa nd c o ve r
e ffe c tive ne ss o f “a ssa iling ” vs. “re sisting ” fo rc e s
a c ro ss ne a rsho re – e ro sio n o f ne a rsho re – ma y re a c h b luff to e
stre ng th o f till, e ffe c ts o f we a the ring a nd pro te c tio n pro vide d b y surfic ia l se dime nt c o ve r
impa c t, fluid fo rc e s a nd pa rtic ula rly b y a b ra sio n due to sa nd a nd g ra ve l
ro sio n a ide d b y we a the ring o f till whic h le a ds to a re duc tio n in stre ng th
le ve l
we a the re d la ye r – e spe c ia lly during sno w me lt a nd he a vy ra in
rill de ve lo pme nt whe re ve g e ta tio n disturb e d
le ve l due to mo re fre q ue nt unde rc utting b y to e e ro sio n
ne a rsho re pro file thro ug h fluid fo rc e s a nd b y a b ra sio n due to mo ve me nt o f sa nd a nd g ra ve l
ro sio n pre ve nts de ve lo pme nt o f a pla tfo rm in fro nt o f b luff - a llo ws fo r wa ve a c tio n a t to e to c o ntinue
sub je c t to inc re a se d wa ve e ne rg y o ve r time
ne a rsho re pro file thro ug h fluid fo rc e s a nd b y a b ra sio n due to mo ve me nt o f sa nd a nd g ra ve l
ro sio n a ide d b y so fte ning o f till due to e xpa nsio n a nd pumping a c tio n o f wa ve s
the re is wa ve a c tio n – 1-20 mm
a nnua l e ro sio n g re a te st c lo se to sho re a nd de c re a se s o ffsho re
Ave ra g e a nnua l unde rwa te r e ro sio n, Grimsb y, L a ke Huro n
ro sio n e nha nc e d b y thin c o ve r
hic k c o ve ring o f sa nd a nd g ra ve l re duc e s te mpo ra l a nd spa tia l e xpo sure o f till a nd the re fo re re duc e d e ro sio n ra te
thic kne ss o f se dime nts in ne a rsho re e xpla ins re la tive ly lo w ra te s o f e ro sio n a lo ng pa rts o f ABCA c o he sive b luff sho re line
Surve y a nd the 2007 ABCA ma pping we re c o mple te d
inc o rpo ra te d into ne w c a lc ula tio ns o f se tb a c ks a lo ng the c o he sive b luff sho re line
so uthe rn se c tio ns o f the ABCA c o he sive b luff sho re line in the SMP
Surve y a nd the 2007 ABCA ma pping we re c o mple te d
inc o rpo ra te d into ne w c a lc ula tio ns o f se tb a c ks a lo ng the c o he sive b luff sho re line
so uthe rn se c tio ns o f the ABCA c o he sive b luff sho re line in the SMP
No rthe rn Re c e ssio n Ra te Ma p – Ave ra g e Annua l Bluff T
ro sio n Ra te s 1973-2007.
No rthe rn Re c e ssio n Ra te Ma p – Ave ra g e Annua l Bluff T
ro sio n Ra te s 1973-2007.
So uthe rn Re c e ssio n Ra te Ma p – Ave ra g e Annua l Bluff T
So uthe rn Re c e ssio n Ra te Ma p – Ave ra g e Annua l Bluff T
Ave r age Annual Re c e ssion Rate (m/ yr .) % of ABCA Cohe sive Bluff Shor e line MNRF Classific ation
Mo st o f the F lo o ding Ha za rds o c c ur in the Po rt F ra nks Are a :
ssue s a re re la te d to Rive r F lo o ding a nd
lo o ding whe re the Dyna mic Be a c he s a re a lso a t the mo uths o f rive rs (I .e . Ba rrie r Be a c he s)
F lo o ding o c c urs in the Po rt F ra nks Are a is re late d to the c o mb ina tio n o f the Rive r & L
ying Dyna mic Be a c h Are a s F lo o ding o c c urs in the Po rt F ra nks Are a is re late d to the c o mb ina tio n o f the Rive r & L
ying Dyna mic Be a c h Are a s
Ba rrie r b e a c he s a re e xtre me ly dyna mic a nd ma y b e c o mple te ly o ve rwa she d during sto rm e ve nts. E spe c ia lly in the Po rt F ra nks a re a whe re the F lo o ding Ha za rd is a lso a n issue fro m the rive r b e hind the Ba rrie r Syste m Ba rrie r b e a c he s a re e xtre me ly dyna mic a nd ma y b e c o mple te ly o ve rwa she d during sto rm e ve nts. E spe c ia lly in the Po rt F ra nks a re a whe re the F lo o ding Ha za rd is a lso a n issue fro m the rive r b e hind the Ba rrie r Syste m
Dyna mic Be a c h with Sa nd Dune s Co he sive Bluff Sho re line with Dyna mic Be a c h in F
ro nt
Dyna mic Be a c h with Sa nd Dune s Co he sive Bluff Sho re line with Dyna mic Be a c h in F
ro nt
No n-E ro sio na l Dyna mic Be a c he s Ha za rd limit:
F
looding hazar d limit, the 100- ye ar flood le ve l plus a n a llo wa nc e fo r wa ve uprush a nd o the r
wa te r re la te d ha za rds o f 15 me tr
e s o n Gre a t L
a ke s,
plus the Dynamic Be ac h Allowanc e (30 m) o n the L
a ke Huro n syste m. No n-E ro sio na l Dyna mic Be a c he s Ha za rd limit:
F
looding hazar d limit, the 100- ye ar flood le ve l plus a n a llo wa nc e fo r wa ve uprush a nd o the r
wa te r re la te d ha za rds o f 15 me tr
e s o n Gre a t L
a ke s,
plus the Dynamic Be ac h Allowanc e (30 m) o n the L
a ke Huro n syste m.
‘ Dynamic Be ac h Hazar
d bac ke d by a Bluff/ Cliff’ the n
ADD the E ro sio n Ha za rd a n a dditio na l e ro sio n a llo wa nc e + Slo pe Sta b ility Allo wa nc e a sso c ia te d with the Bluff E ro sio n
Ob liq ue a e ria l
pho to g ra ph o f a po rtio n
so uth o f Ba yfie ld sho wing a dyna mic b e a c h b a c ke d b y a n e ro ding c o he sive b luff.
Ob liq ue a e ria l
pho to g ra ph o f a po rtio n
so uth o f Ba yfie ld sho wing a dyna mic b e a c h b a c ke d b y a n e ro ding c o he sive b luff.
Sta b le Slo pe Allo wa nc e PL US 100 Ye a r Ave ra g e Annua l Re c e ssio n Ra te (AARR) Sta b le Slo pe Allo wa nc e PL US 100 Ye a r Ave ra g e Annua l Re c e ssio n Ra te (AARR)
to e e ro sio n a nd do wnc utting unde rne a th wa te r a lo ng the c o he sive sho re s to e e ro sio n a nd do wnc utting unde rne a th wa te r a lo ng the c o he sive sho re s
Unsta b le / F a iling Slo pe s:
F
a iling & Slumping ma te ria ls, te nsio n c ra c ks,
sc a rps, b umps, b ulg e s o n the slo pe fa c e F
a lle n tre e s, unsta b le sta irc a se s Unsta b le / F a iling Slo pe s:
F
a iling & Slumping ma te ria ls, te nsio n c ra c ks,
sc a rps, b umps, b ulg e s o n the slo pe fa c e F
a lle n tre e s, unsta b le sta irc a se s
Unsta b le / F a iling Slo pe s:
Cra c ks in struc ture s, Shifting fe nc e s Unsta b le sta irc a se s
Unsta b le / F a iling Slo pe s:
Cra c ks in struc ture s, Shifting fe nc e s Unsta b le sta irc a se s
T he Issue :
Afte r a fie ld re vie w o f the ABCA sho re line , the c o nsulting te a m ha s e xpre sse d sig nific a nt
c o nc e rn a b o ut the numb e r o f dwe lling s tha t we re within L a ke sho re Are a 1 in the b luff a re a no rth o f Gra nd Be nd.
T he Issue :
Afte r a fie ld re vie w o f the ABCA sho re line , the c o nsulting te a m ha s e xpre sse d sig nific a nt
c o nc e rn a b o ut the numb e r o f dwe lling s tha t we re within L a ke sho re Are a 1 in the b luff a re a no rth o f Gra nd Be nd.
ABCA unde rto o k a ma pping e xe rc ise (no fie ld wo rk ve rific a tio n) a nd fo und… ABCA unde rto o k a ma pping e xe rc ise (no fie ld wo rk ve rific a tio n) a nd fo und…
Distanc e to T
T
Numbe r
Dwe lling Units T
Ac c e ssory Buildings/ Str uc tur e s T
Additional Comme nts 5 m
108 126 234 Struc ture s within 5 me tre s o f the to p o f b a nk a re g e ne ra lly sc a tte re d a lo ng the sho re line ra the r tha n b e ing c luste re d in spe c ific sub divisio ns.
10 m
153 55 208 Struc ture s within 10 a nd 15 me tre s o f the to p o f b a nk a re g e ne ra lly c luste re d in spe c ific sub divisio ns ra the r tha n b e ing sc a tte re d a lo ng the sho re line .
15 m
274 83 357
T
e rra pro b e de ve lo ping a L a ndo wne r F a c t She e t
T
e rra pro b e de ve lo ping a L a ndo wne r F a c t She e t
Ho me s a re e xtre me ly
c lo se to a n e ro ding sho re line a nd unsta b le b luff a nd a furthe r g e o te c hnic a l inve stig a tio n ha s b e e n re c o mme nde d to q ua lify a nd q ua ntify the sa fe ty issue s, a nd the e xte nt o f the se pro b le ms.
Ho me s a re e xtre me ly
c lo se to a n e ro ding sho re line a nd unsta b le b luff a nd a furthe r g e o te c hnic a l inve stig a tio n ha s b e e n re c o mme nde d to q ua lify a nd q ua ntify the sa fe ty issue s, a nd the e xte nt o f the se pro b le ms.
A de taile d inve stigation of the de gr
e e of r isk was not par t of the sc ope of wor k assigne d to the c onsulting te am - if this issue ar
wor k, T e r r apr
ide ntifie d in the or iginal Pr
Unsolic ite d Pr
e c e ive d fr
e r r apr
Age nda mate r ial)
T
e r r apr
Phase 1: A de skto p re vie w o f the available info rmatio n (to po graphic maps pro vide d by the c lie nt, ae rial pho to graphic data and publishe d ge o lo gic al subsurfac e info rmatio n c o mprising sho re line slo pe s) and c o nsultatio n with Aqua S
nc . to ide ntify the Are as o f Co nc e rn within the study limits re quiring furthe r asse ssme nt. Phase 2: A highe r le ve l re vie w o f the available info rmatio n fo r the Are as o f Co nc e rn in c o njunc tio n with site visit, slo pe mapping, site me asure me nts o f the se tbac ks o f se le c te d struc ture s fro m the e xisting c re st, and c o nsultatio n with Aqua S
nc ., to c ate go rize zo ne
ignific ant (Z
ailure ) and Z
lo pe I nstability Risks.
A de taile d inve stigation of the de gr
e e of r isk was not par t of the sc ope of wor k assigne d to the c onsulting te am - if this issue ar
wor k, T e r r apr
ide ntifie d in the or iginal Pr
Unsolic ite d Pr
e c e ive d fr
e r r apr
Age nda mate r ial)
T
e r r apr
Phase 1: A de skto p re vie w o f the available info rmatio n (to po graphic maps pro vide d by the c lie nt, ae rial pho to graphic data and publishe d ge o lo gic al subsurfac e info rmatio n c o mprising sho re line slo pe s) and c o nsultatio n with Aqua S
nc . to ide ntify the Are as o f Co nc e rn within the study limits re quiring furthe r asse ssme nt. Phase 2: A highe r le ve l re vie w o f the available info rmatio n fo r the Are as o f Co nc e rn in c o njunc tio n with site visit, slo pe mapping, site me asure me nts o f the se tbac ks o f se le c te d struc ture s fro m the e xisting c re st, and c o nsultatio n with Aqua S
nc ., to c ate go rize zo ne
ignific ant (Z
ailure ) and Z
lo pe I nstability Risks.
ve rything
ve rything
Slo pe sta b iliza tio n ma y no t b e fe a sib le o n so me sho re line s suc h a s c o he sive sho re s due to
c o ntinuo us unde rc utting a nd e ro sio n o c c urring o ffsho re (unde r wa te r) whic h ma y impa c t the lo ng -te rm sta b ility o f the slo pe .
Slo pe sta b iliza tio n ma y no t b e fe a sib le o n so me sho re line s suc h a s c o he sive sho re s due to
c o ntinuo us unde rc utting a nd e ro sio n o c c urring o ffsho re (unde r wa te r) whic h ma y impa c t the lo ng -te rm sta b ility o f the slo pe .
On the ABCA c o he sive sho re s, a
lo ng te rm sta b iliza tio n o f the to e
pro te c tio n wo rks, a re no t fe a sib le b e c a use o f this o ffsho re unde rc utting a nd e ro sio n.
Bluff Me a sure s a re po ssib le b ut
a re o nly te mpo ra ry a nd will no t sto p the do wnc utting tha t is
ultima te ly will re a c h the to e o f the slo pe , e ve ntua lly c a using furthe r slo pe insta b ility
On the ABCA c o he sive sho re s, a
lo ng te rm sta b iliza tio n o f the to e
pro te c tio n wo rks, a re no t fe a sib le b e c a use o f this o ffsho re unde rc utting a nd e ro sio n.
Bluff Me a sure s a re po ssib le b ut
a re o nly te mpo ra ry a nd will no t sto p the do wnc utting tha t is
ultima te ly will re a c h the to e o f the slo pe , e ve ntua lly c a using furthe r slo pe insta b ility
I
t is impe ra tive tha t a ny sig ns o f slo pe insta b ility a re b ro ug ht to the imme dia te a tte ntio n o f the ABCA a nd the munic ipa lity.
All a ppro va ls a nd pe rmits must b e se c ure d fro m a pplic a b le re g ula to ry a utho ritie s prio r to
a ny site c o nstruc tio n.
T
he c o nfig ura tio n o f the slo pe sho uld no t b e a lte re d witho ut prio r c o nsulta tio n with a pro fe ssio na l q ua lifie d g e o te c hnic a l e ng ine e r a nd a ppro va l fro m the a ppro pria te a utho ritie s.
Appro pria te sa fe ty fe nc ing sho uld b e insta lle d a nd ma inta ine d ne a r the slo pe c re st in the a re a s o f slo pe fa ilure s, o ve r- ste e pe ne d a nd ne a r ve rtic a l sc a rps to ke e p
g e o te c hnic a l e ng ine e r a nd ma nda te d re g ula to ry a g e nc ie s.
T
he pro pe rty use sho uld b e c o nduc te d in a ma nne r whic h do e s no t re sult in surfa c e e ro sio n o f the slo pe .
I
t is impe ra tive tha t a ny sig ns o f slo pe insta b ility a re b ro ug ht to the imme dia te a tte ntio n o f the ABCA a nd the munic ipa lity.
All a ppro va ls a nd pe rmits must b e se c ure d fro m a pplic a b le re g ula to ry a utho ritie s prio r to
a ny site c o nstruc tio n.
T
he c o nfig ura tio n o f the slo pe sho uld no t b e a lte re d witho ut prio r c o nsulta tio n with a pro fe ssio na l q ua lifie d g e o te c hnic a l e ng ine e r a nd a ppro va l fro m the a ppro pria te a utho ritie s.
Appro pria te sa fe ty fe nc ing sho uld b e insta lle d a nd ma inta ine d ne a r the slo pe c re st in the a re a s o f slo pe fa ilure s, o ve r- ste e pe ne d a nd ne a r ve rtic a l sc a rps to ke e p
g e o te c hnic a l e ng ine e r a nd ma nda te d re g ula to ry a g e nc ie s.
T
he pro pe rty use sho uld b e c o nduc te d in a ma nne r whic h do e s no t re sult in surfa c e e ro sio n o f the slo pe .
I
n pa rtic ula r, site g ra ding a nd dra ina g e sho uld pre ve nt dire c t c o nc e ntra te d o r c ha nne lize d surfa c e runo ff fro m flo wing dire c tly o ve r the slo pe .
Wa te r dra ina g e fro m do wn-spo uts, sumps, swimming po o ls, ro a d dra ina g e , a nd the like ,
sho uld no t b e pe rmitte d to flo w o ve r the slo pe , b ut a mino r she e t flo w ma y b e a c c e pta b le .
I
n o rde r to pro mo te ve g e ta tio n g ro wth o n the slo pe fa c e , ya rd a nd o the r wa ste must no t b e disc a rde d o ve r the slo pe .
A te mpo ra ry silt fe nc e sho uld b e e re c te d a nd ma inta ine d a ro und o r do wnside o f a ny
wo rk a re a during c o nstruc tio n a s a ppro ve d b y re g ula to ry a g e nc ie s.
Co o rdina tio n with a dja c e nt pro pe rtie s to e limina te impo sing a ny impa c ts o n ne ig hb o ring
pro pe rtie s is e xtre me ly impo rta nt.
I
n pa rtic ula r, site g ra ding a nd dra ina g e sho uld pre ve nt dire c t c o nc e ntra te d o r c ha nne lize d surfa c e runo ff fro m flo wing dire c tly o ve r the slo pe .
Wa te r dra ina g e fro m do wn-spo uts, sumps, swimming po o ls, ro a d dra ina g e , a nd the like ,
sho uld no t b e pe rmitte d to flo w o ve r the slo pe , b ut a mino r she e t flo w ma y b e a c c e pta b le .
I
n o rde r to pro mo te ve g e ta tio n g ro wth o n the slo pe fa c e , ya rd a nd o the r wa ste must no t b e disc a rde d o ve r the slo pe .
A te mpo ra ry silt fe nc e sho uld b e e re c te d a nd ma inta ine d a ro und o r do wnside o f a ny
wo rk a re a during c o nstruc tio n a s a ppro ve d b y re g ula to ry a g e nc ie s.
Co o rdina tio n with a dja c e nt pro pe rtie s to e limina te impo sing a ny impa c ts o n ne ig hb o ring
pro pe rtie s is e xtre me ly impo rta nt.
I
ssue s re la ting to rive r dre dg ing in lo c a tio ns:
Po rt F
ra nks
Gra nd Be nd Ba yfie ld Sma ll Cre e k Outle ts
I
ssue s re la ting to rive r dre dg ing in lo c a tio ns:
Po rt F
ra nks
Gra nd Be nd Ba yfie ld Sma ll Cre e k Outle ts
T he a re a o f c o nc e rn is c urre ntly b e ing pro pe lle r wa she d e ve ry, 2 to 3 time s a we e k. T his pro c e ss is no t a de e p dre dg ing a c tivity - a la ye r o f se dime nt is b lo wn o ff the unde rwa te r surfa c e b y the pro pe lle r. T he a re a o f c o nc e rn is c urre ntly b e ing pro pe lle r wa she d e ve ry, 2 to 3 time s a we e k. T his pro c e ss is no t a de e p dre dg ing a c tivity - a la ye r o f se dime nt is b lo wn o ff the unde rwa te r surfa c e b y the pro pe lle r.
Ge ne ra l re c o mme nda tio n to dire c t the ma te ria l to the so uth side o f the mo uth o f the rive r,
in this wa y the se dime nt wo uld a ssist in pro viding ma te ria l fo r the pro pe rtie s a lo ng this se c tio n who se o wne rs fe e l the y a re e xpe rie nc ing re duc e d ma te ria ls o n the ir b e a c h
Ge ne ra l re c o mme nda tio n to dire c t the ma te ria l to the so uth side o f the mo uth o f the rive r,
in this wa y the se dime nt wo uld a ssist in pro viding ma te ria l fo r the pro pe rtie s a lo ng this se c tio n who se o wne rs fe e l the y a re e xpe rie nc ing re duc e d ma te ria ls o n the ir b e a c h
Re c o mme nda tio n: a ny dre dg e d ma te ria ls sho uld b e re turne d to the syste m o n the do wndrift/ sha do w side o f the c re e k o r rive r mo uth. T he do wndrift/ sha do w side is o n the rig ht ha nd side o f the rive r mo uth. Re c o mme nda tio n: a ny dre dg e d ma te ria ls sho uld b e re turne d to the syste m o n the do wndrift/ sha do w side o f the c re e k o r rive r mo uth. T he do wndrift/ sha do w side is o n the rig ht ha nd side o f the rive r mo uth.
T he b e a c h is b uilt up o n the updrift- (L e ft ha nd side )side o f the rive r mo uth. T he b e a c h is b uilt up o n the updrift- (L e ft ha nd side )side o f the rive r mo uth.
Re c o mme nda tio n: Any dre dg e d ma te ria ls sho uld b e re turne d to the syste m o n the do wndrift/ sha do w side o f the rive r mo uth. Re c o mme nda tio n: Any dre dg e d ma te ria ls sho uld b e re turne d to the syste m o n the do wndrift/ sha do w side o f the rive r mo uth.
E
a c h individua l site sho uld b e e xa mine d b y a q ua lifie d c o a sta l e ng ine e r o r g e o mo rpho lo g ist to de te rmine a ppro pria te site spe c ific re c o mme nda tio ns.
I
n g e ne ra l ho we ve r, a ny dre dg e d ma te ria ls sho uld b e re turne d to the syste m o n the do wndrift/ sha do w side o f the c re e k o r rive r mo uth.
E
a c h individua l site sho uld b e e xa mine d b y a q ua lifie d c o a sta l e ng ine e r o r g e o mo rpho lo g ist to de te rmine a ppro pria te site spe c ific re c o mme nda tio ns.
I
n g e ne ra l ho we ve r, a ny dre dg e d ma te ria ls sho uld b e re turne d to the syste m o n the do wndrift/ sha do w side o f the c re e k o r rive r mo uth.
De fe nsib le po lic y/ po sitio n o n sho re line pro te c tio n wo rks L
Pe rmit no ne ? Pe rmit so me ? Pe rmit a ll? Ha ve a diffe re nt a ppro a c h fo r c o nstruc tio n o f ne w wo rks a nd re pa ir o f e xisting ?
De fe nsib le po lic y/ po sitio n o n sho re line pro te c tio n wo rks L
Pe rmit no ne ? Pe rmit so me ? Pe rmit a ll? Ha ve a diffe re nt a ppro a c h fo r c o nstruc tio n o f ne w wo rks a nd re pa ir o f e xisting ?
Re c e ssio n Ra te s a lo ng ABCA Co he sive Bluff Sho re line hig hly va ria b le Ra ng e fro m lo w to mo de ra te a nd to sub sta ntia l in so me a re a s Muc h o f sho re line use d b y “c o tta g e rs” situa te d o n to p o f b luff – usua lly 1 ro w o f c o tta g e s,
Orig ina lly se t b a c k fro m b luff c re st b ut ma ny o lde r sub divisio ns no w ha ve dwe lling s within
3:1 slo pe limit – so me ha ve b e e n lo st
Ove r la st 4-5 de c a de s ma ny pro pe rty o wne rs ha ve put in so me fo rm o f ha rd sho re
pro te c tio n
Wide ra ng e o f struc ture s – ra ng ing fro m rub b le to wo o d, b lo c k o r ste e l she e t pile se a wa lls,
to g ro yne s
Co mmo n in Gre a t L
a ke s (US a nd Ca na da ) b ut unusua l wo rld wide
Re c e ssio n Ra te s a lo ng ABCA Co he sive Bluff Sho re line hig hly va ria b le Ra ng e fro m lo w to mo de ra te a nd to sub sta ntia l in so me a re a s Muc h o f sho re line use d b y “c o tta g e rs” situa te d o n to p o f b luff – usua lly 1 ro w o f c o tta g e s,
Orig ina lly se t b a c k fro m b luff c re st b ut ma ny o lde r sub divisio ns no w ha ve dwe lling s within
3:1 slo pe limit – so me ha ve b e e n lo st
Ove r la st 4-5 de c a de s ma ny pro pe rty o wne rs ha ve put in so me fo rm o f ha rd sho re
pro te c tio n
Wide ra ng e o f struc ture s – ra ng ing fro m rub b le to wo o d, b lo c k o r ste e l she e t pile se a wa lls,
to g ro yne s
Co mmo n in Gre a t L
a ke s (US a nd Ca na da ) b ut unusua l wo rld wide
E
ro sio n a nd Bluff re c e ssio n is a ha za rd to huma n life a nd pro pe rtie s – simila r to o the r na tura l ha za rds suc h a s hurric a ne s, flo o ding a nd vo lc a nic e ruptio ns
Co a sta l e ro sio n in a na tura l pro c e ss – ne ithe r g o o d no r b a d – a nd the sho re line do e s no t ne e d ‘ pro te c tio n’ fro m it a ny mo re tha n a rive r flo o dpla in ne e ds pro te c tio n a g a inst flo o ds
Sho re Pro te c tio n Struc ture s a re a ha rd e ng ine e ring re spo nse to the impa c t o f b luff
re c e ssio n o n huma n a c tivitie s - b ut a s with o the r fo rms o f na tura l ha za rd, the re a re a ra ng e
a va ila b le o n ho w to a sse ss the m a nd to de ve lo p the b e st a ppro a c h fo r a pa rtic ula r re g io n.
E
ro sio n a nd Bluff re c e ssio n is a ha za rd to huma n life a nd pro pe rtie s – simila r to o the r na tura l ha za rds suc h a s hurric a ne s, flo o ding a nd vo lc a nic e ruptio ns
Co a sta l e ro sio n in a na tura l pro c e ss – ne ithe r g o o d no r b a d – a nd the sho re line do e s no t ne e d ‘ pro te c tio n’ fro m it a ny mo re tha n a rive r flo o dpla in ne e ds pro te c tio n a g a inst flo o ds
Sho re Pro te c tio n Struc ture s a re a ha rd e ng ine e ring re spo nse to the impa c t o f b luff
re c e ssio n o n huma n a c tivitie s - b ut a s with o the r fo rms o f na tura l ha za rd, the re a re a ra ng e
a va ila b le o n ho w to a sse ss the m a nd to de ve lo p the b e st a ppro a c h fo r a pa rtic ula r re g io n.
De ve lo pme nt o f Onta rio Gre a t L
a ke s Po lic y a nd T e c hnic a l Guide line s in e a rly 1990s – re g ula tio n b y CAs
Re c o g nitio n o f ha za rd o n e ro ding c o he sive b luff sho re s – se tb a c k fo r a ll ne w de ve lo pme nt inc luding a llo wa nc e fo r sta b le slo pe a nd e ro sio n o ve r 100 ye a rs – a ssume d life spa n o f struc ture
Unde rlying a ssumptio n o f no pro te c tio n a nd ‘ ma na g e d re tre a t’ fo r ne w de ve lo pme nt Co ntinue d a llo wa nc e o f pro te c tio n fo r e xisting struc ture s in pa rt b e c a use o f unc e rta inty o ve r
ne e d to c o nside r e nviro nme nta l impa c ts a nd o f ho w to de a l with e xisting b uilding s a nd sho re pro te c tio n
Upda te d a nd e xpa nde d po lic y a nd ma nda te fo r CAs must b e inc o rpo ra te d in re vise d SMP fo r
ABCA
I
nc luding a sse ssme nt o f a ddre ssing the ha za rd o n c o he sive sho re line a nd in pa rtic ula r the use
De ve lo pme nt o f Onta rio Gre a t L
a ke s Po lic y a nd T e c hnic a l Guide line s in e a rly 1990s – re g ula tio n b y CAs
Re c o g nitio n o f ha za rd o n e ro ding c o he sive b luff sho re s – se tb a c k fo r a ll ne w de ve lo pme nt inc luding a llo wa nc e fo r sta b le slo pe a nd e ro sio n o ve r 100 ye a rs – a ssume d life spa n o f struc ture
Unde rlying a ssumptio n o f no pro te c tio n a nd ‘ ma na g e d re tre a t’ fo r ne w de ve lo pme nt Co ntinue d a llo wa nc e o f pro te c tio n fo r e xisting struc ture s in pa rt b e c a use o f unc e rta inty o ve r
ne e d to c o nside r e nviro nme nta l impa c ts a nd o f ho w to de a l with e xisting b uilding s a nd sho re pro te c tio n
Upda te d a nd e xpa nde d po lic y a nd ma nda te fo r CAs must b e inc o rpo ra te d in re vise d SMP fo r
ABCA
I
nc luding a sse ssme nt o f a ddre ssing the ha za rd o n c o he sive sho re line a nd in pa rtic ula r the use
We ha ve a sse sse d the ra ng e o f re spo nse s to b luff re c e ssio n in the ABCA jurisdic tio n in lig ht
a nd the lite ra ture o n ha za rds g e ne ra lly a nd c o a sta l e ro sio n in pa rtic ula r
Our c o nc lusio ns a re :
1. Ha rd sho re pro te c tio n struc ture s put in pla c e a nd ma inta ine d b y priva te pro pe rty o wne rs sho uld no lo ng e r b e pe rmitte d; 2. Ha rd sho re pro te c tio n struc ture s ma y b e use d, if a ppro pria te , within the ma in urb a n c e ntre s o f Gra nd Be nd a nd Ba yfie ld . T he se will b e c o nstruc te d a nd ma inta ine d b y the munic ipa lity a nd/ o r c o unty to pro te c t pub lic , c o mme rc ia l a nd priva te pro pe rty within tho se urb a n limits. Ha rd struc ture s ma y a lso b e use d o utside Gra nd Be nd a nd Ba yfie ld to pro te c t munic ipa l infra struc ture tha t ha s to b e lo c a te d c lo se to the sho re line . I n a ll c a se s the struc ture s must b e de sig ne d a nd c o nstruc tio n supe rvise d b y a q ua lifie d c o a sta l e ng ine e r fo llo wing a n a ppro pria te study o f a lte rna tive me a sure s a nd po te ntia l e nviro nme nta l impa c ts. 3. So ft sho re pro te c tio n , suc h a s b e a c h no urishme nt, e nha nc e me nt o f c o a sta l dune s a nd slo pe sta b ilisa tio n, ma y b e use d b y priva te pro pe rty o wne rs sub je c t to a ppro va l b y the ABCA
We ha ve a sse sse d the ra ng e o f re spo nse s to b luff re c e ssio n in the ABCA jurisdic tio n in lig ht
a nd the lite ra ture o n ha za rds g e ne ra lly a nd c o a sta l e ro sio n in pa rtic ula r
Our c o nc lusio ns a re :
1. Ha rd sho re pro te c tio n struc ture s put in pla c e a nd ma inta ine d b y priva te pro pe rty o wne rs sho uld no lo ng e r b e pe rmitte d; 2. Ha rd sho re pro te c tio n struc ture s ma y b e use d, if a ppro pria te , within the ma in urb a n c e ntre s o f Gra nd Be nd a nd Ba yfie ld . T he se will b e c o nstruc te d a nd ma inta ine d b y the munic ipa lity a nd/ o r c o unty to pro te c t pub lic , c o mme rc ia l a nd priva te pro pe rty within tho se urb a n limits. Ha rd struc ture s ma y a lso b e use d o utside Gra nd Be nd a nd Ba yfie ld to pro te c t munic ipa l infra struc ture tha t ha s to b e lo c a te d c lo se to the sho re line . I n a ll c a se s the struc ture s must b e de sig ne d a nd c o nstruc tio n supe rvise d b y a q ua lifie d c o a sta l e ng ine e r fo llo wing a n a ppro pria te study o f a lte rna tive me a sure s a nd po te ntia l e nviro nme nta l impa c ts. 3. So ft sho re pro te c tio n , suc h a s b e a c h no urishme nt, e nha nc e me nt o f c o a sta l dune s a nd slo pe sta b ilisa tio n, ma y b e use d b y priva te pro pe rty o wne rs sub je c t to a ppro va l b y the ABCA
Co nside re d a numb e r o f issue s within the c o nte xt o f “Ma na g ing Re spo nsib ly” a nd o f e nsuring
tha t no ne w ha za rds a re c re a te d, e xisting ha za rds a re no t a g g ra va te d, a nd a dve rse e nviro nme nta l impa c ts do no t re sult:
1. Ho w e ffe c tive a re priva te sho re pro te c tio n struc ture s in slo wing o r sto pping e ro sio n? 2. Wha t is the typic a l Be ne fit/ Co st ra tio fo r priva te sho re pro te c tio n? 3. I s the re a ny re q uire me nt fo r a priva te la nd o wne r to put sho re pro te c tio n in pla c e o r to ma inta in a struc ture o nc e it is put in pla c e ? 4. Are the re po te ntia l a dve rse impa c ts o n the b e a c h a nd o n pro pe rtie s in the imme dia te vic inity? 5. Are the re le g a l implic a tio n s fo r the ABCA in the e ve nt tha t a n a ppro ve d struc ture do e s ha ve a n a dve rse impa c t e .g . o n a n a dja c e nt pro pe rty? 6. Are the re po te ntia l a dve rse impa c ts o n the do wndrift c o a st? 7. Wha t a re the po te ntia l c umula tive / c o lle c tive impa c ts o f a llo wing individua l ha rd sho re pro te c tio n?
Co nside re d a numb e r o f issue s within the c o nte xt o f “Ma na g ing Re spo nsib ly” a nd o f e nsuring
tha t no ne w ha za rds a re c re a te d, e xisting ha za rds a re no t a g g ra va te d, a nd a dve rse e nviro nme nta l impa c ts do no t re sult:
1. Ho w e ffe c tive a re priva te sho re pro te c tio n struc ture s in slo wing o r sto pping e ro sio n? 2. Wha t is the typic a l Be ne fit/ Co st ra tio fo r priva te sho re pro te c tio n? 3. I s the re a ny re q uire me nt fo r a priva te la nd o wne r to put sho re pro te c tio n in pla c e o r to ma inta in a struc ture o nc e it is put in pla c e ? 4. Are the re po te ntia l a dve rse impa c ts o n the b e a c h a nd o n pro pe rtie s in the imme dia te vic inity? 5. Are the re le g a l implic a tio n s fo r the ABCA in the e ve nt tha t a n a ppro ve d struc ture do e s ha ve a n a dve rse impa c t e .g . o n a n a dja c e nt pro pe rty? 6. Are the re po te ntia l a dve rse impa c ts o n the do wndrift c o a st? 7. Wha t a re the po te ntia l c umula tive / c o lle c tive impa c ts o f a llo wing individua l ha rd sho re pro te c tio n?
Ha rd sho re pro te c tio n struc ture s wo rk b e st whe n the y a re de sig ne d b y a c o a sta l e ng ine e r
fo r the pa rtic ula r c o a sta l c o nditio ns, c o nstruc te d o f unifo rm ma te ria ls, a re c o ntinuo us a lo ng sho re a nd pro pe rly tie d in
Priva te sho re pro te c tio n a lo ng the ABCA c o a st g e ne ra lly do e s no t me e t a ny o f the se
c rite ria . T he y a re o fte n unsuite d fo r the e nviro nme nta l c o nditio ns, a re put in a t diffe re nt time s, va ry in ma te ria ls a nd c o nstruc tio n, a re po o rly tie d in a lo ng sho re a nd to the b a se o f the b luff, a nd thus the ir life spa n is sho rte ne d b e c a use o f fa ilure o f the struc ture s during sto rms a nd/ o r fa ilure o f a dja c e nt pro te c tio n.
Ha rd sho re pro te c tio n struc ture s wo rk b e st whe n the y a re de sig ne d b y a c o a sta l e ng ine e r
fo r the pa rtic ula r c o a sta l c o nditio ns, c o nstruc te d o f unifo rm ma te ria ls, a re c o ntinuo us a lo ng sho re a nd pro pe rly tie d in
Priva te sho re pro te c tio n a lo ng the ABCA c o a st g e ne ra lly do e s no t me e t a ny o f the se
c rite ria . T he y a re o fte n unsuite d fo r the e nviro nme nta l c o nditio ns, a re put in a t diffe re nt time s, va ry in ma te ria ls a nd c o nstruc tio n, a re po o rly tie d in a lo ng sho re a nd to the b a se o f the b luff, a nd thus the ir life spa n is sho rte ne d b e c a use o f fa ilure o f the struc ture s during sto rms a nd/ o r fa ilure o f a dja c e nt pro te c tio n.
Priva te sho re pro te c tio n is o fte n po o rly ma inta ine d b e twe e n hig h la ke le ve l pe rio ds so is
vulne ra b le whe n the re is a sudde n rise in la ke le ve l a s o c c urre d in 2015. I n a dditio n, it is
during lo w la ke le ve ls a nd is sub je c t to o ve rto pping b y wa ve s
Priva te sho re pro te c tio n is o fte n po o rly ma inta ine d b e twe e n hig h la ke le ve l pe rio ds so is
vulne ra b le whe n the re is a sudde n rise in la ke le ve l a s o c c urre d in 2015. I n a dditio n, it is
during lo w la ke le ve ls a nd is sub je c t to o ve rto pping b y wa ve s
Ong o ing do wnc utting in the ne a rsho re re sults in struc ture s b e ing sub je c te d to g re a te r wa ve
a tta c k a nd e ro sio n o f fo unda tio ns o ve r time . Ve rtic a l se a wa lls a re pa rtic ula rly vulne ra b le to b o th o ve rto pping a nd e ro sio n o f the fo unda tio n a s a re sult
Pra c tic e in the Gre a t L
a ke s ha s sho wn tha t the mo st dura b le a nd e ffe c tive struc ture is a n a rmo ursto ne re ve tme nt whic h ha s a rmo ursto ne e xte nding o nto the ne a rsho re pro file
T
he se struc ture s c o st $4-6 millio n do lla rs pe r kilo me tre to c o nstruc t
Ong o ing do wnc utting in the ne a rsho re re sults in struc ture s b e ing sub je c te d to g re a te r wa ve
a tta c k a nd e ro sio n o f fo unda tio ns o ve r time . Ve rtic a l se a wa lls a re pa rtic ula rly vulne ra b le to b o th o ve rto pping a nd e ro sio n o f the fo unda tio n a s a re sult
Pra c tic e in the Gre a t L
a ke s ha s sho wn tha t the mo st dura b le a nd e ffe c tive struc ture is a n a rmo ursto ne re ve tme nt whic h ha s a rmo ursto ne e xte nding o nto the ne a rsho re pro file
T
he se struc ture s c o st $4-6 millio n do lla rs pe r kilo me tre to c o nstruc t
1980 2014
All ma jo r sho re pro te c tio n wo rks a re typic a lly re q uire d to unde rg o a fo rma l Co nse rvatio n Ontario Class E nviro nme ntal Asse ssme nt fo r Re me dial F lo o d and E ro sio n Co ntro l Pro je c ts (Cla ss
E A) whic h wo uld re q uire a full a sse ssme nt o f a ll po te ntia l me a sure s, the ir po te ntia l e nviro nme nta l impa c t a nd a n e xa mina tio n o f the b e ne fit/ c o st ra tio a sso c ia te d with e a c h.
While the sc a le o f sho re pro te c tio n a sso c ia te d with individua l pro pe rtie s is to o sma ll to wa rra nt
this, the c umula tive impa c ts o f g ra nting pe rmissio n to c o nstruc t sho re pro te c tio n o ve r e xte nsive a re a s o f the sho re line is c o mpa ra b le to a ve ry la rg e pro je c t a nd a s suc h re q uire s so me a sse ssme nt o f the b e ne fit/ c o st ra tio
Suc h a c a lc ula tio n wo uld no rma lly inc lude the c o sts a sso c ia te d with studie s o f the site a nd
pro c e sse s a ffe c ting it, the de sig n a nd c o nstruc tio n o f the struc ture , a nd the c o st o f ma inta ining the struc ture o ve r its life spa n. Additio na lly, so me c o sting o f the po te ntia l e nviro nme nta l impa c ts wo uld b e inc lude d a nd so me o f the se impa c ts mig ht pro hib it c o nstruc tio n a lto g e the r
I
n the c a se o f mo st priva te sho re pro te c tio n struc ture s no fo rma l b e ne fit/ c o st a sse ssme nt is unde rta ke n a nd ve ry fe w o f the m inc lude a fo rma l de sig n a nd c o sting b y a q ua lifie d c o a sta l e ng ine e r. I n g e ne ra l o n a la rg e ly rura l c o a st suc h a s this it is like ly tha t the ra tio , e ve n witho ut a sse ssme nt o f e nviro nme nta l impa c ts is to o sma ll to suppo rt c o nstruc tio n.
All ma jo r sho re pro te c tio n wo rks a re typic a lly re q uire d to unde rg o a fo rma l Co nse rvatio n Ontario Class E nviro nme ntal Asse ssme nt fo r Re me dial F lo o d and E ro sio n Co ntro l Pro je c ts (Cla ss
E A) whic h wo uld re q uire a full a sse ssme nt o f a ll po te ntia l me a sure s, the ir po te ntia l e nviro nme nta l impa c t a nd a n e xa mina tio n o f the b e ne fit/ c o st ra tio a sso c ia te d with e a c h.
While the sc a le o f sho re pro te c tio n a sso c ia te d with individua l pro pe rtie s is to o sma ll to wa rra nt
this, the c umula tive impa c ts o f g ra nting pe rmissio n to c o nstruc t sho re pro te c tio n o ve r e xte nsive a re a s o f the sho re line is c o mpa ra b le to a ve ry la rg e pro je c t a nd a s suc h re q uire s so me a sse ssme nt o f the b e ne fit/ c o st ra tio
Suc h a c a lc ula tio n wo uld no rma lly inc lude the c o sts a sso c ia te d with studie s o f the site a nd
pro c e sse s a ffe c ting it, the de sig n a nd c o nstruc tio n o f the struc ture , a nd the c o st o f ma inta ining the struc ture o ve r its life spa n. Additio na lly, so me c o sting o f the po te ntia l e nviro nme nta l impa c ts wo uld b e inc lude d a nd so me o f the se impa c ts mig ht pro hib it c o nstruc tio n a lto g e the r
I
n the c a se o f mo st priva te sho re pro te c tio n struc ture s no fo rma l b e ne fit/ c o st a sse ssme nt is unde rta ke n a nd ve ry fe w o f the m inc lude a fo rma l de sig n a nd c o sting b y a q ua lifie d c o a sta l e ng ine e r. I n g e ne ra l o n a la rg e ly rura l c o a st suc h a s this it is like ly tha t the ra tio , e ve n witho ut a sse ssme nt o f e nviro nme nta l impa c ts is to o sma ll to suppo rt c o nstruc tio n.
T
he ABCA c a nno t re q uire a ny pro pe rty o wne r to put in sho re pro te c tio n o r pa rtic ipa te in a g ro up se e king to do this. T his ma ke s it diffic ult to g e t the a lo ng sho re c o ntinuity ne c e ssa ry to e nha nc e the de sig n a nd dura b ility o f struc ture s.
T
he ABCA c a nno t e nfo rc e ma inte na nc e o f e xisting struc ture s whic h ma y b e ne c e ssa ry to e nha nc e the ir dura b ility a nd the le ve l o f pro te c tio n pro vide d
T
he ABCA c a nno t re q uire a ny pro pe rty o wne r to put in sho re pro te c tio n o r pa rtic ipa te in a g ro up se e king to do this. T his ma ke s it diffic ult to g e t the a lo ng sho re c o ntinuity ne c e ssa ry to e nha nc e the de sig n a nd dura b ility o f struc ture s.
T
he ABCA c a nno t e nfo rc e ma inte na nc e o f e xisting struc ture s whic h ma y b e ne c e ssa ry to e nha nc e the ir dura b ility a nd the le ve l o f pro te c tio n pro vide d 2014
T he pre se nc e o f struc ture s c a n ha ve two fo rms o f impa c t o n a dja c e nt pro pe rtie s: 1. Updrift struc ture s c a n inc re a se e ro sio n o n the a dja c e nt do wndrift pro pe rty b y re fra c tio n o f wa ve s a ro und ve rtic a l struc ture s whe ne ve r the struc ture s a re sub je c t to wa ve a tta c k. Bo th ve rtic a l struc ture s a nd g ro yne s c a n dive rt se dime nt a wa y fro m the do wndrift a dja c e nt pro pe rty thus re duc ing the pro te c tive b e a c h c o ve r; 2. During pe rio ds o f hig h la ke le ve l wa te r ma y re a c h the b a se o f ve rtic a l struc ture a nd re fle c tio n fro m the struc ture e nha nc e s the de pth o f wa te r in fro nt o f the struc ture . As a re sult the a me nity pro vide d b y the pre se nc e o f a b e a c h is a ffe c te d sinc e it is no lo ng e r po ssib le to ‘ wa lk the b e a c h’ . Be c a use o f o ng o ing unde rwa te r e ro sio n the se pe rio d o c c ur e ve n during mo de ra te to lo w la ke le ve l in so me lo c a tio ns.
T he pre se nc e o f struc ture s c a n ha ve two fo rms o f impa c t o n a dja c e nt pro pe rtie s: 1. Updrift struc ture s c a n inc re a se e ro sio n o n the a dja c e nt do wndrift pro pe rty b y re fra c tio n o f wa ve s a ro und ve rtic a l struc ture s whe ne ve r the struc ture s a re sub je c t to wa ve a tta c k. Bo th ve rtic a l struc ture s a nd g ro yne s c a n dive rt se dime nt a wa y fro m the do wndrift a dja c e nt pro pe rty thus re duc ing the pro te c tive b e a c h c o ve r; 2. During pe rio ds o f hig h la ke le ve l wa te r ma y re a c h the b a se o f ve rtic a l struc ture a nd re fle c tio n fro m the struc ture e nha nc e s the de pth o f wa te r in fro nt o f the struc ture . As a re sult the a me nity pro vide d b y the pre se nc e o f a b e a c h is a ffe c te d sinc e it is no lo ng e r po ssib le to ‘ wa lk the b e a c h’ . Be c a use o f o ng o ing unde rwa te r e ro sio n the se pe rio d o c c ur e ve n during mo de ra te to lo w la ke le ve l in so me lo c a tio ns.
M1
I f la rg e stre tc he s o f the c o he sive c o a st ha ve sho re pro te c tio n this re duc e s the o ve ra ll supply o f sa nd a nd g ra ve l to b e a c he s do wndrift. T his ma y le a d to a de c re a se in b e a c h width a nd the thic kne ss o f se dime nt in the ne a rsho re thus e nha nc ing e ro sio n o f the b luff to e a nd do wnc utting o f the ne a rsho re in a re a s whe re se dime nt c o ve r is re spo nsib le fo r re la tive ly lo w re c e ssio n
I t ma y a lso ha ve the e ffe c t o f re duc ing the size o f the file t b e a c he s a t Ba yfie ld a nd Gra nd Be nd so tha t so me a re a s tha t c urre ntly ha ve no e ro sio n ma y switc h to b e ing e ro sio na l
I t ma y a lso ha ve a n impa c t o n the o ve ra ll sta b ility o f the ma jo r Pine ry sa nd dune c o a st.
I f la rg e stre tc he s o f the c o he sive c o a st ha ve sho re pro te c tio n this re duc e s the o ve ra ll supply o f sa nd a nd g ra ve l to b e a c he s do wndrift. T his ma y le a d to a de c re a se in b e a c h width a nd the thic kne ss o f se dime nt in the ne a rsho re thus e nha nc ing e ro sio n o f the b luff to e a nd do wnc utting o f the ne a rsho re in a re a s whe re se dime nt c o ve r is re spo nsib le fo r re la tive ly lo w re c e ssio n
I t ma y a lso ha ve the e ffe c t o f re duc ing the size o f the file t b e a c he s a t Ba yfie ld a nd Gra nd Be nd so tha t so me a re a s tha t c urre ntly ha ve no e ro sio n ma y switc h to b e ing e ro sio na l
I t ma y a lso ha ve a n impa c t o n the o ve ra ll sta b ility o f the ma jo r Pine ry sa nd dune c o a st.
1980 2014
All ma jo r sho re pro te c tio n wo rks a re typic a lly re q uire d to unde rg o a fo rma l Co nse rva tio n
Onta rio Cla ss E nviro nme nta l Asse ssme nt fo r Re me dia l F lo o d a nd E ro sio n Co ntro l Pro je c ts (Cla ss E A) whic h wo uld re q uire a full a sse ssme nt o f a ll po te ntia l me a sure s, the ir po te ntia l e nviro nme nta l impa c t a nd a n e xa mina tio n o f the b e ne fit/ c o st ra tio a sso c ia te d with e a c h.
While e a c h individua l sho re pro te c tio n struc ture is sma ll the to ta l le ng th o f sho re line
a lre a dy pro te c te d is se ve ra l km whic h a dds up to a sig nific a nt po rtio n o f the sho re line . L a rg e e no ug h tha t it sho uld trig g e r a full E
n the a b se nc e o f this, c a n the ABCA c o ntinue to pe rmit a ll pro pe rty o wne rs to ha ve the o ppo rtunity to pro te c t the sho re line in fro nt o f the ir pro pe rty witho ut pro pe r a sse ssme nt.
All ma jo r sho re pro te c tio n wo rks a re typic a lly re q uire d to unde rg o a fo rma l Co nse rva tio n
Onta rio Cla ss E nviro nme nta l Asse ssme nt fo r Re me dia l F lo o d a nd E ro sio n Co ntro l Pro je c ts (Cla ss E A) whic h wo uld re q uire a full a sse ssme nt o f a ll po te ntia l me a sure s, the ir po te ntia l e nviro nme nta l impa c t a nd a n e xa mina tio n o f the b e ne fit/ c o st ra tio a sso c ia te d with e a c h.
While e a c h individua l sho re pro te c tio n struc ture is sma ll the to ta l le ng th o f sho re line
a lre a dy pro te c te d is se ve ra l km whic h a dds up to a sig nific a nt po rtio n o f the sho re line . L a rg e e no ug h tha t it sho uld trig g e r a full E
n the a b se nc e o f this, c a n the ABCA c o ntinue to pe rmit a ll pro pe rty o wne rs to ha ve the o ppo rtunity to pro te c t the sho re line in fro nt o f the ir pro pe rty witho ut pro pe r a sse ssme nt.
T his is a ke y c o nside ra tio n whic h must b e fully a sse sse d with a ny pro te c tio n wo rks
T
he physic a l impa c ts a sso c ia te d with sho re line ma na g e me nt a ppro a c he s lo c a te d in
te rre stria l, a q ua tic a nd we tla nd). An a lte ra tio n o f e ro sio n a nd de po sitio n pa tte rns ma y re sult in c ha ng e s to e xisting ha b ita t a re a s.
T
he re duc tio n in a ne w supply o f surfic ia l se dime nts (e .g ., sa nd, g ra ve l, c o b b le , b o ulde rs) ma y re duc e the a mo unt a nd distrib utio n o f this sub stra te in the ne a rsho re a re a .
Struc ture s whic h o c c upy o r impa c t the ne a rsho re c a n ha ve a dire c t ne g a tive impa c t
dire c tly c o ve r the b o tto m sub stra te . T his c a n re sult in the dire c t lo ss o f fish ha b ita t.
A numb e r o f o the r impa c ts a re disc usse d in the Dra ft Upda te d SMP
T his is a ke y c o nside ra tio n whic h must b e fully a sse sse d with a ny pro te c tio n wo rks
T
he physic a l impa c ts a sso c ia te d with sho re line ma na g e me nt a ppro a c he s lo c a te d in
te rre stria l, a q ua tic a nd we tla nd). An a lte ra tio n o f e ro sio n a nd de po sitio n pa tte rns ma y re sult in c ha ng e s to e xisting ha b ita t a re a s.
T
he re duc tio n in a ne w supply o f surfic ia l se dime nts (e .g ., sa nd, g ra ve l, c o b b le , b o ulde rs) ma y re duc e the a mo unt a nd distrib utio n o f this sub stra te in the ne a rsho re a re a .
Struc ture s whic h o c c upy o r impa c t the ne a rsho re c a n ha ve a dire c t ne g a tive impa c t
dire c tly c o ve r the b o tto m sub stra te . T his c a n re sult in the dire c t lo ss o f fish ha b ita t.
A numb e r o f o the r impa c ts a re disc usse d in the Dra ft Upda te d SMP
F
xisting a nd Ne w De ve lo pme nt F
xisting a nd Ne w De ve lo pme nt
T he y a re b e yo nd the sc o pe o f this study ho we ve r the y o ffe r a n impo rta nt fo c us fo r future a c tio n. T he y a re b e yo nd the sc o pe o f this study ho we ve r the y o ffe r a n impo rta nt fo c us fo r future a c tio n.
1. ABCA c o nside r the de ve lo pme nt o f a n Applic a nt’ s Guide to e xpla in the pe rmitting pro c e ss a nd the re g ula to ry re spo nsib ilitie s a ssig ne d to ABCA fo r na tura l ha za rds a lo ng the L a ke Huro n sho re line . 2. T ha t a ro ste r o f pre -a ppro ve d Ge o te c hnic a l E ng ine e rs b e de ve lo pe d b y ABCA a nd ma de a va ila b le o n the ABCA we b site fo r tho se who ma y b e inte re ste d in se c uring the se rvic e s o f a pro fe ssio na lly q ua lifie d Ge o te c hnic a l E ng ine e r. 3. ABCA e nte r into a n a g re e me nt with pro fe ssio na l q ua lifie d Ge o te c hnic a l E ng ine e rs who c o uld re spo nd imme dia te ly in the e ve nt o f a n e me rg e nc y situa tio n. I t is furthe r re c o mme nde d tha t ABCA c o nside r the a ppro a c h tha t ha s b e e n a do pte d b y Ma itla nd Va lle y CA in this re g a rd. 1. ABCA c o nside r the de ve lo pme nt o f a n Applic a nt’ s Guide to e xpla in the pe rmitting pro c e ss a nd the re g ula to ry re spo nsib ilitie s a ssig ne d to ABCA fo r na tura l ha za rds a lo ng the L a ke Huro n sho re line . 2. T ha t a ro ste r o f pre -a ppro ve d Ge o te c hnic a l E ng ine e rs b e de ve lo pe d b y ABCA a nd ma de a va ila b le o n the ABCA we b site fo r tho se who ma y b e inte re ste d in se c uring the se rvic e s o f a pro fe ssio na lly q ua lifie d Ge o te c hnic a l E ng ine e r. 3. ABCA e nte r into a n a g re e me nt with pro fe ssio na l q ua lifie d Ge o te c hnic a l E ng ine e rs who c o uld re spo nd imme dia te ly in the e ve nt o f a n e me rg e nc y situa tio n. I t is furthe r re c o mme nde d tha t ABCA c o nside r the a ppro a c h tha t ha s b e e n a do pte d b y Ma itla nd Va lle y CA in this re g a rd.
4. ABCA de ve lo p a ro ste r o f spe c ia lize d c o ntra c to rs a nd q ua lifie d pro fe ssio na l c o nsulting firms who o ffe r a ra ng e o f hig hly spe c ia lize d se rvic e s inc luding c o a sta l e ng ine e ring , g e o te c hnic a l e ng ine e ring a nd c o a sta l g e o mo rpho lo g y. 5. ABCA e nsure tha t a ny E me rg e nc y Pre pa re dne ss Pla ns inc lude no tific a tio n to ripa ria n la ndo wne rs o f the ha za rds a nd risks a sso c ia te d with e xisting b uilding s a nd a c tivitie s tha t ma y b e ne g a tive ly impa c te d a s a re sult o f na tura l sho re line ha za rds inc luding flo o ding , e ro sio n a nd dyna mic b e a c h ha za rds. 6. ABCA e xplo re the o ppo rtunitie s to wo rk with o the r c o nse rva tio n a utho ritie s, Co nse rva tio n Onta rio , munic ipa l a nd pro vinc ia l pa rtne rs to e xplo re the o ptio ns a sso c ia te d with vo lunta ry re se ttle me nt inc luding fisc a l suppo rt thro ug h c o mpre he nsive pro vinc ia l funding suppo rt a nd/ o r ta x re b a te s a s we ll a s no n-fisc a l se rvic e -re la te d inc e ntive s inc luding e xpe dite d pla nning a nd pe rmitting a ppro va ls a nd the pub lic a c q uisitio n o f unsta b le sho re line a re a s fo r
4. ABCA de ve lo p a ro ste r o f spe c ia lize d c o ntra c to rs a nd q ua lifie d pro fe ssio na l c o nsulting firms who o ffe r a ra ng e o f hig hly spe c ia lize d se rvic e s inc luding c o a sta l e ng ine e ring , g e o te c hnic a l e ng ine e ring a nd c o a sta l g e o mo rpho lo g y. 5. ABCA e nsure tha t a ny E me rg e nc y Pre pa re dne ss Pla ns inc lude no tific a tio n to ripa ria n la ndo wne rs o f the ha za rds a nd risks a sso c ia te d with e xisting b uilding s a nd a c tivitie s tha t ma y b e ne g a tive ly impa c te d a s a re sult o f na tura l sho re line ha za rds inc luding flo o ding , e ro sio n a nd dyna mic b e a c h ha za rds. 6. ABCA e xplo re the o ppo rtunitie s to wo rk with o the r c o nse rva tio n a utho ritie s, Co nse rva tio n Onta rio , munic ipa l a nd pro vinc ia l pa rtne rs to e xplo re the o ptio ns a sso c ia te d with vo lunta ry re se ttle me nt inc luding fisc a l suppo rt thro ug h c o mpre he nsive pro vinc ia l funding suppo rt a nd/ o r ta x re b a te s a s we ll a s no n-fisc a l se rvic e -re la te d inc e ntive s inc luding e xpe dite d pla nning a nd pe rmitting a ppro va ls a nd the pub lic a c q uisitio n o f unsta b le sho re line a re a s fo r
Advise ABCA Bo a rd o f Dire c to rs Uplo a d to ABCA we b site Pub lic Re vie w & Co mme nt Pe rio d
Re c o mme nd a tra nspa re nt a nd a c c e ssib le pro c e ss fo r pub lic input Co mme nt pe rio d – wha t is re a so na b le ? Pub lic info rma tio n se ssio ns (2) – Aug ust 20th
Co mmunity Ne wsle tte r a nno unc ing the dra ft do c ume nt a nd its a va ila b ility Munic ipa l me e ting s? Advise ABCA Bo a rd o f Dire c to rs Uplo a d to ABCA we b site Pub lic Re vie w & Co mme nt Pe rio d
Re c o mme nd a tra nspa re nt a nd a c c e ssib le pro c e ss fo r pub lic input Co mme nt pe rio d – wha t is re a so na b le ? Pub lic info rma tio n se ssio ns (2) – Aug ust 20th
Co mmunity Ne wsle tte r a nno unc ing the dra ft do c ume nt a nd its a va ila b ility Munic ipa l me e ting s?
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ha nk Yo u So Muc h F
ime T
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ha nk Yo u So Muc h F
ime T