HomeMy WebLinkAboutCS 30-17PICKERING
Report to
Council
Report umber: GS 30-17
Date: 1)e:camber 11, 2017
From: Marisa Carpi no
Director, Community Services
Subject. Lake Front Water Damage
- information Report.
File: A-1440-17
Recommendation:
1. That Council receive Information Report GS 30-17 regarding Lake Front Water Damage.
Executive Summary: The City of Pickering experienced excessive damage and numerous
service interruptions throughout the Summer at both Beachfront Park and Rotary Frenchman's
Bay West Park_ The record high Lake Ontario water levels coupled with high spring and summer
rainfall and. wind storms contributed to oondttions that cused significant erosion, flooding and
stouren damage.
Throughout the spring and summer of 2017, TRCA continued 'to issue daily bulletins, warning of
high water levels and risks of flooding. Historically, Lake Ontario lake levels are at their highest in
the nn.onth of June and their.lowest in the month of December. In 2017, Lake Ontario peaked on
the 29 of May, at a level of -75.88 metres. This represented the highest recorded water level
since records started in 1918. This level was 3 cm above the next highest level recorded in June
1952. The average water level over the last ten years is 75,07 metres or 81 cm below this year's
high.
This information report is to inform Council of the lake front water damage.., erosion artd flooding
experienced in 2017 within the City of Pickering.
Financial implications: Public Works will continue in 2018 to respond to flood and storm
damage to keep beachfront amenities open to he public utilizing existing operating buddet,
Should the level of damage be similar to that experienced in 2017, staff may be required to seek
additional funds to the 2019 Current Budget,
Key forested capital projebts should incorporate flood and storm resilience in the design of any
vulnerable projects. For example, the 2020 Capital Forecast includes tie planned Waterfront
Splash Pad Redesgn!Replacement at a cost of $200,300.00 and the 2021 Capital Forecast
includes the Beachfront Park Boardwalk Replacement at .e Dost of $1,340,000.00. The designs of
these projects must consider lake level and storm affects in the design to ensure a more resilient
and robust structure.
9
CS 30-17
December 11, 2017
Subject: Lake Front Water Damage Page 2
The design of the Rotary Frenchman's Bay West Park Master Plan is complete and has
considered recent high lake levels and flood resilience. The 2019-2020 Waterfront Park Needs
Assessment has been reflected in the 2017 DC Background Study at a cost of $100,000.00 and
should also include a deliverable that addresses flood and storm resilience in the
recommendations of the final report.
Discussion: The lake front of both Beachfront Park and Rotary Frenchman's Bay West
Park are not protected by break walls or shore walls and are vulnerable to storm damage even in
years of normal Lake Ontario water levels. The record high water levels in 2017 together with
saturated ground from high rainfall led to conditions that caused excessive flooding and beach
damage even after average wind storms. During spring and summer of 2017, the City issued
seven service disruption notices related to various waterfront closures caused by flooding, erosion
and/or excessive debris.
Excessive damage was caused to areas including the following:
• Boardwalk
o The bdardwaik was under water on several occasions and was completely covered by
sand and debris after severe storms. The flood water lifted sections of the boardwalk
which are no longer level and boards are broken in several locations. Staff has spray
painted trip hazards and installed safety cones in the worst areas. In the short term,
Public Works staff will complete repairs in spring 2018. _In the long term, the boardwalk
must be re -built, and this project is reflected in the 2021 Capital Forecast.
• Playground
o The playground was closed multiple times due to sand and rock debris from storms and
flooding. The beach on the south side eroded causing unsafe conditions for use of the
slide. The beach level will need to be permanently re -instated to use the slide.
• Beach volleyball courts _
o The beach volleyball courts were inundated by sand almost a third of the way up the
posts. The sand build-up and high water levels made the courts unusable all summer._
The beach level will have to be dug out, stones removed and re -levelled with clean sand
to open the beach volleyball courts in 2018.
• Picnic benches
o The picnic benches were inundated and partially buried by storm debris and sand shift.
The benches have been dug out and relocated.
• Memorial benches
o Memorial benches close to the shore line were undermined by water erosion, resulting
in sixteen benches being relocated.
100
CS 30-17 December 11, 2017
Subject: Lake Front Water Damage Page 3
• Splash pad
o- The water all summer was up to the south side retaining wall causing gravel and rocks
to be swept into the splash pad during wind events. Staff will clear storm debris as
needed in 2018.
• Millennium Square
o Millennium Square flooded on numerous occasions. Sand and debris was swept into
the square frequently. Staff will clear storm debris as needed in 2018.
• Harbour entrance arms
o The record lake water levels exceeded the maximum design water height. Many of the
fill and fines in the riprap construction of the break walls has been washed out and will
need to be replaced. Engineering staff are investigating the extent of any remedial work
needed.
Beachfront Promenade
o High water levels washed out the road completely, bisecting the road and connecting
Lake Ontario to Frenchman's Bay- The gravel roadway deteriorated with severe
potholing that could not be adequately repaired due to the saturated condition of the
road base. The parking lot was flooded at the edge of Frenchman's Bay and the edge
could not be seen, making it unsafe to use. -Curbs and ironstone was added to the
Frenchman's Bay side of the parking lot to reinstate the edge and prevent vehicles from
getting too close to the water.
• Sand beach
o A significant section of beach was eroded into the lake. The remainder was covered
with almost three feet of sand and stone from storm events. Piles of wood and other
debris were removed from the beach on a regular basis- Heavy equipment will be
needed in spring 2018 to remove rocks and debris and re -grade the sand beach back to
its previous condition.
Large volumes of wood and debris washed up onto the City's beachfront. Stone and sand was
swept up onto the beach to a depth in places of over one metre. Sections of Lakeshore were
eroded into the lakeand can never be recovered,' The attached photographs illustrate the level of
damage (see Attachment #4).
Public Works repeatedly assigned crews to clean up, regrade beach levels and pump water to try
to maintain a level of service only to find that days later another storm would undo their hard work.
Beachfront Promenade was for a significant tinie, completely cut off by flooding that extended
from Lake Ontario across the road to Frenchman's Bay, completely cutting off the Pickering
Rouge Canoe Club's access by road. Based on equipment, labour and materials used on
emergency repairs (not routine maintenance), the 2017 cost was in the order of $55,000.00.
This work was absorbed by the existing 2017 Public Works operating budget, however the true
cost is that regular maintenance and repair tasks elsewhere in the City had to be sacrificed to
make resources available for emergency beachfront repair. Public Works is well equipped to deal
with emergency events, and -does so almost routinely. The City must, however, consider a
101
CS 30-17 December 11, 2017
Subject: Lake Front Water Damage Page 4
complete reinstatement of infrastructure at the lake front with a more resilient and robust design,
better suited to stand up to future severe weather events and high lake water levels,
Future Trends
Starting in April 2017, floodwaters along the shores of Lake Ontario closed roads, inundated
homes, and destroyed break walls. Shore side residents saw the lake rise almost one meter
above its normal levels, eroding away shorelines and threatening homes.
Lake Ontario receives water from precipitation, runoff from the surrounding basin, and water from
the Niagara River. In the spring of 2017, all three sources dumped more water than normal into
Lake Ontario. From January 2017 to June 2017, - the Niagara River swelled to higher than
average levels, The Niagara River added almost a half a meter, relative to historical averages, to
Lake Ontario. April 2017 to May 2017 hammered the Lake Ontario basin with record-breaking
precipitation. Since the Great Lakes are connected, current water levels in Lakes Superior,
Michigan, and Huron, which rose to record highs three years ago, set the stage for 2017 flooding.
Between January 2013 and December 2015, these lakes experienced the most rapid rise in water
level ever recorded. As a result of high precipitation, Lake Superior rose 0.6 meters during that
time, whereas Lakes Michigan and Huron, which hydrologists think of as one vast body of water,
ros.e one meter. The flooding of Lake Ontario thus was a story three years in the making. We
went from record lows over a 100 year period to a record high -in just five years. In other words,
extremes may become more common.
Lake Ontario stretches 310 kilometres, spanning the U.S. border with Canada between the state
of New York and the province of Ontario. On both sides of the border, residents and politicians
called on managers of the Moses -Saunders Dam located near Cornwall, Ontario, (Attachment #2)
which regulates water levels of Lake Ontario, to increase outflow from the lake into the St,
Lawrence River.
The International Joint Commission (IJC) is the U.S./Canadian organization that regulates bodies
of water that cross or span the border. Approximately 10,400 cubic metres of water rush out of
the Moses -Saunders Dam every second. That represents the highest flow rate the IJC will allow.
Residents downstream along the St. Lawrence River,, all the way northeast to Montreal, were also
fighting back floodwaters in 2017. Any additional flow of water from Lake Ontario would have
overwhelmed them further.
Additionally, any increased water flow would increase riverbank erosion, which reduces depths
along the critical commercial navigation route of the St. Lawrence Seaway, potentially jeopardizing
the safety of ships or halting commercial navigation, The IJC have therefore set the maximum
flow rate of the Moses -Saunders Dam at 10,400 m3/s.
Plan 2014
The International Joint Commission, after 14 years of scientific study and public engagement,
advanced "Plan 2014" as the preferred option for regulating Lake Ontario and St. Lawrence River
water levels and flows.
102
CS 30-17 ,December 11, 2017
Subject: Lake Front Water Damage Page 5
Plan 2014 was designed to provide for more natural variations of water levels of Lake Ontario and
the St. Lawrence River, and is intended to restore the ecosystem health. It will continue to
moderate extreme high and low levels, better maintain system -wide levels for navigation,
frequently extend the recreational boating season and slightly increase hydropower production.
More year-to-year variation in water levels are believed to improve coastal health.
The result in this is that larger fluctuations in Lake Ontario water levels may be expected, including
the potential for high water levels similar to those experienced in 2017. Lakeshore communities
should take into account the potential lake level fluctuations and potentially higher risk of flooding
and storm damage in years of high precipitation.
Next Steps
Staff anticipate significant costs to return Beachfront Park and Rotary Frenchman's Bay West
Park to the pre -flood conditions and fully open all amenities for full use.in 2018. Staff's concern is
that if the water levels and storm conditions return in future years, we may be spending funds re-
building only to have a repeat of the damage and repair costs. Prior to any decision to expend
staff resources and direct funds to reinstating the original conditions, staff are recommending that
a thorough review of both Beachfront Park and Rotary Frenchman's Bay West Park's amenities
and design be completed.
This review, to be led by a consultant, is reflected in the 2017 DC .Background Study as
Waterfront Park Needs Assessment in years 2019 to 2020, at a cost of $100,000.00. With the
planned -development of Seaton and the increase in population growth expected in the City
Centre, now is an appropriate time to review the amenities, provided at the City's lake front, and
plan for future development and the level of service needs of a growing population. This will avoid
significant expenditure for repair and reinstatement in 2018 that would not be compatible with the
long term vision for the City's lake front.
The 2020 Capital Forecast includes the planned Waterfront Splash pad Redesign/Replacement
for $200,000.00. Again, the design of this project will consider lake level and storm affects in the
design to ensure a more resilient and robust structure. The currentlocation suffers, with high lake
water levels, from rocks and debris thrown onto the Splash pad needing frequent clean up to
ensure safe use.
The 2021 Capital Forecast includes the Beachfront Park Boardwalk Replacement for
$1,340,000.00. The design of thisproject will consider lake level and storm affects in the design
to ensure a more resilient and robust structure. Until replacement, Public Works will continue to
maintain the boardwalk in a safe condition for public use and respond as necessary to future flood
and storm damage.
The Rotary Frenchman's Bay West Park Master Plan consists of three phases in the 2018, 2019
and 2020 Capital Budget and Forecast and includes the reconstruction of Beachfront Promenade
and the construction of pedestrian trails and other park amenities. The design of this project is
complete and has considered recent high lake levels and flood resilience. The reconstruction will
provide a more robust road to the parking lot with improved boat launch access beyond. The first
103
CS 30-17
December 11, 2017
Subject: Lake Front Water Damage Page 6
phase consisting of the west end of Beachfront Promenade reconstruction will be completed in
2018, subject to budget approval.
Attachments:
1. Historic Data between 1918 and 2017
2. Moses Saunders Dam and Location
3. 2017 Lake Ontario Daily Outflows and Daily Lake Ontario Levels between 2015 and 2017
4. Photograph of damage
Prepared By:
Brian Du field
Division Head, Operations
BD:nm
App,rovedJEndorsed By:
1J
Marisa Carpi -no, MA
Director, Community Services
Ric and Holborn
D' ector, Engineering Services
Recommended for the consideration
of Pickering Ci Council
Tony Prevedel, P.Eng.
Chief Administrative Officer
4, zo(7
104
'Year- Jan Feb.-- Mar 1 Apr May T Jun Jul / Aug 7 -Sep j Oct Nov . Dec T Yearly 1 Minimum Maximum 1 Range .1
; - ;
• - • / 74 72 74.921; 7 75.28, 75,161 ,011
-6) 0,22-
t Average Monthly 1' Monthly
' 5 10 75.091 75.0
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al • 74 4411
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r • 74.34 74.24 7428/ 7444 743b' 74I O52
._ 48
- 74 30 74.27 74.30 791 747754 .
• 1924 74.34! • 74.40,_
1923 - • ,• • 1•'''-'!".74 55 74.76- t ' • 1470 74,23,
1925 74.20' 74 .
• Y6, 74 Ir6j2i---747611.....- 14.56/ 74.49 74.40F 74.3
20 I& 74.16;. -1•"-74401 7415
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,-• 1927: 74.50; 7.47)- 74 74j
1926. 7 T_ 74.Thr, • 74.67 7464; 7 -
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14: 74.121
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1930!: 74.98r 75498',..--7624 51
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74.26C- 74.2.31-"'74.50, 74.4
Sk 74.35
74.511
4 46F 74 51F 74.oal
1931/. - 74.79_
7 38- 74 26' 74.101_ 73.98! 73.._88h. 73.96,. 74.
74.79
74 70' 74.61; 74.44., • 74.324.__
1933. 74.24; 74.211 74.20i 74.39i., 74.541 74.57. 74.48 4. _
--'74:66"'"-"f4:141 73.821. 73.74t 02s 73.741
0.56;
57 0.61'
74.29 0.55.
1935! 7381/ 73,8*; 73,94 .74.031 74.111 74.194 74.24774.16 /I 74.041* 73.92,1 73.88:1.1_ 73.87) 74.001 - 73.81i • 74.244 0.43
1936.; 73815 73.764 . 73.98 . ‘1.4.5i. .„,.,-7,163j.t.„....:74.441 : 74.34 74.2311 ' - 74:161.4.08i. 74.064 74.004 74.'1E1 73.7Eq 74:53 • 0.75
1937F- 74.'14114:31174.39,-77411r• 74.70174L7F7:06 74.59•'••••• 74.5511 74.40 -/4746:1 74.34' . 74.50:: 74.1"21T- fi.'ff --ICA '
i. •__ 193* 74:28"/ 74.381; 74.54 74.761- 74.741 74.72/ 74.661 ...74.641 74.52t 74.46. 74.36; 74.274_74521 74.27-. 7474. 0.47
19591 74.24 74.261' 74.42. 74.681_74,601 74.78r747771_ 74.665. 74.1.7 74.384 74.26.; , 74.18:,_ 74491 _ 74.181_._ 74.80 ....,.. 0.62
.•
19401, 74.12! 74,0* 74.08, 7437 7462! 74.7E. 7475 74-661} 74.64 74A2i 74.367 74.3811 74.4a; . 74.08,,, 74.75, 6.67.:
I., .,.........,
1941 ..___74,50,1 74,52'3._ 74.53,74.62 74.60L 74.s3 24.46( ,.,,.. 74.37' 74.2r. 74.18t 74,16Z„,.. 7414 74.41i_ •7.4:iPti/ y4.62' 0.48
... ........ ._...._. .; -,. . . ...,-
19421 7414 74.141, 74.30: 74.58, 74.70 4-4.(91- 74741 74.691r74.60i -Tail 74.501 74.8.04 74.523 744 7479 0.65/
1943: 74.641 74.72; 74.89 75.06l 75.33i 75.60; 75.5L4 75444 75.29; 7q19.1 75.06l 74.9411 75.131. 74.641 • 75.60 0.961
..... • .........,
• 1944' 74.80/ 74.72/ 74.72, 74.88/ 75.061 75.12 75„_,..111 75.003 .74583 74,73k 74.591 74 54' 74.8511 74.54t 75.12
----
27
, . •.. - - -
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I •19461 76.161, 75.10' • 75.20 75.164 711147-7-5713 WA -74:6e4 -74.84 Yitie) 771.72;; 747661 -I4 _ 0
.994 74.66111 75.2l 541-i
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• 74.37/ 74.88
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•
01
1959:7418: 74 30§ 74.48 T 74.79; _74 861. 74 691
19601 74-451 74584 74.59;, 74.87x, 7511; 75.141
1961' 74.33. 74.23; 74-4374.66. 74.94
1902 74 331 74.271. 74,32;; 74 6 1'2 74.851 74.98
1963'- 74A9;.74,33," 74311. 747151 74.92, 75.05
1904-21.
74.18! 74 02 74 0 74271 7R 54, 74.679
'1965 773 83.f mm73.88;; 74.04.1' 74.25 --74.51-, 74.63
1965 74.56= 74.531 74.6611 74.74 74.79;; 74.91"
1967. 74.55 74.00' 74.531' 74.77; 74.97' 75.094
19684 74.67; 74.69', 74.701 74.901 7420°, 75.02
1969 74.621 74.094 74.62; 74.61 75.021 75.15'
1970; 74.42' 74.44 74.46i 74,5% 74 301. 74.94'
1911: 74.5811- 74.571 74.71;; 74.871 75.021 74.981
19721 74.54 74.63=T 74.73.1;,,,74.951_,75.21 75.2,6
i_,1'...---
¶0731 75 03 7521; 75.334 ' 75.66 7577.3.„ 75.70
1974 77413, 75.024' 75.1_01-___75.291 75.50" 75.59'. 75.501,_ 75_251_ 74.96 74.68; 74.531.1711.4. 75.07
975': 74 56 74-.711; 74.841 75 011 75.101 75.10 74,983 74 83 , 74.73;1_ 74701 74 63; 74 56- 74 81'
19761 7462; 74711: 75.0771 75.375- _,75.54..1 75,54 7,5A __75 22' 75.001' _74.83'1 74,673rt� 74.541 75.04:
1977* 74.501_ 74.4411 74.621 74.86] 74.90;: 74.62, 74.85 74.66\ 74,82' 74.831 74,75174.851- 74.761
1978', 75.081 75.121. 74-98'. 75.22; 75.321 75.2 1 75.0411 74.89;} 74.73'1, 74.58' 74.44'' 7442 74.921.
19791 74,591 74.64j 74.771 75.05''"" 75.16.' 75.1331 75.02?: 74.92; 74.86) 74.75L 74R.74 581. , 7484`
1980.^ 74,60;7451ti12,
74,60' 74.091 75 14; 75.13.E 75.,75.06': 74.884 74.66"sem 7q 55 74 541; 74.821
1981 74.511 74.511 74.75 74.741-1-'74764 r 74.95 75.0-1 i- 74 981 71.9-k 74801 74.761 74.651. 74.79.
1982 74.591 74.601 74.62; 74.91E76.001 75.07" 75.03; 74 85 74.711. 74.58; 74.53 74.54' y 74.75E
1983`. 74.64; 74.761. 74.77;: 74671 75,151, 75.17; --
74.69_ 74. L. 51 74434, 74 251 74.211- 74 32T 74 48' 74.181. 74.86 0.70'
75.00i„"_::7_,1732.
74.80; '7=i14.617- 7450' ---14---.1197-774743.17471; 74431 75.44---07-0
74.96 74 62, 7_1._,69,:. __74.02L 74.40 743811 7.4„..6__„t r 74.231 75.09! 0 77'
74.88 74 85 74 741 74 69;1 74 623 74 60 74 64 74 275 74 93 0 66
75:02L 74 96 74 60+ 74.581 74 41 n 74 33, 74 66 74,311 75 061 0-77E.
f
--17149.,§L74.57,1,774.43C' 74.2.21___74.0a: 73.86; _..,11174121-,11_-173.893_111_11- 74 68 0 82
- 74.71 74.66,E 74 60(74 541 74 5Z 74581 74.40'i 3.83) 74.71" '618'1
74.90:1 74.84 74.71 74.55) 74.50,1, 74.57;:.. 691 74.50( 4,91' 041.
75,151 7510; 74,96, 74.901. 74.87' 74.77t Y 7416; - 74.53 75.15 0 62
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7_512pjr_ 74 93 74 65 74 50' 74 451 74.447 74 751 74.44; 75,15 0 71
74.99 74:9"6 74.7_4' 74.646 74.56 74.58 --74761, 74.42; .74,991 '6:6Y:
74.931 7412, 74.741: 74.59 74.441 74.43 74.72♦ 74.485---- 75.02E- 0.58.,
7534 75.25- _ 75.02". 74,70J,, 74.7t_T 74 60` 74.94i 74.54,11_. _ 75.34; 0.60 {
M 75,51. 7'-'i-5-727.'-- 75,07 74.78: 74.64; 74.634 75.21 s-"-7476-3., 75 731 1 10
7-4.375.5 1061
74 56' 75.10' 0,54'
74.54. 75,541 1.09
74.44 74.90E -0.46;
74.42{1� 75.32 __ 0.90;
7413 75.161 -0.578
74.541, 75„.114 I7,60•`
74.51 1 75.011:9.5c1
74.53! 75.07 0,541
00 74.92;: 74..791 74,64, 74.53,` 74'.621 74.621 74.531 75.17
_ 19841 7473 74.76 74.901_ 75.12 75.30! 75.32; 75.21 75 0211 74.82♦ 74.631 _74.521_ 91
"74.491 74.90; 74.
A�_ 19861 74.684 r 4 631
-14.66- 75.099 -75-2161 75.171 75.11 y 74.93` 74.801 74.64. 7-411 74,79` 74.88'; 74.631
4 _- 1986 74.90; Y 74.98 75.OG
1968 74 53 7A 591 74.591- 74 & 74 88 74.92+ 74.66' 74.801, 74.651 74.56? 74.54 74.4611. 74.61117-74.46,
1989 74.421 74 43: 74.3.% 74:7041 74.9T 75.22i 75.191 I _, sT
'
75,2911-77E211. 75.34; 75.3311 75.25;; 75.11; 75.161 75.04;; 75.02:. 75.16 74.95:
1967 7.5.0_0J 75 04, 75,001 76 21; 76 131 75.1 74.93; 74.621 74,51;; 74.44; 74.54 74.85 74.44;
- ...._.i1'.....14.7,9_,_ ..w,».
�P� 75.02 74.64' 74.7011 74.65; 74.58` ^ '74.76", 74.39•
1990 74 54; 74.6Z 7477' 74.98 75 111, 75 144 752,,, 5 74.57[ 74.70 74.64! 74.62, 74:5 74.80E 74 54 75.
1901 74.93] 75 00; 75.06. 75 20 75 29, 75,181 75.04'1 -7-4.661r m 74.64 74,491 74.361 74.391 7.87 74 36. 75.291 0,931
1992 74.441 74.45; 74.561 74.84 75.1 75.05i 75.001 , 75,03 74.98` 74.851 74.621 74.86; 74.83'. 74.44 75.11 0,671
1993 75.64; 7516; 7514; 7542' 75 61'1. 75 461 75.244 75.011 74.764 . 74,60'' 74.521 74 56, 75.041; 74,54 75.611 1.09'
1994 74.65/ 74.52^ 74 55`. 74.87i 75.10! 75.081 75.021 74 931 74 78 74.62' 74.54 74 50 74.761' 74.50 75.10+ 0.60 0
19951 74.54: 74.72; 74.711 7410; 74.80 7490, 74.911 74.08. 74.701 74.66] 74791 74.65' 74.74 74.545 74.911- 0-.371'
. 1996 74 62` 74 75;_ 74.771 74 821 7513 75.23 75,15 74 99? 74 83 74.74" 74 72' 7'4777F74.87 74 62€ ..r 75.23: 1:61.1:
i 19971 74 81 74.90 .75.011 75217, � 7533., 75.30' 75,19, 75,011 74 87� 74,74j 74:631 -74594, 74.961 74.591, 75.33 `
1998 74.82, 75,081 7515; 75.42} 75,35 75,181 75.14'; 74.93"; 74,73,. 74.511 74.34,x'' '74.29 74.91_ 74.29' 75.42,'
1999 74.32) 74 431 74-50.! 74.631 74 71 74_781 74.814 74.731._ 74.55? 74.471 74.43'{ _ 74.47.7_74z571 74,34 74.8' Ori49
2000 Y 74,501 74 45. 74 58' 74.821 75,10; 76.2675.246 75.06` 7433 1 74.61\ -74."46Em 74.47 7,41..78.71-7----f4.45...---75.26 61-1 "
�.. 2001,74.499' • 7465 7465i.74.84ti 74,93+ 74.99x_74.97 7482; 7463,' 74.53...: 74,47' 74.52' 74.70' 74.471. 74,99'r 0.52 v'
5.321 0.831
-57:1751
75.341 0.44,
7521;
74,921 13.48
75.22;4 0,63
s7
rri
z
-4
2002 74.6 74.55 7419 74_±4v75.22 78.33 76:19 74:91 74,86. 7-4.49 _71,_35 7432 7479 _ _ 74.32 76.33 1 01
2002 74.55 74.20 7435 '7473 74.955 76,12 75.4_5 74-89 74.75 74,63 7464 74.73 74-71 74229 75-1.2 0-63
'x 04 74,E 74,76 74.72 74 69' 75.04 75,14 75.00 7q,..02 74_£!51 74,74 74.50 74.53 _ 74,85 74.50 75.14 054
74.74' 74.65 _ 74:174 7603 75,.11 75,02 7.4-.94 74-70 74.69 71.60 74..56 7465 71.91 74.56 75.11 0.56
2095 74.5°1 74.56 74,62 74.63 74-54 74.69 14.99 74.55 74.81 74.74 74.79 74.63 74.63 7463 74.98 0.35
2007 7428 74.97 74.85 76.01 7$.05• 7 _9 7.5,55 76.71 7'4.' 74,47 74.31 74.32 74.75 74.3E 75.105. 0.74
2005 7456 74, 7 6 74.57 75.16 75.30 75.19 75.12 7.5.06 74.81 77 l.4G ' 74.51 74.55 74.58• 74.5i 78.84 0.79
2040 7470 74.82 7492 787,12 75.19 75.16 75.12 75.00 74-78 74.544 74.50 74.46 74.87 74.45 75,18 0,71
2010 74.51 74.54 74. 74,66 574.71 74Er5 7497 74.94 74.72 - __ 74.61 74.53 _^_74,52. - 74_x7 7454 ---- 7�_ 7 0.47
2011 7449 _74,41 7461 7.4,86 75 23 75_33 75.14 74.9'4 74.78 74.55 7458 74..62 74-0 74.1,1 75.33 0.44
2012 74.00 74-49 7t7 74.92 74.91 74.90 74.791 74.55 74.50 74434 74W 74.29 74,70 7425 74,99 9,71
2413 74..38 74.52 74,5_7 _74,72 74_.86 -75.10 75.74 7+. 74.79 74-54 74.60 74.53 74.74 74.58 75.14 078
2014 74.64 ' 74.61 74.151 74.63 75.14 76.17 76,0.9 74.96 74,75 74,69 74,45 74,46 74,76 _ 74.4.9 75.17; 0L71
29'16 74.68 74,50 74,47 74,62 74.61 75.07 75.21, 75.11 74.91' 74-07 74.56 7.4,47 74.74 74.41 75/1 0.0
2015 74.83 74.82 74.97 76.11. 75.06 76:02 7495; 7484 74,70 74.54 74.45 79.46 74.57 74.46 75,11 0.55
2017 75.8t
All -Time
•A,i r2gu 74.65 74:60 74.66 74.88 75.01 75.05 78.001 74- 8 74.74 74_51 74.53 74.52 7410 74,42 75.06 0-68
Min um 73,31 73.75 75-'94 74.03 74.11 74.19+ 74.141 7#.t 73.01 7352_ 18 7335 73.74 74,00 7'3.74 7+4-.24 D-
615
7ilaxnnaum 'it. -i6 -i615.27 76-37 76-85 75.73_ 75.76 Tire. 75,,59 7$,41. 75,22' , _76-7 21) -- 76.37 ---747E6 - 75.70 1.13
2007-2016
Average 74.63 74.69 _74.73 74.9. 75.03_ 75-_07- _ 75_.04 7_4,92 7__4.7.3_ 74-57 744_8 7_4_47_
Lake Ontario water levels In metres referred to Chart Datum _ 0°i
2016 643 Ira-- - 4.53 0.7 01:63.- -0.87 <' 0.&f'T 0.72 - - 0.53 _ 0.37' 4.26 -_ 0.27
11 -°lima - - tr
,liner, a a 030 _ 0.40 • 0.45 0,58 0-61 (1:88 _ 1:1370- 0 4169 _ 054. 0.41 033 _ 0.32
Minimum -0-39' -0.42 -0.26 -0.17 -0.09 -0.01 -0.06 -0.20 -029' -0.38 045 -0.;46 I '-s.
Maximum 0.95 1.07 1.17 1.45 1,53 .1.58 Tile' 1.38 1.21 1.02., 0.96 1.00
d
29 -May -17 75 .!5 r�ri Highest ever recorded by 120mm O
010mm above last ten year average high
=-4 o
U
O
743
Ihtg,
i
LOSL Study -WaterLevei and Flow
Regulation
Lower St.
Lawrence River
ebec
roil-Rivieres
ontreal
Canada
Toronto
Upper St.
Lawrence River
0
Rochester
110
drYFACI W1 NT r .3 TO REFORT # ' - 14
2017 Lake Ontario Daily Outflows (rn3fs)
a
BOOD
7S ►M i.
6,500
5000
4O
J i< , 11 A Al J A S 0 D
arage (9910-0i6)) ! Prippject Piano 2014 ...Actua1
Daily Lake Ontario Levels=
131.7
= 249.5
2483
247.5
2484
- 2453
244.5
243.-5
393820113arrr'tiz7 Cali; <y,:net" rz.7-2.C2nt_.B3i.r
2425
241.5
244.5
234.5
238.5
F M 1 4 NI J 4 5 0 N • D
itth
=2015 :CU 24,17 - Ma - min -__.._/,vv age