FINAL REPORT - International Joint Commission

Table C-18: Economic results for candidate plans by interest and region based on the climate
change sequence C4—not as warm but wet
ANNEX 3
C4 – Not as Warm but Wet (Economic – Average Annual $M)
Average Annual Net Benefits ($M) Plan A + Plan B + Plan D + Plan E
Total $8.33 $11.78 $9.65 -$21.38
COASTAL -$3.42 -$2.67 -$0.90 -$38.13
Lake Ontario -$1.63 -$2.26 -$0.68 -$34.10
Shore Protection Maintenance -$1.46 -$2.04 -$0.60 -$12.26
Erosion to Unprotected Developed Parcels -$0.16 -$0.20 -$0.08 -$0.40
Flooding -$0.01 -$0.03 $0.00 -$21.45
Upper St. Lawrence River $0.00 $0.00 $0.00 -$1.84
Flooding $0.00 $0.00 $0.00 -$1.84
St. Lawrence -$1.80 -$0.41 -$0.22 -$2.19
Flooding -$1.62 -$0.43 -$0.10 -$1.95
Shore Protection Maintenance -$0.18 $0.02 -$0.12 -$0.24
COMMERCIAL NAVIGATION -$0.61 $2.74 $3.06 $5.21
Lake Ontario -$0.04 -$0.01 -$0.01 -$0.01
Seaway -$0.56 $2.73 $3.00 $5.17
Montreal down -$0.01 $0.02 $0.07 $0.06
HYDROPOWER $7.29 $8.89 $4.01 $17.95
NYPA-OPG $5.73 $7.50 $3.62 $15.26
Hydro Quebec $1.56 $1.39 $0.39 $2.69
RECREATIONAL BOATING $5.07 $2.83 $3.48 -$6.40
Above Dam $3.28 $1.73 $2.62 -$8.06
Lake Ontario $1.93 $0.68 $1.36 -$7.06
Alex Bay $1.33 $0.94 $1.14 -$0.96
Ogdensburg $0.01 $0.01 $0.01 -$0.15
Lake St. Lawrence $0.00 $0.10 $0.11 $0.11
Below Dam $1.79 $1.10 $0.86 $1.66
Lac St. Louis $1.03 $0.68 $0.50 $0.95
Montreal $0.64 $0.40 $0.32 $0.60
Lac St. Pierre $0.12 $0.02 $0.04 $0.11
M&I $0.00 $0.00 $0.00 $0.00
SL One-time infrastructure costs $0.00 $0.00 $0.00 $0.00
LSL Water Quality Investments $0.00 $0.00 $0.00 $0.00
Notes to Table C-18:
1. Figures represent the average annual impact relative to Plan 1958-DD, in millions of U.S. dollars. No discounting is
applied. Blue indicates a positive net benefit relative to 1958-DD and red indicates a negative net benefit relative
to 1958-DD.
2. C1 through C4 represent four separate 101-year climate-change time series based on different supply series, where
C1 is warm/dry, C2 is not so warm/dry, C3 is warm/wet and C4 is not so warm/wet.
3. Plan E is shown for comparison purposes only to represent the natural flow condition. Plan E is not a candidate plan.
Options for Managing Lake Ontario and St. Lawrence River Water Levels and Flows
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