FINAL REPORT - International Joint Commission

Table C-8: Economic results for candidate plans by interest and region based on the extreme
stochastic supply sequence S2—the century with the most severe wet Lake Ontario
supply period, as well as the largest range from wet to dry supplies
ANNEX 3
S2 – Extremely Wet with Largest Range (Economic – Average Annual $M)
Average Annual Net Benefits ($M) Plan A + Plan B + Plan D + Plan E
Total $9.76 $3.97 $5.42 -$33.96
COASTAL $4.31 -$1.05 $0.06 -$43.32
Lake Ontario $4.40 -$0.77 $0.02 -$39.41
Shore Protection Maintenance $3.20 $0.84 $0.58 -$11.85
Erosion to Unprotected Developed Parcels -$0.10 -$0.10 -$0.02 -$0.27
Flooding $1.30 -$1.52 -$0.53 -$27.29
Upper St. Lawrence River $0.17 -$0.07 -$0.22 -$3.56
Flooding $0.17 -$0.07 -$0.22 -$3.56
St. Lawrence -$0.26 -$0.21 $0.25 -$0.34
Flooding -$0.34 -$0.13 $0.09 -$0.40
Shore Protection Maintenance $0.09 -$0.08 $0.16 $0.06
COMMERCIAL NAVIGATION -$0.61 $0.73 $1.41 $5.08
Lake Ontario -$0.04 -$0.01 -$0.01 -$0.02
Seaway -$0.49 $0.80 $1.44 $5.11
Montreal down -$0.09 -$0.06 -$0.02 $0.00
HYDROPOWER $0.40 $4.39 $0.99 $12.22
NYPA-OPG $1.01 $2.64 $0.28 $9.24
Hydro Quebec -$0.61 $1.75 $0.71 $2.99
RECREATIONAL BOATING $5.46 -$0.10 $2.76 -$7.95
Above Dam $3.17 -$0.88 $0.95 -$9.64
Lake Ontario $2.26 -$0.78 $0.53 -$7.48
Alex Bay $0.88 -$0.15 $0.36 -$2.06
Ogdensburg $0.06 $0.01 $0.04 -$0.15
Lake St. Lawrence -$0.03 $0.05 $0.03 $0.05
Below Dam $2.29 $0.78 $1.81 $1.69
Lac St. Louis $1.17 $0.50 $0.85 $0.91
Montreal $0.88 $0.27 $0.73 $0.63
Lac St. Pierre $0.24 $0.01 $0.22 $0.16
M&I $0.20 $0.00 $0.20 $0.00
SL One-time infrastructure costs $0.00 $0.00 $0.00 $0.00
LSL Water Quality Investments $0.20 $0.00 $0.20 $0.00
Notes to Table C-8:
1. Figures represent the average annual impact relative to Plan 1958-DD and are measured in millions of U.S. dollars.
Blue indicates a positive net benefit relative to 1958-DD and red indicates a negative net benefit relative to 1958-DD.
2. S1 through S4 represent four separate 101-year extreme centuries selected from the 50,000-year stochastic series,
where S1 is extremely dry, S2 is extremely wet and has a large range, S3 is similar to historical and S4 has the
longest drought.
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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