FINAL REPORT - International Joint Commission

ANNEX 3
Table C-1: Average annual damages for Plan 1958-DD under the historical2 and 50,000 year
stochastic3 sequence
1958-DD
1958-DD
Performance Indicator Historic 2 50,000 yr Stochastic 3
COASTAL $21.74 $26.07
Lake Ontario $13.28 $18.15
Shore Protection Maintenance 4 $12.22 $15.48
Erosion (unprotected developed parcels) 4 $1.06 $2.50
Flooding $0.00 $0.17
Upper St. Lawrence River $0.00 $0.01
Flooding $0.00 $0.01
St. Lawrence $8.46 $7.91
Flooding $1.41 $0.98
Shore Protection Maintenance 5 $7.05 $6.935
COMMERCIAL NAVIGATION $194.37 $193.31
Lake Ontario $29.22 $29.22
Seaway $108.80 $107.93
Montreal down $56.35 $56.17
HYDROPOWER 1 $348.90 $345.04
NYPA-OPG $249.81 $246.89
Hydro Quebec $99.09 $98.15
RECREATIONAL BOATING $16.75 $15.83
Above Dam $8.61 $8.00
Lake Ontario $4.69 $4.33
Alex Bay $3.83 $3.60
Ogdensburg $0.02 $0.02
Lake St. Lawrence $0.07 $0.05
Below Dam $8.14 $7.83
Lac St. Louis $3.29 $3.24
Montreal $3.76 $3.56
Lac St. Pierre $1.09 $1.02
M&I $0.50 $0.00
SL One-time infrastructure costs $0.31 $0.00
LSL Water Quality Investments $0.20 $0.00
Notes to Table C-1:
1. Results are absolute average annual values (US$M) with all numbers representing costs (damages) except the
hydropower numbers, which measure the value to society of the electricity produced (i.e., economic surplus of the
electricity produced at the hydroelectric plants on the St. Lawrence and Niagara rivers that are affected by Lake
Ontario levels and flows).
2. Historical sequence represents supplies from 1900 to 2000.
3. The 50,000-year stochastic is a statistically generated sequence based on historical supplies (actually 49,995 years).
4. Coastal Erosion and Shore Protection on Lake Ontario are discounted damages for all stochastic supply sequences
but regular (non-discounted) damages for all other supply sequences.
5. Lower St. Lawrence River shore protection is based on the average of four 101-year stochastic simulations and the
historical supply sequence since the St. Lawrence River Model component of the Shared Vision Model could not be
adapted to run the full 50,000-year stochastic series.
214 Options for Managing Lake Ontario and St. Lawrence River Water Levels and Flows