FINAL REPORT - International Joint Commission

ANNEX 3
IF Lake Ontario level >= 74.20 m THEN
lsMintarget = 72.6 m
ELSE
lsMintarget = 72.6 m - (74.2 m - Lake Ontario level)
END IF
maxLS = LSq(Kingston level, lsN, lsMintarget)
IF the maximum flow to keep Long Sault above 72.6 m < normal L limit then set the L limit to this flow.
Modified P* limit
A revised P* limit is used to keep the Lac St. Louis outflow above 6,800 m3/s (a Lac St. Louis level of
about 20.64 m) if the Lake Ontario level is above 74.30 m. If the Lake Ontario level is above 74.20 m but
less than 74.30 m, then keep the L St. Louis flow above 6400 m3/s (20.5 m). If the L. Ontario level is
above 73.80 m but less than 74.20 m then keep the L. St. Louis flow above 6100 m3/s (20.4 m). If the
L. Ontario level is less than 73.80 m, then keep the L. St. Louis flow above 5770 m3/s (20.3 m). In addition,
if the Lake Ontario level is more than 35 cm below its target level (see Table B-1 above), then these target
L. St. Louis outflows are reduced by 200 m3/s.
The M limit is set to the P* limit if the Lake Ontario level is less than 74.20 m.
These rules apply throughout the year.
The Lac St. Louis minus Lake Ontario outflow is defined as stlont in the following:
SELECT CASE Lake Ontario level
CASE IS > 74.30
MINPSTAR = 6800 - stlont
IF devlev