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Marine Navigation Services - Water Level Information
St. Lawrence Ship Channel
Water Level Forecasts and Information Bulletin (No. 13-02)
Forecasts as of May 17, 2013, for the expected lowest water levels at the indicated stations in the St. Lawrence ship channel.
Expected Lowest Water Level Above Chart Datum
| Station | 3 days (17/05-18/05) |
4 to 7 days (19/05-23/05) |
Week 2 (24/05-30/05) |
Week 3 (31/05-06/06) |
Week 4 (07/06-13/06) |
|---|---|---|---|---|---|
| Montreal | 1m(3' 3") | 0.9m (2' 11") | 0.7m (2' 3") | 0.4m (1' 3") | 0.2m (0' 7") |
| Sorel | 1.2m (3' 11") | 1.2m (3' 11") | 1.1m (3' 7") | 0.7m (2' 3") | 0.5m (1' 7") |
| Trois-Rivieres | 1.3m (4' 3") | 1.3m (4' 3") | 1.3m (4' 3") | 0.9m (2' 11") | 0.7m (2' 3") |
Note:
- These forecasts give the expected minimum water levels above chart datum at the indicated locations and at the specified times to assist commercial shipping in short term planning of operations (1 to 4 weeks).
- This bulletin is produced by the Hydraulic Engineering sector, CCG, Central and Arctic Region on Thursday of each week during the navigation season.
Caution:
It should be clearly understood that this information is a forecast of water levels which may be altered by short term hydrometeorological factors. The vessel master or officer-in-charge has the ultimate responsibility for the vessel safety at all times.
Pertinent Current Information
1. Lake Ontario :
| Level (m) (Weekly average water level) |
Level different from long term average (m) (Weekly average water level) |
Outflow (m3/s) (Outflow at the Moses-Saunders dam) |
Difference from previous week (Outflow at the Moses-Saunders dam) |
|
|---|---|---|---|---|
| Last week | 74.85 | 0.29 | 6430 | -230 (-3%) |
| Current | 74.88 | 0.32 | 6470 | 40 (1%) |
2. Ottawa River Outflow :
| Outflow (m3/s) (Total outflow at the Carillon dam) |
Difference from previous week (Total outflow at the Carillon dam) |
Outflow (m3/s) (Outflow into Lake St. Louis) |
Difference from previous week (Outflow into Lake St. Louis) |
|
|---|---|---|---|---|
| Last week | 5640 | -310 (-5%) | 2780 | -210 (-7%) |
| Current | 4990 | -650 (-12%) | 2380 | -400 (-14%) |
Additional information may be obtained from :
Frederic Filion, Ing.
Waterways Manager
Canadian Coast Guard
Central and Arctic Region
Waterways Manager
Canadian Coast Guard
Central and Arctic Region
101 blv. Champlain
Québec (Québec), G1K 7Y7
Phone : (418) 648-7493
Fax : (418) 648-4877
Québec (Québec), G1K 7Y7
Phone : (418) 648-7493
Fax : (418) 648-4877
