The SINECO Network
The SINECO network is an operational system for the observation and forecast of water levels that covers the whole St. Lawrence Seaway from Montréal to Sept-Îles. The network, operated by the Canadian Hydrographic Service (CHS), Québec Region, is made up of 23 stations placed at strategic locations along the seaway where water levels are measured. All stations are also equipped with sensors for measuring water depth, atmospheric pressure, water temperature, and water salinity (salinity is only monitored at stations downstream of Île d’Orléans), the latter two are used to validate water level. The sensors are placed at depths varying between 3 and 10 metres depending on the station’s set-up and water level fluctuations.
Characteristics of the network stations
| Station name | Station number | Station position | Instrument depth (varying according to tidal height) |
|---|---|---|---|
| Île d’Entrée | 1966 | 47° 16’ 37”N 61° 43’ 06”W |
2-5 m |
| Rivière-au-Renard | 2330 | 48° 59’ 45”N 64° 22’ 45”W |
2-5 m |
| Sept-Îles | 2780 | 50° 11’ 28”N 66° 22’ 23”W |
1-7 m |
| Rimouski | 2985 | 48° 28’ 54”N 68° 30’ 54”W |
3-10 m |
| Port-Alfred (Saguenay) |
3460 | 48° 20’ 03”N 70° 52’ 10”W |
2-10 m |
| Saint-Joseph-de-la-Rive | 3057 | 47° 26’ 56”N 70° 21’ 56”W |
1-10 m |
| Rocher Neptune (seasonal) | 3071 | 47° 09’ 42”N 70° 36’ 28”W |
1-9 m |
| Saint-François (Île d’Orléans) |
3100 | 45° 59’ 48”N 70° 48’ 42”W |
1-10 m |
| Lauzon | 3250 | 46° 49’ 48”N 71° 09’ 54”W |
1-9 m |
| Port de Québec | 3246 | 46°49’ 27”N 71° 11’ 54”W |
3-11 m |
| Neuville | 3280 | 46° 41’ 54”N 71° 34’ 48”W |
0-8 m |
| Portneuf | 3300 | 46° 40’ 54”N 71° 52’ 42”W |
2-8 m |
| Deschaillons (Cap-à-la-Roche) |
3335 | 46° 33’ 42”N 72° 06’ 24”W |
1-6 m |
| Batiscan | 3345 | 46° 30’ 00”N 72° 14’ 54”W |
1-5 m |
| Bécancour | 3353 | 46° 23’ 59”N 72° 22’ 44”W |
1-7 m |
| Trois-Rivières | 3360 | 46° 20’ 26”N 72° 32’ 23”W |
2-6 m |
| Port-Saint-François | 3365 | 46° 16’ 21”N 72° 37’ 10”W |
1-5 m |
| Lac St-Pierre | 15975 | 46° 11’ 41”N 72° 53’ 45”W |
1-5 m |
| Sorel | 15930 | 46° 02’ 49”N 73° 06’ 58”W |
2-6 m |
| Contrecoeur | 15780 | 45° 49’ 58”N 73° 17’ 01”W |
2-6 m |
| Varennes | 15660 | 45° 41’ 02”N 73° 26’ 39”W |
1-5 m |
| Montréal (Frontenac Street) |
15540 | 45° 31’ 43”N 73° 32’ 34”W |
1-5 m |
| Montréal (Jetty #1) |
15520 | 45° 30’ 12”N 73° 33’ 09”W |
2-6 m |
For more information, go to 
The St. Lawrence tides.
