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New York State Canal Corporation

Notice to Mariners

Erie Canal – Tonawanda/Pendleton

August 11, 2023


Mariners are advised that the placement of herbicide is scheduled to begin on Monday, beginning of business, August 14th between Ellicott Creek and Tonawanda Creek Bridge (E-240). The work should be completed by Friday, August 18th Any swimming in the canal is absolutely prohibited in the treatment area until one day after the application of the herbicide.

During this treatment, lockages at Lock 34/35 (Lockport) will be on the following schedule:

8:00 a.m., 10:00 a.m., 10:45 a.m., 12:30 p.m., 1:15 p.m., 3:00 p.m., 3:45 p.m., 6:00 p.m., and 8:00 p.m.

Mariners should reduce speed, stop all forward motion and proceed at a "No-Wake" speed when transiting this area.

Due to active water management intended to minimize the current in Tonawanda Creek during treatment, the water level between Lock E-34 (Lockport) and the Genesee River in Rochester could be reduced.

Visit for more information including details about the herbicide, project-specific updates, and ways to get involved in the management of hydrilla.

The profiles of the canal system can be found at

A chart covering the western portion of the treatment area can be found at

Maps covering the entire treatment area can be found at &

In case of emergencies, please call the Canal Corporation Emergency Call Center at: (833) 538-1042.

The Canal Corporation urges all users to register to receive updates through the "Notice to Mariners" notification program at                         

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