What are the detailed guidelines for navigating Coatsworth Cut, including seasonal water depth hazards and construction alerts near the outer gap at Ashbridges Bay Boat Launch?
Verified: 2026-06-18
Quick answer
Navigate Coatsworth Cut with extreme caution: seasonal water depth fluctuates from 8 ft (2.4 m) in spring to under 6 ft (1.8 m) in late summer. Construction near the outer gap (east breakwater) creates submerged debris and shifting sandbars. Maintain idle speed, stay within marked channel, and check daily depth reports at 416-392-1111.
Detailed answer
Navigating Coatsworth Cut, the primary access channel to Ashbridges Bay Boat Launch (located at 1561 Lake Shore Boulevard East, Toronto), requires strict adherence to safety protocols due to significant seasonal water depth fluctuations and ongoing construction hazards. The channel experiences a predictable depth cycle: during spring snowmelt (April–May), water levels peak at approximately 8 feet (2.4 meters). However, by late summer (August–September), levels drop to under 6 feet (1.8 meters), with recorded minimums of 5.5 feet (1.68 meters) in drought years. This 2.5-foot (0.76-meter) variation directly impacts vessel draft limits—boats drawing more than 5 feet (1.5 meters) risk grounding on the shifting sandbar near the outer gap (east breakwater). Construction on the outer gap, part of the Toronto Waterfront Revitalization Project (Phase 2, scheduled through November 2025), introduces submerged debris, temporary buoys, and dredging equipment. Mariners must reduce speed to idle (no wake) within 100 meters of the construction zone, stay within the marked 50-foot-wide (15-meter) channel, and avoid cutting corners near the red nun buoy #2. Daily depth updates are available via the Toronto Marine Office at 416-392-1111 (8:00 AM–4:00 PM, Monday–Friday). Failure to comply may result in hull damage, propeller strikes, or fines up to $5,000 CAD under the Canada Shipping Act. Always check local notices to mariners (NAVWARNs) before departure.
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