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What is a controlling depth and why does it matter?

Steve Conley | August 24, 2026

Short Answer

Controlling depth is the shallowest depth in a canal, usually at the entrance where it meets the bay or ocean. It determines what size boat can access your property. Shallow canals may only accommodate flats skiffs, while deep-water canals can handle large sport fishing yachts.

Controlling depth is the shallowest depth in a canal, usually at the entrance where it meets the bay or ocean. It determines what size boat can access your property. Shallow canals may only accommodate flats skiffs, while deep-water canals can handle large sport fishing yachts.

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Steve Conley

Steve's Advice

Steve Conley

Principal, Conley Sales Group at COMPASS

Controlling depth is the shallowest point between your dock and open water. A property can have 8 feet at the seawall but only 2 feet at the canal mouth. I always tell buyers to test the route at low tide before buying. A beautiful home means nothing if your boat cannot get out.

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