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Title 33

Displaying title 33, up to date as of 7/15/2026. Title 33 was last amended 7/15/2026.
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Title 33Navigation and Navigable WatersPart / Section
Chapter ICoast Guard, Department of Homeland Security1 – 199
Subchapter JBridges114 – 118
Part 117Drawbridge Operation Regulations117.1 – 117.1107
Subpart AGeneral Requirements117.1 – 117.49
§ 117.1Purpose.
§ 117.4Definitions.
§ 117.5When the drawbridge must open.
§ 117.7General requirements of drawbridge owners.
§ 117.8Permanent changes to drawbridge operation.
§ 117.9Delaying opening of a draw.
§ 117.11Unnecessary opening of the draw.
§ 117.15Signals.
§ 117.17Signalling for contiguous drawbridges.
§ 117.19Signalling when two or more vessels are approaching a drawbridge.
§ 117.21Signalling for an opened drawbridge.
§ 117.23Installation of radiotelephones.
§ 117.24Radiotelephone installation identification.
§ 117.31Drawbridge operations for emergency vehicles and emergency vessels.
§ 117.33Closure of draw for natural disasters or civil disorders.
§ 117.35Temporary change to a drawbridge operating schedule.
§ 117.36Closure of drawbridge for emergency repair.
§ 117.39Authorized closure of drawbridge due to infrequent requests for openings.
§ 117.40Advance notice for drawbridge opening.
§ 117.41Maintaining drawbridges in the fully open position.
§ 117.42Remotely operated and automated drawbridges.
§ 117.47Clearance gauges.
§ 117.49Process of violations.
Subpart BSpecific Requirements117.51 – 117.1107