Gov. Code, § 39901

A city whose limits include or bound upon a harbor, bay, estuary, or other navigable body of water may:

(a) Establish, acquire, construct, improve, and maintain in, upon, and along the body of water, piers, docks, wharves, bulkheads, quays, and other necessary works.

(b) Construct, improve, dredge, deepen, or straighten, channels, turning basins, canals, slips, and waterways to, from, and along such works and connecting with any other navigable water within or without the city limits.

(c) Do any thing necessary or convenient to the establishment, improvement, conduct, and maintenance of a harbor, and in furtherance of commerce and navigation.

This section does not affect or limit a person’s use and enjoyment of property rights, nor grant a city the right to destroy, injure, impair, or interfere with any private or quasi-public property or property rights, leasehold, or otherwise, or to the use and enjoyment of the property.