2009 California Water Code - Section 8125-8129 :: Article 4. Improvement Of Non-navigable Streams

8125.  "Non-navigable streams," as used in this article, means
streams and washes in a county which are not declared by law to be
navigable and which are not in fact navigable for commercial
purposes.

8126.  The board of supervisors may provide for widening, deepening,
straightening, removing obstructions from, and otherwise improving
non-navigable streams the overflow of which interferes with highways,
and for protecting the banks and adjacent lands from overflow of
non-navigable streams.

8127.  The board may make regulations for the use of the streams and
the repair and control of the works.

8128.  No regulations of the board nor improvements directed by it
to be made shall in any manner interfere with the private rights or
privileges of riparian owners, miners, or others.

8129.  Whenever, in the opinion of the board of supervisors, the
general fund is insufficient to defray the cost of the improvements
provided for under this article, the board may levy a tax or contract
a bonded indebtedness therefor in the manner provided by Title 3 of
the Government Code.