LawWiki
HomeCodesSearchGlossaryAPIAbout
LawWiki

Plain English summaries of California law with zero-hallucination AI. Every summary is verified against official source text.

Product

  • Search
  • Codes
  • About

Legal

  • Privacy Policy
  • Terms of Service
  • Disclaimer

© 2026 LawWiki. All rights reserved.

HomeHarbors and Navigation CodeDiv. 1.5Ch. 2§ 100 Navigable Waters Floodwaters Definition

§ 100 Navigable Waters Floodwaters Definition

Harbors and Navigation Code·California
AI Summary·Official Text·Key Terms·Related Statutes·References
AI SummaryVerified

§ 100 Navigable Waters Floodwaters Definition

This law says regular rivers and streams are public for boats, but when floodwater spills over the banks onto private or public land, that water isn’t considered public and you can’t go onto the land.

Key Takeaways

  • •Normal rivers and streams are public ways for boats and transport.
  • •Floodwater that goes above the normal high‑water mark onto land is NOT public water.
  • •You can’t use that floodwater as a reason to walk or drive onto private or public land.

Example

During a big flood, a boat driver follows the water onto a farmer’s field that’s normally dry.

Even though the water is flowing, the law says the floodwater over the normal high‑water line isn’t public water, so the driver is trespassing on the farmer’s land.

AI-generated — May contain errors. Not legal advice. Always verify source.

Official Source
View on CA.gov

§ 100 Navigable Waters Floodwaters Definition

Navigable waters and all streams of sufficient capacity to transport the products of the country are public ways for the purposes of navigation and of such transportation. However, the floodwaters of any navigable river, stream, slough, or other watercourse while temporarily flowing above the normal high-water mark over public or private lands outside any established banks of such river, stream, slough, or other watercourse are not navigable waters and nothing in this section shall be construed as permitting trespass on any such lands. For the purposes of this section, “floodwaters” refers to that elevation of water which occurs at extraordinary times of flood and does not mean the water elevation of ordinary annual or recurring high waters resulting from normal runoff. (Amended by Stats. 1972, Ch. 1072.)

Last verified: January 11, 2026

Key Terms

navigable watersfloodwatersnormal high-water marktrespass

Related Statutes

  • § 268 Local Vessel Operation Permits
  • § 101 Navigable California Waters List
  • § 102 California Navigable Waters List
  • § 103 Public Navigable Waterways List
  • § 104 Navigable Waterways Public Access

References

  • Official text at leginfo.legislature.ca.gov
  • California Legislature. Harbors and Navigation Code. Section 100.
View Official Source