Floodplain Management

Flood Hazard Zoning District or Flood Hazard Overlay Zone - Trinity County's Floodplain management ordinance

Flood Insurance Rate Map and Flood Zone Information - View a summary of services provided by the County

Trinity River Flood Insurance Study

Flood Safety Brochure

Elevation Certificates Information: 
The Planning Department does keep Elevation Certificates on file for some properties within Trinity County. To see if one is available for your property contact County staff for assistance:

Email: info.planning@trinitycounty.org
Phone: 530-623-1351

Revised Flood Insurance Rate Maps for Trinity County are available at the following links by entering your parcel number or address:

FEMA’s National Flood Hazard Layer

FEMA’s Map Service Center

Trinity County Parcel Viewer
Use this link to view an overlay of FEMA’s flood hazard zones for your property in three steps:
1. Click Trinity County Parcel Viewer link, above.
2. After reading the Disclaimer page, click Trinity County Parcel Viewer application link at the bottom of the page.
3. Enter your address in the blue text box on the open application to view an overlay of FEMA’s special flood hazard areas that may affect your property.

Trinity County Water Resources - Water Resources Information for Parcels in Trinity County

Flood Protection Information Resources

Federal Emergency Management Agency - Access this site for general information regarding emergency preparedness.

FloodSmart - This is the official site of the National Flood Insurance Program and provides information regarding flood risk assessment, understanding flood maps, differences between commercial and residential flood insurance coverage, flood insurance resources, and information about the National Flood Insurance Program.

USGS Water Watch Stream flow Map - Access this site for stream gauge data including drainage area, discharge, stage, % normal flows in real time.

California Nevada River Forecast Center - Information on this site supports Water Watch Stream flow Data and provides a “Quantitative Precipitation Forecast” that predicts how much precipitation to expect for the next 120 hours.

California Data Exchange Center - The CDEC installs, maintains, and operates an extensive hydrologic data collection network including automatic snow reporting gages for the Cooperative Snow Surveys Program and precipitation and river stage sensors for flood forecasting.