FEMA Floodplain Mapping

About the Project

  • The Flood Control and Water Conservation District is collaborating with FEMA through the Cooperating Technical Partners (CTP) Program in order to maintain up-to-date floodplain mapping and other flood hazard information within Placer County. The main objective of the program is to provide new or improved 1 percent annual chance floodplain, or 100-year, mapping of major creeks within developing areas of the County.
  • Through three CTP efforts, over 120 miles of new or updated mapping will be provided in urbanized areas of the County.
  • The creeks to be studied were prioritized through the District Technical Advisory Committee (TAC) consisting of member agency staff that identified the need for new or updated areas of floodplain mapping.
  • The District often leads the initial hydrologic studies which serve as the basis for the updated or new mapping produced separately by FEMA’s mapping contractors.
  • District staff have been providing regular updates regarding the CTP process to the District Board and cooperating member agencies at public Board of Director meetings.
  • Placer County is the first jurisdiction to receive the new FEMA Digital Flood Insurance Rate Map (DFIRM) format which replaces the current paper map format. The DFIRMs are being released simultaneous to the CTP mapping studies depicting the new or updated 1 percent annual chance floodplain.


  • FEMA CTP Mapping in Western Placer County (PDF)
  • FEMA CTP Mapping in Lake Tahoe Area (PDF)
  • View a floodplain interactive map that allows user to search by address throughout Placer County including incorporated cities. To view the FEMA mapping information at your address/parcel:
    • Enter your address in the search box on the top right corner Search Box Image
    • Once you have selected your parcel, open the layers by selecting the check box tab. Then click on the '+' sign to expand the Hydrology and Environment layer group.
    • Check the box for floodplains and adjust layer opacity with the slider. You may also want to view the city limits within the Political layer group, or aerial views.
  • Attend a Public Outreach Meeting on August 7, 2018 from 5:30 to 7:30 p.m. for more information. Meeting will be held in meeting rooms 1 and 2 at the Maidu Community Center located in Roseville.

Contact the Project Manager 

Contact Brad Brewer for more information.

Contact District Member Agencies with Mapping Questions

Area Email Phone
Auburn Email Derrick Whitehead
530-823-4211, ext. 142
Lincoln Email Ronald Neufeld
Loomis Email Brit Snipes
Placer County
Email Mary Keller
Rocklin Email Ashley Kettenhofen
Roseville Email Brian Walker