Dam Safety Planning Division

Hazard Mitigation
Share This Page


​Hazard Classification


​Extremely High​January 1, 2018
​High​January 1, 2019
​Significant​January 1, 2021






Cal OES EAP Review Tool_7.1.18.docx 

Santa Luisa Dam EAP 12.11.18.pdf 


Please use FEMA's Federal Guidelines for Dam Safety: Emergency Action Planning for Dams to assist and guide you in developing your EAPs. Cal OES is ready and willing to assist you through the EAP development process.

Contact Information

​​Dam Data Requests

To request dam inundation data, please submit a Public Records Act request. Please send an email to: PRA@caloes.ca.gov.

EAP Information

For other information on dam emergency action planning, please contact the Dam Safety Planning Division at eap@caloes.ca.gov.

​Jose Lara​​Chief​​Jose.Lara@caloes.ca.gov​​916-845-8883
​​Lori Newquist​Senior Emergency Services Coordinator​Lori.Newquist@caloes.ca.gov​​916-845-8275
​​Kendall Skillicorn​Senior Emergency Services CoordinatorKendall.Skillicorn@caloes.ca.gov​​916-845-8882
​Phillip Labra​Emergency Services Coordinator​​​Phillip.Labra@caloes.ca.gov​916-845-8420
​​Kamira Kit​Associate Governmental Program AnalystKasmira.Kit@caloes.ca.gov​916-845-8806


Inundation Mapping Information

For information on dam inundation mapping, please refer to the DSOD website.


Funding Opportunities

Unfortunately, the legislature did not allocate any funds to help dam owners pay for inundation maps. Cal OES is administering several grants that may be applicable; for more information please contact Steven Larson with Cal OES at PDFM@caloes.ca.gov or HMGP@caloes.ca.gov

​For Dam Stakeholders:

Message from the Division of Dam Safety, Department of Water Resources (June 2018)

The Division of Safety of Dams (DSOD) has been developing regulations for inundation maps. Emergency regulations are currently in effect, and we are concurrently working on permanent regulations. We listened to your feedback over the last several months and made changes to improve the proposed permanent regulations.

Attached is the Notice of Proposed Rulemaking that formally initiates the 45-day comment period for the proposed permanent regulations. It contains important details about how to access the documents and submit comments. The Notice is also posted on our website and the OAL Notice Register.

Since many dam owners are currently in the process of preparing maps, DSOD is taking the following steps:
1) Proposed permanent regulations allow DSOD to approve maps that demonstrate substantial compliance – this means that maps prepared under the emergency regulations should be acceptable.
2) Proposed permanent regulations are less prescriptive than the emergency regulations.
3) Emergency regulations will be readopted when they expire next month (7/18/18) with some revisions.

If you have any questions about inundation map requirements or the rulemaking process, please contact Kristen Martin at mapregs@water.ca.gov or (916) 227-2170.

DSOD - Notice of Proposed Rulemaking_06.08.18.pdf


Message from the Division of Dam Safety, Department of Water Resources (November 2017)

Senate Bill 92 added Sections 6160 and 6161 to the Water Code that became effective on June 27, 2017, requiring owners of State regulated dams, except those classified as low hazard, to prepare emergency action plans (EAPs) containing inundation map(s) for emergency preparedness. On October 19, 2017, emergency regulations were adopted to provide standards for preparing and submitting maps to the Division of Safety of Dams (DSOD) for their review and approval. These regulations are available here.

Dam owners must submit EAPs to the Governor’s Office of Emergency Services (Cal OES) for approval by deadlines that are based on the dam’s downstream hazard classification. Dam owners received letters in July identifying their dam’s hazard classification and the statutory deadlines for EAPs as shown below:

· Extremely high hazard dams: January 1, 2018
· High hazard dams: January 1, 2019
· Significant hazard dams: January 1, 2021

It is important to note that inundation maps must first be submitted to DSOD for review and approval, and only approved inundation maps should be contained within EAPs that are submitted to Cal OES for their approval.

Upon approval of the EAP by Cal OES, dam owners are responsible for ensuring that the approved EAP is disseminated to appropriate public safety and emergency management agencies, which includes DSOD. Thank you for your cooperation.

If you have any questions or need additional information, please contact DSOD at MapRegs@water.ca.gov.



01. What is an EAP and why is it important?01. What is an EAP and why is it important?<p>​An EAP is a written document that identifies potential emergency conditions at a dam and specifies preplanned actions to help minimize property damage and loss of life should those conditions occur.<br> <br>EAPs contain procedures and information that instruct dam owners to issue early warning and notification messages to downstream emergency management authorities. The document must also contain inundation map(s) demonstrating critical areas for evacuation-related actions. Additionally, EAPs:<br> <br>· Provide assistance and guidance to local jurisdictions on their emergency planning for dam failure events; and<br>· Aid local, state, and federal agencies with activities to ensure effective dam incident emergency response procedures and planning. </p>
02. Who is required to have an EAP?02. Who is required to have an EAP?<p>​Sections 6160 and 6161 of the California Water Code and Government Code Section 8589.5 require owners of state regulated dams to submit EAPs to Cal OES and the Department of Water Resources (DWR) Division of Safety of Dams (DSOD), unless the dam has been classified as low hazard by DSOD.</p>
03. What are dam hazard classifications?03. What are dam hazard classifications?<p>​The downstream hazard classifications are based solely on potential downstream impacts to life and property should the dam fail when operating with a full reservoir. These classifications are not related to the condition of the dam or its appurtenant structures. The definitions for downstream hazard classifications are based on the Federal Guidelines for Inundation Mapping of Flood Risks Associated with Dam Incidents and Failures (FEMA P-946, July 2013). FEMA categorizes the downstream hazard potential into three categories in increasing severity: Low, Significant, and High. DSOD adds a fourth category of “Extremely High” to identify dams that may impact highly populated areas or critical infrastructure, or have short evacuation warning times.</p>
04. What are the requirements if my dam is co-regulated by FERC?04. What are the requirements if my dam is co-regulated by FERC?<p>​An owner of a dam that is jointly regulated by the state and the Federal Energy Regulatory Commission (FERC) shall prepare an EAP in accordance with FERC guidelines.</p>
05. How often is a dam owner required to maintain, update, and revise an EAP?05. How often is a dam owner required to maintain, update, and revise an EAP?<p>​Dam owners shall update their EAP, including inundation map(s), at least every ten (10) years. Updates are also required when there is:<br>· a significant modification to the dam or a critical appurtenant structure, as determined by DSOD;<br>· a significant change to downstream development that involves people and property.</p>
06. Are there any other statutory requirements for jurisdictional dam owners?06. Are there any other statutory requirements for jurisdictional dam owners?<p>​Yes. At least once annually, the dam owner shall conduct an EAP notification or tabletop exercise with local public safety agencies.<br> <br>Please see the <a title="This is a link to the Division of Safety of Dams webpage" href="https://www.water.ca.gov/Programs/All-Programs/Division-of-Safety-of-Dams" target="_blank">DSOD webpage</a> for statutory requirements related to inundation mapping.</p>
07. When is my EAP due?07. When is my EAP due?<p>​Deadlines for dam EAP submissions are:<br>· On or before January 1, 2018, if the hazard classification is extremely high.<br>· On or before January 1, 2019, if the hazard classification is high.<br>· On or before January 1, 2021, if the hazard classification is significant.</p>
08. Where should I submit my EAP?08. Where should I submit my EAP?<p>​Per legislation, the development of an EAP should be based on and include an inundation map approved by DSOD. After development, dam owners must submit the EAP to both Cal OES and DSOD. </p><p> </p><p>Please submit one hard copy EAP to the Dam Safety Division:<br>Jose Lara, Chief<br>Dam Safety Planning Division<br>3650 Schriever Avenue<br>Mather, CA 95655<br> <br>Please send the electronic copy to <a href="mailto:eap@caloes.ca.gov">eap@caloes.ca.gov</a> or send on a CD to the above address.</p>
09. How should I develop my EAP?09. How should I develop my EAP?<p>​California statute requires that EAPs be developed in accordance with FEMA’s Federal Guidelines for Dam Safety: Emergency Action Planning for Dams. Government Code Section 8589.5 also requires that the EAP must include at a minimum:<br>· Notification flowcharts and contact information<br>· The response process<br>· The roles and responsibilities of the dam owner and impacted jurisdictions following an incident involving the dam<br>· Preparedness activities and exercise schedules<br>· Inundation maps approved by DWR<br>· Any additional information that may impact life or property<br> <br>As needed, Cal OES will develop additional tools and information to aid in the EAP process. <br> <br>California law also requires that EAPs be developed in consultation with any local public safety agency that may be impacted by an incident involving the dam, to the extent a local agency wishes to consult. This process/outreach needs to be documented within the EAP.</p>
10. How do I document involvement of local public safety agencies in my EAP development process?10. How do I document involvement of local public safety agencies in my EAP development process?There is no prescribed method of documenting your local public safety agency participation in your EAP development process. Some possible methods to document are:<br>1. Signature Page <br>2. Narrative explaining which agencies were consulted during development of the plan and what the contributions were<br>3. Agenda, sign-in roster, and minutes from EAP development meeting(s)
11. When does the 60 day review period begin?11. When does the 60 day review period begin?<p>​The 60 day review period begins when the Cal OES Dam Safety Planning Division receives the EAP with the approved inundation map included. If an EAP is submitted to<br> Cal OES without an approved inundation map, the review period will begin when the Dam Safety Planning Division receives the letter from DSOD that the applicable inundation map has been approved. </p>
12. I currently have an EAP. Can that be re-submitted for approval under the new requirements?12. I currently have an EAP. Can that be re-submitted for approval under the new requirements?<p>​If a dam owner has an existing EAP as of March 1, 2017, the owner can submit the inundation map within that plan to DSOD for approval. DSOD will review and may approve the inundation map if it is deemed sufficient. If DSOD approves the map, the dam owner may submit the EAP to Cal OES for review. </p>
13. Is there money available to help pay for my map?13. Is there money available to help pay for my map?<p>​Unfortunately, the legislature did not allocate any funds to help dam owners pay for inundation maps. Cal OES is administering several grants that may be applicable. For more information, please contact Steven Larson with Cal OES at <a href="mailto:PDFM@caloes.ca.gov" target="_blank">PDFM@caloes.ca.gov</a> or <a href="mailto:MHGP@caloes.ca.gov" target="_blank">MHGP@caloes.ca.gov</a>. </p><p>DSOD staff continues to research grants and will contact dam owners if a grant may be applicable to inundation maps. </p>

​Owner Education Workshop: Inundation Maps and EAPs

Cal OES and DSOD hosted an Owner Education Workshop on January 30, 2018 to discuss new requirements for inundation maps and EAPs. The Workshop recording is below:



2016 Oroville Dam Inundation Map

Most dam owners are required to prepare inundation maps as part of the dam permitting process. These maps are prepared by civil engineers on behalf of dam owners, as required under California law. Inundation maps are developed from the best available information using reasonable assumptions and standardized methods. The maps are an approximation of the maximum water flow resulting from a complete dam failure. The maps portray a catastrophic failure of the dam, as opposed to the failure a critical appurtenant structure, such as a spillway. This map represents a worst-case scenario contemplating a complete failure of the Oroville Dam. Depending upon actual circumstances, appropriate alert and evacuation areas could be more or less extensive than the simulated zones shown on the maps.

Inundation Map for Oroville Dam 2016.pdf 




California State Warning Center Dam Incident Formhttps://www.caloes.ca.gov/HazardMitigationSite/Documents/CSWC Dam Incident Form - 6.18.18.docxCalifornia State Warning Center Dam Incident FormUse this form during a dam incident, drill or actual, when reporting the incident to the California State Warning Center.Dam Emergency Action Planning1/8/2019 11:57:44 PM
Cal OES EAP Review Toolhttps://www.caloes.ca.gov/HazardMitigationSite/Documents/Cal OES EAP Review Tool_7.1.18.docxCal OES EAP Review ToolDam Emergency Action Planning8/20/2018 4:56:55 PM
Dam Division Fact Sheethttps://www.caloes.ca.gov/HazardMitigationSite/Documents/Dam Division Information Sheet - 7.1.18.docxDam Division Fact SheetDam Emergency Action Planning8/20/2018 4:55:39 PM
EAP Blank Formatting Templatehttps://www.caloes.ca.gov/HazardMitigationSite/Documents/EAP Blank Formatting Template 7.1.18.docxEAP Blank Formatting TemplateDam Emergency Action Planning8/20/2018 4:56:17 PM
EAP Elementshttps://www.caloes.ca.gov/HazardMitigationSite/Documents/EAP Elements.pdfEAP ElementsDam Emergency Action Planning2/12/2018 5:32:24 PM
EAP Review Processhttps://www.caloes.ca.gov/HazardMitigationSite/Documents/EAP Review Process.pdfEAP Review ProcessDam Emergency Action Planning2/12/2018 5:33:02 PM
Santa Luisa Dam EAPhttps://www.caloes.ca.gov/HazardMitigationSite/Documents/Santa Luisa Dam EAP 12.11.18.pdfSanta Luisa Dam EAPDam Emergency Action Planning12/11/2018 9:24:39 PM
Inundation Map for Oroville Dam 2016https://www.caloes.ca.gov/HazardMitigationSite/Documents/Inundation Map for Oroville Dam 2016.pdfInundation Map for Oroville Dam 2016Dam Safety11/28/2017 4:55:48 PM
Notice of Proposed Rulemaking_06.08.18https://www.caloes.ca.gov/HazardMitigationSite/Documents/DSOD - Notice of Proposed Rulemaking_06.08.18.pdfNotice of Proposed Rulemaking_06.08.18Division of Safety of Dams6/11/2018 10:46:52 PM
DSOD Contact Information June 2018https://www.caloes.ca.gov/HazardMitigationSite/Documents/DSOD Contact Information June 2018.pdfDSOD Contact Information June 2018Division of Safety of Dams6/26/2018 9:17:50 PM


Federal Guidelines for Dam Safety: Emergency Action Planning for Dams

Water Code §6160, 6161, 6162

Government Code §8589.5

For information on what dam-related activities may be covered under the Hazard Mitigation Assistance Program, please refer to FEMA's Analyzing the Dam Failure Hazard in the Hazard Mitigation Assistance (HMA) Program Benefit Cost Analysis (BCA).

A Guide to Public Alerts and Warnings for Dam and Levee Emergencies was created for the US Army Corps of Engineers Risk Management Center. This guidebook is for people involved with providing emergency messages and information to the public during times of impending flooding from dams and levees. 

On January 30, 2018, DWR and Cal OES hosted an Owner Education Workshop about Inundation Maps and EAPs. You can find the workshop recording at https://youtu.be/_VYTeFcNIIs.

​Whether Drought or Storms, Folsom Dam is a Multi-Purpose Facility




EMAP Certifiedhttps://www.caloes.ca.gov/NewsMediaSite/PublishingImages/Forms/DispForm.aspx?ID=85EMAP Certified2018-10-16T20:41:00Z<a href="http://www.emap.org/" target="_blank" title="Emergency Management Accrediation Program"><img alt="" src="/_layouts/15/IMAGES/icgen.gif" />Emergency Management Accrediation Program</a>04
Register to Vote Footer Bannerhttps://www.caloes.ca.gov/NewsMediaSite/PublishingImages/Forms/DispForm.aspx?ID=15Register to Vote Footer Banner2015-04-02T16:41:00Z<a href="http://www.sos.ca.gov/elections/voter-registration/" target="_blank" title="Register to Vote!">http://www.sos.ca.gov/elections/voter-registration/</a>02
Save Our Water Footerhttps://www.caloes.ca.gov/NewsMediaSite/PublishingImages/Forms/DispForm.aspx?ID=16Save Our Water Footer2015-04-02T16:45:00Z<a href="http://saveourwater.com/" target="_blank">Link to Save Our Water</a>04
If Called Conserve Footer Bannerhttps://www.caloes.ca.gov/NewsMediaSite/PublishingImages/Forms/DispForm.aspx?ID=14If Called Conserve Footer Banner<a href="http://www.energy.ca.gov/" target="_blank" title="California Energy Conservation">http://www.energy.ca.gov/</a>10

Supporting Page