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June 13, 2021 10:03AM
June 13, 2021 10:03AM
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Dam Emergency Action Plans (EAP)

On June 27, 2017, SB 92 became law and set forth new requirements focused on dam safety. As part of this legislation, dam owners must submit an Emergency Action Plan (EAP) to California Office of Emergency Services (Cal OES) for review and approval. Additionally, dam owners must submit updated plans and inundation maps every 10 years, or sooner under certain conditions. This legislation set forth additional provisions for emergency action plans including compliance requirements, exercises of the plan, and coordination with local public safety agencies.

What is an EAP?

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.  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 maps demonstrating critical areas for evacuation-related actions. Additionally, EAPs also provide assistance and guidance to local jurisdictions on their emergency planning for a dam failure event and identify local, state, and federal agencies with activities to ensure effective dam incident emergency response procedures and planning.

Who is required to have an EAP?

​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 California Department of Water Resources (DWR) Division of Safety of Dams (DSOD).

Which IRWD dams are required to have an EAP?

IRWD has five reservoirs with dams: Rattlesnake, San Joaquin, Sand Canyon, Santiago Creek (Irvine Lake) and Syphon reservoirs. All are required to have an Emergency Action Plan. EAPs for all five have been approved by Cal OES and will be posted here soon. 

Reservoir
Emergency Action Plan

Rattlesnake

Approved March 5, 2021

San Joaquin

Approved March 7, 2021

Sand Canyon

Approved Jan. 10, 2020

Santiago Creek (Irvine Lake)

Approved March 12, 2021

Syphon

Approved March 5, 2021

Inundation Maps

All IRWD dams have inundation maps that have been approved by the DWR Division of Safety of Dams. To learn how inundation maps are prepared, and to understand their purposes and limitations, please read this inundation mapping explainer. To download inundation maps from throughout Califorina, use DSOD's interactive tool.

Emergency Contact

In an emergency, call IRWD Operations Standby at 949-453-5300.

dam safety program what is an eap