Flood Information & Assistance

Mailing Address:
9521 Tilley Rd. SW
Olympia, WA 98512

Phone: (360) 867-2800
Fax: (360) 867-2811

Email Webmaster

Updated:  November 28, 2018 08:55 AM

Be prepared for flood season.  Find information and assistance here.

River Gage Graphs

Find information on rivers in Thurston County. Observed and predicted flow graphs, as well as information and historical data.

Telephone Alert System

The Telephone Alert System is an optional service to give river plain residents information on impending floods. Subscribers can receive notices on the Chehalis, Deschutes, Nisqually and Skookumchuck Rivers.

Sandbagging Information

Information on sandbagging, including guidance for placing, estimating quantity and availability of sandbags in the Thurston County.

Thurston County Environmental Monitoring Program

The Environmental Monitoring Program monitors the condition of water resources in the county. The program collects data from various sources to help residents prepare for floods and other natural disasters.

Online Flood Map Amendment Request

A tool for property owners to request a Leter of map amendment (LOMA), if they think their property has been inadvertently mapped in a Special Flood Hazard Area.

Thurston County Public Health

This Thurston County Public Health link provides information on flood-related health issues and cleanup guidelines, as well as other information that can be useful when flooding occurs.

Winter 2011 Groundwater Flooding Information (pdf)

Fall 2015 Thurston County Flood Bulletin (pdf)