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Chehalis River Basin Flood Authority Education and Outreach Subcommittee. Actions and Activities Benefiting the Basin 10:00 a .m., April 15, 2013 Lewis County Board of Commissioners. Today’s Presentation. Raise awareness Encourage discussion Key messages we’d like to leave you with . . . - PowerPoint PPT Presentation
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Chehalis River Basin Flood AuthorityEducation and Outreach Subcommittee
Actions and Activities Benefiting the Basin
10:00 a.m., April 15, 2013
Lewis County Board of Commissioners
2
Today’s Presentation
Raise awareness
Encourage discussion
Key messages we’d like to leave you with . . .
1. Broad agreement -- For the first time in a century there is broad agreement across the Basin on next steps to reduce flood damage and enhance salmon runs in the Basin.
2. Basin-wide strategy -- A Basin-wide strategy is needed to protect communities along the river and enhance salmon runs.
3. Flood Authority -- Positioned to continue be a galvanizing force in the Basin to collaboratively implement tools and projects.
Discussion
April 2013
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Chehalis River Basin Flood Authority
April 2013
Grays Harbor County Lewis County Thurston County City of Aberdeen
City of Napavine City of Oakville Town of Pe Ell Town of Bucoda
Formed in 2008
Formal body focused on: (1) flood hazard mitigation throughout the Basin; and (2) decision-making that is . . . informed by science. protective of Basin residents/communities. environmentally appropriate.
Basin jurisdictions represented City of Centralia City of Chehalis City of Cosmopolis City of Montesano
4April 2013
2007 Flood -- $938M Basin-wide damage, $300M lost economic activity (WA)
City of Centralia STEVE RINGMAN / SEATTLE TIMES
Exit 77 (I-5) in Chehalis STEVE RINGMAN / SEATTLE TIMES
Background
Photos Source: LEWIS COUNTY,DIVISION OF EMERGENCY MANAGEMENT
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Ranked high flow events (1932 - 2012) . . . I-5 closed 1990, 1996, 2007, 2009. Five largest events since 1986 -- Frequent floods are getting worse and
damage is increasing . . . Chart -- Chehalis River Flow Rates near Grand Mound (cubic ft./sec.)
April 2013
1932
1934
1936
1938
1940
1942
1944
1946
1948
1950
1952
1954
1956
1958
1960
1962
1964
1966
1968
1970
1972
1974
1976
1978
1980
1982
1984
1986
1988
1990
1991
1993
1995
1996
1998
2000
2002
2004
2006
2008
2010
2012
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
913
7
1311
6
16
10
4
3
8
2
12 15
1
5
Background
6April 2013
Background
Response and recovery is expensive, takes time, and may not be fully achieved (at least on a near-term time scale) . . .
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Chehalis is the second largest river basin in the state, rich in natural resources . . .
April 2013
Background
Upper Chehalis (5/31/2010) JAMES E. WILCOX / WILD GAME FISH CONSERVATION INTERNATIONAL
www.chehalisbasinpartnership.org
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Need -- Strategy, Action, Tools . . .
April 2013
Strategy = Basin-wide Solution
A. Significant reduction in flood damage.
B. Solving one’s problems doesn’t increase another’s.
C. Maintain focus in five areas:1. major capital projects.
2. localized projects.
3. land use management.
4. fish and habitat enhancements.
5. flood warning, emergency response.
William D. Ruckelshaus Center
9April 2013
2012 Capital Budget:
1. $5.0M – Local projects.
(Lewis County = $1,983,974)
2013 Proposed Budget:
2. $10.7M -- Local projects.
3. $9.2M -- Design evaluations by 2014 for Upper Basin dam (~$5.6M) and I-5 protection (~$3.4M).
4. $4.3M -- Fish and habitat enhancements.
5. $1.8M -- Local programs (buyouts, flood proofing, home elevations).
6. $2.2M – Implementation capacity, technical experts.
Action – Capital Projects (2012, 2013)(Scroll down to “Chehalis Basin -- Projects Funded, Projects Proposed for Funding”)
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Action – Spotlighting Other Key Projects
April 2013
I-5 - Mellen Street to Blakeslee Junction Dedicated collector/distributor lanes to improve local
mobility, enhance safety and improve access to hospital, airport, etc.
Airport road culverts to drain flood waters away from Chamber Way.
http://www.wsdot.wa.gov/projects/i5/mellentograndmound/phase3/
Visualization and Photo Source: WASHINGTON STATE DEPARTMENT OF TRANSPORTATION
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Tools -- Flood Warning System
www.chehalisriverflood.com
April 2013
Front-facing website.
Back-end data collection, data synchronization.
Improves forecasting and early-warning.
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Tools -- Flood Warning System
April 2013
Localized tracking, forecasting . . . www.chehalisriverflood.com
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Tools -- Flood Warning System
April 2013
Localized tracking, forecasting . . . www.chehalisriverflood.com
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Tools -- Hydraulic Analysis Model
Science-based model to inform decision-makers on hydraulic effects of potential flood relief options (at basin-wide and localized scales).
April 2013
Covers mouth of Chehalis River upstream to Pe Ell (108 miles).
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Tools -- Hydraulic Analysis Model
April 2013
Example: Basin-wide effects analysis (Chehalis Basin Flood Hazard Mitigation Alternatives Report 12/2012)
Table 1 (pg.70) -- “Mainstem Dam, Upper Chehalis”
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Tools -- Fish Studies
Two significant fish studies conducted in Upper Basin (WRIA 23).
1. Analyze effect of dam alternatives on Spring Chinook, Steelhead and Coho.
2. Prioritize potential fish habitat enhancement opportunities.
Initial and preliminary projections . . .
April 2013
Species Multi-Purpose Dam
Flood Control-Only Dam
Fish Habitat Enhancement
Measures
Spring Chinook 20% 4% likely same as Coho
Steelhead 7% 11% likely same as Coho
Coho 1% 1% 4-5%
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Resources, Additional Information
Visit Flood Authority Web Library!
Legislature (4/15/2013):
SHB1089 (Sec. 1077 and 1078)
SSB5035 (Sec. 1075)
April 2013
www.ezview.wa.gov
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Thank You!
April 2013
Vickie Raines, Chair
Chehalis Basin Flood Authority
360/590-4100
Scott Boettcher, Staff
Chehalis Basin Flood Authority
360/480-6600
Edna Fund, Chair
Education and Outreach Subcommmittee (Flood Authority)
360/269-7515
Karen Valenzuela, Vice-Chair
Chehalis Basin Flood Authority
360/786-5440
