US Army Corps of EngineersBUILDING STRONG®

Anderson/Ketron Disposal Site

Studies and Permitting Update

Lauran WarnerDredged Material Management Office

Seattle District

28 Jan 2016

Puget Sound Disposal Sites

About the A/K SiteNon-dispersive

Areas with peak 1% bottom current speeds less than 25

cm/second

Areas with peak 1% bottom current speeds less than 25

cm/second

In water depths between 120 and 600 feet

In water depths between 120 and 600 feet

Greater than 2500 feet from biological resources

Greater than 2500 feet from biological resources

Greater than 2500 feet from shoreline

Greater than 2500 feet from shoreline

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About the A/K Site

A Pierce County shoreline permit is required to maintain the use of the A/K site

Site is currently closed and not accepting dredged material due to expiration of current permit.

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Nisqually Reach Aquatic Reserve

established in 2011

Site reassessment: Were original

studies for site placement accurate?

Changes in benthic community since

1987?

A/K Site Trawl Study

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Trawl Study Findings

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Trawl Study Area

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Dungeness Crab

Study area: 2x more crab than in 1987

Scarce on site in both studies

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“Rock Crab”(C. productus and C. gracilis)

Much more abundant in 2015 that 1987

Graceful crab widespread and abundant

Red rock crab less common than smaller graceful crab; scarce on site

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Rock Crab DensityJuly 2014

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Cancer gracilis Cancer productus depth (m)

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Pandalid Shrimp

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Pandalid Shrimp

Much more abundant in 2015 than in 1987

Spot shrimp scarce on site

Primarily pink shrimp on site

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on-site stations

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DMMP Disposal Sites:Coming Attractions

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Status of DMMP Disposal Sites:

DispersiveSites

Cumulative Volume (cy)

Average Annual Volume (cy/yr)

JurisdictionShoreline

PermitStatus

Grays Harbor(Point Chehalis &

South Jetty)28,598,846 1,429,942 Grays Harbor

Countyexpires

Dec. 2016

Willapa Bay (Cape Shoalwater &

Goose Point)457,072 Not used

since 2006 Pacific County expires April 2017

Port Angeles 22,344 Used onlyonce, in 1996 City of PA expires

May 2016

Port Townsend 54,777 2,107 Clallam County expired

Rosario Strait 2,207,161 84,891 Skagit County ≥ 5 years

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Status of DMMP Disposal Sites:

Non-DispersiveSite

Cumulative Volume (cy)

Average Annual Volume (cy/yr)

JurisdictionShoreline

PermitStatus

Commencement Bay 8,216,022 304,297 Pierce County expires

Sept. 2016

Port Gardner 3,337,198 123,600 City of Everett ≥ 5 years

Elliott Bay 3,030,788 112,251 King County ≥ 5 years

Anderson/Ketron 157,215 6,047 Pierce County expired

Bellingham Bay 78,883 No disposal since 1998

Whatcom County expired

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Pierce County Disposal Sites

Commencement Bay & Anderson/Ketron both need Shoreline Permit renewals

Updated Shoreline Management Plan still undergoing Ecology review

With ESA consultation complete, moving forward; can’t wait for updated shoreline management plan

Monitoring?Site:

(Monitoring Soft Triggers)

A/K(300 kcy)

CB(500 kcy)

EB(500 kcy)

PG(500 kcy)

BB(300 kcy)

Last Monitoring

date(s)Partial 2005 Full 2007

SPI 2013 Partial 2013 Tiered-Full 2010 Partial 1993

Cumulative volume since

last monitoring

event

129,776 452,110 117,593 194,018 46,000

DY16 Monitoring none ? none none none

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Questions?