US Army Corps of EngineersBUILDING STRONG®

Mouth of the Columbia River (MCR) Jetties Laura HicksChief, Planning and Project Management Branch

Pacific Northwest Waterways AssociationJune 27-29, 2011

BUILDING STRONG®PORTLAND DISTRICT

Purpose: Project Functions

Stabilize deep-draft navigation channel through a regionally significant ocean inlet

Provide protection from waves and currents for all navigation

Minimize dredging requirements of channel

Minimize structure repair frequency and magnitude

BUILDING STRONG®PORTLAND DISTRICT

Functioning Jetties at the MCR support the following:

$17 billion in international trade

45 million tons of cargo1

3,500 cargo vessel crossings1

1,600 crossings at greater than 30 feet1

The lives of mariners and fishermen

More than 40,000 maritime-related jobs

1Data from Waterborne Commerce of the United States, 2008

MCR Jetties Major Rehabilitation

North Jetty 2.5 miles long 1914-1917

Peacock Spit

Pacific Ocean

Columbia River Estuary

Clatsop Spit

South Jetty 6 miles long 1885-1913

Jetty “A” 1 mile long 1938-39

Sand Island pile dikes 1930-1935

Pacific

Ocean

Baker Bay

Clatsop Spit

Peacock Spit

Washington

Oregon

Sand Island

Ilwaco

AstoriaHammond

Chinook

Jetty “A”

Long Beach

North Head

Columbia River Estuary

N

Pacific

Ocean

Baker Bay

Clatsop Spit

Peacock Spit

Washington

Oregon

Sand Island

Ilwaco

AstoriaHammond

Chinook

Jetty “A”

Long Beach

North Head

Columbia River Estuary

NN

MCR North Jetty - Construction and Repair History

1917

1939

1965 2005

(Receded approximately 1800’ in length since 1916.)

MCR South Jetty - Construction and Repair History

1906-1913 1886-1895

1931-1936

1961- 1962

1982

2006

2007

(Receded approximately 4500’ in length since 1913)

Base Condition

Dune Augmentation/Stabilization• South Jetty Root & Trestle Bay• Letter Report, P&S, Beach Material Placement

BUILDING STRONG®PORTLAND DISTRICT

South Jetty: The Observed Historic Movement of the Shoreline

Dec. 2009

Apr. 2010

Jan. 2010 Apr. 2010

Note the shoreline in relative to thetree line.

May 2010 Dec 2010

Note the shoreline in relative to thetree line.

Major Maintenance Report

North Jetty Lagoon and Wetland Fill

► Detailed Design Report, Plans & Specifications, Award Contract

► Loss of 1.8 acres of wetlands and 4.70 acres of waters of the US.

► Locating and developing mitigation site.

► Redirecting stream away from lagoon wetlands.

• Replacing Jetty Road culvert

North Jetty Lagoon and Wetland Fill

Features North Jetty

Timing of construction 2013-2014

Material used for fill Sand, gravel, quarry stoneShort-term and long-term use

Stockpile area, long-term stabilization of root

De-watering Culvert feeding into area will be replaced

Impact on wetlands 1.14 acresImpact on Section 404 waters 8.02 acres

Major Maintenance ReportNorth Jetty Critical Repairs STA 86 – 99

BUILDING STRONG®PORTLAND DISTRICT

Major Maintenance ReportNorth Jetty Critical Repairs STA 86 – 99

Action FY 2013Contract

FY 2013E&D and

S&A

FY2014E&D

and S&A

TotalCost

1 N. Jetty Lagoon Fill $9.72M $1.12M $0.57M $11.4M

2N. Jetty, Reaches 1, 2 & 3:Stations 86-99

$12.7M $1.45M $0.76M $14.9M

3 N. Jetty, Reach 1:Stations 86-92 $6.75M $0.77M $0.4M $7.93M

4

N. Jetty, Reaches 1 & 3:Stations 86-92 & 96-99

$10.6M $1.22M $0.63M $12.5M

Construction Schedule

BUILDING STRONG®PORTLAND DISTRICT

Major Rehabilitation Report

Status: Draft IEPR report complete SRB model disapproved HQUSACE issuing memo regarding model disapproval Based on a draft memo, district developed a path forward

BUILDING STRONG®PORTLAND DISTRICT

Major Rehabilitation Report

Path Forward: Break planning model into distinct pieces, separating hazard

functions, quantities, cost estimates, progressive damage calculations, etc.

Hire a professional Matlab programmer to work collaboratively with coastal engineer to document and rewrite code.

Coordinate with Division and HQUSACE vertical team to sign off on plan to obtain MRR approvals.

Timeline: Complete updated MMR and engineering analysis by 30 Nov 2011