March 1995, Slide Presentation, Portuguese Bend Abalone Cove Shoreline, Restoration of Intertidal and Subtidal Habitats VIN210.411V3 SICRIHA SOlVd OHDNIV21
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PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION ,
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EQRTLIGUESE BEND / ABALONE �liff4ig„ 7., . nv
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PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
EHE DAMAGE AT
ORTUGUESE BEND IN PERSPEC _. ._.. _ .
* COMPARISON OF THE EXXON VALDEZ OIL SPI ''
VERSUS THE PORTUGUESE BEND BLUFF EROSION
• EXXON VALDEZ ENVIRONMENTAL DAMAGE IS
ESTIMATED TO BE $4 BILLION
• PORTUGUESE BEND / ABALONE COVE LANDSLIDE
DEBRIS DAMAGE OF THE COASTAL ENVIRONMENT
EXCEEDS $4 BILLION BASED ON ORGANISM
REPLACEMENT COST
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RANCHO PALOS VERDES. CALIFORNIA
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PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
I
• IDENTIFY THE MARINE ENVIRONMENTAL DISASTER
THAT SHORELINE EROSION HAS CAUSED AS A REA
ENVIRONMENTAL DISASTER
fi
•
• HELP OBTAIN THE APPROVAL FOR THE RESTORATI + �
OF THIS SUBTIDAL MARINE ROCKY SHORE AND SAND
BOTTOM HABITAT
lb SEEK TO RESTORE THE PRE-1956 ENVIRONMENT BY
SUPPORTING PERMANENT SHORE PROTECTION
• CREATE A PERMANENT COASTAL HABITAT FOR
KNOWN SENSITIVE SPECIES AND OTHER FISH AN
WILDLIFE
RANCHO PALOS VERDES, CALIFORNIA
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ENVIRONMENTAL RESTORATION
LANDSLIDE
ABATEMENT STATUS
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RATE OF MOVEMENT
FEET PER YEAR
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PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
OW CAN IT BE DONE filo•!:' .
rf' ws r y
BY OBTAINING THE CONSTRUCTION FUNDING FROM TH
PORTS WITHOUT TAX DOLLARS FOR THE ENVIRON . *:
RESTORATION BY: �
SPECIFYING THAT RESTORATION OF INTERTIDAL A -
SUBTIDAL HABITAT AT PORTUGUESE BEND 1 ABA •
COVE MEETS FISH AND WILDLIFE SERVICE'S
MITIGATION POLICY
• DIRECTING THAT THE PORT OF LOS ANGELES CAN
THIS ENVIRONMENTAL RESTORATION AS MITIGA17 : .: k
CREDIT FOR THE AQUATIC HABITAT LOSSES
ASSOCIATED WITH ITS EXPANSION
RANCHO PALOS VERDES, CALIFORNIA
PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
}
• GABIONS SEVERELY DAMAGED BY STORMS
COUPLED WITH HIGH TIDES IN 1991 3;
• SINCE 1992 GABIONS NO LONGER EFFECTIVE AS
SHORE PROTECTION DUE TO DESTRUCTION BY
STORMS (SEE FIGURE III)
• SLIDE DEBRIS (MUD AND ROCKS) AGAIN COVER
THE SUBTIDAL AREA ..
• KELP BEDS HAVE DISAPPEARED
• ROCKY SUBTIDAL HABITAT NO LONGER VISIBLE
IN RESTORED AREA
• BLUFF AREA VOID OF VEGATATION
RANCHO PALOS VERDES, CALIFORNIA
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Recfo01 tar we
erRecta tde and M baskets filled with local rocks from the
rred together plonk► the beach to prevent wave
erosion of the bluffs for a distance of apprnrimatel, 800 feet
PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
= AhCY H R
t'3� S C3 E
R LAMENT KELP- T 1956
NVI CaC7
• .
• .
PRE...: �.wM. .. IER KELP-ROCK REEF HABITAT FOR MARIN
ORGANISMS
• PRISTINE TIDEPOOLS
••
CLEAR NEARSHORE WATERS / ABUNDANCE O
ROCKY INTERTIDAL HABITAT
•
• RECREATIONAL DIVING AND FISHING
{
• COMMERCIAL FISHING trr
RANCHO PALOS VERDES CALIFORNIA
PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
ESTORATION -
. „
,. ,
IVIARINE ENVIRONMENT
,,
• 1 .904 ACRES OF PRIME COASTAL WATERS
DEVASTATED
• 12 ACRES REQUIRED TO CONSTRUCT SHORE
PROTECTION
x ,892 ACRES OF SANDY AND
ROCKY SUBTIDAL AND INTERTIDAL
HABITAT RESTORED NATURALLY
. ,
RANCHO PALOS VERDES/ CALIFORNIA
PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
R I. F T 11
VIRONMENTA
L
• MAINTAIN NATIVE SPECIES HABITAT FOR BOTH FLORA ,
AND FAUNA LORA ,.
• OPPORTUNITY TO ESTABLISH PERMANENT HABITAT FOR
KNOWN SENSITIVE SPECIES (i.e., Black Tailed Gnatcatcher)
• HUNDREDS OF ACRES OF COASTAL LAND AVAILABLE
FOR SENSITIVE SPECIES HABITAT LE.
• HUNDREDS OF ACRES OF COASTAL LAND COULD B
USED FOR RECREATIONAL PURPOSES '
• ENHANCE THE APPEARANCE OF THE SCARRED
LANDSCAPE
RANCHO PALOS VERDES, CALIFORNIA
PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
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SHORE PROTECTION WILL
$41:4
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• ESTABLISH ENDANGERED SPECIES HABITAT
PREVENT BLUFF EROSION
fm-
55/ f'
F` ATE RECREATIONAL ASSETS
ii
• REDUCE CITY ROADWAY MAINTENANCE
EXPENDITURES3,
• ELIMINATE BLIGHT., HAZAHDb
•
RANCHO PALOS VERDES. CALIFORNIA
PORTUGUESE BEND / ABALONE COVE 0 ,.
ENVIRONMENTAL RESTORATION
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MPROVEMENTS ,
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STABILIZATION s-
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.:• STREET ACCESS CAN BE MAINTAINE $
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EXISTING UTILITIES MAINTAINED ,;'
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PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
PO ARS SHORE _ F ; -- 10 \
� S FIRST INSTALLED IN l988(See Figure 4
• HIGHLY EFFECTIVE IN PREVENTING BLUFF EROSION
• NATIVE VEGETATION IS REESTABLISHED ON SLOPES
• EXISTING INTERTIDAL MUD AND SLIDE DEBRIS ARE WASHED AW
BY CURRENTS
• GABIONS HIGHLY EFFECTIVE FUR
CLEARING NEAR SHORE WATERS
• CLEAR WATERS RETURN TO AREA IN FRONT OF GABIONS
• KELP BEDS REAPPEAR
• ROCKY INTERTIDAL HABITAT BEGAN TO REAPPEAR
RANCHO PALOS VERDES, CALIFORNIA
PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
4400 4,,
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SOIL ON THE SLIDE PLANE CREATES
FORCES THAT CAUSE MOVEMENT .
- .
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• MOVE EARTH FROM AREAS THAT CREATE
I: ' MNG FORCES
• MOVE EARTH TO AREAS THAT CREATE''
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RANCHO PALOS VERDES, CALIFORNIA
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ENVIRONMENTAL RESTORATION
� .
CE DRAINAGES
}
• ALL CANYON DRAINAGE PRIOR TO 19
FLOWED DIRECTLY INTO THE GROUNDWAtER
SYSTEM VIA FISSURES
• DRAINAGE SYSTEM REESTABLISHED IN 1986-87
• GROUNDWATER SYSTEM IS NOT BEING
RECHARGED BY CANYON RUNOFF
RANCHO PALOS VERDES, CALIFORNIA
PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
EwATERING WELL 4k ,
, _
• GROUNDWATER IS PUMPED OUT OF THE SLIDE
AND PIPED TO THE OCEAN
• EFFECT ON RATE OF MOVEMENT ON UPLAND
THIRD OF SLIDE IS DRAMATIC - MASS IS
STOPPED AFTER 30 YEARS OF MOVEMENT
• 18 WELLS IN OPERATION
• " ATE OF REMOVAL OF GROUNDWATER IS
SLOW
RANCHO PALOS VERDES, CALIFORNIA
PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
•
HAS BEEN ACCOMPLISHEDWITH : .
......
WATERING WELLS •
3 �
URFACE DRAINAGE
•
Y S'.
A DSLIDE MASS REDISTRIBUTION� �o
• SHORE R TECTIOI - 'TEMPORARY
RANCHO PALOS VERDES, CALIFORNIA
PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
Illi PA:.,.,.::.. R
��t� ISC)N OF THE RESTORATiON
F� THE R INTERTIDAL HABITA '..
fR
1.;
• CLEANUP OF THE EXXON VALDEZ DISASTER
EXCEEDS $2 BILLION
• RESTORATION OF THE PORTUGUESE BEND
ROCKY INTERTIDAL HABITAT IS ESTIMATED AT
$20 MILLION
• *Source of the cost for the Exxon Valdez oil
spill is: "Out of the Channel" by Keeble
RANCHO PALOS VERDES, CALIFORNIA
PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
ENVIRONMENTAL LUS ` `
'OVER 800 SPECIES OF ORIGINAL SAND
' AND ROCKY INTERTIDAL AND SUBTID A '":
HABITAT DISPLACED BY 50 SPECIES s ' ,
MUD INHABITANTS
• HABITAT REPLACEMENT EXCEEDS $157 MILLI �' '
BASED UPON MITIGATION VALUE
• ORGANISM REPLACEMENT EXCEEDS $4 BILL!
BASED UPON PUBLISHED REPLACEMENT COS
STUDY
RANCHO PALOS VERDES CALIFORNIA
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PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
SHORE
•
PRC�TE�TIC3N P' ERMANE
N
GABIONS PROVIDED PROOF THAT:
• A WILDLIFE HABITAT FOR SENSITIVE SPECIES
COULD BE PERMANENTLY DEVELOPED ON LAND
IN THE COASTAL ZONE
Se
• 1 ,892 ACRES OF PRIME COASTAL WATERS
WOULD BE RESTORED NATURALLY
• THE PREMIER KELP-ROCK REEF HABITAT
WOULD RE-ESTABLISH NATURALLY `1hs
• THE PRISTINE SUBTIDAL AND INTERTIDAL
ENVIRONMENT COULD BE ENJOYED ONCE AGAIN
RANCHO PALOS VERDES, CALIFORNIA
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PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
•
UBTIDAL
L
vp,
n E k3i414ia#,a_.a.&a.'
• OVER 60% OF THE ROCKY AND SANDY INTERTIDA '
HABITAT DESTROYED
• OVER 10 MILLION TONS OF MUD AND SLiDE
FILL TIDEPOOLS AND COVER THE AREA
h^i
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'4-1' O RECREATIONAL DIVING
AND FISHING ADJACEN
TO PORTUGUESE BEND/ABALONE COVE
LANDSLIDES•
•
• NO COMMERCIAL FISHING
RANCHO PALOS VERDES, CALIFORNIA
ANDSLIDE ABATEMENT STATU
PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
•
CENTER OF LANDSLIDE " _
•
• RATE OF MOVEMENT (See FIGURE II)
•86 - 45.6 FEET PER YEAR
88 - 1 . 1 FEET PER YEA `
. • - 2.92 FEET PER YE
RANCHO gas VEAOEs. CALIFORNIA
RATE OF MOVEMENT
FEET PER YEAR
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11-Sep-84 / - ,. ..... -. _ .
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PORTUGUESE BEND I ABALONE COVE
ENVIRONMENTAL RESTORATION
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PORTUGUESE BEND / ABALONE COVE
ENVIRONMENTAL RESTORATION
•
ESTOR�►T! C)N INCLUDES :
ROCKY AND SANDY INTERTIDAL AND SUBTIDAL
HABITAT
• KELP—ROCK REEF HABITAT
4 Ott
• LOCAL COASTAL FISH AND WILDLIFE HABITAT
' PERMANENT COASTAL SAGE SCRUB HABITAT
x9, ' _ $ a2y a i LS .
RANCHO PALOS VERDES. CALIFORNIA
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