Horseshoe Bay, PWS-SW05

Tim L. Robertson

This is not intended for navigational use.

Center of map at 60˚ 02.07' N Lat., 147˚ 56.20' W Lon.

SW-05-02a Wilson Bay viewed from the northwest.Lege

ndMap Photo&

Free-oil Recovery,Shallow Water

Exclusion Booming

Passive Recovery andDebris Removal,Marine Access

Protected-water Boom

Soundings in fathoms

August 2003

G

Scale

1 nm

1 mi.

1,000 yds.

G

FO-S01

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02aEX

03bPR

03aPR

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Bett les Is land

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Wil

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SW-05-02b HorseshoeBay viewed from thenorthwest.

Tidal-seal Boom

Snare Line

Gate

Eagle Nest

Prince William Sound Zone Geographic Response Strategies August 2003

PWS-SW05

ID Location and Description Response Strategy Implementation Response Resources Staging Area Site Access Resources Protected(months)

Special Considerations

PWSSW05-01

Wilson Bay/Horseshoe Bay

Nearshore waters in thegeneral area of:

Lat. 60º 02.07 NLon. 147º 56.20 W

Free-oil Recovery-ShallowWater

Maximize free-oil recovery inthe offshore & nearshoreenvironment of WilsonBay/Horseshoe Bay dependingon spill location andtrajectory.

Deploy free-oil recovery strike teamsupwind and up current of WilsonBay/Horseshoe Bay.

Use aerial surveillance to locate incomingslicks.

Deploy multiple free-oil recovery striketeams as required to maximizeinterception of oil before it impactssensitive areas.

Marine Marine

Chart 16701-1

Same as PWS-SW05-02

Vessel master should have localknowledge.

PWSSW05-02

Wilson Bay/Horseshoe Baya. Wilson Bay

Lat. 60º 02.37 NLon. 147º 54.98 W

b. Horseshoe Bay

Lat. 60º 01.42 NLon. 147º 56.41 W

Exclusion

Exclude oil from enteringWilson Bay/Horseshoe Bay.

Transport equipment by vessel (class2/3/4).

Deploy anchors and boom with fishingvessels and skiffs (class 3/4/6).

Place tidal-seal boom and protected-waterboom across the mouths of Wilson andHorseshoe Bays.

Install a gate for vessel access throughboom array in Horseshoe Bay.

Tend throughout the tide.

Boom lengths:

a. 1200 ft.

b. 1200 ft.

DeploymentEquipment

2400 ft. protected-water boom4 section ≥50 ft. tidal-seal boom9 ea. anchor systems (~40 lbs.)8 ea. anchor stakes1 ea. gate system

Vessels1 class 2 (transport)3 class 3/41 class 6

Personnel/Shift11 ea. vessel crewTending

Vessels1 ea. class 3/41 ea. class 6

Personnel/Shift3 ea. vessel crew

Chenega could beutilized as stagingarea.

Vessel platform

Marine

Helicopter Floatplane

Chart 16701-1

Southern end of theHorseshoe Bay boomis on private lands.Permission should berequested.

Fish-intertidalspawning-salmon(May—Sept.)

Birds- waterfowl use,eagle nests (May-Sept.)

Human use-subsistenceresources, highrecreational use, StateMarine Park,commercial fishing

Habitat-marsh

Vessel master should have localknowledge.

If eagle nest is occupied aminimum separation distance of660’ must be maintained.

REPORT any cultural resourcesfound during operations toFOSC Historic PropertiesSpecialist.

Deployed, surveyed, verified:June 2001, SERVS

PWSSW05-03

Wilson Bay/Horseshoe Baya. Wilson Bay

Lat. 60º 02.37 NLon. 147º 54.98 W

b. Horseshoe Bay

Lat. 60º 01.42 NLon. 147º 56.41 W

Passive Recovery

Minimize impact to the tidalflats in Wilson Bay/HorseshoeBay through the use of passiverecovery of oil.

Transport equipment by vessel (class 3/4)from Seward.

Place and anchor snare or sorbent boomacross the tidal flats in WilsonBay/Horseshoe Bay.

Replace as necessary to maximize therecovery.

Tend at least once per tide.

Boom lengths:

a. 400 ft.

b. 1200 ft.

DeploymentEquipment

1600 ft. snare or sorbent boom16 ea. anchor stakes

Vessels/Personnel/ShiftSame as PWS-SW05-02Tending

Vessels/Personnel/ShiftSame as PWS-SW05-02

Vessel platform Marine

Chart 16701-1

Same as PWS-SW05-02

Use snare boom for persistentoils and sorbent boom for non-persistent oils.

Optional tactic for protection ofthe salmon streams