MEC Time Critical Removal Action Public Beach

Boroughs of Surf City and Ship Bottom, New Jersey

MEC Time Critical Removal Action Public Beach

Boroughs of Surf City and Ship Bottom, New Jersey

George C. Follett, PMPU.S. Army Corps of Engineers – Baltimore District

Keith D. WatsonU.S. Army Corps of Engineers – Philadelphia District

John P. GerhardWeston Solutions, Inc. – Project Manager

an employee - owned company

Middle Atlantic SAME Training Conference 2007 Hampton, Virginia – 11 October 2007

07M-0144

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IntroductionIntroduction

♦Historical background and current site use

♦Coastal Storm DamageReduction Project

♦Time Critical Removal Action (Phase 1)

♦Summertime Monitoring (Phase 2)

♦EE/CA Alternatives (Phase 3)

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Site LocationSite Location

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BackgroundBackground

♦Long Beach Island – 18 miles long

♦Residential homes/public beaches

♦Coastal storms/erosion

♦ Initiate Coastal Storm Damage Reduction Project– 1st phase 1.6 miles: Surf City to Ship Bottom, NJ– USACE, NJDEP and Boroughs Project Partners

♦800,000 cu yds of sand

♦Sand borrow area 2.5 miles offshore

♦Beach berm 8 ft. thick, dunes 22 ft. high

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Beach ReplenishmentBeach Replenishment

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Beach/Dune SystemBeach/Dune System

Surf ZoneSurf Zone

Beach Berm

Beach / Dune FenceDuneDuneDuneDune

SlopeSlopeTopTop

5th Street

3rd Street

4th Street

Beach / Dune Fence

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TCRA SituationTCRA Situation♦Military munitions found

– Locals with metal detectors– Fence installation at dune

crossovers

♦Beach closure

♦Public safety

♦Work scope (dynamic)– Characterize with DGM /

sift operations (initial)– Rapid mobilization– Contract mechanisms

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The MediaThe Media

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TCRA Work ElementsTCRA Work Elements

♦Mobilization

♦Geophysical Prove-Out (GPO)– Digital Instrumentation– Analog Instrumentation

♦Explosive Safety Submission (ESS)

♦Digital Geophysical Mapping Activities:– Dune Tops (South 3rd Street to North 19th Street)– Beach Berm

• Phase I: Toe of dune to low tide (South 6th Street to North 25th Street)

– Beach Scarp Zone• Phase II: Re-survey from scarp line to low tide

(South 8th Street to North 25th Street)

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TCRA Work Elements (Continued)TCRA Work Elements (Continued)

♦ Mag and Dig Activities:– Surf Zone

• Phase I: low tide to 100 ft. out and/or 3 ft. deep– South 8th street to North 25th Street

• Phase II: low tide to 150 ft. out and/or 4 ft. deep– South 12th Street to North 25th Street– Sand bars

– Dune Slope• South 3rd Street to North 22nd Street

– Dune Crossovers• Pedestrian• Vehicular• Handicap

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Digital Geophysical Mapping (DGM)Digital Geophysical Mapping (DGM)4-Coil EM61-MK2 Towed-Array4-Coil EM61-MK2 Towed-Array

RTK GPS Base StationRTK GPS Base Station

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DGM (Continued)DGM (Continued)

Beach Berm – Low TideBeach Berm – Low Tide

♦Geonics EM61-MK2

♦4 coils oriented with long-axis in direction of travel

♦Sled mountedDune TopDune Top

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MAG and DIG (M&D) Surf ZoneMAG and DIG (M&D) Surf Zone

Sand BarSand Bar

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MAG and DIG (M&D)MAG and DIG (M&D)

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Types of Military Munitions InvolvedTypes of Military Munitions Involved

Base Fuze Model 1906Base Fuze Model 1906

MKI FuzeMKI Fuze

MKII PD Fuze w/ BoosterMKII PD Fuze w/ Booster

37-mm Projectile37-mm Projectile

MKIII BoosterMKIII Booster

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Dynamic Beach EnvironmentDynamic Beach EnvironmentHeavy Surf - April 15th Nor’easterHeavy Surf - April 15th Nor’easter

Beach Scarp – Erosional FeatureBeach Scarp – Erosional Feature

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Dynamic Beach EnvironmentDynamic Beach Environment

♦ Surf Zone GPO

♦ 4 of 6 items recovered

♦ Surveyed locations

♦ Displaced 30 ft. to 180 ft.

♦ Digital record of movement

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TCRA ResultsTCRA Results

♦1,079 MEC items♦Discarded Military Munitions

(DMM)♦4,025 DGM targets

– 857 MEC items

♦M&D Activities– 222 MEC items

♦Disposal: All DMM turned over to U.S. Army EOD at Ft. Monmouth, New Jersey

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♦ CENAB OE-SS on-site and on-call 24/7

♦ MEC Recognition and Safety Training (3Rs) for municipal employees (police, fire, township and lifeguards)

♦ Early morning and evening visual scans of the beach

♦ Visual scan of surf zone at low tide

♦ 13 ordnance items recovered as of 18 September 2007

♦ CENAB OE-SS on-site and on-call 24/7

♦ MEC Recognition and Safety Training (3Rs) for municipal employees (police, fire, township and lifeguards)

♦ Early morning and evening visual scans of the beach

♦ Visual scan of surf zone at low tide

♦ 13 ordnance items recovered as of 18 September 2007

Summertime Monitoring (Phase 2)Summertime Monitoring (Phase 2)

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Summertime Monitoring (Phase 2)Summertime Monitoring (Phase 2)

Land Use Controls:

♦ Brochure

♦ Signage

♦ Public Safety Announcements in Local Newspapers

– The 3Rs

• Recognize

• Retreat

• Report

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EE/CA Alternatives (Phase 3)EE/CA Alternatives (Phase 3)

♦ No further action♦ Close beach♦ Continue Land Use Controls (LUCs)♦ Repeat Phase I surface/subsurface removal

to detection depth– Continue LUCs annually for 5 years

♦ Sieve berm and surf zone to the depth of sand placement*– Clear dune surface/subsurface to detection depth– Continue LUCs on the dune

♦ Sieve entire beach – berm, surf and dune to the depth of sand placement– Discontinue LUCs except for informational signs for 5 years

♦ Alternative* with a subsequent storm event that erodes the dune– May require resifting entire beach

EE/CA and Hazard Analysis Evaluation UnderwayPreliminary EE/CA Alternatives:

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MEC Removal CostsMEC Removal Costs

♦TCRA - $3 million (approx.)

♦Sift berm and surf zone - $15 million?

♦Sift 800K cu yds of placed sand - $25 million?

♦TCRA - $3 million (approx.)

♦Sift berm and surf zone - $15 million?

♦Sift 800K cu yds of placed sand - $25 million?

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PreventionPrevention

♦Screen material to one-inch diameter

– Screen placement on thedredge intake atthe ocean bottom(borrow area)

– Screen placement at the outfall point

– Combination of screens at intake and outfall

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PreventionPrevention

♦Screen basket for the outfall

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Costs of PreventionCosts of Prevention

♦Added costs may be as high as 10% of dredging project

♦$6M x 10% = $600K

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Army’s “3Rs” Explosives Safety Education ProgramArmy’s “3Rs” Explosives Safety Education Program

♦ Web-based (DENIX) (https://www.denix.osd.mil/uxosafety)

♦ The 3Rs—a standard (consistent) message– Recognize– Retreat– Report

♦ A “Toolbox`” Approach– Videos– Presentations– Guides – Posters Sergeant Woof

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Questions?Questions?

an employee - owned company

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