MEC Time Critical Removal Action MEC Time Critical Removal Action Public Beach Public Beach Boroughs of Surf City and Ship Bottom, Boroughs of Surf City and Ship Bottom, New Jersey New Jersey George C. Follett, PMP U.S. Army Corps of Engineers – Baltimore District Keith D. Watson U.S. Army Corps of Engineers – Philadelphia District John P. Gerhard Weston Solutions, Inc. – Project Manager Middle Atlantic SAME Training Conference 2007 Hampton, Virginia – 11 October 2007 an employee - owned company 07M-0144
Introduction Introduction ♦ Historical background and current site use ♦ Coastal Storm Damage Reduction Project ♦ Time Critical Removal Action (Phase 1) ♦ Summertime Monitoring (Phase 2) ♦ EE/CA Alternatives (Phase 3) Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 2
Site Location Site Location Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 3
Background Background ♦ Long Beach Island – 18 miles long ♦ Residential homes/public beaches ♦ Coastal storms/erosion ♦ Initiate Coastal Storm Damage Reduction Project – 1 st 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 Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 4 4
Beach Replenishment Beach Replenishment Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 5
Beach/Dune System Beach/Dune System 5 th Street 4 th Street Top Top Slope e Slope e n n u u D D Beach / Dune Fence 3 rd Street Dune Dune Beach Berm Surf Zone Surf Zone Beach / Dune Fence Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 6
TCRA Situation TCRA 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 Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 7
The Media The Media Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 8
TCRA Work Elements TCRA Work Elements ♦ Mobilization ♦ Geophysical Prove-Out (GPO) – Digital Instrumentation – Analog Instrumentation ♦ Explosive Safety Submission (ESS) ♦ Digital Geophysical Mapping Activities: – Dune Tops (South 3 rd Street to North 19 th Street) – Beach Berm • Phase I: Toe of dune to low tide (South 6 th Street to North 25 th Street) – Beach Scarp Zone • Phase II: Re-survey from scarp line to low tide (South 8 th Street to North 25 th Street) Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 9 9
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 Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 10 10
Digital Geophysical Mapping (DGM) Digital Geophysical Mapping (DGM) 4-Coil EM61-MK2 Towed-Array 4-Coil EM61-MK2 Towed-Array RTK GPS Base Station RTK GPS Base Station Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 11
DGM (Continued) DGM (Continued) Beach Berm – Low Tide Beach Berm – Low Tide ♦ Geonics EM61-MK2 ♦ 4 coils oriented with long- axis in direction of travel Dune Top ♦ Sled mounted Dune Top Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 12
MAG and DIG (M&D) Surf Zone MAG and DIG (M&D) Surf Zone Sand Bar Sand Bar Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 13
MAG and DIG (M&D) MAG and DIG (M&D) Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 14
Types of Military Munitions Involved Types of Military Munitions Involved 37-mm Projectile 37-mm Projectile Base Fuze Model 1906 Base Fuze Model 1906 MKI Fuze MKI Fuze MKIII Booster MKIII Booster MKII PD Fuze w/ Booster MKII PD Fuze w/ Booster Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 15
Dynamic Beach Environment Dynamic Beach Environment Heavy Surf - April 15th Nor’easter Heavy Surf - April 15th Nor’easter Beach Scarp – Erosional Feature Beach Scarp – Erosional Feature Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 16
Dynamic Beach Environment Dynamic Beach Environment ♦ Surf Zone GPO ♦ 4 of 6 items recovered ♦ Surveyed locations ♦ Displaced 30 ft. to 180 ft. ♦ Digital record of movement Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 17
TCRA Results TCRA 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 Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 18
Summertime Monitoring (Phase 2) Summertime Monitoring (Phase 2) ♦ CENAB OE-SS on-site and on-call 24/7 ♦ CENAB OE-SS on-site and on-call 24/7 ♦ MEC Recognition and Safety Training (3Rs) for ♦ MEC Recognition and Safety Training (3Rs) for municipal employees (police, fire, township and municipal employees (police, fire, township and lifeguards) lifeguards) ♦ Early morning and evening visual scans ♦ Early morning and evening visual scans of the beach of the beach ♦ Visual scan of surf zone at low tide ♦ Visual scan of surf zone at low tide ♦ 13 ordnance items recovered as of 18 September ♦ 13 ordnance items recovered as of 18 September 2007 2007 Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 19 19
Summertime Monitoring (Phase 2) Summertime Monitoring (Phase 2) Land Use Controls: ♦ Brochure ♦ Signage ♦ Public Safety Announcements in Local Newspapers – The 3Rs • Recognize • Retreat • Report Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 20
EE/CA Alternatives (Phase 3) EE/CA Alternatives (Phase 3) EE/CA and Hazard Analysis Evaluation Underway Preliminary EE/CA Alternatives: ♦ 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 Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 21
MEC Removal Costs MEC Removal Costs ♦ TCRA - $3 million (approx.) ♦ TCRA - $3 million (approx.) ♦ Sift berm and surf zone - $15 million? ♦ Sift berm and surf zone - $15 million? ♦ Sift 800K cu yds of placed sand - $25 million? ♦ Sift 800K cu yds of placed sand - $25 million? Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 22 22
Prevention Prevention ♦ Screen material to one-inch diameter – Screen placement on the dredge intake at the ocean bottom (borrow area) – Screen placement at the outfall point – Combination of screens at intake and outfall Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 23
Prevention Prevention ♦ Screen basket for the outfall Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 24
Costs of Prevention Costs of Prevention ♦ Added costs may be as high as 10% of dredging project ♦ $6M x 10% = $600K Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 25 25
Army’s “3Rs” Explosives Army’s “3Rs” Explosives Safety Education Program Safety Education Program ♦ Web-based (DENIX) (https://www.denix.osd.mil/uxosafety) ♦ T he 3Rs —a standard (consistent) message – Recognize – Retreat – Report ♦ A “Toolbox`” Approach – Videos – Presentations – Guides – Posters Sergeant Woof Surf City MEC Time Critical Removal Action Surf City MEC Time Critical Removal Action 26
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