MIAMI HARBOR DEEP DREDGE PROGRAM IN PARTNERSHIP WITH US ARMY CORPS - - PowerPoint PPT Presentation

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MIAMI HARBOR DEEP DREDGE PROGRAM IN PARTNERSHIP WITH US ARMY CORPS - - PowerPoint PPT Presentation

Sep 13, 2023 144 likes •320 views

MIAMI HARBOR DEEP DREDGE PROGRAM IN PARTNERSHIP WITH US ARMY CORPS OF ENGINEERS PortMiami Statistics Economic Impact: Over $18 Billion Supports 180,000 jobs directly and indirectly Cargo Gateway of the Americas Approximately

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SLIDE 1

MIAMI HARBOR DEEP DREDGE PROGRAM IN PARTNERSHIP WITH US ARMY CORPS OF ENGINEERS

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SLIDE 2

PortMiami Statistics

Economic Impact: Over $18 Billion

  • Supports 180,000 jobs directly and indirectly
  • “Cargo Gateway of the Americas”
  • Approximately 907,607 TEUs
  • Top Trading Partners: China, Hong Kong, Honduras, Dominican

Republic, & Germany

  • Top Imports: tiles, textiles, fruits, & vegetables
  • “Cruise Capital of the World”
  • More than 4 million passengers
  • Homeport for 31 cruise ships (including Azmara Club Cruises,

Carnival Cruise Line, Royal Caribbean Cruise Line, MSC, Costa Cruises, Norwegian Cruise Line, Disney Cruise Line, Celebrity Cruises, Regent Seven Seas Cruises & Oceania Cruises)

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SLIDE 3

Where We Are Today

Miami Harbor, Florida

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SLIDE 4
  • Plan formulation Iteration
  • Optimize widths

– Identify, avoid & minimize impacts to resources

  • Additional simulations, meetings

with Pilots, Resource Agencies, Community Stakeholders, etc…

Navigation Improvement Plan Selection

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SLIDE 5

Wide n se award po rtio n

  • f Cut-1 fro m 500 to 800

fe e t; de e pe n Cut-1 and Cut-2 fro m 44 to 52 fe e t Add turn wide ne r at the so uthe rn inte rse c tio n o f Cut-3 with F ishe rman’s Channe l and de e pe n to 50 fe e t I nc re ase F ishe r I sland turning basin fro m 1200 to 1500 fe e t; trunc ate NE se c tio n o f the turning basin to minimize se agrass impac ts; de e pe n fro m 42 to 50 fe e t E xpand be rthing are a by 60 fe e t and wide n so uthe rn e dge o f F ishe rman’ s Channe l 40 ft; re duc e L ummus I sland turning basin to a 1500 ft dia.; de e pe n fro m 42 to 50 ft

Component 1: Component 2: Component 3: Component 5:

DE E P DR E DGE PL AN DE E P DR E DGE PL AN

E xisting F e de ral Channe l

COMPONE NT 5 COMPONE NT 3 COMPONE NT 2 COMPONE NT 1

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SLIDE 6

Request for Proposal

– Approximately 5,000,000 CY of dredging

  • EPA designated offshore site
  • Rock material for artificial reef habitat
  • Borrow sites for seagrass mitigation

– Estimate 4,000,000 CY of Rock – Confined Blasting will be Allowed – All Environmental Permits are in Place

Project Scope

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SLIDE 7
  • Artificial Reef Creation – 9.28 acres
  • Coral Relocation
  • All hard corals >25cm
  • Up to 1300 hard corals between 10

and 25 cm

Mitigation for Unavoidable Hardbottom Impacts

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SLIDE 8

Artificial Reef Mitigation Areas

OFFSHORE ARTIFICIAL REEF MITIGATION AREAS

Reef Mitigation Sites have capacity of 40 acres

ADJACENT SUCCESSFUL ARTIFICIAL REEF MITIGATION SITE

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SLIDE 9

Julia T uttle Se agr ass Mitigation Ar e a

F ishe rman’ s Channe l

  • Se agr

ass Mitigation Site

  • L
  • c ation is pr

e vious dr e dge mate r ial bor r

  • w site for

c ause way c onstr uc tion (pr e 1925)

  • Sur

r

  • unde d by he althy se agr

asse s

  • T

ur bidity Cur tains will sur r

  • und the r

e stor ation site

  • R

e stor ation of 16.6 ac r e s of se agr ass, 7.15 ac r e s to be plante d

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SLIDE 10

Miami Harbor, Florida

Miami Beach Miami Virginia Key Cape Florida

Government Cut Port of Miami N

OFFSHORE DREDGED MATERIAL DISPOSAL SITE EXISTING ARTIFICIAL REEF SITES

Legend

EPA Designated Offshore Disposal Area

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SLIDE 11

Construction Monitoring

  • Turbidity Monitoring
  • Sedimentation Monitoring
  • Secondary Impacts
  • Hardbottom and Corals
  • Seagrass Beds

Natural Turbidity in the Bay Typical Sedimentation Station

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SLIDE 12

Confined Blasting Overview

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SLIDE 13

Confined vs Unconfined Blasts

3000 pounds of explosives CONFI NED (proposed)

7 pounds of explosives UNCONFI NED (old school)

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SLIDE 14

Monitoring Zones

Average Zone Configuration erage Zone Configuration for for Miami Harbor Miami Harbor Phase II Phase II Confined Blasti Confined Blasting ng

R R = 260 (cube r = 260 (cube root W) W) R2 = Safety R2 = Safety Radiu dius W = W W = Weight ight of e

  • f explosi

plosives

  • Dange

Danger Zone R r Zone Radiu dius = = 260 (lbs/del 260 (lbs/delay) ay)

  • Safety Z

Zone Ra Radius = = 520 (lbs/del 520 (lbs/delay) ay)

  • Wa

Watch Z Zone R Radius = 3[260 (lbs 3[260 (lbs/de /delay)] Ra Radius Configur Configurati ation n Fo Formula

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SLIDE 15
  • Summer 2012 Design and

Permitting Compete

  • Fall 2012 Advertise
  • Winter 2013 Award Contract
  • Spring 2013 Commence Work
  • Spring 2015 Complete Work

& OPEN for Deeper Draft Vessels!

Project Schedule

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SLIDE 16

Thank You

For more information www.miamidade.gov/portofmiami www.saj.usace.army.mil