  INVESTOR PRESENTATION GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS 2013 | Q4 INFO@GLDD.COM | GLDD.COM Exhibit 99.1 |
   SAFE HARBOR GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM This presentation includes “forward-looking” statements within the meaning of Section 27A of the Securities Act of 1933, Section 21E of the Securities Exchange Act of 1934, the Private Securities Litigation Reform Act of 1995 or in releases made by the SEC, all as may be amended from time to time. Such statements include declarations regarding the intent, belief, or current expectation of the Company and its management. The Company cautions that any such forward-looking statements are not guarantees of future performance, and involve a number of risks, assumptions and uncertainties that could cause actual results of the Company and its subsidiaries, or industry results, to differ materially from those expressed or implied by any forward-looking statements contained herein, including, but not limited to, as a result of the factors, risks and uncertainties described in other securities filings of the Company made with the SEC, such as the Company’s most recent Report on Form 10-K. You should not place undue reliance upon these forward-looking statements. Forward-looking statements provided herein are made only as of the date hereof or as a specified date herein and the Company does not have or undertake any obligation to update or revise them, unless required by law. 2 |
    PRESENTERS GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM Chief Executive Officer, Director > JONATHAN BERGER Treasurer, Director of Investor Relations > WILLIAM STECKEL Senior Vice President, Chief Financial Officer > KATIE HAYES > Board member since December 2006 > Former Managing Director and Co-head of Corporate Finance for Navigant Consulting, Inc. > Former partner at KPMG, LLP and past National Partner in charge of Corporate Finance at KPMG > Previously served as CEO, president, CFO and treasurer at Daystar Technologies, Inc. > Served as senior vice president, CFO and treasurer at Norwood Promotional Products > Held management positions with Invensys in its Lambda Power, Seibe Climate Controls and CTS Corporation Divisions > Named Treasurer in March 2011 > Served as Director of Investor Relations since the Company went public in 2006 > Joined the Company in 2006 and has over 20 years of accounting and finance experience > Previously worked at TransUnion as Director of Corporate Accounting. 3 |
 01 ABOUT US GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM 4 |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM > WHO IS GREAT LAKES DREDGE & DOCK CORPORATION? > Domestic Dredging > International Dredging > Environmental Services > Demolition ABOUT US 01 Infrastructure & Environmental 5 |
 ABOUT US 01 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM > DREDGING & THE ECONOMY “The health of the U.S. economy depends, in part, upon the vitality and expansion of international trade. International trade depends upon the Nation’s navigation infrastructure, which serves as a conduit for transportation, trade, and tourism and connects us to the global community. Marine transportation is one of the most efficient, effective, safe and environmentally sound ways to transport people and goods. It is a keystone of the U.S. economy. Ninety-five percent of our international trade moves through the Nation’s ports.” >> Honorable Jo-Ellen Darcy, Assistant Secretary of the Army (Civil Works) << 6 |
 > DREDGING WORLDWIDE WHERE WE HAVE WORKED COUNTRIES WHERE WE SEE OPPORTUNITIES GLOBAL REACH 7 |
 02 FUTURE GROWTH GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM 8 |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM FUTURE GROWTH 02 GROW PURSUE EXPAND CAPITALIZE ENHANCE BUILD Build upon Great Lakes’ preeminent position in the U.S. dredging market Enhance the Company’s operating capabilities via prudent and cost-effective investments and asset management Capitalize on adjacent market opportunities in the Company’s domestic markets Expand the Company’s presence in foreign markets Pursue growth opportunities in the environmental remediation market Looking at acquisitions that fit in well with our strategy > WHERE ARE WE GOING Great Lakes intends to grow the business by continuing to execute the following strategies: Announced construction of Hopper Dredge - strategic investment by the Company in providing the most productive, efficient and capable dredging equipment in the domestic industry The 12/31/12 Terra Contracting acquisition fits the Company’s strategic vision to gain a stronger foothold in the environmental remediation market. |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM FUTURE GROWTH 02 > ACQUISITION OF TERRA CONTRACTING, LLC > On December 31, 2012, Great Lakes acquired the assets of Terra Contracting, LLC (Terra). > Terra is a respected provider of a wide variety of essential services for environmental, maintenance and infrastructure-related applications. > Headquartered in Kalamazoo, MI, Terra employs approximately 200 engineering, operations and administrative staff and serves customers in more than thirty states in the environmental, infrastructure, energy, industrial, transportation, waste water and construction sectors. > Terra will broaden our demolition segment with additional services and expertise as well as expand our footprint in the Midwest. Terra reinforces our efforts to develop relationships with larger industrial and governmental clients. Additionally, our rivers & lakes operations can leverage Terra's environmental remediation focus to accelerate its participation in the environmental dredging market. > The purchase price was approximately $26 million. > The Company has announced that it is assessing strategic alternatives with respect to its historical demolition business – which would not include Terra Contracting. 10 |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM FUTURE GROWTH 02 > INFRASTRUCTURE & ENVIRONMENTAL INLAND DREDGING PORT DEEPENING PORT MAINTENANCE COASTAL RESTORATION COASTAL PROTECTION LAND RECLAMATION DEMOLITION CONTRACTORS* SITE DEVELOPMENT BRIDGE DEMOLITION* HAZARDOUS MATERIAL REMOVAL SERVICES SEDIMENT & SOIL REMEDIATION LEVEE CONSTRUCTION ENVIRONMENTAL & REMEDIATION SERVICES 11 * The Company has announced that it is assessing strategic alternatives with respect to its historical demolition business. |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM FUTURE GROWTH 02 > INFRASTRUCTURE & ENVIRONMENTAL INLAND DREDGING PORT DEEPENING PORT MAINTENANCE COASTAL RESTORATION COASTAL PROTECTION LAND RECLAMATION DEMOLITION CONTRACTORS* SITE DEVELOPMENT BRIDGE DEMOLITION* HAZARDOUS MATERIAL REMOVAL SERVICES SEDIMENT & SOIL REMEDIATION LEVEE CONSTRUCTION ENVIRONMENTAL & REMEDIATION SERVICES 12 * The Company has announced that it is assessing strategic alternatives with respect to its historical demolition business. |
  GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM FUTURE GROWTH 02 > U.S. port deepening, post Panama Canal deepening > Gulf Coast Restoration > Other sources of dredging demand include port development and levee repair/replacement > RESTORE Act requires 80% of penalties to be deposited into a coastal protection works fund which includes dredging > Calls for appropriations of HMTF monies so that total budget resources on harbor maintenance will be equal to the level of receipts > Senate and House passed their versions of WRDA with favorable HMTF reform language. Could be reconciled and passed before year-end > Provides a very high level of attention and funding for coastal protection work > Provides a surge in work load for the balance of the year and perhaps into next year. It is anticipated that the attention will result in increased sustainable funding in future years. > Provides $800 million for maintenance dredging in addition to Corps’ annual budget ATTRACTIVE NEAR & LONG-TERM CATALYSTS IN U.S. DREDGING MARKET MAP-21 TRANSPORTATION BILL SANDY SUPPLEMENTAL APPROPRIATIONS BILL 13 |
 DELAWARE 40’ NEW YORK 50’ BOSTON 40’ CHARLESTON 45’ SAVANNAH 42’ JACKSONVILLE 40’ PORT EVERGLADES 42’ MIAMI 42’ MOBILE 45’ NEW ORLEANS 45’ HOUSTON 45’ SAN DIEGO 35’ PORTS WITH DEEPENING EXPEDITED BY OBAMA ADMINISTRATION PORTS WITH PLANS FOR EXPANSION > PORTS WITH PLANS FOR EXPANSION International trade, particularly in the intermodal container shipping business, is undergoing significant change as a result of the Panama Canal expansion. Many shipping lines have announced plans to deploy larger ships which, due to channel dimension requirements, currently cannot use many U.S. East and Gulf Coast ports. PORTS 14 |
  03 DREDGING OVERVIEW GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM 15 |
   GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM DREDGING OVERVIEW 03 CAPITAL COASTAL PROTECTION MAINTENANCE INTERNATIONAL RIVERS & LAKES Deepening ports, land reclamation, and excavation of underwater trenches Bid Market Share* 29% Creating and rebuilding beaches Bid Market Share* 60% Maintaining depth of shipping channels Bid Market Share* 31% International land reclamations, channel deepening and port infrastructure development 3-year Average Revenue $91M Inland maintenance and lake dredging, Environmental and habitat restoration Bid Market Share* 43% *The Company’s bid market is defined as the aggregate dollar value of domestic projects on which the Company bid or could have bid if not for capacity constraints. Bid market share represents bid market average over the prior three years. 16 |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM DREDGING OVERVIEW 03 > LARGEST PROVIDER OF DREDGING YTD Q3 2013 REVENUE BY WORK TYPE $541 MILLION 2012 REVENUE BY WORK TYPE $688 MILLION 2012 DOMESTIC DREDGING BID MARKET SHARE DOM. BID MARKET: $939 MILLION YTD Q3 2013 DOMESTIC DREDGING BID MARKET SHARE DOM. BID MARKET: $1,059 MILLION GREAT LAKES DON JON NORFOLK DUTRA ORION WEEKS MANSON OTHER CAPITAL DEMOLITION MAINTENANCE RIVERS & LAKES COASTAL PROTECTION FOREIGN 17 |
  GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM > 20 Vessels*: 16 U.S., 4 Middle East (19 U.S. flagged) > Including the only two large electric cutterhead dredges available in the U.S. for environmentally sensitive regions requiring lower emissions > 7 Vessels: 4 U.S., 3 Middle East, (4 U.S. flagged) > Highly mobile, able to operate in rough waters > Little interference with other ship traffic > 5 Vessels: 3 U.S., 2 International, (All U.S. flagged) > Operates one of two environmentally friendly electric clamshell dredges in the U.S. > Maneuverability in tight areas such as docks and terminals HYDRAULIC HOPPER MECHANICAL DREDGING OVERVIEW 03 *Note: Nine vessels were added from 2010 rivers & lakes acquisition which are hydraulic but have less capacity, ideal for rivers and environmental dredging. + 19 Material Transportation Barges and Over 160 Other Specialized Support Vessels > LARGE & FLEXIBLE FLEET, U.S. & INTERNATIONAL MARKETS 18 |
  GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM DREDGING OVERVIEW 03 The dredge represents a strategic investment by the Company in providing the most productive, efficient and capable dredging equipment in the domestic industry. > ARTICULATED TUG HOPPER DREDGE > Build the low cost producer for U.S. Hopper Market > Improve operating margins > GLDD capacity grows and new technology positions us as the low cost hopper dredging competitor, expanding market leadership role > Meet future market needs with HMTF & Gulf Coastal Restoration > Positions us for competitive advantage in new market opportunities GREAT LAKES’ HOPPER DREDGE OBJECTIVES: > Currently in design phase with expected completion in 2016 > GLDD is in discussions with other shipyards to proceed with construction of the vessel NEW HOPPER DREDGE GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM 19 |
   GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM DREDGING OVERVIEW 03 > TWO NEW MATERIAL SCOWS > The scows will be used primarily on capital deepening and coastal restoration work on the East and Gulf coasts. > GLDD has become very successful loading scows with cutter suction dredges. This has allowed us to match the dredging ability of the cutter suction dredges on projects, giving us an effective transportation system and a cost advantage over our competitors. > Construction of the dredge and scows created approximately 250 new U.S. shipyard and engineering jobs over the construction period. GREAT LAKES’ NEW MATERIAL SCOWS > Estimated cost: $17 million ($8.5 million each) NEW SCOWS GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM 20 |
  04 INVESTMENT HIGHLIGHTS GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM 21 |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM INVESTMENT HIGHLIGHTS 04 *Foreign backlog at December 31, 2008 has been adjusted for the portion of the Diyar contract that became an option pending award in the first quarter of 2009 **Includes domestic dredging low bids and options pending award of $95 million > BACKLOG BY WORK TYPE | $ IN MILLIONS 22 |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM INVESTMENT HIGHLIGHTS > ANNUAL REVENUE > ANNUAL ADJUSTED EBITDA* *Adjusted EBITDA represents net income (loss), adjusted for net interest expense, income taxes, depreciation and amortization expense, accelerated maintenance expense, goodwill impairment and debt restructuring expense. Please see reconciliation of Net Income (Loss) to EBITDA at the end of this presentation. Note: Great Lakes went public in December 2006 CAPITAL DEMOLITION MAINTENANCE RIVERS & LAKES INTERSEGMENT COASTAL PROTECTION FOREIGN DREDGING DEMOLITION EBITDA MARGIN 04 23 |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM INVESTMENT HIGHLIGHTS 04 > CAPEX $ IN MILLIONS > LEVERAGE (A) Includes $14.6 related to the upgrade of the dredge Ohio and $36 related to Matteson acquisition. (B) Includes$13.7 related to the Empire Pipeline, $3.6 related to the ATB Hopper Dredge, $6.8 related to two new scows and $11.7 related to the Terra Contracting acquisition. (C) Includes $14.7 related to the ATB Hopper Dredge and $7.6 related to two new scows. 24 |
  GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM > “Dredging Act” and “Jones Act” effectively serve as barriers to entry for non-U.S.-owned dredging companies > Demonstrated record of successful project completion having never failed to complete a marine project > U.S. dredging operator with significant international presence > Portfolio of flexible fleet enables repositioning of vessels as necessary > Added sediment & soil remediation capabilities with Terra acquisition > Continuing bridge demolition business PROTECTED MARKET & PROVEN RECORD INTERNATIONAL PRESENCE REMEDIATION & DEMOLITION CAPABILITIES INVESTMENT HIGHLIGHTS 04 25 |
  05 REMEDIATION & DEMOLITION SERVICES GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM 26 |
  GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM DEMOLITION & SITE REMEDIATION SERVICES 05 > DEMOLITION AND SITE REMEDIATION SERVICES GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM > Major U.S. provider of commercial and industrial demolition services, including bridge demolition; preferred in New England > Rated in the Top 10 Demolition Companies According to 2011 Engineering News-Record (ENR) > Purchased Yankee in 2009; able to offer removal of asbestos and hazardous materials > Bidding work nationally > The Company has announced that it is assessing strategic alternatives with respect to its historical demolition business. NASDI & YANKEE ENVIRONMENTAL SERVICES (IN MILLIONS) THREE YEAR AVERAGE (FY2010-2012) FY 2011 FY 2012 DEMOLITION REVENUE $95 $107 $101 27 |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM • GLDD’s primary focus is in the following services: • Remediation and Environmental Clean-up • Demolition & Wrecking • Site Preparation and Development • Brownfield Cleanup and Redevelopment • Bridge Renovation / Demolition • Special / Hazardous Waste Disposal Services • Industrial and Municipal Services • Remediation and Environmental Clean-up Services account for over 70% of the total market – and is Terra Contracting Services’ and NASDI’s target market Market for environmental remediation/ site development services is over $34 billion Source: Ibisworld and internal GLDD estimates Forecasted Annual Growth (2013-2018) Land Development 5.6% Demolition & Wrecking 5.9% Special / Hazardous Waste Disposal 3.1% Heavy Infrastructure Construction 3.0% Remediation & Environmental Services 1.4% Average Annual Growth Rate 4.0% INFRASTRUCTURE SERVICES 05 28 * The Company has announced that it is assessing strategic alternatives with respect to its historical demolition business – which would not include Terra Contracting. |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM Positive growth is expected over the next five years, primarily driven by the private sector Aging U.S. Infrastructure Expansion of Energy Infrastructure Government Regulations Increased Environmental Focus • Decades of minimal capital expenditure in the industrial, oil & gas, utility, and public sectors • Average U.S. oil refinery was sited and constructed over fifty years ago • Average age of the U.S. coal fleet is 43 years, with more than half the plants built before 1967 • American Society of Civil Engineers estimates investment needed by 2020 in U.S. infrastructure is $3.6 Trillion • Discovery of shale gas and fracking technology have resulted in increased infrastructure spend and expected to lead to need for site cleanups and waste disposal, as well as site remediation and redevelopment • Expansion and improvement of midstream assets and refining capacity is expected: natural gas, natural gas liquids (NGL), and oil transmission infrastructure spend is estimated to be more than $250 billion over the next 25 years • New / specialized waste streams and treatment driving need for increased environmental regulation • Both federal and state governments have increased oversight of environmental practices, tightened mandates, and increased legislation • EPA mandates to lower greenhouse gas emissions and improve efficiency of big power plants are expected to increase • Sustainability is increasingly viewed as a source of revenue and business growth • Consumers demanding greener technologies, products and services • Random and unfortunate events (e.g. BP oil spill) require environmental remediation and clean-up, Hurricane Sandy clean-up is continuing • Superfund sites in the Northeast due to reduced land inventory are now obtaining funding for environmental clean-up and remediation to develop brownfields 05 DEMAND DRIVERS 29 |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM The market is highly fragmented with approximately 5,000 small, local and regional service providers and a few large public players • No Dominant Industry Players – large firms offer a range of services across the remediation industry, and may be contracted to complete all the different requirements of a major cleanup. Smaller firms have competitive edge based on specialized equipment or technology • High Competition – Competition is growing based on willingness of firms to agree to fixed price contracts. Contractors are assuming greater risks in relation to performance and liability for damage and injury – larger operators are likely better positioned here • High Barriers to Entry – Based on increasing share of financial risks associated with the completion of remediation projects. Fixed price contracts and assuming other liabilities also create high barriers to entry • Growth and expansion opportunities are to merge or acquire others to exploit economies of scale, or specialize in niche, high-value services COMPETITIVE LANDSCAPE 05 30 * The Company has announced that it is assessing strategic alternatives with respect to its historical demolition business – which would not include Terra Contracting. |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM – Public sector consists of both federal (e.g., EPA, DOE, DOD) and state and local governmental entities – Private sector end markets include Construction and Manufacturing, Utilities, Oil & Gas, Mining and Waste Holding Facilities Customers include public and private end users as well as environmental consulting engineering and construction (EE&C) firms CUSTOMERS 05 31 • Customer base is equally split between public and private sector • As federal stimulus funding declines, private sector players are expected to exhibit higher demand for remediation services • Services are procured either directly or via an EE&C firm, which subcontracts parts of jobs to service providers |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM • In some instances, EE&C firms and developers manage projects on behalf of an end-user – The EE&C firm / developer sub-contracts out specific pieces of a project to various service providers, many of which may offer a specific capability • However, companies with a robust suite of service offerings and sufficient scale are able to more often be the primary contractor on a job, thereby collapsing a step in the services value chain With broad service capabilities and greater scale, we are better positioned to capture more value by targeting end users directly Service Provider (e.g., Terra / NASDI) Developers and EE&C Firms (e.g., Arcadis) End-Users (e.g., Industrial, Utilities or Governmental Entities) ROUTES TO MARKET BENEFITS OF SELLING DIRECT • Improved economics • Greater control over execution and customer relationships VALUE CHAIN 05 32 |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM Our core competencies will ensure successful execution of projects in the environmental services market GLDD CORE COMPETENCIES 05 33 |
  06 APPENDIX GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM 34 |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM APPENDIX 06 FISCAL YEAR ENDING DECEMBER 31, NINE MONTHS ENDED JUNE 30, ($ IN MILLIONS) 2008 2009 2010 2011 2012 2012 2013 NET INCOME (LOSS) ATTRIBUTABLE TO GREAT LAKES DREDGE & DOCK CORPORATION $5.0 $17.5 $34.6 $16.5 $(2.7) $(3.0) $(23.4) ACCELERATED MAINTENANCE EXPENSES 4.7 2.2 LOSS ON EXTINGUISHMENT OF DEBT 5.1 IMPAIRMENT OF GOODWILL 21.5 INTEREST EXPENSE - NET 17.0 16.1 13.5 21.7 20.9 15.7 16.7 INCOME TAX PROVISION (BENEFIT) 3.8 11.0 20.6 9.5 (2.0) (2.0) (1.7) DEPRECIATION AND AMORTIZATION 30.1 33.0 34.3 40.9 40.0 26.6 35.7 ADJUSTED EBITDA $55.9 $77.6 $103.0 $93.7 $60.9 $39.5 $48.8 > RECONCILIATION OF NET INCOME (LOSS) TO ADJUSTED EBITDA 35 |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM APPENDIX 06 > STOCK PERFORMANCE 12.31.06 12.31.07 12.31.08 12.31.09 12.31.10 12.31.11 12.31.12 06.30.13 GLDD 100.0% 135.2% 64.3% 100.5% 114.3% 86.2% 138.4% 121.2% PEERS 100.0% 132.6% 89.3% 96.6% 96.8% 79.3% 96.3% 117.7% RUSSELL 2K 100.0% 97.3% 63.4% 79.4% 99.5% 94.1% 107.8% 124.1% NASDAQ 100.0% 109.8% 65.3% 93.9% 109.8% 107.9% 125.0% 140.9% INITIAL INVESTMENT $100 Note: Great Lakes went public in December 2006 36 |
 GREAT LAKES DREDGE & DOCK CORPORATION > INFRASTRUCTURE SOLUTIONS INFO@GLDD.COM | GLDD.COM 37 |