What Mare Island Dry Dock does

Mare Island Dry Dock, LLC is a privately-held West Coast shipyard headquartered in Vallejo, California, on a historic 1854 Naval site that the company reacquired and reopened in November 2013. The company operates from an 18+ acre facility featuring two active concrete graving docks (Dry Dock 2 at 720 ft x 98 ft; Dry Dock 3 at 680 ft x 90.5 ft), with a third 525 ft dock listed as in development, supported by three berths totaling 1,300 linear feet and a heavy-lift crane fleet ranging from 28 to 165 tons. Core offerings include dry docking, ship repair and conversions, major overhauls, and 24/7 emergency ship services for both government and commercial vessels, anchored by a five-year, $75 million Coast Guard Polar Star Service Life Extension Program and prior work for the U.S. Navy, NOAA, and Military Sealift Command. The company generated project-based service revenue under negotiated multi-year government contracts and custom commercial quotes, targeting federal maritime agencies alongside commercial operators such as National Geographic Expeditions, Hornblower Cruises, and Crowley Maritime.

The business model is relationship-driven and project-based, with go-to-market executed through direct enterprise outreach and government contracting offices rather than traditional marketing channels. A March 2022 $13 million historic investment, announced with Congressman Garamendi, was directed toward MIL-STD-1625D dock certification to unlock Navy work and double the workforce. However, the company experienced a reported 65% sales decline over three years and the loss of an $11 million Coast Guard contract, and in January 2026 announced plans to cease shipyard operations while preserving a training partnership with Cal Maritime Academy and the U.S. Maritime Administration. Average employee compensation exceeds $100,000 annually with a high school diploma or relevant experience as the primary qualification.

Name

Mare Island Dry Dock

Legal name

Mare Island Dry Dock, LLC

Website

https://middllc.com

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

101–250 employees

Short description

Mare Island Dry Dock operates a historic 18+ acre West Coast shipyard in Vallejo, California, providing dry docking, vessel repair, and overhaul services for U.S. Navy, Coast Guard, NOAA, MSC, and commercial maritime clients. Revenue is project-based, anchored by long-term government contracts.

Ownership category

akta.pro rank

Product category

Ship Repair and Dry Docking Services

NAICS

Ship Building and Repairing (336611), Support Activities for Water Transportation (4883)

SIC

Ship & Boat Building & Repairing (3730)

akta.pro primary industry

Dry Docking & Dockyard Operations (Graving/Floating Docks, Docking Services) (TLAHAMAA)

akta.pro secondary industries

Dry Docking & Hull Steelwork Repair (IMAJAFAA), Naval Ship Modernization, Refits & Life Extension (Depot Maintenance) (IMAJABAI), Dry Docks & Floating Docks (Graving, Floating, Syncrolift) (IMAJALAA)

Keywords

• Ship repair services
• Dry docking services
• Vessel maintenance
• Marine shipyard
• Commercial ship repair

Headquarters

HQ city

Vallejo

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Infrastructure, Operations, Supply Chain

Revenue model

1. Vessel Repair and Dry Docking Services: Project-based service revenue from dry docking, ship repairs, overhauls, and emergency ship services for both government and commercial vessels. Revenue is generated through negotiated contracts and service agreements, typically long-term relationships with maritime operators and government agencies.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Mare Island Dry Dock operates concrete graving dock shipyard facilities providing dry docking, ship repair and conversions, major overhauls, and 24/7 emergency ship services for government and commercial vessels up to 720 feet in length. The facility also offers heavy-lift crane services (up to 165 tons) and secure berthing up to 1,300 linear feet at its 18+ acre Vallejo, California shipyard, the oldest West Coast shipyard originally established in 1854.

Product overview

Mare Island Dry Dock, LLC is a privately-owned West Coast shipyard offering a unified suite of maritime vessel repair and dry docking services from its historic facility in Vallejo, California. The company operates three concrete graving docks (Dry Dock 1 coming soon, Dry Dock 2 at 720 feet, and Dry Dock 3 at 680 feet) capable of accommodating fully loaded ships, along with three secure berthing options totaling up to 1,300 linear feet. Core services include dry docking, ship repair and conversions, major overhauls, emergency ship services, crane operations, and vessel berthing for repair and retrofit. The shipyard serves both government clients (U.S. Navy, Coast Guard, NOAA, Military Sealift Command) and commercial operators, with notable contracts including the $75 million Coast Guard Polar Star Service Life Extension Program. The facility operates on an 18+ acre site with full-service capabilities including water, electrical, refrigeration, fabrication, and engineering support.

Differentiator

Problem solved

Functional benefit

Products and services

• Dry Docking Services Ship repair and dry docking services using concrete graving docks (Dry Dock 2: 720 ft x 98 ft; Dry Dock 3: 680 ft x 90.5 ft) capable of accommodating vessels under fully loaded conditions. Services include work above and below the waterline, interior and exterior hull repairs for government and commercial vessels.
• Ship Repair & Conversions Comprehensive vessel repair and conversion services for government and commercially-owned vessels, including machinery repairs, turbine overhauls, reduction gear repairs, and structural steel renewal.
• Major Overhauls Complete vessel overhaul services including turbine overhauls, reduction gear repairs, valve repairs, and major system refurbishment for maritime vessels.
• Emergency Ship Services Rapid response ship repair and emergency services available 24/7 year-round for urgent vessel maintenance needs.
• Crane Services Heavy lifting capabilities with multiple cranes including Crane B-1 (67,000 lbs / 33.5 tons), Crane D-7 (268,000 lbs / 134 tons), Crane D-3 (56,000 lbs / 28 tons), and a Grove 165-ton Rough Terrain crane.
• Vessel Berthing for Repair & Retrofit Secure berthing services with up to 1,300 linear feet across three berths (Berth 12: 650 ft, Berth 13: 400 ft, Berth 14: 200 ft), with full-service capabilities including water, CHT, electrical, refrigeration, and engineering support.
• Polar Star Service Life Extension Program Five-year, $75 million U.S. Coast Guard service life extension program for the heavy icebreaker USCGC Polar Star (WAGB-10), involving dry docking and technology modernization to ensure the longevity of the nation's only operational heavy icebreaker.

Quantifiable outcome

• Historic investment of $13 million to double workforce and prepare for Navy ship repairs
• +1 more outcomes

Named customers8 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• Cal Maritime Academy (California State University Maritime Academy)coreStrategic or Co-development Partner · 1 January 2026Cal Maritime Academy has finalized an agreement with Mare Island Dry Docks and the U.S. Maritime Administration allowing the Training Ship Golden Bear to continue relocation to Mare Island for cadet training. The arrangement sustains academic programs and watchstanding requirements despite broader dry dock operation challenges. This partnership ensures continuity of maritime education and training at the historic facility.

Scale indicators6 records

Recent moves7 records

Expansion highlights4 records

Direct peers

• Bay Ship & Yacht Co. Alameda, California-based shipyard operating floating dry docks and pier-side repair berths for commercial and government vessels in San Francisco Bay. Direct neighbor to Mare Island with overlapping West Coast commercial and federal ship repair work.
• Colonna's Shipyard: Norfolk, Virginia full-service shipyard with multiple graving and floating dry docks serving Navy, Military Sealift Command, and commercial customers. Comparable East Coast independent repair yard with similar federal contract base.
• Vigor Industrial: Largest U.S. West Coast shipyard operator, with ship repair and conversion facilities across Oregon, Washington, and Alaska. Directly comparable to Mare Island as a multi-dock, full-service commercial and government vessel repair provider on the U.S. Pacific coast.
• Atlantic Marine: Jacksonville, Florida-based shipyard providing commercial and government vessel repair, conversion, and dry docking services. Comparable independent shipyard operator with a diversified federal and commercial book of business.
• Continental Maritime of San Diego (Huntington Ingalls): San Diego shipyard owned by Huntington Ingalls Industries performing ship repair, maintenance, and modernization for U.S. Navy and commercial customers on the West Coast. Directly comparable in service mix and federal customer profile.
• Pacific Ship Repair & Fabrication: Chula Vista, California shipyard providing ship repair, aluminum fabrication, and dry docking primarily for government and commercial vessels in Southern California. Comparable mid-sized West Coast ship repair operation.

Broad incumbents

• BAE Systems San Diego Ship Repair: Operates a major West Coast ship repair yard in San Diego serving U.S. Navy, Coast Guard, and commercial customers with dry docking and modernization capabilities. Large incumbent peer with overlapping naval/government workload.
• Norfolk Naval Shipyard (U.S. Navy): U.S. Navy-operated shipyard in Portsmouth, Virginia focused on nuclear submarine and aircraft carrier repair. Provides a benchmark for the type of federal depot maintenance capability Mare Island's MIL-STD certification positions it adjacent to.
• General Dynamics NASSCO: San Diego shipyard and the only major West Coast builder of new ocean-going U.S. Navy ships, also performing repair and conversion work. Broader incumbent with significant overlap in Navy surface combatant support alongside commercial and government services.
• Puget Sound Naval Shipyard (U.S. Navy): U.S. Navy-operated shipyard in Bremerton, Washington performing nuclear submarine maintenance and modernization. Sets the operational benchmark on the West Coast for large-vessel Navy repair work that Mare Island is certified to compete for.

Market position

Strengths3 records

Weaknesses3 records

Competitive moat4 records

Key risks5 records

Key highlights5 records

Customer concentration

• Xx.com/mareisldrydock
• Facebookfacebook.com/mareislanddrydock

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Mare Island Dry Dock