Marine Construction & Dredging Contractor
The industry — Other heavy and civil engineering construction
Base industry report for 2379 →- Establishments · CanadaA
- 1,430
- Under 10 employeesA
- 62%
- Establishments · USA
- 4,673
- Employment · USA
- 82,453
- Payroll · USA
- $7.5B
Of 1,430 Canadian establishments with employees, 62% have fewer than ten — mostly small operators.
Entry signal — what decides who wins here
Structure decidesThe binding constraint is not executional. Being better than the incumbent does not, by itself, get you in — this one is cleared with capital, an asset, or a permission.
Come with the asset, or buy the business that owns it. Plant, fleet, land or quota decide this market before any operating skill does. Operators here are bought, not started.
Measured, not forecast: the share of US establishments opening in one year that were still active later. It counts good operators and bad ones together, which is exactly why it is the honest answer to “what are the odds”. It is for the whole sector rather than this market, and the ten-year figure comes from an older cohort because no younger one has reached ten years.
This is not a probability of success, and it is not a verdict on you. No survival probability is published per market, and inventing one would be worse than saying so. What the bar reads is how much of the outcome sits inside an operator's control: green means the hurdles are ones a better operator clears, red means the binding constraint is capital, an asset or a permission rather than execution. Someone arriving with an advantage this screen did not assume can win a market shown in red.
Companies named in this market · 4
The binding constraint — capital intensity
The pre-screen called this the corner of heavy civil where a small contractor can still get in, and the business counts half agree: 62% of the 1,430 Canadian establishments have fewer than ten employees [A]. But the code holds two different businesses. The open end — parks, trails, drainage, small shoreline work — is open because nothing protects it: any contractor with an excavator can bid a municipal tender, and it meets the same prequalification and bonding wall that cut Utility System Construction (2371), without that record's funded programmes behind it. The end that is protected is on the water, and what protects it is the fleet. Great Lakes Dredge & Dock, the largest US dredger, reported record 2025 revenue of $888.3M and spent $143.9M on capital in the same year — sixteen cents of every revenue dollar — of which $69.1M went into a single vessel, the Acadia, and $32.3M into another [A]. In February 2026 it agreed to be bought by Saltchuk for $17.00 a share, a $1.5B transaction [A]: the price of a working fleet with its crews and its backlog, which fell from $1.2B to $763.2M of dredging work in the year [A]. Marine work is awarded to the contractor who already owns the barge, the crane and the dredge and can show them working. An entrant has to buy the plant before it can qualify to bid, then keep it busy on lumpy public tenders. The enterable end is undefended; the defended end is bought with steel.
Owners are port authorities, federal small-craft-harbour and navigation programmes, provinces and municipalities, each tendering project by project. Floating plant is slow and costly to move, so contractors compete within a coast or a waterway system rather than nationally; the land-side work (parks, trails, drainage) is narrower still, bid municipality by municipality.
Who you would be competing with
The operators already at scale here, and whoever is buying these businesses. In most of these industries the competition an entrant meets is local, so this is who sets the terms rather than a list of everyone in the trade.
Financials & market size — sourced
Figures that came from a filing, a results release or reputable reporting, each carrying its evidence tier.
Market size, derived
Built from the competitor set upward rather than quoted from a forecast. Published TAMs in these categories are frequently reverse-engineered from each other, so any published figure is checked against the vendor arithmetic rather than trusted on its own.
Disclosed revenue from 2 of 4 named vendors. The market is at least this large.
No vendor has both a disclosed revenue and a published share.
Only a revenue floor is known — the true market is larger by whatever the undisclosed vendors earn.
Competitor set · 4 named · 2 disclose revenue
| Name | Revenue | Share | Note |
|---|---|---|---|
| Great Lakes Dredge & DockNASDAQ: GLDDA | $888M | — | FY2025 revenue; agreed in February 2026 to be acquired by Saltchuk |
| Orion Group HoldingsNYSE: ORNA | $852M | — | FY2025 total revenue; the marine segment was US$544.8M of it |
| Weeks Marine / Manson ConstructionC | not disclosed | — | Named as the other large US marine contractors an entrant would meet on a big tender; not researched for this record and neither publishes. |
| Canadian private marine and dredging contractorsA | not disclosed | — | 1,430 establishments, 593 of them with 1–4 employees and 294 with 5–9 (Statistics Canada, December 2023); nine have 500 or more. No Canadian operator in this code publishes financials. |
Evidence
Evidence. Great Lakes Dredge & Dock's revenue, capital expenditure and backlog are read from its Q4/FY2025 results release, and the Saltchuk terms from the joint announcement of 11 February 2026 [A]. The business counts are Statistics Canada and US Census figures supplied with the work list [A]. What these do not establish: GLDD is a US Jones Act dredger at a scale no Canadian contractor in this code approaches, and no Canadian marine contractor's financials were found — the Canadian names in this field are private. It is evidence for how capital-heavy the defended end is, not a measure of the Canadian market. The description of the land-side end (parks, trails, drainage) as undefended low-bid work is analyst judgment and was not sourced. The cut factor is analyst judgment. Orion Group Holdings' consolidated and marine-segment revenue, segment operating income, backlog, workforce and the terms of its J.E. McAmis purchase were read in its 2025 Form 10-K [A]; the 5.5% marine operating margin is arithmetic on two disclosed segment figures, not a stated ratio, and Orion is a US Gulf, Pacific and Caribbean contractor whose results say nothing directly about Canadian tenders. The software sold to heavy civil contractors is screened separately at 237.
Where the industry talks
The associations, forums and events where people in this trade actually talk shop — where to listen before entering, and where the first customers are found. Each link was opened on the date shown.
Regional chapters across North and Central America; Journal of Dredging, webinars and technical commissions.
WEDA's annual technical conference and trade show for dredging and marine construction.
European-based dredging body with national sections, workshops and the Dredgepoint equipment database.
Regional chapters, PileDriver magazine and a member directory; covers the foundation side of marine work.
Weekly inland marine trade title with a dredging and marine construction section; dredgemag.com now redirects here.
Blocked automated access (Cloudflare). Search shows it live, with an annual meeting held April 2026.
Software serving this industry
Vertical software markets filed along the same branch of NAICS — who sells to these businesses, and who an entrant would have to displace.