Company lists · Data refreshed September 2026
Top 25 Dam and levee engineering companies based in the United States
RevenueBase identified 150 dam and levee engineering companies headquartered in the United States as of September 2026 and tracks 25,289 professional contacts across them, including 9,154 with verified work emails. Houston is the largest hub.
This list covers dam and levee engineering companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest dam and levee engineering companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 12,999 contacts → | ||||
Partial evidence “Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 2 | 7,527 contacts → | ||||
Indirect evidence “CDM Smith is shaping what’s next, now, with world class solutions in water, environment, transportation and energy to public and private clients worldwide.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 3 | 707 contacts → | ||||
Indirect evidence “Schnabel is a trusted partner in building the foundation for project success.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 4 | 592 contacts → | ||||
Indirect evidence “Manson is one of the nation’s leading heavy civil marine construction and dredging companies.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 5 | 322 contacts → | ||||
Partial evidence “The GIS Industrial Engineering & Construction team offers clients a single point of contact to utilize our 19 strategically located facilities, employees, and 21 service lines.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 6 | 267 contacts → | ||||
Indirect evidence “Christopher B.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 7 | 225 contacts → | ||||
Partial evidence “Waggoner Engineering, Inc.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 8 | 165 contacts → | ||||
Partial evidence “RIZZO International, Inc.(RIZZO) is a global engineering and consulting firm headquartered in Pittsburgh, Pennsylvania US.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 9 | 135 contacts → | ||||
Partial evidence “Water Works Engineers is a leading civil and environmental engineering firm specializing in innovative and sustainable solutions for water infrastructure projects across the…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 10 | 129 contacts → | ||||
Partial evidence “Donohue & Associates is an employee-owned, multi-disciplined engineering firm dedicated to one focus: water.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 11 | 128 contacts → | ||||
Partial evidence “CWE, an Apex Company, is a dynamic, award-winning civil engineering firm composed of engineers, scientists, designers, and construction support professionals.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 12 | 120 contacts → | ||||
Indirect evidence “For over 25 years, Wildcat Construction has been a regional leader in bridge building and rehabilitation, concrete structures, plant construction, storm and sanitary sewers, water…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 13 | 100 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 14 | 94 contacts → | ||||
Partial evidence “ASI Construction LLC (ASI), a proud member of the Shaft Drillers International (SDI) family of companies, is a self-performing Heavy Civil Contractor specializing in Dam…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 15 | 87 contacts → | ||||
Partial evidence “Founded in 1965, D&B Engineers and Architects (D&B) is committed to improving quality of life with innovative engineering solutions in sustainable, environmentally acceptable…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 16 | 85 contacts → | ||||
Indirect evidence “Bowen Collins & Associates, Inc.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 17 | 74 contacts → | ||||
Partial evidence “Gahagan & Bryant Associates, Inc.(GBA) is a unique engineering firm that specializes in providing consulting and engineering services for a variety of projects, including port…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 18 | 64 contacts → | ||||
Partial evidence “In business for over 22 years, ICON Engineering is one of Denver’s most reputable planning, design, and project management civil engineering firms.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 19 | 62 contacts → | ||||
Partial evidence “Located in Sacramento, California, MBK Engineers (formerly Murray, Burns & Kienlen, Consulting Civil Engineers) has provided clients with complete engineering and consulting…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 20 | 59 contacts → | ||||
Partial evidence “K Friese + Associates (KFA) provides civil engineering consulting services to our public sector clients with special emphasis on water, wastewater, transportation and drainage…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 21 | 52 contacts → | ||||
Strong evidence “AMI is driving innovation in Ports & Harbors, Coastal & Riverine, Waterfronts & Marinas, Dams & Levees, Buildings, and Industrial Facilities.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 22 | 45 contacts → | ||||
Indirect evidence “Soletanche Bachy International is a Geotechnical General Contractor that delivers turn key projects all over the world.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 23 | 44 contacts → | ||||
Indirect evidence “Stemming from water resources, our passion to enhance and preserve our environment has deepened through exciting and diverse projects.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 24 | 43 contacts → | ||||
Strong evidence “At RJH, we deliver solutions to some of the most challenging problems facing dam and levee owners.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 25 | 32 contacts → | ||||
Partial evidence “Midwestern is a full-service consulting and engineering firm specializing in water resources.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: dam and levee engineering companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names dam and levee engineering companies.
- Partial evidence
- Its own public description names part of dam and levee engineering companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name dam and levee engineering companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 150 dam and levee engineering companies based in the United States
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Dam and levee engineering companies based in the United States at a glance
As of Sep 16, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 150 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among dam and levee engineering companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “dam and levee engineering companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names dam and levee engineering companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among dam and levee engineering companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 9,154 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 16, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names dam and levee engineering companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many dam and levee engineering companies are there based in the United States?
RevenueBase identified 150 dam and levee engineering companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Tetra Tech, headquartered in Pasadena, tops this list with the largest team on record.
Which city has the most dam and levee engineering companies?
Houston leads with 8 headquartered companies, followed by Irvine (3) and Sacramento (3).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 9,154 verified decision-maker contacts tracked across these 150 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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