Company lists · Data refreshed November 2026

Top 25 Spillway design firms worldwide

RevenueBase identified 1,621 company matches for spillway design firms worldwide as of November 2026 and tracks 44,110 professional contacts across them, including 17,107 with verified work emails. The United States is the largest market and Tehran the largest hub.

This list covers company matches for spillway design firms worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for spillway design firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
1,621Companies
44,110Contacts tracked
17,107Verified emails
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The 25 largest spillway design firms worldwide

Ranked by team size
Top 25 of 1,621 company matches for spillway design firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchPasadena, CA, United StatesHQ recorded Nov 6, 202610001+14,232 contacts →

Exact match

“Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchUnited StatesHQ recorded Nov 6, 20261,001-5,0001,356 contacts →

Exact match

“Consor is a leading engineering and consulting firm advancing intelligent, future-ready infrastructure across transportation and water systems.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchMobile, AL, United StatesHQ recorded Nov 6, 20261,001-5,0001,244 contacts →

Exact match

“Volkert’s history began in 1925 when it was founded in New Orleans as Doullut & Erwin to provide waterfront and heavy construction services, as well as airport design services…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchShinjuku-ku, JapanHQ recorded Nov 6, 2026201-500783 contacts →

Exact match

“Oriental Consultants Global is a consulting company based in Japan that facilitates development in countries all around the world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchGlen Allen, VA, United StatesHQ recorded Nov 6, 2026501-1,000767 contacts →

Exact match

“Schnabel is a trusted partner in building the foundation for project success.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchRio De Janeiro, BrazilHQ recorded Nov 6, 2026201-500696 contacts →

Exact match

“Sondotécnica was founded in 1954.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchEau Claire, WI, United StatesHQ recorded Nov 6, 2026201-500467 contacts →

Exact match

“In 1959, Owen Ayres founded Ayres Associates atop a steadfast foundation of honesty, innovation, and good old-fashioned hard work – and a vision for a firm that revolved around…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchChicago, VA, United StatesHQ recorded Nov 6, 2026201-500433 contacts →

Exact match

“In 1979, Collins Engineers, Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchBarueri, BrazilHQ recorded Nov 6, 2026201-500362 contacts →

Exact match

“A ENGECORPS Engenharia S.A.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchMarlborough, AZ, United StatesHQ recorded Nov 6, 202651-200318 contacts →

Exact match

“Tata & Howard is a 100% employee owned, award-winning, specialized consulting engineering firm dedicated to providing superior client service coupled with delivering…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchDublin, IrelandHQ recorded Nov 6, 2026201-500314 contacts →

Exact match

“Nicholas O'Dwyer Ltd, Consulting Engineers, provide water engineering, environmental engineering and civil and structural engineering services to public and private sector clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchDavis, OR, United StatesHQ recorded Nov 6, 2026201-500296 contacts →

Exact match

“West Yost is a water-focused consulting engineering firm ranked by Fortune Magazine as one of the “Best Small and Medium Workplaces in Consulting and Professional Services” 2023 -…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchMacquarie Park, AustraliaHQ recorded Nov 6, 2026201-500245 contacts →

Exact match

“Freyssinet is a versatile contractor that offers innovative solutions spanning from design to implementation for Specialist Civil Engineering and Structure Remediation projects.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchChicago, IL, United StatesHQ recorded Nov 6, 2026201-500226 contacts →

Exact match

“Infrastructure Engineering Inc.(IEI) is a majority African American-owned, multi-disciplinary consulting firm with offices in eight states that delivers design engineering…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchSeoul City, South KoreaHQ recorded Nov 6, 20261,001-5,000223 contacts →

Exact match

“DOHWA ENGINEERING CO, LTD.(DOHWA) is one of the top reputed civil engineering firms in South Korea, established in 1957 as the first one of its kind in the country.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchAnkara, TürkiyeHQ recorded Nov 6, 2026201-500212 contacts →

Exact match

“TEMELSU is a well known Turkish consulting engineering company which provides multidisciplinary engineering services, locally and internationally, since its foundation in 1969.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchParis, FranceHQ recorded Nov 6, 2026201-500203 contacts →

Exact match

“Bureau d’études techniques fondé en 1974, setec hydratec s’est positionné en tant qu’expert sur tous les sujets liés à l’ingénierie de l’eau et des sites et sols pollués, afin de…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchGreenwood, SC, United StatesHQ recorded Nov 6, 202651-200194 contacts →

Exact match

“At Davis & Floyd, we design and engineer innovative solutions that enrich the world around us.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchBraunschweig, GermanyHQ recorded Nov 6, 202651-200192 contacts →

Exact match

“CES Consulting Engineers Salzgitter GmbH is an independent consulting engineering company with worldwide experience.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchRiverside, CA, United StatesHQ recorded Nov 6, 202651-200191 contacts →

Exact match

“Albert A.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchLincoln, RI, United StatesHQ recorded Nov 6, 202651-200182 contacts →

Exact match

“Established in 1970, Pare Corporation has been a trusted engineering partner to municipal and state governments, architects, and owner/developer teams for 50 years.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchPittsburgh, NY, United StatesHQ recorded Nov 6, 202651-200179 contacts →

Exact match

“RIZZO International, Inc.(RIZZO) is a global engineering and consulting firm headquartered in Pittsburgh, Pennsylvania US.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchLas Vegas, NV, United StatesHQ recorded Nov 6, 202651-200176 contacts →

Exact match

“GCW is a leading provider of a complete range of services related to civil engineering (traffic and transportation engineering, land planning, water, wastewater, hydraulics, flood…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchSliedrecht, NetherlandsHQ recorded Nov 6, 202651-200164 contacts →

Exact match

“About the company: Van den Herik: hydraulic engineering in all its guises Van den Herik has been active in the field of hydraulic engineering since the 1940s.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchReading, PA, United StatesHQ recorded Nov 6, 202651-200159 contacts →

Exact match

“HELPING CLIENTS MAKE MORE INFORMED DECISIONS Entech Engineering, Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 1,621 spillway design firms worldwide

See the full list, filter by size, metro and specialty, and access 17,107 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Spillway design firms worldwide at a glance

As of Nov 6, 2026
38.8%Verified-email coverage
27.2Average contacts per company
1-10Median size (employees)
1.6%Largest-city concentration · Tehran
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
825
11-50
547
51-200
160
201-500
43
501-1,000
12
1,001-5,000
9
5,001-10,000
2
10001+
1

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage
Every country. Country and city lists for spillway design firms are linked below.
What qualifies
Company records worldwide whose business descriptions match “spillway design firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 17,107 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Spillway design firms by location

12 lists · largest first

Every Spillway design firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “spillway design firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many spillway design firms are there worldwide?

RevenueBase identified 1,621 company matches for spillway design firms worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Tetra Tech tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most spillway design firms?

The United States leads with 426 companies, followed by Italy (82) and Germany (81). Every spillway design firms list by country and city is linked on this page.

Which city has the most spillway design firms?

Tehran leads with 26 company records, followed by Ankara (14) and Sao Paulo (14).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 17,107 professional contacts with verified work emails tracked across these 1,621 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.