Company lists · Data refreshed October 2026

Top 25 Mining hydrology companies based in the United States

RevenueBase identified 273 company matches for mining hydrology companies associated with the United States as of October 2026 and tracks 5,810 professional contacts across them, including 2,310 with verified work emails. Denver is the largest hub.

This list covers company matches for mining hydrology companies associated with the United States, 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 October 18, 2026.

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 Oct 18, 2026 How this list was built
273Companies
5,810Contacts tracked
2,310Verified emails
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The 25 largest mining hydrology companies based in the United States

Ranked by team size
Top 25 of 273 company matches for mining hydrology companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 18, 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 matchDenver, CO, United StatesHQ recorded Oct 18, 20261,001-5,0001,326 contacts →

Exact match

“Knight Piésold is an employee-owned, global consulting firm providing specialist services to the mining, power, water resources, and infrastructure industries.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
2Exact matchAustin, TX, United StatesHQ recorded Oct 18, 2026201-500281 contacts →

Exact match

“Established in 1974, INTERA is a geosciences and engineering consulting firm focused on providing water resources and supply, environmental, mining, radioactive waste isolation…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
3Exact matchFort Collins, CO, United StatesHQ recorded Oct 18, 202651-200147 contacts →

Exact match

“Ensero Solutions is an environmental consulting and remediation business with specific expertise in environmental assessments and permitting solutions, mine water management…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
4Exact matchOntario, CA, United StatesHQ recorded Oct 18, 2026201-500132 contacts →

Exact match

“Geo-Logic Associates, Inc.(GLA) is an employee-owned, multidisciplinary consulting firm.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
5Exact matchTucson, AZ, United StatesHQ recorded Oct 18, 202651-200126 contacts →

Exact match

“M&A is a water resource consulting firm that partners with clients to address their evolving water resource challenges.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
6Exact matchSan Francisco, CA, United StatesHQ recorded Oct 18, 2026201-500103 contacts →

Exact match

“PJ is a pipeline company that combine slurry transport system expertise with our experience in all phases of EPCM delivery.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
7Exact matchHarrisburg, PA, United StatesHQ recorded Oct 18, 202651-20091 contacts →

Exact match

“Established in 1969, Skelly and Loy is a privately owned, mid-sized corporation with 6 Mid-Atlantic offices.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
8Exact matchAlbuquerque, NM, United StatesHQ recorded Oct 18, 202651-20089 contacts →

Exact match

“Daniel B.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
9Exact matchSan Diego, CA, United StatesHQ recorded Oct 18, 202651-20084 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
10Exact matchDavis, CA, United StatesHQ recorded Oct 18, 202651-20079 contacts →

Exact match

“Larry Walker Associates (LWA) is a privately owned firm headquartered in Davis, California, with offices in Berkeley, Yreka, Santa Monica, Ventura, San Diego, and Seattle, WA.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
11Exact matchButte, MT, United StatesHQ recorded Oct 18, 202651-20076 contacts →

Exact match

“Water & Environmental Technologies (WET) is a full-service environmental and civil consulting and engineering firm located in Butte, Montana, with branch offices in Anaconda…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
12Exact matchTrenton, NJ, United StatesHQ recorded Oct 18, 202651-20071 contacts →

Exact match

“Experience, Expertise and Excellence in Water Resources, Ecology, and Geotechnical Engineering.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
13Exact matchPortland, OR, United StatesHQ recorded Oct 18, 202651-20070 contacts →

Exact match

“GSI Water Solutions, Inc, is a specialized groundwater, environmental, and water resources consulting firm.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
14Exact matchDenver, CO, United StatesHQ recorded Oct 18, 202611-5065 contacts →

Exact match

“Wright Water Engineers, Inc.(WWE) is a water resources consulting engineering firm that was founded in 1961.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
15Exact matchDenver, CO, United StatesHQ recorded Oct 18, 202651-20062 contacts →

Exact match

“LRE Water is now Spheros Environmental.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
16Exact matchLakewood, CO, United StatesHQ recorded Oct 18, 202611-5058 contacts →

Exact match

“Tierra Group International, Ltd.(Tierra Group) was formed in January 2012 by Matt Fuller, CPG and Pete Kowalewski, P.E.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
17Exact matchTucson, AZ, United StatesHQ recorded Oct 18, 202651-20056 contacts →

Exact match

“CALL & NICHOLAS (CNI) is an international mining consulting firm that specializes in geological engineering, geotechnical engineering, and hydrogeology.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
18Exact matchRockville, MD, United StatesHQ recorded Oct 18, 202651-20046 contacts →

Exact match

“S.S.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
19Exact matchScottsdale, AZ, United StatesHQ recorded Oct 18, 202611-5042 contacts →

Exact match

“Clear Creek Associates, a hydrogeological consulting company, was started in September to provide a very high level of expertise in groundwater science.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
20Exact matchMishawaka, IN, United StatesHQ recorded Oct 18, 202651-20041 contacts →

Exact match

“Since 1973, Peerless-Midwest, Inc.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
21Exact matchTucson, AZ, United StatesHQ recorded Oct 18, 202611-5041 contacts →

Exact match

“GeoSystems Analysis, Inc.(GSA) has pioneered innovative solutions for industry and government since 1994.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
22Exact matchBerkeley, CA, United StatesHQ recorded Oct 18, 202611-5039 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
23Exact matchSan Rafael, CA, United StatesHQ recorded Oct 18, 202651-20030 contacts →

Exact match

“Stetson Engineers is an environmental consulting firm which works with Department of Justice, Department of Defense, Department of Interior, Tribal, private, municipal, county…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
24Exact matchGolden, CO, United StatesHQ recorded Oct 18, 202611-5027 contacts →

Exact match

“PG Environmental (PG) is an environmental consulting firm offering specialized technical expertise to federal and state agencies tasked with protecting and restoring our nation’s…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
25Exact matchSan Dimas, CA, United StatesHQ recorded Oct 18, 202611-5025 contacts →

Exact match

“Geoscience Support Services (GEOSCIENCE) provides vital, specialized consulting to help clients overcome their most complex groundwater resource challenges.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase

Showing 25 of 273 mining hydrology companies based in the United States

See the full list, filter by size, metro and specialty, and access 2,310 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Mining hydrology companies based in the United States at a glance

As of Oct 18, 2026
39.8%Verified-email coverage
21.3Average contacts per company
1-10Median size (employees)
5.5%Largest-city concentration · Denver
Oct 18, 2026Page data refreshed

Companies by employee count

1-10
168
11-50
69
51-200
27
201-500
5
1,001-5,000
2
5,001-10,000
1

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 273 companies.

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.
What qualifies
Company records associated with the United States whose business descriptions match “mining hydrology companies” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 2,310 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 October 18, 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.

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 “mining hydrology companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many mining hydrology companies are there based in the United States?

RevenueBase identified 273 company matches for mining hydrology companies associated with the United States as of October 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?

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

Which city has the most mining hydrology companies?

Denver leads with 15 company records, followed by Portland (7) and Golden (6).

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 2,310 professional contacts with verified work emails tracked across these 273 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 October 18, 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.