Conco West

What Conco West does

Conco West, Inc. is a privately held heavy civil engineering construction company founded in 1978 and headquartered in Manteca, California. The firm specializes in water infrastructure construction, delivering pump stations, water storage tanks (including 4.0 MG welded steel reservoirs), treatment facilities (including PFAS treatment), well sites (80+ completed), and conveyance systems for municipalities, water districts, school districts, and private developers across California's Bay Area and Central Valley. Its revenue base is derived from competitively bid public works contracts and negotiated design/build work with repeat municipal clients, with project execution governed by fixed-price contracts under public procurement frameworks.

The firm operates a design/build delivery model and self-performs its most schedule- and margin-critical scopes—structural concrete, underground utilities, and mechanical piping—rather than subcontracting them. This self-perform model is supported by an owned CARB-compliant CAT heavy equipment fleet and a construction technology stack that includes HCSS for estimating and project management, Viewpoint Spectrum for ERP, and Topcon GPS for machine control and surveying. The company holds California General Engineering Contractor licensure (A classification) plus C-57 well drilling, is California DGS-certified for state procurement, and operates as a union contractor with signatory agreements across Carpenters, Cement Masons, Laborers, and Operating Engineers trades.

The firm is led by long-tenured principals Mike DeRousse and John Onken, each with 38+ years at the company, with a workforce in which over 50% of the core team has more than 18 years of tenure and average tenure exceeds 9 years. Recent recognition includes the 2026 ACEC Engineering Excellence Honor Award for the Stoneridge Well PFAS Treatment Facility and the 2024 United Contractors R.E.A.L. Safety Award. No public revenue, headcount, backlog, or ownership/financial data are disclosed.

Name

Conco West

Legal name

Conco West, Inc.

Website

https://concowest.com

Company type

Private

Founded year

1978

Operating status

Operating

Headcount range

11–50 employees

Short description

Conco West is a privately held, 47-year-old heavy civil contractor based in Manteca, California, self-performing design/build water infrastructure—pump stations, storage tanks, PFAS treatment, and wells—for municipalities, water districts, and developers across the Bay Area and Central Valley.

Ownership category

akta.pro rank

Product category

Heavy Civil Engineering Construction

NAICS

Heavy and Civil Engineering Construction (237), Poured Concrete Foundation and Structure Contractors (23811)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623), Heavy Construction Other Than Bldg Const - Contractors (1600)

akta.pro primary industry

Storage & Conveyance Structures (Reservoirs, Tanks, Culverts, Tunnels) (IMAFAGAE)

akta.pro secondary industries

Underground Utility Duct Banks, Conduit & Vault Construction (IMAFAHAG), Concrete Pipe, Box Culverts & Drainage Structures (IMADAAAD)

Keywords

• Heavy civil construction
• Water infrastructure construction
• Design-build contracting
• Pump station construction
• Underground utility construction

Headquarters

HQ city

Manteca

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. General Contracting Services: Revenue generated as a heavy civil engineering general contractor on water infrastructure construction projects. Projects include pump stations, water storage tanks, treatment facilities, and conveyance systems. Typically awarded through competitive bidding for municipal and public works contracts.
2. Subcontractor Services: The company also serves as a subcontractor to support other general contractors and developers, providing specialized expertise in structural concrete, underground utilities, and mechanical systems.
3. Design/Build Project Delivery: Partnering with clients in design/build delivery approach providing improved engineering, greater cost effectiveness and construction efficiency from concept through completion.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels4 records

Core offering

Conco West, Inc. is a Heavy Civil Engineering and design/build general contractor that self-performs structural concrete, underground utilities, and mechanical piping for water infrastructure projects. The company builds pump stations, water storage tanks, treatment facilities, well sites, and conveyance systems for municipalities, water districts, developers, and private industry across California's Bay Area and Central Valley.

Product overview

Conco West is a Heavy Civil Engineering and design/build contractor specializing in water infrastructure construction across California's Bay Area and Central Valley. The company offers a comprehensive portfolio of construction services including structural concrete, underground utilities/pipeline installation, and mechanical systems for water resource management. Their core service offerings include water storage tank construction (reservoirs, elevated tanks), pump station construction (domestic well sites, booster stations, sewer pump stations, storm water pump stations), water treatment facility construction, and wastewater treatment facility construction. The company also provides water system repair and renovation services, and operates on a design/build delivery model where they partner with clients from project inception through completion to optimize engineering, cost effectiveness, and construction efficiency.

Differentiator

Problem solved

Functional benefit

Products and services

• Structural Concrete Construction Large-scale structural concrete construction services including dam reconstruction, elevated tank foundations, waste water treatment basins, clarifiers, storm storage basins, and industrial facilities using various forming systems. Targeted at municipalities, water districts, and private developers needing heavy civil water infrastructure.
• Underground Pipeline/Utility Construction Underground installation of pipe for water, storm water, and sewer lines, including bore and jack casings for crossings. Served to municipalities, developers, and other general contractors needing utility infrastructure.
• Water System Repair & Renovation

Quantifiable outcome

• Over 50 booster pump stations constructed ranging from under 500 GPM to facilities exceeding 10,000 GPM
• +4 more outcomes

Named customers8 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Seven partnerships are on record, tiered minor and core.

• Builders' Exchange of StocktonminorOthersIndustry trade organization affiliation providing networking, industry resources, and professional development opportunities for construction companies in the Stockton region.
• United ContractorscoreStrategic or Co-development PartnerTrade association representing union contractors. Conco West is a union contractor signatory to multiple unions including Carpenters, Cement Masons, Laborers, and Operators. Provides safety awards recognition and industry advocacy.
• DGS & Cal eProcureminorChannel Partner/ Reseller/ DistributorCalifornia Department of General Services certified contractor listed on Cal eProcure marketplace for government procurement.
• Carpenters Local 152coreOthersUnion signatory partnership for carpenters workforce. Part of United Contractors association representing union tradespeople in Northern California.
• Cement Masons Local 400coreOthersUnion signatory partnership for cement masons workforce. Part of United Contractors association.
• Laborers (LiUNA NCDCL)coreOthersUnion signatory partnership for laborers workforce through Northern California District Council of Laborers (NCDCL).
• Operating Engineers Local 3coreOthersUnion signatory partnership for operating engineers workforce. Part of United Contractors association.

Scale indicators15 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Granite Construction: One of the largest heavy civil contractors in California and the western U.S., active across water infrastructure, transportation, and public works. Directly comparable to Conco West given shared California footprint, competitive bidding model, and overlapping water/wastewater construction capabilities.
• Sukut Construction: California-based heavy civil contractor specializing in grading, drainage, and water infrastructure. Comparable to Conco West in its regional concentration on California public works and water-related scopes.
• Teichert Construction: California-headquartered heavy civil and grading contractor with deep water and infrastructure expertise. Directly comparable to Conco West in terms of regional California focus, public-sector water project work, and design/build delivery.
• Barnard Construction Company: Heavy civil contractor specializing in water/wastewater treatment, pipeline, and reservoir construction. Directly comparable to Conco West in technical capabilities and self-perform model, though operating nationally rather than regionally.
• Mountain Cascade, Inc. California-based heavy civil general contractor focused on water and wastewater infrastructure, including pump stations, pipelines, and treatment plants. Closely comparable niche and customer base to Conco West.
• Walsh Construction: U.S. heavy civil and water infrastructure contractor active in pump stations, treatment facilities, and underground utilities. Directly comparable to Conco West in core service mix and design/build delivery.

Others

• Black & Veatch: Global EPC and engineering firm focused on water, wastewater, and energy infrastructure. Adjacent to Conco West's contracting business, often acting as designer or competitor on large municipal water treatment and pipeline projects.
• Stantec: Global engineering and design firm with a strong water practice that frequently partners with contractors like Conco West on design/build water projects. Adjacent rather than competitive, but materially relevant as a typical project partner.

Broad incumbents

• McCarthy Building Companies: Large, diversified U.S. general contractor with significant California presence across water infrastructure, healthcare, and education. Comparable where its water portfolio overlaps with Conco West, but broader in scope and scale.
• Kiewit Corporation: One of North America's largest heavy civil contractors with extensive water/wastewater infrastructure capabilities. Comparable to Conco West where it competes on large municipal water projects, though Kiewit operates nationally across many infrastructure categories.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Conco West