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Culvert Design, Replacement & Repair Services

Control Roadway Runoff and Maintain Safe, Efficient Drainage Crossings

Culverts play a critical role in municipal stormwater systems—channeling runoff beneath roads, driveways, trails, and rights-of-way. When they’re undersized, damaged, or misaligned, they become a major risk for flooding, erosion, and infrastructure failure. At Diversified Drainage, we design, install, and repair culverts for cities, counties, and public works departments across Minnesota. From engineered replacements to emergency repairs, we ensure your culverts flow freely and meet hydraulic requirements.


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/OUR PROCESS

About the Service: What We Do

We provide complete culvert services for public infrastructure and municipal drainage systems, including:

Our Catch Basin Installation Capabilities

  • Culvert Sizing & Hydraulic Design
    Determine appropriate diameter, slope, and material based on flow rates, contributing area, and outlet conditions.
  • New Culvert Installation
    Install culverts under roadways, driveways, access routes, and trails—meeting MnDOT, city, or county specifications.
  • Culvert Replacement & Upsizing
    Replace failing or undersized culverts to improve flow and reduce flood risk.
  • Emergency Culvert Repair
    Respond quickly to washouts, collapse, or inlet erosion with temporary or permanent repair options.
  • Headwall & End Section Construction
    Prevent erosion and provide structure at the inlet/outlet with properly installed concrete or steel end treatments.
  • Erosion Control & Channel Protection
    Line ditches, install riprap, or regrade slopes to prevent scour and maintain system performance.
  • Culvert Tie-In to Catch Basins & Storm Systems
    Connect culverts to adjacent stormwater infrastructure for a seamless flow path.
/Municipal-Grade Solutions

Why Cities and Counties Work With Us

Engineered for Flow and Longevity - We design culverts that meet both peak flow demands and long-term durability expectations.
Built to Spec, Sized for Capacity - Our systems meet the latest design standards—no undersized pipes, no shortcuts.
Responsive to Emergencies and Retrofits - We’re ready to mobilize for culvert failures, replacements, or re-alignments as needed.
Freeze/Thaw and Traffic-Ready - Our installations are built to withstand winter frost heave, salting, and heavy vehicular loads.
Experienced in Permitting & Specs - We coordinate with counties, watersheds, and municipalities to ensure designs meet all requirements.
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Where We Install & Repair Culverts

We install culverts for:
County and township roadways
Driveway and private access points (under public permit)
Trails and park systems
Ditch and drainage channel crossings
Rural water management projects

Built for Minnesota Infrastructure

Our culvert systems are designed to handle:
Snowmelt surges and spring flood events
Sediment-heavy runoff and vegetation choke points
Poorly draining clay or peat soils
Frost heave and winter road conditions
Long-term hydraulic capacity requirements

Why Choose Diversified Drainage? 

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25+ Years of Experience

With over two decades of hands-on experience, we’ve seen—and solved—every kind of drainage issue for both homes and commercial properties.

Fully Licensed & Insured

Our team is fully licensed, insured, and qualified to work on residential neighborhoods, large-scale commercial sites, and everything in between.

Local Expertise

As a Plymouth-based company, we understand the soil, slope, and drainage challenges unique to Minnesota properties.

Effective Solution Design

We provide high-quality drainage systems that are both cost-effective and built to perform season after season.

Customer-first Service

From homeowners to property managers, we prioritize clear communication, honest recommendations, and long-term results.

Ready to Upgrade or Replace a Failing Culvert?

Don’t wait for the next washout. Diversified Drainage provides expert culvert design, repair, and replacement services for municipalities and public works teams across Minnesota.
(763) 443-0575
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Municipal Drainage FAQs

Proper municipal drainage starts with the right system—and a clear understanding of how it works. Explore these FAQs to learn more about drainage.

How do I know if a culvert needs to be replaced?

Signs include sagging, separation at joints, inlet erosion, ponding upstream, or structural collapse. We can assess and recommend repair or replacement.

Do you follow MnDOT or county culvert standards?

Yes—we build to the governing agency’s specifications and can provide submittals or design documentation as needed.

Can you upsize an existing culvert for better capacity?

Absolutely. We design replacements to handle larger flow volumes, especially in areas with recurring washouts or flood events.

What types of culvert pipe do you install?

We work with HDPE, CMP, RCP, and reinforced concrete based on the site conditions, load rating, and spec requirements.