Drainage structures

Drainage Structures

Engineered for Strength, Precision, and Long-Lasting Performance

We provide catch basins, drywells, inlets, and more, designed for efficient stormwater management and long-term durability. Built for strength and easy installation, our drainage structures keep water flowing and infrastructure protected.

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Dependable Quality in Every Drainage Structure

Specializing in drainage structures, INW Precast delivers efficient water management solutions essential for controlling flow, preventing flooding, and ensuring proper drainage in both urban and rural environments.

Some of the benefits include:

In-depth expertise in stormwater drainage plans among staff
Extensive selection for diverse needs
Crafted with premium materials for lasting performance

Drainage structures

Explore Drainage Structure Options

Catch Basins, Drywells, and Inlets specified to meet municipal specifications.

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01

City of Post Falls/Hayden

Open Bottom Drywell

02

City of Spokane (COS)

Concrete Inlet, Catch Basin, Drywell

03

Spokane County

Drywell, Special Curb Inlet

04

Idaho Transportation Department (ITD)

Catch Basin, Inlet

05

Washington State Department of Transportation (WSDOT)

Catch Basin, Concrete Inlet, Grate Inlet

INW Precast Drainage Structure Projects

Real Projects, Real Results – Discover Our Work

Spokane, WA