Precast concrete drainage inlets are the ideal solution for areas where flooding could be a concern. The Pacific Northwest sees enough rainfall and snowmelt to make inlets a necessary addition to many construction jobs. Inlets are used in residential and commercial applications to collect excess stormwater and reduce the amount of standing water.

Also known as catch basins, inlets act as the first step in a drainage system. Inlets can be found in parking lots, by curbs, or in municipal parks where drainage is an issue. Most Inlets are buried with just a grate visible from the surface.

Regardless of the form — drop inlets, curb inlets, etc. — once captured, the water is taken away through drainage systems as part of city, county, and state infrastructure.

Working within strict governmental specifications, Columbia Precast Products manufactures products that meet all state codes. We provide consistent quality, custom solutions, and a fast turnaround time.

Green Production

Best of all, our precast concrete solutions are customizable and infinitely reproducible, without all the unnecessary waste that often goes into the production of other concrete products.

Our commitment to sustainability and green production processes means you can rely on us to deliver not only the highest quality and most durable concrete infrastructure products, but to do so in a way that honors and protects our shared environment.

In fact, our manufacturing standards are so rigorous that we became the first precast concrete plant in the buried infrastructure industry to earn SMaRT certification.

What does this distinction mean for our partners? It means our production teams focus on the twin pillars of public health and the environment. We utilize renewable energy sources, reduce our energy consumption, and create our durable products using materials that are bio-based and/or recycled.

At Columbia Precast Products, we create our concrete forms using natural materials that do not emit volatile organic compounds (VOCs). We design our products to be strong, resilient, and green.

Let us know if you have any questions about our SMaRT certification or about our production processes in general.

Through All Kinds of Weather …

Columbia Precast Products understands the Pacific Northwest and the amount of rain the region gets during the fall, winter, and spring seasons. So we make it a priority to manufacture inlets for every situation in this region.

Precast concrete is the popular choice for drainage inlets, including:

  • Easy installation
  • Strength properties
  • Low maintenance
  • Durability
  • Sustainability

Easy installation

Once the excavation is complete, inlets can be dropped in or assembled in place on the same day. In difficult areas where custom pieces are needed, pour-in-place options just aren’t feasible.

Unmatched strengthPrecast concrete drainage inlets from Columbia Precast Products

Columbia Precast Products manufactures inlets in a controlled environment, assuring quality during every step of concrete production. From mixing the cement to the final curing process, we are able to make a consistently superior inlet.

Low maintenance

Concrete is naturally impervious to rotting, warping, or animal infestation, so no additional treatment is needed after installation.


Repairs are few and far between as our inlets are made to last for years. We can make that claim because all of our products are strength tested before leaving the facility.


By using recycled steel to reinforce our products, reusing process water, and repurposing waste concrete, we strive to be as environmentally sound as possible. We work here and we live here and we want to do our part to keep it beautiful.

Are you in the process of developing property where drainage issues are a given? Contact Columbia Precast Products to see how we can help. No shape, size, or custom considerations are beyond our capabilities. We have more than 140 years of accumulated experience and look forward to providing you with precast concrete solutions.