Drop Inlets & Catch Basins

Storage for Excess Rain & Storm Water

A catch basin is a type of drainage inlet designed to collect excess rain and storm water runoff from roofs, sidewalks, parking lots, and paved streets.

Manufactured to Meet City or State Requirements

Cemcast Pipe and Precast catch basins are precisely engineered and manufactured in a wide range of sizes to meet all state and local standards. They are a fast, effective and economical way to save time and money on your next project.

We make round and square storm sewer drop inlets, catch basins, and junction boxes. Both round and square structures can be made with A-LOK gaskets, eliminating concrete collars. We can also make these structures with rough openings when it is preferable for the contractor to provide the concrete collar.


When the South Dakota DOT needed storm sewer inlets for the Highway 50 project in Yankton, Cemcast Pipe and Precast proposed a precast solution that would save time and labor – replacing the specified poured-in-place structures with a precast concrete system. SDDOT agreed to allow Cemcast to prove the benefits of gasketed precast inlets as a “test” project.

The speed of installation combined with quality precast products made the project a big success. When our inlet arrived on the jobsite, the contractor had already excavated and laid reinforced concrete pipe up to the inlet location. The inlet is a large structure – 7’ deep and 11’ wide inside dimensions. With matching lid, it weighs in at 32,000 pounds. The contractor set the inlet, inserted 48” pipes into each end of the box, placed the lid, and backfilled – all in one day.

The Cemcast gasketed storm sewer enabled the contractor to backfill without having to pour a concrete collar. Concrete collars can leak and eventually fail, which is why municipalities don’t like them. Our gasketed pipe creates a watertight connection to 13 psi, saves time and labor in the field, and eliminates the poured-in-place collar. It’s a win for both the contractor and the municipality.

Precast Options Save Time

Most importantly, this one precast gasketed storm sewer inlet saved the general contractor at least a week of time. A poured in-place structure would have taken one day to pour the base, then a second day to pour the walls. That is followed by three to four days of curing time before backfilling. In addition, the contractor would have needed at least one additional day to pour-in-place the lid that is tied to the walls with rebar. Overall, there were 69 precast concrete structures on this project, which saved the general contractor about 40 days of construction time.

Interestingly, it snowed the day after the inlet was installed and backfilled. Had this job been poured in-place, an additional week would have been wasted waiting for the snow to melt and re-digging the hole.

Cemcast Pipe and Precast is the only company in the region that produces gasketed storm sewer structures. Round manholes are good when pipe entries are not 90 degrees. Rectangular structures are ideal for structures with 90-degree entries. Manholes are more versatile than rectangular structures, but they are often much bigger. Rectangular structures are less versatile, but they take up much less space. Cemcast recommends gasketed inlets on all projects because it ensures a high-quality, watertight product, and saves construction time so that roadways can open more quickly.