When it comes to designing extensive storm sewer conveyance systems, engineers and agencies are constantly seeking innovative alternatives to traditional reinforced box culverts. Contech, a leading player in drainage and stormwater, has been at the forefront of exploring efficient and effective solutions for moving stormwater across the country. While concrete has been the default choice for larger systems, there's a compelling alternative worth considering – Smooth Cor™.

A-2000™ PVC has been on the Florida Department of Transportation (FDOT) Optional Material for 100-year design life since 2003 and has been used for years in Florida and across the country as a direct equivalent to reinforced concrete pipe (RCP) in most storm sewer applications.

Contech Slotted Drain™ is used effectively to intercept storm water runoff from wide, flat areas such as parking lots, municipal streets, highways, and airport runways and taxiways. In these installations, the slotted drain is placed transverse to the direction of storm water flow or snow melt runoff. The open grate intercepts all the flow uniformly along the entire length of the drain.

One of the factors in determining the selection of a structure or structures to convey or store water is whether to use a single cell or multiple cell

I’ve recently been seeing engineers choosing what I feel are inappropriate Manning’s “n” coefficients for sewer design. Some choose too conservative values,