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Stormwater management is quickly becoming the epicenter of many construction sites.  Whether it is a residential addition, a civil project, or a large infrastructure project for a DOT, handling water effectively is important.  From simply moving water away to capturing, filtering, treating and discharging, Terrain Civil is your partner in navigating these rapidly changing best management practices and requirements.

In an effort to fulfill these needs, we offer a full line of single wall, dual wall and triple wall HDPE and HP drainage pipe from the two major manufacturers, Timewell Drainage and ADS (Advanced Drainage Systems).  We are proud to offer both the MaXflo drainage pipe from Timewell as well as the N-12 drain tile from ADS.  Between the two manufacturers, we can cover any application from a gutter pipe or driveway culvert to an underground detention system.  From solid, perforated, sock and muck pipe to a modified French drain, retaining wall drainage, rain garden underdrain or a fabricated slotted drain – we can do it all. 


Terrain Civil also stocks HDPE pipe and fittings from 4” to 24” – you can’t find 24” plastic corrugated pipe or fittings on most pipe yards today, but you can at Terrain Civil.  We also offer pipe and fittings all the way to 60” in diameter by special order and can usually have anything you need in under one week.


Our goal is to serve our partner contractors better and faster, and with the confidence of our stocked inventory we are your essential drainage partner.  From downspouts and couplers to elbows and wyes, and yes - all the way to 24” are in stock.  Whether you need a ductile iron drop in grate from 6” to 24” or larger, a watertight Marmac coupler or rigid pipe adapter for dissimilar pipe, we have those in stock as well.  Give us a call and let us help you with your next project.

HDPE Corrugated Plastic Pipe & Fittings


Terrain Civil strives to be a resources in all of your projects,  whether it's simple or challenging.  Our most requested documents can be found here.  From product catalogs to submittal packets, installation guidelines and technical drawings.  If you can't find what you need, please give any of our knowledgeable staff a call at 615-649-8809 or reach out via email to and we will make sure your request is promptly addressed.

Product Catalogs


Single Wall Pipe Specs

AASHTO Dual Wall Pipe Specs

Small-ADS logo with Advanced Drainage Systems, Inc. Stacked - Color.jpg

ASTM Dual Wall Pipe Specs

Dual Wall Pipe Installation Guidelines

Dual Wall Pipe Fittings

ADS N-12 

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