Contech’s corrugated metal pipe’s (CMP) stormwater detention and infiltration systems store stormwater exceeding a site’s allowable discharge rate and release it slowly over time. Systems can be sized and shaped to meet site-specific needs, and are available fully or partially perforated. CMP detention and infiltration systems are available in all AASHTO M-36 types, with various coatings to achieve 75-100 year design service life.