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CMP Detention and Infiltration

CMP Detention and InfiltrationMeet stormwater quantity and runoff reduction requirement

Our corrugated metal pipe (CMP) underground detention and infiltration systems can be sized and shaped to meet your site-specific needs. The versatile material provides almost limitless opportunities to match individual site while lowering site development costs.

Detention and Infiltration
Detention &
Infiltration
Detention

Contech CMP detention systems store stormwater runoff exceeding a site’s allowable discharge rate and release it slowly over time. Installed belowgrade, the systems maximize property usage and meet your specific water quantity requirements. CMP detention systems are available in all AASHTO M-36 Types.

Infiltration

CMP pipe and pipe-arch is available fully or partially perforated to meet your Low Impact Development (LID) requirements. Standard pipe-wall perforations (3/8” diameter holes meeting AASHTO M-36, Class 2) provide approximately 2.5% open area. Subsurface perforated CMP infiltration systems store stormwater runoff in the pipe and surrounding stone during a storm until it can be slowly released into the surrounding native soil.

Here's what CMP offers you:

Durability

  • Proven service life — Exceeds 100-years with proper specification that meets all AASHTO and ASTM pipe specifications
  • Handles fill heights in excess of 100 feet – steel gains strength from soil
  • 100% traceable material — maintains performance even when recycled
  • Homogenous material — eliminates failures due to stress cracks, shrinkage cracks and air voids
  • Various coatings available with predictable service life

Versatility

  • Wide range of shapes and sizes – round and pipe-arch in diameters from 6 to 144 inches
  • Variety of layouts – rectangular, L-shape and staggered cells are frequently used
  • Array of fittings – tees, wyes, elbow, saddle branches, manifolds, reducers and custom fabrication available

Sustainability

  • World’s most recycled content – can count towards LEED® credits
  • Requires less energy and materials to produce – lowers carbon footprint

Easy Installation and Maintenance

  • Flexible and forgiving during installation
  • Lightweight for easy handling
  • Quick assembly shortens site development time
  • Integrated outlet control structure eliminates need for downstream control structure
  • Manhole riser sections, complete with ladders facilitate any access and scheduled maintenance

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CMP Subsurface Infiltration Systems

CMP InfiltrationCMP and pipe arch is available fully or partially perforated to meet your Low Impact Development (LID) requirements. Standard pipe-wall perforations provide approximately 2.5% open area. CMP infiltration systems retain runoff in the pipe and surrounding stone until it can be slowly released into the surrounding native soil.


CMP Stormwater Detention Systems

CMP DetentionFlexible configurations and pipe coatings are adaptable to site-specific footprints and conditions. CMP detention systems store stormwater exceeding a site's allowable discharge rate and release it slowing over time. Installed belowgrade, the systems maximize property usage and meet your specific water quantity requirements. CMP detention systems are available in all AASHTO M-36 Types.


CMP for High Volume Applications

CMP Plate Detention and InfiltrationCMP plate systems allow for high volume stormwater storage in small footprint areas. The systems are offered in a wide variety of shapes and sizes in both aluminum and galvanized steel. Full-pipe systems and three-sided structures with open bottoms can be used for infiltration.


CMP for Low Profile Applications

CMP InfiltrationWhen vertical space must be maximized, the CMP can be utilized in a pipe-arch shape. The low, wide pipe-arch design allows for greater storage in a shallow profile than typical round pipe without losing any structural integrity. Like our round pipe, pipe arch is produced in six wall thicknesses including 18, 16, 14, 12, 10 and 8 gage, which are available with either helical or annular corrugations.


CMP Infiltration Wells for Runoff Reduction

CMP InfiltrationMeet LID requirements and eliminate the need for the extended detention basin. First, collect the site runoff using Slotted Drain™, which directs water into vertical lengths of perforated CMP. The vertical perforated CMP is long enough to penetrate a clay layer (if present) and infiltrate the stormwater into a highly permeable alluvial layer about 12’-14’ belowground.


Bioretention with Perforated CMP

CMP BioretentionMake bioretention practical for sites with marginal soils by installing perforated CMP. Pipe networks can be configured to meet any size facility. Allows you to reduce the footprint and depth of the bioretention cells.


Underground Metal (UGM) Cistern for Rainwater Harvesting

UrbanGreen Rainwater Harvesting - Underground Metal Cistern Underground metal systems are highly adaptable for large sites.  Systems can be scaled to any size.

Re-use captured stormwater on site for irrigation or other application.


Aboveground Metal (AGM) Cistern for Rainwater Harvesting

UrbanGreen Rainwater Harvesting - Aboveground Metal CisternAboveground Metal Cisterns can provide bulk storage in a small footprint. Versatile sizing with diameters to 16 ft. and heights to 25 ft. tall.

Re-use water for toilet flushing or other application.

 

SS Credit 5.1 – Site Development, Protect or Restore Habitat, 1 Point

Intent – Conserve existing natural areas and restore damaged areas to provide habitat and promote biodiversity.

Potential contribution: Stormwater Detention and Infiltration Systems
  • Store, recharge and infiltrate stormwater belowgrade
  • Provide additional opportunity for green space

SS Credit 6.1 – Stormwater Quantity Control, 1 Point

Intent – Limit disruption of natural hydrology by reducing impervious cover, increasing on-site infiltration, reducing or eliminating pollution from stormwater runoff and eliminating contaminants.

Potential contribution: CONTECH Detention Systems
  • Reduce post-development peak discharge rates

Potential contribution: CONTECH Infiltration Systems
  • Keep water on the site
  • Recharge groundwater

WE Credit 1 – Water Efficient Landscaping, 2-4 Points

Intent – Limit or eliminate the use of potable water or other natural surface or subsurface water resources available on or near the project site for landscape irrigation. Reduce by 50% (2 points) or eliminate (4 points).

 


Potential contribution: CONTECH Detention Systems
  • Create water efficient landscaping by harvesting rainwater for re-use
  • Store water belowgrade or above ground using pipe or structures

WE Credit 3 – Water Efficiency, 2-4 Points

Intent – Further increase water efficiency within buildings to reduce the burden on municipal water supply and wastewater systems. Reduce by 30% (2 points), reduce by 35% (3 points) or reduce by 40% (4 points).

Potential contribution: Contech Stormwater Treatment and Detention Systems
  • Pretreat rainwater for applications such as toilet flushing.

MR Credit 4 – Recycled Content, 1-2 Points

Intent – Increase the demand for building products that incorporate recycled content materials. The sum of post-consumer recycled content plus one-half of the pre-consumer content constitutes at least 10% (1 point) or 20% (2 points), based on cost, of the total value of the materials in the project.

Potential Contribution: Contech Metal Pipe and Structures
  • Steel is the most recycled material in the world
  • Up to 80% recycled content


RP Credit 1 - Regional Priority

Intent - Provide an incentive for the achievement of credits that address geographically-specific environmental priorities.

 

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