Calculations are based Upon a 6” (150 mm) Stone Base Under Chambers. 1 are for detention ponds. Explore Our Products. . Sewer and Drain and Schedule 40 Pipes; knockout points stay securely in place if not neededincrease detention time. There is increasing evidence that salt application to roads and parking lots in winter is driving a rise in chloride concentrations in streams in the northeastern United States. Thousands of new, high-quality pictures added every day. 5. Now you can meet the land-use requirements and overall budgets of your projects by utilizing the most cost-effective subsurface detention/retention system. . The primary objectives of the City’s stormwater detention requirements are described below: Post-project peak flow rates must match pre-project conditions - Onsite detention facilities must be designed so that peak flow rates for. Stormwater ponds are designed to act as flow-through systems. Rainstore 3 is a modular, stackable, underground water containment system. PVC pipe offers excellent resistance to conventional corrosion and abrasion. SC-740 StormTech Chamber Submittal Package. Our underground detention systems offer you flexibility and customization for either detention or infiltration applications – metal, concrete, and plastic systems are available. The MC-3500 and MC-4500 chambers help properly manage your rainwater. ADS tightline. 2 inch rainfall event (and the stormwater runoff generated by the first 1. Maximize infiltration area with StormTech retention systems Advanced Drainage Systems (ADS) is the world's largest stormwater solutions company. 338 pages, Hardcover. It's quick and easy to connect with a representative. The product can also integrate treatment and rainwater harvesting options in addition to functioning. The Ripple Effect. Many agencies do not allow the use of this water-quality volume in the detention analysis, even when it is in the same basin. In this article, we will discuss the proper installation of ADS chambers, specifically the MC 3500 and 4500 models. Stored water is then released directly through. , 3rd Floor Tucson, AZ 85701-1791 (520) 724-4600 November 2015By definition, a detention BMP is an area where stormwater is temporarily stored, or detained, and is eventually allowed to drain slowly when water levels recede in the receiving channel. As new development often converts a forest canopy to impermeable asphalt and rooftop, it is not fair to push the increased runoff into existing streams and rivers. Landmark crews working to install an ADS stormwater detention system at the Charleston County Social Services Hub project in North Charleston!The Cascade Separator is the newest innovation in stormwater treatment from Contech. We’ve got all the right pieces. 22. Dawoud Al Hajri, director general of Dubai Municipality, visited the site on Monday. In fact, there are so. This satisfied the site's required stormwater detention while adding the additional benefits of a vegetated roof, which include reducing. 01 m3;R-Tank® Stormwater Modules provide both an efficient and versatile underground stormwater storage system. PIPE-R™ is constructed of 100% Recycled Plastic and is fast and easy to install. Horizontal/Directional Drilling. They are used as water features in neighborhoods and. Stormwater flow controls are non-mechanical devices used to control stormwater flows entering or exiting stormwater treatment or detention systems to a designed rate, such as the water quality flow rate. One of my favorite summer activities is floating in the water and looking up to the sky. Water Management Solutions. The new Georgia Stormwater manual gives full water quality treatment credit if you can show the first 1” of rain being retained and infiltrated. The StormTech Design Tool allows for a quickly designed, custom-tailored, underground stormwater management system that can be immediately utilized in project documents. Storm Water Solutions. Basins and Trench Drains. 1. Supplement your stormwater pollution prevention plan (SWPPP). , 2017). . As a division of ATS, ADS is a leading supplier of chambers for stormwater management. Underground Detention. StormFilter Features and Benefits. Detention / Infiltration. MSD is two utilities in one—providing collection and treatment of wastewater generated by residential, commercial, and industrial activities, while also responsible for operation and maintenance of the separate storm sewer systems that serve approximately 90% of St. Increasingly stringent regulations and escalating land values require developers to take extra care in managing stormwater runoff. In case the ownership of the detention device Transfers, the current owner shall, within thirty (30)Can be used independently or as part of a larger system to collect and detain stormwater, allowing for groundwater recharge. As flat as Harris County is, most of our stormwater storage has to be excavated. Other specific products include a panel-shaped drain pipe, catch basins, inlet filters, stormwater separators, geotextiles, lateral connections, detention/infiltration systems, geotextiles, and on-site septic systems. ADS StormTech products, manufactured in accordance with ASTM F2418 or ASTMF2922, comply with all requirements in the Build America, Buy America (BABA) Act. (ADS). Long service life thanks to inert HDPE and polypropylene materials. Pipe. 1 Regulatory Overview ; 1. 50-1. Other specific products include a panel-shaped drain pipe, catch basins, inlet filters, stormwater separators, geotextiles, lateral connections, detention/infiltration systems,. Summary of Recent Manual Changes - Changes from the 2016 Code to the 2021 Code. Keep your underground stormwater detention, infiltration, and cistern systems working properly with regular inspections and required maintenance. A tank manufactured to handle such substances as water, sewage, farm effluent, petroleum products and chemicals. Benefit. ADS StormTech chambers reduce the overall installed costs of underground detention systems. Wet Detention. CALL US 888-825-4716. Dimensions: 24″ L x 12″ W x 3. CALL US 888-825-4716 HomeAPPENDIX III-B Stormwater Detention Calculation Forms (10 year and 100-year) TOC Page 3 . COM 800. The chambers have a 75-year design. Stormwater Separator systems use the physics of flowing water to remove a variety of pollutants and are characterized by an internal structure that either creates a swirling vortex or plunges the water into the main sump. Its modular design allows for quick and. AtlanFlow ADS Pipe. Buried 25 feet. 1. Assumes 40% Stone Porosity. There is even a specially perforated pipe series for grain aeration. Supporting every aspect of your project, our extensive network of. Basins are meant to collect stormwater and slowly release it at a controlled rate so that downstream areas are not flooded or eroded. Careers. ADS 3D Design Tool: Barracuda Login or Create an Account My ADS Design Tool Account BayFilter 3D Design Tool. 2 SCOPE This manual presents various applications of accepted principles of surface drainageA guide for water sensitive urban design: Stormwater management for small-scale development Page 6 1 Design and performance criteria Urban stormwater design has traditionally focused on peak flow management only, however, design standards have evolved and now require stormwater design to consider the changes in catchment. Stormwater Flow Controls. Made From 100% Recycled Plastic. LIDs, including detention pond, detention basins, and wetlands are centralized measures that treat stormwater runoff at the end of a catchment or drainage area 24, whereas green roofs, bioswales. View the StormTech Video Library. They found that the capability. Today, over 10 billion feet of ADS pipe is in service around the world making us a leader in water management solutions. When space is abundant, the most common approach to stormwater retention/detention systems is to design above ground storage ponds. Isolator Row PLUS chamber and fabric provides enhanced suspended solids and pollutant removal while providing surface area for infiltration and runoff reduction. Detention / Infiltration Stormtech SC160 The StormTech SC-160LP Chamber was developed for infiltration and detention in shallow cover applications. Detention Basins 0. The volume of the system was 65,000 cu. This allows StormTech chambers to be easily used within any HydroCAD model for stormwater storage, detention, or infiltration. In this study, dry samples of float deposits were collected from the screens in detention basins, and they were analyzed in the soil laboratory to construct the gradation curves. PVC pipe offers excellent resistance to conventional corrosion and abrasion. The Cascade Separator was developed by Contech’s stormwater experts using advanced modeling tools and Contech’s industry leading stormwater laboratory. This specification describes LandMax Retention/Detention Pipe Systems for use in non-pressure gravity- flow storm water collection systems utilizing a continuous outfall. Designed by a Landscape Architect for both subsurface detention basins and retention/harvesting. 15. Showing 8 Products. The coastal counties alone have over 9,200 stormwater ponds, and the number continues to rise. ADS PipeDuroMaxx can be made watertight, and can be used in applications with corrosive soils or abrasive flows. Even where detention ponds are not necessary for flood control, water quality ponds can be used to address water quality and stream stability concerns. These projects include the replacement of failed pipes and. 8. For some, like me, floating can be relaxing, but for others, floating brings an uneasiness. Green roofs. The Jellyfish Filter is a stormwater quality treatment technology featuring high flow pretreatment and membrane filtration in a compact stand-alone system. Effective stormwater management is critical in urban areas due to space limitation (Dhakal and Chevalier, 2017; National Research Council, 2009; Yan et al. However, many of the criteria also apply to infiltration ponds (Section 5. 5 billion 2018 bond for flood mitigation, the. The StormTech Isolator Row PLUS is a row of StormTech chambers with a flared end ramp (flamp) that sits on top of one layer of ADS PLUS fabric. The term encompasses proprietary devices, as well as more traditional designs such as above-ground retention ponds or riparian areas. Also. Detention / Infiltration Stormtech SC160 The StormTech SC-160LP Chamber was developed for infiltration and detention in shallow cover applications. Pipe. Create an account and you can see how the Triton Stormwater Solutions Stormwater Chamber System compares with ADS-Stormtech's SC-310, SC-740 and MC3500, Contech and. There are many ways that you can detain stormwater on. One of my favorite summer activities is floating in the water and looking up to the sky. A retention/detention system should be inspected at a minimum of one time a year or after major rain events if necessary. Hilliard, Ohio 43026. Meeting FAA D701 and D705 Requirements. 1-800-821-6710. These stormwater BMPs boast the ability to manage detention, conveyance, and retention on all subsurface. Our stormwater capture products offer our customers quick and easy installation, extended service life, and easy maintenance compared to traditional stormwater structure products. 1-800-821-6710. Underground detention is ideal for use under paved areas such as parking lots. DuroMaxx is available in diameters ranging from 30 to 120 inches and in lengths up to 48 feet. A deepwater drainage tunnel to help Dubai manage stormwater and tackle the threat of flooding is in its final pre-operational stage. It covers the regulatory framework, technical standards, best practices, and case studies for reducing stormwater runoff and improving water quality. All ground-up developments that you tackle will need to address stormwater runoff in some way. 0 ratings0 reviews. Benefit. Stormwater detention and infiltration is achieved by the type of foundation on which the pieces are set. It was found that D90=0. StormTrap offers the industry’s best solutions for managing runoff, protecting waterways and improving the use of your property. Homeowners, builders and contractors rely on us to keep houses and neighborhoods free from flooding. This approach therefore aims to protect urban waterway health and also to consider storm water as a fit-for purpose water supply source. The volume of excavation will vary as depth of cover increases. This property and sub-surface storm water detention device are also subject to the Operations and Maintenance Manual filed in relation to this project. Used in congruence with SedimenTrap, StormChamber ensures that the water regulated is cleansed of floodwater pollutants that could potentially harm the local ecology as it’s pumped back into surrounding streams, wetlands, and lakes. Drainage Handbook; New! Sustainability Report 2023; Water Management Catalog; Careers; The Ripple Effect; Find a Rep; 1-800-821-6710;. Molded from high density polyethylene (HDPE) for light weight and sturdy design, Envirohood's corrugated design eliminates flat surfaces and provides increased structural capacity. Larger diameter pipe provides increased storage volume in a smaller footprint, while long. Dry detention ponds have been widely implemented in U. - Properly installed storm tech chamber system can save land and protect water. SC-740 StormTech Technical Specification. 75″ H. The ADS Design Studio has a variety of design tools to help you plan your next stormwater management system. Our portfolio includes bridges, drainage, erosion control, retaining wall, sanitary sewer, and stormwater management products. Connect to 4 in. Bush at the Texas General Land Office enjoining his support for federal monies to build a detention basin on the 171. Stormwater flow controls are non-mechanical devices used to control stormwater flows entering or exiting stormwater treatment or detention systems to a designed rate, such as the water quality flow rate. Multiple cartridge heights. Basins and Trench Drains. 2. 4 Minimum Stormwater Management Standards ; 1. Start a Project. In contrast, detention tanks are underground storage facilities typically constructed with large diameter metal or plastic pipe. Chamber size ranges from 15 cubic feet of minimum installed storage to 162. As new development often converts a forest canopy to impermeable asphalt and rooftop, it is not fair to push the increased runoff into existing streams and rivers. Size (L x W x H) 85. Key Terms: In this video, Michael walks us step by step through the installation of an ADS StormTech underground detention system. What Is Underground Detention 2 Underground Detention Responsibility 2 Underground Detention Design & Installation 3 Confined Space Entry 3 Glossary 4 Inspection Checklist 4 TABLE OF CONTENTS This guide was prepared by the Stormwater Division of the City of Springfield’s Environmental Services Department. We have different options to fit your property type or constraints. e Nat . Armando Walle helped to secure funding during the recent legislative session, will be able to hold. The Aquabox system is designed primarily to be used under parking lots, thus maximizing land usage for private (commercial) and public applications. Chris Strawn and Tom Jansen. The Barracuda 3D Design Tool is here to assist in designing a site-specific configuration of the Barracuda Hydrodynamic Separator. Please reference ADS Standard Detail 702 “Retention-Detention System (Cross-Section)” for cover height recommendations. Interceptor Trenches. 2002) to mitigate the impacts of urban runoff on receiving water bodies. Advanced Drainage Systems, the world's largest stormwater solution provider, has a division called ATS which is a leading supplier of chambers for storm water management. Both innovative and cost-effective, StormTech is one of the most revolutionary stormwater products in the world. The Flood Control District uses stormwater detention extensively to reduce the risk of flooding throughout the county. But a detention pond holds water permanently, while a retention pond is normally dry, except when it rains, then it fills up with water. By combining the modular system and a back fill of #57 stone, we were able to meet the full detention requirement for the site. Please visit colorado811. Stormwater Hot Spots . Feature. Stormwater is drawn evenly through the filter media providing efficient, effective stormwater treatment. These detention systems also may include filters to remove sediment and debris before the water enters the system. Created in August 2021 CONTACTS 1. The basin will provide 1,000-1,700 acre-feet in storage. Stormwater POND, Detention Ponds,. Made from high–density polyethylene N–12® drainage pipe, these units are resistant to abrasives and chemicals typically found in storm water and surrounding soils. 24” diameter x 28. As noted above, dry detention ponds were common stormwater controls in the past but have become less popular given their limited ability to address water qualityContech Solutions. 4” x 51” x 30” 2,170 mm x 1,295 mm x 762 mm. Stormwater Program. where Q is the flow in cubic feet per second, A is the inside area of the orifice in square feet, g is the gravitational constant (32. DuroMaxx detention and infiltration systems can be designed with gasketed bell and spigot joints or welded coupler joints for increased water tight reliability. CALL US 888-825-4716 HomeEnvirohood is an innovative stormwater management device attached to the inside of a catch basin or manhole designed to prevent the outflow of floating debris and oil. The compound spiral media configuration allows for a large filter surface area in a compact footprint. Storm- water retention or detention ponds often areThe Stormwater Utility, currently provides public drainage services for approximately 27,000 properties and extends approximately 257 square miles (164,480 acres). 4. SC-160LP Chamber and End Cap sanitary sewer standards. The use of these devices is an integral part of any stormwater management system. We are working diligently to resolve this matter. Properly manage storm water with the chamber system from StormTech (a division of ADS). Call 1 (866) 888-8479. Detention systems are made to prevent that flooding. We are working diligently to resolve this matter. Various stormwater best management practices (BMPs) have shifted towards the reliance on green infrastructures (GIs) and low-impact developments (Jeon et al. The riser will typically be 24” in diameter or larger. The flamp allows for easier cleaning and. Stormwater Management. SingleTrap can incorporate rainwater harvesting and treatment options as well as function within a treatment train for a more complete water quality. - Storm water enters through an open catch basin. 8 hours ago · “The conceptual plan depicts the proposed layout as solar panels, access roads, stormwater detention facilities, landscaping buffers, and related improvements on the subject property relative to the existing land cover and surrounding uses,” Bateman said. Dry detention basins. R-Tank is a proven modular subsurface detention system that serves as an efficient alternative to traditional stormwater basins. An industry leader of high performing, durable pipe built to provide you with innovative stormwater management solutions. Agriculture. CMP Detention and Infiltration; ChamberMaxx Plastic Chambers; UrbanPond Concrete Detention; DuroMaxx SRPE Detention; Go Big - Large Scale Stormwater Management; Hydrodynamic Separation. Advanced Drainage Systems Inc. StormTrap underground stormwater detention systems manage and control the volume and discharge timing of stormwater runoff. DuroMaxx is available in diameters ranging from 30. The open bottom chambers and perforated sidewalls (SC-310, SC- 310-3 and SC-740 models) allow stormwater to flow both vertically and horizontally out of the chambers. What are other Engineers doing for stormwater detention on relatively flat sites? I have a 40 acre residential subdivision in the works. CMP Detention and Infiltration; ChamberMaxx Plastic Chambers; UrbanPond Concrete Detention; DuroMaxx SRPE Detention; Go Big - Large Scale Stormwater Management; Hydrodynamic Separation. Green Roof – A green roof is vegetation growing on a contained roof space. “What would’ve been one or two ponds in this setting, is now useable land. 701 Retention-Detention System (Plan View) Detail. 1. 5 ft3 | 3. Variations include wet extended detention, micropool extended detention, and multipleAgricultural Stormwater Detention Areas (ADAs) commonly exist for the purpose of downstream flood protection in high water table regions of Florida. One Stop. View the StormTech Video Library. week-long conference on stormwater detention facil ities planning, design, operation, and maintenance. ADS Technical Note 2. Floodplain and Erosion Hazard Management Ordinance . They are often made of high-density, polyethylene infiltration chambers, but there are many material variations in use. Pipe Requirements Retention/Detention systems may utilize any of the various pipe products below: Engineered for the if, ready for the when. stormwater detention pond, or there's one down the street in the neighborhood park. qit-Stormwater-qit is a comprehensive source of detention techniques and management practices for the management of stormwater discharges and combined sewer overflows (CSOS). State of Florida regulations currently (1996) require retention or detention with filtration of the runoff from the first inch of rainfall (Florida Depart ment of Environmental Protection, 1993). Your office complex may have a detention pond or two on its property. Connect to 4 in. The system is designed for surface water detention, retention, infiltration and reuse. READY TO ORDER. It was replaced with concrete pipe. TrashRacks. With TRUEGRID plastic grid pavers filled with gravel on a rock sub-base, rain drains virtually instantly- over 800 inches per hour. In the decades since, people living in the area have complained that radioactive materials at the site have contaminated the air and local water supplies, and. Find the specifications, installation guides, approvals & other ADS drainage engineering resources you need by searching our Resources database. Wrap PIPE-R™ cubes with an. *Assumes a minimum of 12” (300 mm) of stone above, 9” (230 mm) of stone below chambers, 9” (230 mm) of stone between chambers/end caps and 40% stone porosity. Custom trash racks may be fabricated to meet project-specific requirements. 2), and water quality wetponds and combined detention/wetponds (Section 6. Detention ponds are de ned as stormwater management structures that are best practice to collect runoff, reduce ow to provide ood protection, and improve water quality (US EPA, 2018). The system is designed to make the best use of land while addressing rainwater mitigation, making it a critical step in site development. StormChamber is a stormwater systems solution that functions in all environments. The compound spiral media configuration allows for a large filter surface area in a compact footprint. 2021 Full Stormwater Manual - Volumes 1-5 and Appendices Directors' Rules SDCI 10-2021/SPU DWW 200. Estimates of runoff volume and frequency are based on local soil, topographic and climate data, and user-provided land cover and BMP data. Stormwater management considerations are a vital part of the site selection and development process – and can impact the long-term value of a property. (ADS) has acquired the remaining 50% interest in StormTech LLC. Download our cost comparison sheet. R-Tank® detention/retention and infiltration systems are among the most efficient systems available to provide underground storage for stormwater runoff. These detention and retention tank systems can be installed quickly. Stormwater retention/detention systems vary widely in design, from openStorm water detention facilities are not allowed in the floodway unless permitted by the Illinois Department of Transportation, Department of Water Resources. 1. Detention and Infiltration. The design of a detention tank includes specially engineered valves that help gradually release time over time. The. Although the vast majority of StormTech systems are unlined detention systems, by incorporating a continuous membrane liner, StormTech chambers can be effectively used for separation applications. Flexibility to meet site-specific hydraulic needs and reduce system size and costs. StormTech Lunch & Learns. Properly manage your rainwater with the chamber system from StormTech (a division of ADS). Find Stormwater Detention Pond stock images in HD and millions of other royalty-free stock photos, 3D objects, illustrations and vectors in the Shutterstock collection. Several simulation. 2) Remove the lid from the riser. ACO. easily incorporated on sites where a stormwater pond is to be constructed to control poten-tial flooding. ABT Permavoid is a modular interlocking plastic system designed for use as a combined drainage component and sub-base replacement. org or call 811 directly to have your utilities marked. 75 high. 8 | Design guidelines for on-site stormwater de tention Ci. The generally accepted number has been 40% stone void. Corporate Office Advanced Drainage Systems 4640 Trueman Blvd. Introducing our newest solution for managing stormwater intake is engineered for high performance and maximum flexibility. Worth, Denver International, and Atlanta Hartsfield, along with regional airports, use ADS HDPE pipe for under drains, cross drains, edge drains and culverts. On-site, underground stormwater retention /detention accomplishes the capture and storage of stormwater collected from surrounding impervious areas. The Barracuda is market-changing, stormwater quality technology. To succeed in this rapidly changing environment, you need a partner to help you navigate the complexities of local regulations – someone who is responsive to your requests, saves your customers money and. Underground detention is ideal for use under paved areas such as parking lots. The open bottom chambers and perforated sidewalls (SC-310, SC- 310-3 and SC-740 models) allow stormwater to flow both vertically and horizontally out of the chambers. 15,000 cubic feet. 2 inches of all larger rainfall events). TankStor. Our detention solutions temporarily store runoff in large underground precast concrete chambers before releasing it at a controlled rate. Stormwater detention basins are a place to store potentially damaging floodwaters temporarily until the channels can safely carry the water away. It couples advanced polypropylene resin technology with a proven, dual wall profile design for superior performance and durability. DoubleTrap is easily maintained, innovative and cost-effective. Our stormwater capture products offer our customers quick and easy installation, extended service life, and easy maintenance compared to traditional stormwater structure products. Staunton, a division of ATS, is a leading supplier of stormwater chambers. SC-740 StormTech Technical Specification. The Ripple Effect. We provide stormwater best management practices (BMPs) such as retention, detention, and conveyance to maintain water quality for reuse in homes and buildings. 1-800-821-6710. This incorporates the site layout with various details such as the Isolator Row Plus detail, the inspection port detail,. For these types of applications Stormwater Modeling - Since 1986. With a footprint identical to the SC-740 chamber, the DC-780's stiffening ribs reinforce the chamber structure allowing for a maximum burial depth of 12 feet. Find it in stock near you with parts available for same-day construction. 31 60. In fact, the majority of land development projects over one acre require a stormwater. Learn more about our Nyloplast products and start a project here. Our portfolio includes bridges, drainage, erosion control, retaining wall, sanitary sewer, and stormwater management products. Flo-Well® Engineered Dry Well. It's quick and easy to connect with a representative. Properly manage your rainwater with the chamber system from StormTech (a division of ADS). A common conventional method for managing stormwater is a stormwater basin. In this manner, detention basins may be eliminated or significantly reduced in size. 9. ·contact ads engineering services if inserta tee inlet must be raised as not all inverts are possible. R-Tank® detention/retention and infiltration systems are among the most efficient systems available to provide underground storage for stormwater runoff. Flo-Well® Accessories. Jellyfish removes floatables, trash, oil, debris, TSS, fine silt-sized particles, and a high percentage of particulate-bound pollutants; including phosphorus, nitrogen, metals and. The developer is almost finished addressing stormwater detention on the site, Czerwinski said. CDS captures and retains 100% of floatables and neutrally buoyant debris 4. Polyvinyl Chloride (PVC) Pipe. Oftentimes detention will be required. Photo curtesy WA DOE. Increasing runoff floods downstream properties and. Our interactive design tool allows you to plan a project quickly and efficiently. The design criteria in Section 5. Hydraulics & hydrology. For the most part, planning and design have focused on protecting only the site being. 6 underdrain detail a a b b section a-a section b-b number and size of underdrains per site design engineer 4" (100 mm) typ for sc-310 & sc-160lp systems 6" (150 mm) typ for sc-740, dc-780, mc-3500, mc-4500 & mc-7200 systems outlet manifold. Moreover, the inclusion of the In-Situ Storm Tech and Advanced Drainage System (ADS) Stormwater Detention System underscores the commitment to harmonize industrial advancement with environmental considerations. The SciCloneX is manufactured from high-density polyethylene components which are non-corrosive and extremely durable. SC-740 StormTech Isolator Row Plus Profile. Call 1 (866) 888-8479. Connect with Bishop Mays Inc:The Rainwater and Land Development manual defines Ohio's standards and specifications for stormwater management practices implemented during land development. 205. View Product. A flood control detention basin temporarily stores excess storm runoff and then discharges it at a rate not to exceed the downstream channel capacity (see Fig. 13 Manholes Page 15 4. is the manufacturer of CULTEC Contactor® and Recharger® Plastic Stormwater Detention/Retention Chambers,. Chapter 2 - Stormwater Section 2G-1 - General Information for Detention Practices 3 Revised: 2014 Edition 1) General: The major storm drainage system should be designed to reduce the risk of substantial damage to the primary structure from storm runoff expected from the major storm. These basins are not large permanent pools of water, but may have small pools at the inlet or outlet. Please refer to the Corrugated. We are currently experiencing an issue where some projects get stuck in “pending” when a user requests drawings and reports. GreenBlue Urban stormwater storage modules are the strongest large underground modules, while providing the most void space for stormwater storage on the market (at over 97%), allowing you to reduce excavation costs while maximizing storage. One acre-foot holds 325,851 gallons. Please contact Construction EcoServices Systems Department for your detention needs.