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Makes Ponds Smaller!. Product Features. Buoyant flow control devices minimize storage volume in detention ponds in open drainage basins Two separate products: ER Series for flows greater than 6.5 cfs TD Series for flows up to 6.5 cfs Frictionless operation
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Product Features • Buoyant flow control devices minimize storage volume in detention ponds in open drainage basins • Two separate products: • ER Series for flows greater than 6.5 cfs • TD Series for flows up to 6.5 cfs • Frictionless operation • Corrosion resistant materials • Fits in FDOT standard inlet and J-boxes
Benefits and Advantages • Reduce stormwater pond size by up to 50% • Cost savings • Reduce excavation, construction, fencing, and mowing costs • Reduce import fill requirements • Maximize land usage • Minimize the size of underground vaults or chambers • Can be used in new pond constructionto reduce land acquisition and/or fill costs. • Can be used to retrofit existing ponds to create usable land and/or increase water quality volume in existing facilities
How Do The Devices Work? • Each product uses the principle of buoyancy to suspend a discharge control mechanism at a fixed depth below the water surface • Operates on constant head principle and provides nearly constant discharge independent of headwater depth
What is the ER Series? ER Series is a tube within a tube. Inner tube is buoyant Outer tube is stationary • Flow passes through the buoyant tube AND the annular space between the tubes. • Flow rate controlled by area at the opening to the buoyant tube AND area of annular space between buoyant and stationary tubes. • Tubes can have round or rectangular shaped cross sections • Flow rate calculated with weir and/or orifice equations.
What is the TD Series? • TD Series is a buoyant pvc module housing an orifice • Buoyant module is connected to an expanding conduit (“the bellows”) • Bellows fabricated from high strength, welded polyurethane with stainless steel reinforcing rings in each pleat • Bellows available up to 18” diameter (9.5 cfs max. discharge) • The “Duck” body rests in its “Nest” when it’s not floating • Uses standard Sch. 80 pvc flange to connect to outfall system • Fits in FDOT standard P-box or Type D inlet • Device is self-skimming. Water enters the module from its underside.
Are the devices approved? • SWFWMD has issued three (3) ERP's for Early Riser. • SJRWMD requests applicants schedule a pre-application conference prior to design (Mike Register, Kirby Green) • SFWMD has indicated it will permit the devices for governmental entities. Pre-application conference recommended. (Tony Waterhouse) • Pasco County has permitted Early Riser. • Washington State D.O.T., Cities of Olympia, Bellingham, Everett, Burlington, Ferndale, WA (and others) • Product presented to Rick Renna (FDOT State Drainage Engineer)
How can we help? • Three company principals are FL licensed, experienced drainage engineers. • Provide design details, hydraulic analysis and technical support • Assist with agency permitting and coordination • Live demonstration – Test station located in Oldsmar, FL • Basic data to get us started: • Pond Bottom Elevation • Water Quality Elevation • Proposed TOB/DHW Elevation • Allowable peak discharge rate • Tailwater Elevation
9400 River Crossing Blvd. Suite 102New Port Richey, FL 34655(727) 376-2400 telephone(727) 376-5973 facsimilewww.Thirsty-Duck.com Makes Ponds Smaller!