Due to the robust root system of most street trees, the design team was concerned that placing these trees in a typical biofiltration planter box would lead to the root system damaging the underdrain of the biofiltration system and clogging it, causing the planters to flood. Moore was to provide street trees within the right of way while also removing pollutants such as heavy metals, floatables, sediment and oil and grease from the roadway stormwater runoff before it outfalls to nearby Buffalo Bayou. One of the critical design goals of Design Workshop and Walter P. The primary feature that makes Bagby Street a Greenroads design is a series of biofiltration planter boxes that line both sides of Bagby street and collect stormwater runoff, storing it and filtering it through FocalPoint High Performance Modular Biofiltration systems (HPMBS). The Greenroads rating system was created at the University of Washington as a way to measure a roadway’s sustainability features similar to the way the United States Green Building Council’s LEED program measures the sustainability of buildings. Not only is Bagby aesthetically appealing, it is also environmentally friendly and is one of Texas’ first certified Greenroads. Landscaped planter boxes, paver sidewalks, and hardwood seating areas along the route are just a few of the additions that add to the pedestrian experience. The newly redeveloped Bagby Street in the Midtown District of Houston Texas will improve mobility for vehicles and pedestrians alike, while greatly adding to the aesthetic appeal of the roadway. Any deviation from the tested configuration, including the use of alternative inlet/outlet pipe angles, multiple inflow pipes, and/or grate inlets, will prevent the MTD from being awarded the certified TSS removal rate and may result in non-compliance with the Stormwater Runoff Quality Standard.Aesthetically appealing and environmentally friendly. It should be further noted that multiple inlet pipes and/or grate configurations have not been verified or certified. The certifications below for HDS MTDs are valid only when the proposed configuration of an MTD, including all internal components, is the same as the tested configuration and the MTD is installed with the same inlet/outlet pipe angles tested. The table below includes the listing of MTDs that are NJCAT verified and NJDEP certified under the updated procedures and protocols dated January 25, 2013. Further, the below ground device (vault) would need to meet the NJDEP BMP Manual conditions (see Appendix E) of having the soil below the MTD meet the minimum tested infiltration rate of one inch per hour, have at least two feet of separation from the seasonal high water table, and infiltrate into the subsoil. Any MTD with bio-filtration media that would be placed "below ground" as a vault without any vegetation can be considered GI (for NJ purposes) only if the device infiltrates stormwater into the subsoil. Specifically, the MTD shall (1) infiltrate into the subsoil and/or (2) treat stormwater runoff through filtration by vegetation or soil.Īn MTD that uses a bio-filtration media and can be configured "above ground" and incorporate a tree box, planter box, or shrubs, etc., would meet the GI definition. 7:8, the MTD must meet the GI definition noted at amended N.J.A.C. Green Infrastructure Guidance for MTDs (April 23, 2020)įor an MTD to be considered “green infrastructure” in accordance with the Maamendments to the Stormwater Management rules at N.J.A.C. Other state, federal and local requirements may apply. Please note that any MTD installed should be listed on the MS4 permittee’s inventory of stormwater management measures and must be properly maintained by the responsible party. 7:8), as a result of triggering the requirements for major development.įor projects receiving New Jersey Environmental Infrastructure Financing Program ( NJEIFP) funding, an MTD must be either: 1) NJCAT verified and NJDEP certified or 2) installed using the NJEIFP MTD Funding Policy.Īn MTD which is not NJCAT verified or NJDEP certified may be used as long as the MTD is not intended to satisfy the requirements of the Stormwater Management rule and is not subject to NJEIFP MTD Funding Policy. Stormwater Manufactured Treatment DevicesĪn MTD is required to be NJCAT verified and NJDEP certified when the MTD is used to satisfy the requirements of the Stormwater Management rule (N.J.A.C.
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