There’s a lot to learn about Flexi-Pave and it’s diverse benefits and applications. We have taken the time to find and post news articles, studies, client write-ups, and other articles discussing our products and related issues. These informative news items will help you come up to speed not only on the Flexi-Pave products, but the practical construction and environmental challenges that these products were created to solve.

Mayor Vincent Gray pleased with Flexi-Pave Sidewalks

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On a recent visit to Eastern Market (7th St north of Pennsylvania Ave), Mayor Gray was so pleased about the installation of Flexi-Pave Sidewalks there that he Tweeted about it.

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State of Maryland Officially Approves Flexi-Pave for Statewide Use

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In October of 2013 the State of Maryland Department of General Services officially approved Flexi-Pave for statewide use. Flexi-Pave had already been in use throughout Maryland, but with the formal approval from the State more widespread use is expected. Several projects already installed in Maryland include:

  • Fitness trail at Lockheed Martin in Gaithersburg
  • Tree surrounds in Potomac
  • Sidewalks in Gaithersburg
  • Rooftop Dog Park in Wheaton
  • Rooftop Balconies in Wheaton
  • Playground Trail in Potomac
  • Park Trails in Silver Spring
  • Driveway Diffusion Strip in Damascus
  • Diffusion Strip in Glenwood
  • Pothole repairs in Glenwood
  • Driveway in Annapolis
  • Pool/shower/changing room in Annapolis
  • Wooden Bridge Overlay at Woodmore Country Club in Mitchellville
  • Sidewalk at Firestone store in Capital Heights
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    ANC 1B Approves Flexi-Pave Sidewalks & Tree Surrounds

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    Another ANC Commission approves the use of Flexi-Pave in their district.

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    DDOT Endorses Flexi-Pave for Citywide Use


    Washington DC is the latest municipality to adopt Flexi-Pave for use as Tree Surrounds and city Sidewalks. Starting in May 2013, Capitol Flexi-Pave entered into a multi-year contract with DDOT to replace failing tree surrounds and sidewalks throughout the city. But rather than just replace the tree grates or fill in the 4′x10′ tree pits with Flexi-Pave, UFA & DDOT decided to take it one step further and actually improve the microenvironment fo the district trees. This is being accomplished by enlarging the tree boxes to approximately 18′ wide and and deep as the current sidewalk is. After the failing concrete is removed, the soil is aerated with a Supersonic Air Knife and Soil Amendments are added to the soil. Then the flexible porous paving is installed flush with the existing sidewalks and paved up to the tree trunk so the soil will no longer be compacted by heavy pedestrian foot traffic, especially in areas near bus stops. Special installation techniques are used where the Flexi-Pave meets the buttress roots of the trees so that as the trunks continue to grow in diameter, the Flexi-Pave can self-adjust without girdling the tree.

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    Georgetown Tree Surrounds in the News

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    Wondering what the new tree surrounds in Georgetown were all about? Read the signs! Then read more about it in DC’s Neighborhood Blog PoPville.

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    Georgetown begins Flexi-Pave pilot program

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    Recognizing the challenge keeping trees alive while being trampled by thousands of pedestrians along narrow sidewalks to patronize the high end shops and restaurants in Georgetown, the Business Improvement District needed a solution. John Wiebenson & Johnathon Kass of the Georgetown BID consulted with DDOT officials and the Urban Forestry Administration’s director John Thomas and Urban Forester Joey Perez. They began exploring alternative solutions to meet both the pedestrian safety and tree preservation goals. Flexi-Pave quickly rose to the top of the list of options, so a pilot program on M Street Northwest was started in early 2013 to evaluate the effectiveness of installing Flexi-pave as a replacement for cast-iron tree grates and compacted dirt filled tree boxes. Initially 5 tree boxes were decompacted using the Supersonic Air Knife before being paved with the Flexible Porous Paving material Flexi-Pave which is made from recycled tires and an elastomeric binder so it will allow for continued tree growth without harming the trees as well as allow air and water to pass through to the critical root zone. Read more about it in this article from the Georgetowner.

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    Total Maximum Daily Loads – the 411

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    To alleviate the problem of eutrophication, EPA created the Clean Water Act to require states to adopt Total Maximum Daily Loads (TMDL) limits as the basis of their water quality improvement. Flexi-Pave has proven to be a cost effective solution for the removal of nutrients from storm water and reducing nutrient pollution. A long term water quality study conducted in 2010 by a Civil Engineering & Environmental Firm showed an amazing 83% reduction in nitrates and an 88% reduction in phosphates from contaminated water flowing through Flexi-Pave.

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    Eutrophication – the problem with the Bay

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    So what is eutrophication? H.W. Art, defined eutrophication as “The process by which a body of water acquires a high concentration of nutrients, especially phosphates and nitrates. These typically promote excessive growth of algae. As the algae die and decompose, high levels of organic matter and the decomposing organisms deplete the water of available oxygen, causing the death of other organisms, such as fish. Eutrophication is a natural, slow-aging process for a water body, but human activity greatly speeds up the process.”

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    Whats the deal with Phosphates & Nitrates?

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    The problem with runoff from impervious surfaces is that as water runs off these surfaces it collects contaminants and byproducts of vehicular traffic, agriculture, manufacturing, etc., such as nutrients, trace metals, oil and grease. These contaminants can include harmful elements such as nitrates and orthophosphates. These pollutants concentrate in storm drains and eventually make their way into bodies of water such as our Chesapeake Bay. Once there, the nitrates & orhthophosphates become food sources for algal blooms which are the first step in the eutrophication.

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    Chesapeake Bay at Risk of Slow Death

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    The Chesapeake Bay is at risk of becoming a large “dead zone” from contaminants in stormwater runoff.

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