Protecting the World’s Largest Geyser Ecosystem with Recycled Tires

October 17, 2017

October 17, 2017


Among the uses for recycled tires is pavement. Today’s NERC Blog article by Lauren Davis, Public Relations Coordinator at Michelin, talks about a recent project using recycled tires at Yellowstone National Park.


Yellowstone National Park has completed the second phase of its initiative to install more eco-friendly walkways in the world’s largest concentration of geysers and thermal features. With help from the Michelin Corporate Foundation, Yellowstone National Park has so far paved 11,100 square feet of pathway with the recycled material, replacing crumbling asphalt paths.


The new walkways are made from an innovative eco-friendly paving material that is manufactured in part from recycled tires. This new material will help reduce run-off and erosion in the eco-sensitive Yellowstone Geyser Basin, which features the iconic Old Faithful geyser and attracts millions of visitors a year.


The recycled tire pavement is called KBI Flexi®-Pave. This product provides a porous, durable and flexible surface that allows the water from rain and snow to percolate through the walkway the way it would have done before the walkways were installed. This in turn creates more natural water patterns that eventually replenish the geyser basin. Unlike asphalt, this paving material does not create significant storm-water runoff or leach pollutants into the soil. It also does not break apart, which prevents material from ending up in geysers and hot springs.


Some 2,400 tires were donated for the project, with this second phase using 1,536 end-of-life tires to help create thousands of square feet of paths. Most of these tires were originally donated several years ago by Michelin for use on Yellowstone’s more than 800 fleet vehicles and commercial equipment. A total of $1.5 million in donations and in-kind have been used thus far for the project. Around 1,500 volunteer hours have been logged on the pathway project.


Flexi-Pave not only provides an environmentally friendly solution for the Old Faithful area, it prevents thousands of old tires from ending up in a landfill or being burned for fuel. The project was made possible through a partnership between Yellowstone National Park, park concessioners, the Yellowstone Park Foundation, KBI Industries and the Michelin Corporate Foundation.


“The Yellowstone Walkways Project aligns with Michelin’s commitment to being a global leader in sustainable mobility,” said Leesa Owens, director of community relations for Michelin North America. “Our employees have been involved with this project from the start, working directly to help create environmentally friendly walkways out of Michelin tires that had already provided Yellowstone with years of cost-effective and fuel-efficient operations.”


Flexi-Pave is made of rubber granules and stone held together by a polymer binding agent that is inert when cured. Its open-pore design enables fast evacuation of up to 4,000 cubic inches of water per hour. Beyond Yellowstone, this innovative product has a broad range of applications. The thousands of rubber granules making up its surface make it non-slip and it is an ADA-compliant surface accessible to wheelchairs and walkers. The integrity of the materials are not affected by freeze-thaw conditions which is why it works well in cold and snowy parts of the Northeastern and Midwestern United States.


 “Yellowstone is the world's first national park with nearly 150 years of balancing the protection of natural wonders and sharing them with visitors,” said Lynn Chan, a landscape architect for the National Park Service and lead on sustainability at Yellowstone National Park. “It is important to us to rehabilitate the park’s walkways with materials that can help protect this sensitive environment yet still allow visitors to see and appreciate it.”


“This project represents the model for collaboration between public and private organizations. We hope that this eco-friendly park walkway will inspire other similar projects that help preserve natural systems,” said Jeff Augustin, vice president of external partnerships at Yellowstone Park Foundation.


By Lauren Davis, Public Relations Coordinator at Michelin


Dedicated to the improvement of sustainable mobility, Michelin designs, manufactures and sells tires for every type of vehicle, including airplanes, automobiles, bicycles, earthmovers, farm equipment, heavy-duty trucks and motorcycles. The company has earned a long-standing reputation for building innovative premium tires. In addition to tires, the company also publishes travel guides, hotel and restaurant guides, maps and road atlases. Headquartered in Greenville, S.C., Michelin North America employs about 22,700 and operates 19 major manufacturing plants.

Share Post

Commodity values further decline for Northeastern MRFs

By Waste Dive • December 9, 2025
MRFs in the Northeast United States reported a decrease in average prices for nearly all recycled commodities — with glass and bulky rigids providing the rare bright spot — during the third quarter of 2025, according to a report from the Northeast Recycling Council. This continues the downward trend reported in the region since Q2. In Q3, average blended commodity value without residuals was $75.14, a decrease of 21.9% from the previous quarter. When calculating the value with residuals, prices were $60.16, a decrease of 27.24%, says the quarterly MRF Commodity Values Survey Report. Single-stream MRFs saw values decrease sequentially by 23.32% without residuals and 28.86% with residuals. Dual-stream or source-separated MRFs saw decreases of 17.33% without residuals and 21.76% with residuals compared to last quarter. The report includes information from 19 MRFs representing 12 states: Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, and Virginia. The NERC report is meant to offer a regional look at price trends and is a part of the group’s ongoing work to promote and boost recycled commodity supply and demand in the Northeast. It surveys a variety of MRFs in numerous markets, including those in five states with beverage container deposit laws, which it says affect material flows into MRFs. NERC says its reports are not meant to be used as a price guide for MRF contracts because it “represents the diversity of operating conditions in these locations.” NERC adopted a new report format at the beginning of 2025 that now provides average prices for specific commodities in addition to aggregate values. According to the Q3 report, most commodity categories fell significantly, with the exception of glass and the “special case of bulky rigids.” The average price for bulky rigids in the quarter was $43.26, a 93% increase from the previous quarter. NERC did not offer insight into the increase. The average price for PET was $125.58 in the quarter, down 60%, while prices for Natural HDPE fetched about $955.31 a ton, down 46%. OCC saw an average price of about $86.23, down 10%, according to the report. Major publicly-traded waste companies echoed similar commodity trends during their Q3 earnings calls . Casella, which operates in the Northeast and mid-Atlantic, reported that its average recycled commodity revenue per ton was down 29% year over year in Q3. To reduce the impact from low commodity values, the company typically shares risk with customers by adjusting tip fees in down markets. Recent upgrades at a Connecticut MRF helped raise revenue for processing volumes in the quarter, executives said. Meanwhile, Republic Services is planning to build a polymer center for processing recycled plastic in Allentown, Pennsylvania, next year. During the Q3 earnings call in October, executives said they expect strong demand at such centers from both a pricing and volume standpoint, despite the decline in commodity prices. The company already has similar polymer centers in Indianapolis and Las Vegas, which consume curbside-collected plastics from Republic’s recycling centers and produce products such as clear, hot-wash PET flake and sorted bales of other plastics. Read on Waste Dive.

Northeast Commodity Values Continue Steep Decline in Q3 2025

By Megan Fontes • December 4, 2025
NERC’s Material Recovery Facilities (MRF) Commodity Values Survey Report for the period July - September 2025 showed a continued decline in the average commodity prices for Q3 2025. The average value of all commodities decreased by 21.90% without residuals to $75.14 and by 27.24% with residuals to $60.16, as compared to last quarter. Single stream decreased by 23.32% without residuals and 28.86% with residuals, while dual stream / source separated decreased by 17.33% without residuals and 21.76% with residuals compared to last quarter. Dual stream MRFs saw a slightly smaller decrease with residuals than single stream. Individual commodity price averages this quarter denote the decrease felt across all commodity categories apart from glass and the special case of bulky rigids.

Maryland Environmental Service

By Sophie Leone • November 17, 2025
Currently employing almost 800 individuals, Maryland Environmental Service (MES) was established by the Maryland General Assembly in 1970. The goal of its formation was to assist with the improvement, management, and preservation of the air, land, and water quality, natural resources, and to promote the welfare and health of the citizens in Maryland. Dedicated to helping Maryland communities, MES is currently working on over 1000 environmental projects across the state and the Mid-Atlantic Region. Tackling environmental solutions through environmental justice is of high priority, “in FY23 and FY24, MES supported the preparation, writing, and submission of grant applications totaling over 163M dollars, and provided letters of support for many others.” NERC is thrilled to welcome Maryland Environmental Service as members. The work they do toward environmental justice and the help they provide their communities is a testament to their dedication. We look forward to supporting the important work they do. For more information on Maryland Environmental Service visit .