< Back Depot on Main Apartments (Zimmerman, MN) Underground stormwater system for 65-unit apartment Year Completed: 2019 Previous Next

PARKING LOTS TDA has been used in parking lots for both s tormwater management and site stabilization. ​ Stormwater : Many companies put their stormwater retention systems under the parking because it has a dual purpose. It is a smart way to utilize the real estate space and manage your stormwater runoff. This method also makes for a very sturdy parking lot. ​ Common underground stormwater management methods include using chambers, vaults, clear stone or a combination of those methods. To keep costs down, utilizing the 50% void space of TDA can hold and retain the stormwater runoff in a basin. ​ Site stabilization: Existing lands can be made up of soft, muddy soil at low-lying grades. These properties need a stable foundation that can be trusted to hold up overlying structures. Using a lift of TDA placed directly on the existing grade creates a strong foundation and eliminates the risk of differential settlement or other failures. ​ The high permeability and thermal insulation properties of TDA help create a capillary break, so moisture can’t wick its way towards the surface (no more cracking or buckling during spring thaw!). In fact, TDA has about 8 times better thermal insulation than soil! SEE PROJECTS

< Back Nompeng Academy Unexpected peat deposit Year Completed: 2018 Ed Stec with JV Vang Construction was working on Nompeng Academy’s expansion and a new parking lot that was earmarked for the open field next to the stormwater pond. When the construction crew ran into an unexpected peat deposit located where the parking lot was to be built, Curt Johnson with Northern Technologies, LLC recommended that rather than incurring the cost of excavating and replacing the deep peat layer with off-site conventional soil, they would instead float the parking lot over with lightweight fill. The two lightweight materials evaluated were a two-foot layer of TDA (tire-derived aggregate) or polystyrene (geofoam). When looking at the cost and ease of placement, TDA was faster to install and was less than 1/10 the cost of the alternative lightweight fill solution. TDA’s lightweight property helps prevent the parking lot from sinking into the peat and will also provide a capillary break to eliminate the risk of frost heave and related moisture problems. Project Gallery Previous Next

< Back Polk & 381st (Stanchfield, MN) Elevating a Swamp Year Completed: 2022 Steve Hass, Proprietor of Hass Construction, has been responsible for township road maintenance for over 30 years. Stanchfield Township (Minnesota) is one of the many townships his company maintains roads for. Steve and the township officials wanted to improve a section of 381st Avenue that crosses a peaty, swampy area. This swamp crossing is 15-20 feet lower than the sandy knolls on both sides of the swamp. The solution is to elevate the valley, to make the roadway easier and safer, improve driving safety for the area’s residents by leveling out this particularly bad area, and reduce the historic issues with frost heaving and flooding. “Elevating the valley by approximately 8 feet makes for a smoother and safer ride, and protects the surrounding land,” said Monte Niemi, CEO of TDA Manufacturing in Isanti, Minnesota. Tire derived aggregate (TDA) was chosen as the lightweight aggregate fill for this project due to its interlocking “snowshoe effect” – where the pieces weave together, helping to spread the weight of the driving surface over the soft the organic soils under the current road. TDA possesses a standing beneficial use designation in Minnesota, which means that it can be used as lightweight fill without a permit (when used in accordance with MPCA directives) for any road construction project that is managed by a professional engineer. Project Gallery Previous Next

< Back Old ballpark used for stormwater management Recycled Tires Hit One Out of the Old St. Paul Saints Ballpark Year Completed: 2016 Previous Next

< Back Woodbury (MN) Maintenance Facility TDA helps city meet 2040 goals for public works expansions Year Completed: 2019 Previous Next

2017 Residential Driveway "The price is extremely good, far cheaper than conventional repair materials. I can't even believe everything they're doing." – Sam Hooper (homeowner) 1990 Minneapolis Convention Center “Waste tire shreds have been used as a lightweight fill material under roads, but never in this unique way. The City of Minneapolis deserves credit for considering and developing this new use for recycled tires. The use of tire shreds saved the developers and taxpayer’s money, reduced the stress load on the parking ramp, made it possible to develop a park above the ramp, and helped recycle a part of our waste that has been a problem for years. We hope that more individuals and companies will develop innovative uses for recycled waste tires and help our state better manage its solid waste” –Gerald Willet (MPCA Commissioner) 1990 Minneapolis Convention Center “This is truly a pioneering effort. Engineering judgment and the past experience we had with the material was relied upon to prepare the final plans and specifications for the material sizing and unit weight, containment, placing and compacting, construct-ability and long-term performance. The application of shredded tires as a lightweight fill has been a success for the Minneapolis Convention Center. Since this project was installed knowledge gained has helped open more doors to the expanded use of shredded tires and is providing an effective engineered application for tire shreds in Minnesota. Our innovative approaches to dealing with weak, compressible soils and cold winters have made us a model nationwide”. –Blake Nelson 1992 I35 Exit Ramp 171 Ted Sexton, an engineer for MnDot said “the ramp had to cross an area filled with marl. Removing the deposit would have required extensive excavation. Recycled tires provided a cost-effective solution that so far has withstood about 10 years of use with no signs of deterioration”. 2015 Midway Office Complex “The use of TDA as a storage facility for stormwater treatment provides an environmentally safe reuse of tires that would otherwise be discarded as waste.” – (LHB Corporation) 2018 American Engineering Testing “The owner was looking for options to save money and the TDA material provides significant savings over using clean stone” -Frattalone Companies 2019 Woodbury Maintenance Facility “Since within the project site green space is very limited, typically we would look at doing surface water features. So, we looked at using these recycled tires in order to be underground, then when it rains the water would then be stored within the void space of these tire shreds and then infiltrate into the ground. That’s less runoff that’s generated and everything is stored within the TDA itself and it’s a way to lower the runoff volume and pollutants.” – Dustin deFelice (Bolton & Menk Engineer) 2019 Stearns Bank Albany, MN “Not only does the TDA slow water down and deal with the capacity, it treats it, as well,” said Shawn Robinson (superintendent with Miller Architects & Builders) 2002 Purgatory Creek, Eden Prairie “I think it saved a ton of money. The wood chips and shredded tires cause less settlement because they’re lighter. If the project would have proceeded in a normal construction using heavier soil fill, a substantial amount of extra material would have to have been imported.” – William Cody (Principal Engineer, American Engineering Testing, Inc.) 2003 Beroun Liquor Store “There has been no movement of the slab. It works great. The customer is very happy. Using tire chips saved time and money on the project. The owner would have had additional excavating and material costs if the traditional methods had been used to dig out the poor soils and bring in fill. Also, it was a wet spring. If I had been working on that site with dirt, instead of tires, I don’t know if I could have completed it in a timely fashion” stated Bob Jones from Jones Construction. 2008 Metro Metals “The system enables this salvage business to exceed current regulatory requirements for onsite stormwater storage while conserving valuable real estate for its business activities” – Wenck Associates 2010 County Road 12 “Shredded tires have certain properties that were advantageous in this case. They have a high interface friction angle and low weight of regular soil.” –Steve Gale (Gale-Tech Engineering Inc.)

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RESIDENTIAL Retaining Walls Retaining walls typically support soil backfills and are designed based on the material properties of the soil backfill. Properties such as unit weight and cohesion of a soil in addition to the height of the soil backfill are important factors in determining the design characteristics of the retaining wall. Generally, materials having higher unit weight and larger overall height will require more robust structures to retain them due to the increase in the lateral forces applied to the structure by the soil. TDA has advantages as an alternative to conventional soil backfill mainly because it is significantly lighter than soil and is free draining. Since the in-place unit weight of TDA typically ranges between 40 and 50 lbs./ft3 (approximately one-third of the unit weight of most soils), it is very effective in reducing the lateral forces applied to the wall. Using TDA as a retaining wall backfill can result in wall designs that use less steel and/or concrete and require less excavation, which can result in significant cost savings over typical soil backfill retaining walls. Driveways & Parking Pads Existing lands can be made up of soft, muddy soil at low-lying grades. These properties need a stable foundation that can be trusted to hold up overlying structures. Using a lift of TDA placed directly on the existing grade creates a strong foundation and eliminates the risk of differential settlement or other failures. The high permeability and thermal insulation properties of TDA help create a capillary break, so moisture can’t wick its way towards the surface (no more cracking or buckling during spring thaw!). In fact, TDA has about 8 times better thermal insulation than soil! SEE PROJECTS

< Back Old ballpark used for stormwater management Recycled Tires Hit One Out of the Old St. Paul Saints Ballpark Year Completed: 2016 Previous Next < Back Project Name This is placeholder text. To connect this element to content from your collection, select the element and click Connect to Data. Heading 6 Project Gallery

< Back Lake Jonathan Flats Five-story apartment complex next to a highway Year Completed: 2018 This five-story apartment complex constructed on Lake Jonathan Flats in Chaska (MN) required a design that reduced the lateral soil load against the east side of the building’s 20-foot-tall pre-cast-concrete foundation wall. The north side underground parking garage is under extra stress because 270 feet away is highway 41, which runs parallel to the building and which is 45 feet above the building’s grade. Engineers designed for a total depth of 14 feet of TDA (Tire Derived Aggregate) to be backfilled against the 12-inch-thick wall. TDA reduces the lateral load and helps control drainage and moisture running from Highway 41 to the nearby lake. Additional benefits of TDA include the following: Reduced Lateral Load: 1/2 the lateral load of soil, which can reduce retaining wall costs. Lightweight: 1/3 weight of soils (600 spare pounds per loose volume cubic yard). Interlocking: Creates a foundation for overlying structures. Permeability: Up to 50% better drainage than gravel. Project Gallery Previous Next