Invisible Structures, Inc.

Porous Paving and Stormwater Solutions

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3510 Himalaya Rd. Suite 200
Aurora, CO 80011
Phone: 303-233-8383
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Porous Paving Systems  

THE STRONGEST ROOTS IN POROUS PAVING

Grasspave2 was our first product in 1982. In fact, it was the first in the industry. Built first and made to last, this innovative porous paving solution comes in easy-to-install rolls. It's flexible, lightweight, durable and provides design versatility for any project.

Rated 5 based on 1 product reviews
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POROUS PAVING ROCKS

Created by a landscape architect, Gravelpave2 has been the trusted choice for low maintenance porous paving since 1991. With a compressive strength 5 times that of concrete, Gravelpave2 can support the weight of virtually any vehicle. Made from 100% recycled plastic, the lightweight and flexible rolls allow for quick and easy installation and can be easily trimmed for design versatility. Gravelpave2 is available in custom colors, making the possibilities limitless.

Rated 5 based on 1 product reviews
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Portable Boardwalk  

THE WELCOME MAT FOR ACCESSIBILITY

Beachrings2 is an ADA-compliant walkway that provides access to some of nature's trickiest terrain, such as sand, mud, grass, gravel, and shallow snow. Introduced in the late 1980s, it was the first plastic portable access mat. The textured and slip-resistant surface stays cooler than sand in the hot sun, plus it's durable, UV resistant, and easy to clean.

Rated 5 based on 1 product reviews
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Stormwater Storage System  

A BETTER WAY TO CONTAIN THE RAIN

Rainstore3 is a modular, stackable, underground water containment system. This innovative solution was designed by a landscape architect for subsurface detention basins, retention/harvesting systems, water/rain gardens, green roofs, and sports field drainage. 

Featuring a lifetime warranty, the first Rainstore3 installation was in 1999 and all existing installations are still going strong.

Rated 5 based on 1 product reviews
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3-dimensional Soil Containment System  

ALWAYS MAKING THE GRADE

Slopetame3 provides an immediate and permanent solution to erosion and sedimentation problems, Using our trademark interlocking ring-on-grid design with theadded benefit of crossbars on every row, Slopetame3 is a one-of-a-kind permanent reinforcement and stabilization system that is strong enough to support pedestrians and light vehicles.

Rated 5 based on 1 product reviews
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Landscaping and Site Drainage Products  

RAPID DRAIN WITH NO PAIN

Draincore2 was designed by a Landscape Architect to address drainage in areas where shallow and rapid drainage is required. A 92% void space allows drainage at the rate of 42 gallons per minute (per square foot), so even the heaviest rains won't leave standing water on the surface. Its high compressive strength can support any vehicle—making it an ideal solution for outdoor sports fields and golf courses.

Rated 5 based on 1 product reviews
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Case Studies  

The Allen Airways Flying Museum in El Cajon, California, found a great use for Grasspave2: the museum needed an attractive space and its airplanes need to be moved without problem. Grasspave2, with a proper base course, supports even a DC-10 jet airliner and easily supports the museum's small aircraft.

PRODUCTS USED:
Grasspave2

Rated 5 based on 1 product reviews

Q2 Stadium is a soccer-specific stadium located in Austin, Texas, home to Major League Soccer (MLS) team Austin FC. In 2021, the North Lot of the stadium was redesigned and incorporated Grasspave2, a grass pavement system. This redesign was likely aimed at improving the functionality and sustainability of the North Lot, providing a more eco-friendly and aesthetically pleasing solution for parking and event spaces. The Grasspave2 system allows for the growth of grass while still supporting the weight of vehicles and foot traffic. This helps to reduce heat island effects, manage stormwater runoff, and create a more environmentally friendly and versatile space for various events and activities.

PRODUCTS USED:

Grasspave2

Rated 5 based on 1 product reviews

When a woman married to a person with a spinal cord injury read about Beachrings2, she knew it was exactly what they needed for their trip to the Bahamas. She called the airline and consulted with a compliance officer to learn how to travel with Beachrings2 for medical/disability use. After getting their doctor to write a letter of medical necessity on office letterhead, they were in business. There was no charge to take them to and from U.S. destinations.

PRODUCTS USED:
Beachrings2

Rated 5 based on 1 product reviews

Home to the Oklahoma State Cowboys and the oldest football specific stadium west of the Mississippi, Boone Pickens Stadium needed a state-of-the-art drainage layer under the real grass to replace the artificial turf. Oklahoma State chose Draincore2, with its 42 gallons per minute per square foot drainage.

PRODUCTS USED:
Draincore2

Rated 5 based on 1 product reviews

70,000 sq ft of Draincore2 and 70,000 sq ft of Grasspave2 makes the Christ Chapel parking lot a model of drainage efficiency. Draincore2 sits atop an impermeable liner and conveys water, at a slope, to pipe at the lowest portion of the system. Pipe carries water to a sump pump. A geotextile filter fabric separates Draincore2 from 12 inches of base course. Grasspave2 was placed on top of the base course for 70,000 sq ft of grass parking. The parking lot is only open when services are in session. All other time bollards prevent the Grasspave2 parking lot from being used. Daily visitors park in an impermeable concrete lot.

PRODUCTS USED:
Draincore2
Grasspave2

Rated 5 based on 1 product reviews

The designers of the museum chose Gravelpave2 to protect the trail from erosion, provide a wheelchair-friendly surface and add an attractive walking surface, and Grasspave2 was used in the fire lane/access area to add green space. Pedestrian friendly, the Dogwood Trail features over 500 dogwood trees that flower during spring. In addition to being the longest trail on Crystal Bridges property, the Dogwood features several natural seating areas carved out of the forest. This trail connects to the Rock Ledge Trail and the City of Bentonville's Enfield Trail.

PRODUCTS USED:
Grasspave2
Gravelpave2

Rated 5 based on 1 product reviews

The homeowners used a combination of three Invisible Structures products for this project: Rainstore3, Grasspave2 and Gravelpave2. The existing soil is a clay-based soil that turns to a vaseline consistency when wet. The owners used a single layer of Rainstore3 filled with sandy gravel as a base course structure to shore up the foundation of their project and instantly transform the loading capacity to exceed H20. Above the Rainstore3, they installed Gravelpave2 over the higher traffic area and Grasspave2 over the lower traffic area to replace the constantly cracking concrete and create a more park-like environment in their yard. The result is beautiful.


PRODUCTS USED:
Rainstore3
Grasspave2
Gravelpave2

Rated 5 based on 1 product reviews

This project is a culmination of thirty years of energy-efficient design and site-specific project planning by Michael Barron-Wike Architect AIA. The completed residence is a “Certified Green” project, documented through Build It Green. This project had many challenging design requirements, due to its location, one of the most spectacular places along the northern California coastline, overlooking the Gualala River entrance to the ocean. 

PRODUCTS USED:
Grasspave2

Rated 5 based on 1 product reviews

K. Dakin Design was looking for a unique and beautiful way to build two patios on the back of this residential house. Gravelpave2 was a great solution. Normally, a unsupported crusher run (breeze) is used in the space between the flagstones. Here, a larger gravel was filled into Gravelpave2. Gravelpave2 will prevent the rutting, erosion, and settling normally associated with the crusher run. The Gravelpave2 supported flagstone patio will provide a lower maintenance and longer lasting patio. This patio with water feature and integral sandstone pavers. This project really shows off what the Gravelpave2 can do to reinforce gravel laterally and vertically.

PRODUCTS USED:
Gravelpave2

Rated 5 based on 1 product reviews

Facebook's data needs have grown rapidly enough they needed their own data center. Facebook/Meta's new data center has a host of ecologically friendly features, such as evaporative cooling, airside economizer, server heat reuse, state-of-the art UPS, and Gravelpave2 porous pavement. Gravelpave2 was used as the access and service road for heavy trucks, deliveries, and more. Gravelpave2 provides the site with the paving strength it needs and porosity for stormwater management.

PRODUCTS USED:
Gravelpave2

Rated 5 based on 1 product reviews

The Foster Beach on Lakeshore Drive in Chicago relies on Beachrings2 to provide access to as many individuals as possible. The beach recreation information guide says “all of our beaches are handicapped accessible”. Beachrings2 is also decidedly convenient to bike riders and baby strollers.

PRODUCTS USED:
Beachrings2

Rated 5 based on 1 product reviews

The designer of this private home was attracted to Gravelpave2 for use as the gated drive. It resulted in a beautiful, low maintenance driveway that will last for at least 60 years without ruts, mud or standing water.

PRODUCTS USED:
Gravelpave2

Rated 5 based on 1 product reviews

With the demand for outdoor seating increasing, this hotel in Healdsburg, CA used Tan Gravelpave2 to convert an old grass area to an outdoor patio. The finished results create a clean, easy to maintain, ADA Accessible area that will remain mud and water-free on the surface.

PRODUCTS USED:
Gravelpave2

Rated 5 based on 1 product reviews

IDEA Camp Rio needed a way to reduce the runoff coefficient for this site development and turned to Gravelpave2 in order to get maximum infiltration while providing support for the buses, fire trucks, and other vehicles. The site contains several roads and parking areas, complimented by a concrete ribbon bordering the roadways.

PRODUCTS USED:
Gravelpave2

Rated 5 based on 1 product reviews

The Isotopes needed soil stabilization done beautifully. Slopetame3 was the logical answer providing erosion control and grass coverage to match the nicely kept grounds and field. Grass slope areas beyond the fence and the outfield were all done in Slopetame3 . From the Isotopes Official Website - "Beyond the right field fence is the Creamland Berm, a popular place for families to stretch out on a blanket and enjoy some baseball on a starry southwestern night." The Creamland Berm is supported with Slopetame3.

PRODUCTS USED:
Slopetame3

Rated 5 based on 1 product reviews

Lakehead University Orillia Campus implemented a unique system to capture stormwater from the adjacent road that relies on Rainstore3. The stormwater will flow into a catch basin, move through a filtering system, flow to a chamber for storage, and then the water is pumped to the above ground water feature. The underground chamber was designed to capture, retain and harvest grey water for reuse in addition to being connected to the city’s storm system. The grey water feeds both the surface pond and toilet flushing for the building.

PRODUCTS USED:
Rainstore3

Rated 5 based on 1 product reviews

Grasspave2 was selected as an invisible driving surface, erosion prevention, and swale reinforcement. The grass areas, between and surrounding the south airfield, were reinforced with Grasspave2. Emergency vehicles can easily traverse the area without sinking or getting stuck. The Grasspave2 is powerful enough to support the largest aircraft, however the grass seldom sees aircraft ground traffic, except in cases of emergency. The porous Grasspave2 collects stormwater and delivers it to an underground chamber.

PRODUCTS USED:
Grasspave2

Rated 5 based on 1 product reviews

he Miami Beach Botanical Gardens allows garden rental where many events are held on the grounds, such as weddings, concerts and parties. A large section of the grounds is dedicated to supporting vehicular traffic thanks to Grasspave2.

PRODUCTS USED:
Grasspave2

Rated 5 based on 1 product reviews

Caltrans and the City of Murietta partnered to improve the interstate interchange at I-215 and Los Alamos Rd in Murietta. Part of the improvement was to make the interchange more attractive and brand it more to the city. Using the city’s signature emblem, the diamond, designers used decorative stones and vegetation to decorate the slopes. Slopetame3’s permanent fabric backing, cross-bars on every row, and only 1” required fill makes an excellent, permanent solution to erosion.

PRODUCTS USED:
Slopetame3

Rated 5 based on 1 product reviews

For over a century, the Washington National Cathedral has dedicated itself to providing a walk to the Cathedral that provides a respite from the city... offering wonder and charm and a taste of Mother Nature. Unfortunately, the area was plagued by flooding, erosion and run-off issues. Runoff washed out vegetation and rutting, pooling and the loss of vegetation began to impact the lushness and beauty of the forest. 

By installing Rainstore3 in the Olmsted Forest the runoff from the stormwater could be captured and allowed to seep into the ground to prevent further erosion and promote the regrowth of the lost vegetation and paths were clear of pooling and the riverbank was rebuilt as water levels running through became lower.

PRODUCTS USED:
Rainstore3

Rated 5 based on 1 product reviews

“What is this stuff?” is the second most common question at the National Garden at the United States Botanical Garden site, and the answer is "Gravelpave2". The Gravelpave2 pathways add a beautiful and porous surface to the grounds. The Architect of the Capitol wanted the sound and feel of gravel but needed ADA compliance for all visitors. 

PRODUCTS USED:
Gravelpave2

Rated 5 based on 1 product reviews

This was a reconstruction project where an existing trailer park was demolished and new townhomes built. In order to comply with City of Dunedin and the State of Florida Stormwater runoff regulations, a detention system was needed. From initial excavation to completion of the installation, it took three days to create the Rainstore3 chamber that can hold up to 50,000 gallons of water.

PRODUCTS USED:

Rainstore3

Rated 5 based on 1 product reviews

Gravelpave2 was used as an ADA access trail in this nature preserve in Illinois. In spite of occasional heavy rains and consistent foot traffic, the path has needed minimal maintenance and the repairs that have been necessary have been straightforward.

PRODUCTS USED:
Gravelpave2

Rated 5 based on 1 product reviews

Grasspave2 was selected as a “green” alternative for helicopter landing pads at the Pentagon RDF, which is the largest green roof east of the Mississippi. Grasspave2's high compressive strength (15,940 psi) is more than adequate to land a helicopter. The Pentagon RDF is also a LEED Certified project. Grasspave2 helped get the certification with its 100% recycled content, stormwater benefits, and heat island mitigation.

Additionally, Gravelpave2 was chosen as a part of the Pentagon Memorial, dedicated to the people who lost their lives at the Pentagon in the 9/11 attacks. The gravel surface is unique compared to many of the granite, marble, and concrete walking surfaces at memorials and monuments in Washington, D. C. and Gravelpave2 stabilizes the loose aggregate and to allow for pedestrian, wheelchair, and stroller access.

PRODUCTS USED:
Grasspave2
Gravelpave2

Rated 5 based on 1 product reviews

This comprehensive design team planned a system to collect rainwater from Epler Hall and neighboring King Albert Hall. The water is collected from the roof and ground level plaza area. Rainwater is then conveyed through downspouts to river rock splash boxes at ground level. The river rock splash bed delivers the water to small decorative conveyance streams made up of exposed Belgium blocks. The water meanders through the block pattern as it travels across the plaza, dubbed “Eco-Alley.” The rainwater is channeled into raised planters which double as bio-swales. Some of the water is used for the decorative vegetation in the planters but the majority of the water filters down into an underground stormwater storage chamber. Irrigation water is ready to use. Toilet water gets pumped into a mechanical room inside the Hall, goes through an additional sand filter, UV disinfection, and then gets pressurized. Estimations conclude nearly 110,000 gallons of potable water are saved annually. This equates to be an annual savings of nearly $1000 for water/sewer cost for College Housing Northwest and ultimately, PSU students and Oregon Taxpayers. Designers incorporated many other environmentally friendly and sustainable features into Epler Hall. Wind cooled stack ventilation, passive solar heating and solar lighting, heat recapture, and providing for alternative transportation. Because of the successful design, Epler Hall has received a Silver Rating from the United States Green Building Council's Leadership in Energy and Environmental Design standard.

PRODUCTS USED:
Rainstore3

Rated 5 based on 1 product reviews

rom an article in Stormwater Solutions —- Storing water for aboveground water features at an office park - simple, right? Not so fast. The Santa Monica, Calif., Water Garden office park does not have a normal, garden-variety water feature. A series of walkways, a river, gardens, multiple pools, fountains, an amphitheater and other amenities are located on 17 acres of a complex manmade topography. Civil engineering firm Psomas and landscape architectural firm KSA Design Studio had to find a way to store the water under the “oasis in the city” in the most efficient way possible

The elaborate site called for nine different depths of water-storage chambers from 30 to 110 cm high. A modular and design-flexible solution was needed. Psomas turned to a product called Rainstore3 – a modular-underground water-storage system. It is engineered to be stackable in varying heights and can support H-20 loading requirements. Additionally, its geocells are manufactured from 100% recycled content. Every available depth from 30 to 110 cm, in 10-cm (4-in.) increments, was provided with Rainstore3. The entire water-feature network required more than 9,000 units of the product. “[It was] A big puzzle,” said Steve Lacap, project lead designer for KSA, referring to placing the Rainstore3 product to level out the landscape and prepare for the final grade. “Existing soils were as deep as 6 ft in some places.”

PRODUCTS USED:
Rainstore3

Rated 5 based on 1 product reviews

Rainstore3 was selected to be a key component of New York's South Battery Park City Resiliency Project. The project intends to improve the aesthetics of the area while protecting Lower Manhattan against storms like Hurricane Sandy.

Rainstore3 will be relied on for storm drainage and as a water retention and graywater system to feed a new building that will be added in Battery Park. The project is on track to be completed in mid-2025 and Rainstore3 will be doing its part for decades to come.

PRODUCTS USED:
Rainstore3

Rated 5 based on 1 product reviews

State Farm Stadium in Glendale, Arizona, is home to the NFL's Arizona Cardinals and Draincore3 plays an important part of the stadium's retractable field. The Cardinals needed a novel solution in order to have natural turf on the field for game day while allowing concerts and other events to happen in the dome at other times. A steel and concrete tray contains the field with built-in irrigation over Draincore2.

PRODUCTS USED:
Draincore2

Rated 5 based on 1 product reviews

Dealing with the high water table is problematic for Tulane University and all of New Orleans. Designers from Gould Evans Associates and Lee Ledbetter & Associates needed a way to store the site's runoff from stormwater while maximizing the limited area for an athletic practice field. Rainstore3 was chosen for the detention system in one chamber with two heights: one section at 5 units high (50cm) and the other area at 7 units high (70cm). Precautions had to be made in the design of the system as the water table will exert upward force on the chambers at different times. Designer ended up wrapping nearly all of the sides of the chamber (leaving the top for infiltration) with a impermeable membrane. Calculations were made to see how buoyant this made the Rainstore3 system. Then designers could counteract the upward buoyancy pressure with static pressure from the cover material and athletic field surface turf preventing the system from "floating" or popping up. The chamber is capable of holding 1428 cubic meters (50,000 cu ft) of stormwater.

PRODUCTS USED:
Rainstore3

Rated 5 based on 1 product reviews

PBR Hawaii & Associates and Takano Nakamura Landscaping teamed up to create a beautiful green space for the community of Ward Village. In the heart of Honolulu, Hawaii this beautiful park includes 69,402 square feet of Grasspave2 used for special events, overflow parking, and access for emergency vehicles.

PRODUCTS USED:
Grasspave2

Rated 5 based on 1 product reviews

Grasspave2 is integrated well into the design with curving hard surfaced pedestrian walkways. At the opposite end of the building is an interesting alternating strip pattern using grass and concrete.

PRODUCTS USED:
Grasspave2

Rated 5 based on 1 product reviews