Case Studies

Installation in Australia from Fernando Molina on Vimeo.


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  • Los Angeles International Airport Runway 25L Bioswale

    The Runway 25L Relocation & Center Transitway Improvement at Los Angeles International Airport—LAX has two long Bioswales, one on each side of the new center taxiway, between the taxiway and the adjacent runways. An existing 32” diameter con-crete drainpipe that runs through the center of the Bioswales has been retrofitted with inlets every few hundred feet to accept overflow.

    • 13,828 Lineal Feet—over 2.6 miles of Bioswale
    • 423,000 Cubic Feet / 3,164,040 Gallons / 9.7 Acre Feet
    • 61,460 EcoRain ER-502 Double Tanks
    • 32” diameter existing storm drain retrofitted with inletsevery few hundred feet in the center of the Bioswale.
    • Project built November 2006 to March 2008
    • LAX is operated by the Los Angeles World Airways—LAWA, a department of the City of Los Angeles.
    • HNTB Engineers designed the Bioswale, CH2M Hillserved as site engineers, and Tutor-Saliba Construction asthe General Contractor.


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  • Navajo Nation Rough Rock Community School, Arizona

    The Navajo Nation has chosen EcoRain Tanks to harvest rain water from the roofs of Rough Rock Community School. Always a leader, Rough Rock – Tse Ch’zhi – was built in 1966 as the first commu-nity-run school in the U.S. The School and the U.S. Bureau of Indian Affairs have chosen EcoRain Tanks for the first cisterns in the area to provide 100% irrigation needs.

    • Two 32,000 gallon cisterns designed to supply 100%irrigation water via pumps and drip systems. When rainwater supply runs low—the Tanks fill with potable water.

    • LEED Silver Certification pending approval.

    • 100% recycled Polypropylene materials.

    • EcoRain Tanks are wrapped with Geotextile Material &placed on top and sides with sand, inside a liner to filterwater..

    • Local General Contractor Warner’s Landscape Companyhired and worked with local Native Americans who builtand operate the Cisterns.

Detention & Exfiltration

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  • Sara Coughlin Elementary School, LAUSD, Pacoima, CA

    This underground storm water detention system was installed in May 2008 and was the first of many sub-sequent EcoRain Tank™ systems designed and in-stalled in the Los Angeles Unified School District. The School District used this installation as a trail for assessment and found through bidding that the EcoRain Tanks™ were the most cost effective to install. EcoRain Tanks™ have a 95% void space, and each unit take only minutes to assemble and in-

    • The EcoRain Tank™ underground storm waterdetention system used at this school has a 23,000 cubicfeet capacity.

    • The goal of the system is to collect storm water runoff,keeping it out of the Los Angeles River system andexfiltrate the water into the aquifers. Residents of theLos Angeles area use water from the aquifers for dailyneeds.

    • EcoRain Tanks™ use up to 80% less aggregate fill thanother pipe and pipe arch systems.

    • This system was designed by JMC. Engineers.

    • The Contractor was J & C Underground.

Green Roofs



  • Branson High School, Ross, CA

    A private school located in the woodlands of Ross, CA showed innovation by installing two green roofs on the new cafeteria/lounge building for students.

    Planted with native annuals and perennials, the roofs do not require irrigation. By covering the roof sections with an aerated layer of 1”(25mm) Drainage Cells and soil/plant cover, the rooms below maintain a more even temperature.

    • Installed during the summer of 2009.

    • Two sections totaling over 3,000 square feet of ER- 301 1”(25mm) Drainage Cells.

    • Instead of using an expensive green roof system, the designer specified the use of EcoRain Drainage Cells as the under drain, with a free-flowing soil mix.

    • The roof was waterproofed, then a layer of 1”(25mm) Drainage Cells laid with a layer of Geotextile fabric over the top and tucked around the ends of the Cells. After which the sandy soil mix was spread and seeded just before the rainy season.

    • George’s Landscaping installed the green roofs.

H-25 Loading

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  • United States Naval Air Station, Jacksonville, FL

    The U.S. Navy opted to collect rain water from the helicopter hangar to use in the helicopter washing bays. They designed the system with EcoRain Single Tanks—1.5’ tall. The photographs show how a plastic liner was first installed, then a layer of sand placed inside the liner to aid in water purification.

    All built under a parking lot.

    • Two separate water reuse structures: 60,000 gallons and 40,000 gallons.

    • Constructed in April 2009, the first Tank structure took 4.5 days to complete, the second Tank structure took 3 days to


    • Total number of EcoRain Single Tanks used was 23,200.

    • Native backfill was used for sand/gravel backfill mixture due to naturally high porosity rates.

    • Total excavation footprint for each structure did not exceed two feet due to high water tables.

Highway Median BMP



  • Imperial Highway, Los Angeles, CA

    Bio-filtration fits snugly between lanes of traffic and the industrial runoff from a major highway, sanitation proc-essing plant, residential communities & the ocean. This urban street median storm water project is located on Im-perial Highway between Pershing Drive and Main Street in El Segundo, CA. It is in a highly traveled street that divides LAX Airport and the residential neighborhoods of El Segundo. It also leads directly to Santa Monica Bay and the Pacific Ocean…just down the street. Keep that pollution out of our oceans!

    • The City of Los Angeles Department of Public Works, Bureauof Sanitation conceptualized this project as one of 32 stormwater Best Management Practice projects funded byProposition O. Project was completed November 2009.

    • The storm water runoff project is a bio-filtration systemcomprised of vegetated swales and an infiltration trenchcontaining approximately 13,000 cubic feet of EcoRain Tanks™ that will collect runoff from a 7.5-acre area.

    • It is removing bacteria, oil, trash and suspended solids fromstorm water that would otherwise be discharged to SantaMonica Bay and the Pacific Ocean.

    • Shrubs and trees were planted in the project area, and anautomated irrigation system that uses recycled water wasinstalled.

    • Park West Landscape Inc. installed the EcoRain Tanks andlandscaping.


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  • Hermosa Beach, California

    During storms, the streets of Hermosa Beach used to sheet water to low spots and pool, which created dangerous driving conditions until the water evapo-rated or made it’s way to the storm drain system. A simple, inexpensive solution was to install a row of EcoRain Tanks under an inlet to allow the water to seep into the substrate.

    • The City’s maintenance department dug a pit in a low spoton Valley Avenue at 2nd Street.

    • They placed ER-401 EcoRain 2” Drainage Cells™ as astrength mat on the bottom and top of three ER-502EcoRain Double Tanks™ wrapped in Geotextile fabric.

    • They backfilled with sand and then placed a pre-fabricatedconcrete inlet structure on top of the 2” Drainage Cell™layer. Further backfill was placed around the inlet, thenpavement on top.

    • ER-301 Drainage Cells™ line the inside of the inlet totransport water from the sides as well as the bottom whenwater fills the inlet.


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  • Mar Vista Surge Tank Los Angeles CA

    Mar Vista now has a BMP system that will reduce pollut-ant loading in storm water runoff diverted from an existing 78” storm drain in the adjacent Sawtelle Blvd. Currently treated water is diverted back to the storm drain. The water is being monitored for up to one year. After testing, if the water is safe, they hope to use it to irrigate Mar Vista Park.

    The system includes the following “treatment train”:

    • Diversion Structure

    • Trash Maintenance Hole

    • Influent Pump Station

    • CDS Hydrodynamic Separator

    • Underground EcoRain® Detention Tank 7’ deep x 47’ wide x 108’ long

    • Chlorination/Dechlorination System

    • System designed by PSOMAS & the City of LA,installed by Los Angeles Engineering