“The EGRP system technology might best be described as novel and is unique in my over 40 years of experience in water resource management, including wetland design and operation. The system cannot be readily compared with existing surface drainage approaches and technologies that depend on pipes or channels to deliver water to holding basins. The EGRP® system is passive but has great capacity for water movement taking advantage of many mechanisms and processes.”


“EGRP engineers the distribution of water molecules throughout the soil matrix to have a positive influence on surface and soil moisture conditions.”

-Prof. Edwin Herricks

Professor Emeritus of Environmental Biology in the Environmental Engineering and Science Program at the University of Illinois, Urbana, Illinois, USA

“The EGRP promotes surface infiltration, and it increases the volume of storm water that can be infiltrated and stored in the soil matrix by balancing soil-water potential across the vertical and horizontal soil strata in the vadose (unsaturated) zone. This functionality corresponds to improved connectivity between macropores. This connectivity between macropores is necessary for mass flow of free water that is unaffected by soil-water tension, which is negative pressure or suction. Improved connectivity between smaller pores is also essential to diffuse water movement under tension.”


“The EGRP represents an innovative approach to managing stormwater runoff in a practical way in a variety of settings.”

-Prof. Donald Carpenter

Professor of Civil Engineering and Director of the Great Lakes Stormwater Management Institute, Lawrence Technological University, Southfield, Michigan, USA

“Most of the EGRP within the infiltration basin enhanced the local infiltration rate.

• The infiltration rates associated with two of the shallow EGRPs were 7.4 – 8.6 times faster than the infiltration rate associated with native soil conditions.

• The infiltration rate associated with the deep EGRP was 10.2 times faster than the infiltration rate associated with native soil conditions.

Analyses of both the shallow- and deep-data reject the hypothesis that EGRPs function like a pipe which allows shallow infiltration water to “free fall” to the bottom of the devices.”

-David P. Lush, Ph.D.

PhD and Distinguished Senior Research Specialist at the Institute of Water Research, University of Michigan, Ann Arbor, Michigan, USA

“In times of water shortage, the lowering of the water table in this same piezometer is less important, as if the EGRP tubes worked to maintain a degree of saturation as constant as possible in the soil.”

-Isabelle Morin

Geotechnical engineer, GADZ, Geneva, Switzerland

“As an airport manager, I would recommend this product to any of my peers. This system if utilized at its maximum capability can be a tool that will reduce costs associated with operating an Airport, while increasing safety. ln addition to these reasons for purchasing the product, it is important to note that I was initially interested in the technology because it is totally green and recharges the ground water system, increasing the ability for human beings to have fresh clean water.”

-Jason K. Watt

Airport Director, Coleman A. Young International Airport, Detroit, Michigan, USA

“I am very pleased with both the installation of the EGRP system and its performance. The ground has become much less saturated. We have been able to mow Hole #3 much more consistently even after heavy rainfall. Even more important, I am very excited there is no required maintenance on the system as it appears to be getting better and better with time.


Thank you very much for delivering on every aspect of your commitment. Your EGRP technology has solved an 80 year old problem at our family golf course and we are so happy to endorse it to resolve any water infiltration problem at golf courses or fields.”

-Paul Beaupre

Owner, Plum Brook Golf Club, Sterling Heights, Michigan, USA

“The drainage infiltration rates achieved are more promising and higher than could have been expected given the nature of the site.”

-Paul Woodham

Agronomy Service Manager, STRI, The Sports Turf Research Institute, Bingley, UK