The Geosynthetic Institute (GSI) is a consortium of organizations interested in, and involved with, geosynthetics. All types of geosynthetic materials are involved: geotextiles, geomembranes, geogrids, geonets, geocomposites, geosynthetic clay liners, geopipe and geofoam.

The organizations include federal and state governmental agencies, facility owners, designers, consultants, QA organizations, testing laboratories, resin and additive suppliers, manufacturers, manufacturers representatives and installation contractors. It currently consists of 53 member organizations. See the following section of current members arranged by Focus Groups, which is linked to their respective home pages.

GSI functions under the general oversight of an elected board of directors and the regular interaction with its members. The entire membership meets two times per year and suggests topics and directions. Member organizations share these results as well as a number of subsidiary benefits. These benefits include enrollment in professional courses and seminars at nominal cost, free laboratory training for employees, direct interaction with GSI staff and students, and access to product information services, specifications and test methods. Also available is a control access section of this home page. Among other information in this section is the complete set of GRI standards and specifications, summaries of all GRI proprietary reports and a geosynthetics keyword search of the literature. In the keyword search section are approximately 7500 references placed according to geosynthetic type, function and use. Citations are obtained directly from the listed references.

For information, see the Prospectus.