Testing Technical Oversight
Joel Sprague, P.E., TRI's Senior Engineer provides technical oversight of all of TRI's erosion and sediment control testing and can be contacted at:

Mr. C. Joel Sprague, Senior Engineer
TRI/Environmental, Inc.  PO Box 9192, Greenville, SC  29604
Ph: 864/242-2220; Fax 864/242-3107; jsprague@tri-env.com

Mr. Sprague is a long-time member of the senior technical staff of TRI/Environmental, Austin, TX. specializing in research, development, and application of geosynthetics, plastic pipe, and erosion and sediment control technologies.  He is co-chair of the subcommittee on mechanical properties in the ASTM D35 Committee on Geosynthetics.  He is also actively involved in ASTM D18.25 Subcommittee on Erosion and Sediment Control.  He is a registered professional engineer in North and South Carolina, Georgia, and Texas.   Mr. Sprague has been involved with the design, research, development, and application of erosion and sediment control systems/materials for many years. He was the lead consultant in the development of bench-scale testing procedures for the Erosion Control Technology Council.  Mr. Sprague has authored numerous technical papers on his research.   He received the Richard S. Ladd Standards Development Award for his work on standards D 6461 and D 6462 on Silt Fence Materials and Installation, respectively.  In 2003, he received the 2003 Award for Outstanding Article on the Practice of Geotechnical Testing for his paper titled, "Development of RECP Performance Test Methods" in ASTM's Geotechnical Testing Journal.  Also, Mr. Sprague was awarded the Most Distinguished Technical Paper Award 2007 for his paper titled "Slope Erosion Testing: Identifying "Critical Parameters."

Operations Management
Sam Allen, TRI's Division Vice President provides operational management of all TRI laboratories and can be contacted at:
Mr. Sam Allen, Vice President & Program Manager
TRI/Environmental, Inc.  9063 Bee Caves Road, Austin, TX  78733
Ph: 512/263-2101; Fax: 512/263-2558; sallen@tri-env.com

Mr. Allen pioneered the laboratory index testing of rolled erosion control products (RECPs).  He set up and oversees TRI's erosion and sediment control testing laboratories.  His oversight responsibilities include test coordination, reporting, and failure resolution associated with the National Transportation Product Evaluation Program (NTPEP) for RECPs.

Index & Bench-scale Laboratory Manager
Jarrett Nelson, TRI's Special Projects Manager provides operational management of TRI's erosion and sediment control index and bench-scale testing efforts and can be contacted at:

Mr. Jarrett Nelson, Special Projects Manager
TRI/Environmental, Inc.  9063 Bee Caves Road, Austin, TX  78733
Ph: 512/263-2101; Fax: 512/263-2558; jnelson@tri-env.com

DDRF On-Site Lab Manager
Randy Massingill, TRI's Field Lab Manager provides direction to site technicians on site operations and testing protocol and can be contacted at:

Mr. C. Randy Massingill, Field Lab Manager
Denver Downs Research Farm,  4915 Clemson Blvd.,  Anderson, SC  29621
Ph: 864/201-2153; cmassingill@tri-env.com