SERVICES WE PROVIDE
  1. Stream Restoration
    We provide cutting edge stream restoration services to our clients all over the United States. We work on projects from small streams to large rivers and provide assistance to all types of owners and other firms. Our clients range from private land owners to the federal government.
  2. Expert Witness / Litigation Support Services
    We provide expert witness services in the areas of stream restoration failures, hydraulics, sediment transport, floodplain issues, and transportation project interactions. Our President, Dr. Gary Freeman, has served as an expert witness in a broad area including Texas, Alabama, Mississippi, Arizona, Montana, Idaho, and other states.
  3. Catastrophic Flooding Studies
    Background Photo: One inch high erosion features seen on the South Fork of the Boise River above Featherville, Idaho that are similar to 2,500 ft high features found near Lake Powell, Utah
  4. Multi-dimensional Hydraulics and Sediment Transport Modeling
    Our expertise is based on several decades of experience using both physical and computer models for hydraulics and sediment transport.
  5. Project Review and Comment
    Members of our firm have served on a number of Independent External Peer Review panels for US Army Corps of Engineer projects. These have ranged from Gulf Coast projects (Louisiana & Texas) to projects in the Western United States (Nevada).
  6. Fluvial Geomorphology
    We have conducted geomorphic determination of alluvial fans and plains to determine if portions of the fans were active or relict. This has allowed development to occur on portions of the fans that were stable while keeping development off the portions of the fan that are unstable and currently building.
Gary E. Freeman - President
PhD, PE, D.WRE, CFM, JD

David L. Derrick - Vice President
National Stream Restoration Expert
                               Dr. Gary Freeman has more than 35 years of
                               experience in dealing with water related engineering
                               and irrigation issues.  He designed and operated
                               agricultural irrigation systems for 9 years in the US and
                               abroad.  He is a registered Civil Engineer in seven states and (along with Mr. Derrick) has developed and taught stream restoration courses.  He has supervised a number of complex floodplain studies in the western United States and has been deeply involved in performing and directing hydraulics and sediment transport studies across United States for both rivers and alluvial fans.  Projects have included hydraulics, hydrology, sediment transport and fluvial geomorphology.  He has evaluated the stability of rivers and alluvial fans based on combining geomorphic, sediment transort, and hydraulic principles. 

Dr. Freeman spent seven and a half years with the U.S. Army Waterways Experiment Station in Vicksburg, MS as a Research Hydraulic Engineer.  During this time he served as a member of two White House Flood Committees for which he was awarded the Army’s Achievement Medal for Civilian Service.

Recent projects include sediment problems associated with the Ohio River, headcuts from sand & gravel mining operations, and comparisons of the ability of hydraulic and sediment transport models to predict headcut erosion associated with sand and gravel pits.

Dr. Freeman also holds a law degree and has been a licensed attorney in Arizona for since 2001.  This perspective gives him the ability to adapt engineering designs to fit within the legal constraints of the project.  His law degree also allows him to be successful in permitting complex projects.  He has a broad background in the application of hydraulic principles to complex problems and works efficiently with project teams which qualify him to assist clients in the successful completion of difficult projects.

Clients include the U.S. Army Corps of Engineers, USAID, local flood control districts, private clients and state agencies.  He has worked internationally in Africa and Central America.  He has served as an expert witness on cases involving hydraulics, sediment transport, bridge impacts, and failed stream restoration projects
[if gte mso 9]> 800x600 Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Mr. David Derrick has nearly 40 years of experience and was employed at
the U.S. Army Corps of Engineers Research and Development Center from
1978 until he retired as a Research Hydraulic Engineer in the Coastal
and Hydraulics Lab (CHL) in 2013.  He has been Vice President of River
Research & Design since since 1997.

 

A true innovator, he specializes in environmentally compatible, cost-effective approaches and methodologies for design of river and streambank stabilization and riparian corridor restoration projects; stream investigation and analysis using principles of fluvial geomorphology; sediment transport analysis; navigation channel improvement effects of river training structures; innovative construction methodologies for stream stabilization works; river and stream training structure inspection, monitoring, and performance analysis; and physical movable-bed modeling. 


David is a very hands-on practitioner and has been actively involved in the development of innovative workshops (assessment, design, construction, and bioengineering), innovative construction methodologies, construction layout techniques, and inspection and monitoring master plans and guidelines for stream and river restoration projects.  Mr. Derrick has also been involved in dam removal projects, karst topography (sinkhole) stream stabilization, arid dry-wash restorations, as well as salmon and trout stream restoration.  He has practiced in most parts of the country, and his knowledge and practical experience ranges from the Mississippi River to the very smallest of streams.


Mr. Derrick has developed and/or refined numerous cost-effective streambank protection techniques, grade control methods and habitat restoration freatures in the projects that he has worked on. 


Many of his technically complex projects involved multiple agencies and required an interdisciplinary team approach.  Mr. Derrick collaborates both formally and informally with an extensive network of regional, national, and internationally known experts. 
  1. Managing Director
  2. Managing Director
  3. Managing Director
  4. Managing Director
Let us help with your projects!
We provide services to a wide range of clients from the federal government to local agencies and other engineering or restoration firms.  We are happy to play the support role in your projects.  Let us combine our expertise with yours to provide you or your client with a quality, economical, and constructable design. 

We have taught numerous courses on stream restoration geomorphology and other relevant topics.  These classes have been held across the Utnited States and even into Canada.  We can tailor classes to meet your teams needs.  These classes can focus on theory, project conception, design, and/or construction.

If you feel you could use our assistnace, please call us at (480) 275-5077 (Gary Freeman) or (601) 217-7717 (David Derrick).  We look forward to hearing from you.