Beneficial Use of Dredged Material
John Poullain, P.E.
This two hour
online course provides an overview for the planning, design and selection of
dredged material as a manageable, beneficial resource as an alternative to normal
methods of disposal. Land creation with dredged material often consists of filling,
raising and protecting areas that are periodically submerged. The type of areas
considered in this course are parks, agricultural, forest, solid waste landfill,
industrial, commercial and residential use. Habitat development, which includes
wetland, island and aquatic habitats, is not discussed here.
This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.
At the conclusion of this two-hour course, the student will
Be familiar with the procedures for planning, designing and developing areas for feasible beneficial use.
Learn the value of dredged material as a resource and importance of studying beneficial use areas in the initial planning stages.
Be familiar with the types of beneficial use land creation and to consider the alternatives.
of local, state and federal level restriction regarding regulatory and environmental
This course is intended for civil and environmental engineers and planners.
About 70% of dredged material in the US are placed in aquatic disposal areas, open water, such as river channels. This course discusses confined disposal areas where the dredged material is used as a resource that can provide beneficial uses rather than solely as a disposal necessity. Typical uses are parks, recreation, forests, solid waste landfill, industrial, commercial and residential use.
Course or fine-grained
materials may be used for land creation. The types of dredged materials will
determine the suitability of how the land can be used. For instance, fine-grained
material requires a long time to drain and consolidate. Development of such
land may be limited to recreation uses; parks or where the imposed loads are
required to be low because of the resulting weak soil strengths. The time and
availability of suitable dredged material often limit the type of land use.
Sound and careful long term planning and design can overcome these constraints.
Also it should be noted dredged material contaminants usually fall within acceptable
limits. However, contaminated dredged material can be reused in several beneficial
ways as fill material, for construction and environmental projects. And also
as raw material for manufacturing building products such as building blocks,
tiles and top soil.
The purpose of this course is to provide an overview for planning,
designing, developing and managing dredged material for beneficial uses. Ecological
concepts and biological, economical and social feasibility concerns along with
engineering designs are discussed.
You are required to study the following US Army Corps of Engineers
Manual, Chapters 1- 3, 11- 13 and 15 of Beneficial Use of Dredged Material EM
1110-2-5026, 1987 Edition, 66 pages, PDF. Item references made in EM 1110-2-5026
are for bibliographic purposes only.
The links to for the chapters (in PDF format) required for this
course are as follows:
Chapter 1. Introduction
Chapter 2. Dredged Material as a Resource
Chapter 3. Logistical Considerations
Chapter 11. Parks and Recreation
Chapter 12. Agriculture, Horticulture and Forestry
Chapter 13. Strip Mine Reclamation
Chapter 15. Construction and Industrial/ Commercial Uses
You need to open or download the above documents to study this course.
Urban sprawl has
reduced the availability of dredge disposal areas, which has increased the cost
of dredging by increasing the distances to available disposal areas. Environmental
restrictions have also increased costs of disposal. Dredged material can be
a valuable commodity by placing in beneficial use areas while also increasing
land available for many purposes including land developmental uses. Among the
factors for the end user to consider are physical, engineering and chemical
characteristics and the transport and handling of the material.
For additional technical information related to this subject, please refer to:
ER 1105-2-40 Economic
The Beneficial Reuse of Dredged Material prepared for the Port of Long Beach, Long Beach, California, 2000, by Harding Lawson Associates
Once you finish studying the above course content, you need to take a quiz to obtain the PDH credits.