Portland District

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Environmental stewardship

Images from our environmental stewardship missionsOur environmental stewardship mission focuses on restoring, enhancing and maintaining ecosystems while meeting our other missions.


Portland District looks for ways to naturally store floodwaters, improve water quality, restore fish and wildlife habitat, conserve energy and minimize waste.

Our environmental operating principles

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  • Foster sustainability as a way of life throughout the organization.
  • Proactively consider environmental consequences of all Corps activities and act accordingly.
  • Create mutually supporting economic and environmentally sustainable solutions.
  • Continue to meet our corporate responsibility and accountability under the law for activities undertaken by the Corps, which may impact human and natural environments.
  • Consider the environment in employing a risk management and systems approach throughout the life cycles of projects and programs.
  • Leverage scientific, economic and social knowledge to understand the environmental context and effects of Corps actions in a collaborative manner.
  • Employ an open, transparent process that respects views of individuals and groups interested in Corps activities.

Our Environmental Operating Principles were developed to ensure that U.S. Army Corps of Engineers missions include totally integrated sustainable environmental practices. The Principles provided corporate direction to ensure the workforce recognized the Corps of Engineers role in, and responsibility for, sustainable use, stewardship, and restoration of natural resources across the Nation and, through the international reach of its support missions.


Since the Environmental Operating Principles were introduced in 2002, they have instilled environmental stewardship across business practices from recycling and reduced energy use at Corps and customer facilities to a fuller consideration of the environmental impacts of Corps actions and meaningful collaboration within the larger environmental community.


The concepts embedded in the original Principles remain vital to the success of the Corps and its missions. However, as the Nation's resource challenges and priorities have evolved, the Corps has responded by close examination and refinement of work processes and operating practices. This self-examination includes how the Corps considers environmental issues in all aspects of the corporate enterprise. In particular, the strong emphasis on sustainability must be translated into everyday actions that have an effect on the environmental conditions of today, as well as the uncertainties and risks of the future. These challenges are complex, ranging from global trends such as increasing and competing demands for water and energy, climate and sea level change, and declining biodiversity; to localized manifestations of these issues in extreme weather events, the spread of invasive species, and demographic shifts. Accordingly, the Corps of Engineers is re-invigorating commitment to the Environmental Operating Principles in light of this changing context.


The Environmental Operating Principles relate to the human environment and apply to all aspects of business and operations. They apply across Military Programs, Civil Works, Research and Development, and across the Corps. The Principles require a recognition and acceptance of individual responsibility from senior leaders to the newest team members. Re-committing to these principles and environmental stewardship will lead to more efficient and effective solutions, and will enable the Corps of Engineers to further leverage resources through collaboration. This is essential for successful integrated resources management, restoration of the environment and sustainable and energy efficient approaches to all Corps of Engineers mission areas. It is also an essential component of the Corps of Engineers' risk management approach in decision making, allowing the organization to offset uncertainty by building flexibility into the management and construction of infrastructure.

Fish programs and resources

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Anadromous Fish Evaluation Program

The second largest river system in the U.S., the Columbia Basin drains 260,000 square miles. Roughly 400 dams and diversion structures were built in the basin over a 70-year period. While this Federal Columbia River Power System provides irrigation water, flood mitigation, navigation and recreation, it has also critically impacted several fish species. The Corps of Engineers’ role is to operate this hydropower system in coordination with other producers to balance the needs of fish with other uses.

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Fish cameras at Bonneville Lock and Dam

Showing images from fish ladders on the Washington and Oregon sides of Bonneville Lock and Dam.

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Fish data

Results of daily adult fish counts at Bonneville, The Dalles, John Day, McNary, Ice Harbor, Lower Monumental, Little Goose and Lower Granite dams, accessible through dynamic queries.

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Willamette Valley Biological Opinion
On July 11, 2008, the U.S. Fish and Wildlife Service and NOAA Fisheries issued biological opinions to complete consultations with the U.S. Army Corps of Engineers, the Bonneville Power Administration and the Bureau of Reclamation on the impact of the Willamette Project on ESA-listed species in the Willamette River Basin. For more about Willamette Valley Project Biological Opinions, contact the Willamette Program Manager at 503-808-4766.

Environmental: DMM

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Sediment evaluation in support of dredging for navigation is an integral part of both private industry and Portland District's civil works.

Regional sediment evaluation resources are here, including existing sediment quality evaluation reports, regional and national manuals and contacts for the interagency Portland Sediment Evaluation Team.

Click here for the Dredged Material Management and the Portland Sediment Evaluation Team page.

Environmental: AEM

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The primary purpose is managing the channel improvement project to avoid or minimize negative impacts related to channel deepening of the lower Columbia River and estuary.

This process evaluates effectiveness of compliance measures, monitoring actions and research to ensure the impacts of project construction, operation and maintenance are no greater than described in the Biological Assessment / Opinion. 

Click here for the Adaptive Environmental Management page.