Balancing Benefits and Impacts When Using a Nearshore Dredged Material Placement Site at the Mouth of the Columbia River

Norton, J.H.; Moritz, Rod; Ott, Michael; Briner, Wendy; Roegner, Curtis

doi:10.1142/9789814689977_0147

Cited by 5 publications

(10 citation statements)

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“…A deeper open-water TLP project in Oregon at the mouth of the Columbia River (40 to 55 ft [12.2 to 16.8 m]) provided supplementary sediment to support existing infrastructure to address littoral sediment needs. By placing sediments with a hopper dredge, scour was reduced along jetties and potential negative impacts were avoided, including impacts to navigation safety due to mound elevations and the smothering of biological resources such as fish and crabs (Norton et al 2015).…”

Section: Tlp Definitionmentioning

confidence: 99%

“…Portland State University to bring all interested parties together. The Lower Columbia Solutions Group (LCSG) was subsequently created in 2004 to give all parties a voice and to streamline the environmental permitting process by including state and federal regulators (Norton et al 2015). That the LCSG was able to work through the stakeholders' concerns and pave the way for a DM placement pilot project in September 2005 clearly shows the value of early stakeholder engagement.…”

Section: Usace-portland District First Engaged With the National Poli...mentioning

confidence: 99%

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Guidelines for how to approach thin layer placement projects

Piercy,

Welp,

Mohan

2023

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Historically, dredged material (DM) has been placed at the nearest available placement site. There has been an increasing trend of beneficial use projects recently, often using innovative methods. Thin layer placement (TLP) involves one- to two-foot-thick DM placement, compared to traditional, thicker sediment placement applications, to restore coastal wetlands. The main idea of TLP is to promote the natural recolonization or reestablishment of habitat and benthic species. This guidance presents a roadmap of TLP’s evolution and offers easily digestible examples and considerations for TLP applications in wetlands and open-water environments. Offered as a tool to the practitioner, the eight chapters of this guidance covers the history of TLP, characterization of the project area, setting goals and objectives, project design, construction considerations, monitoring and adaptive management, knowledge gaps, and future research needs. Several case studies are presented as examples of how such applications have been implemented and highlight lessons learned, particularly best-management practices. This guidance offers consideration of TLP as a critical component in the project development phase, a tool for the sustainable management of DM, and a method that may create, maintain, enhance, or restore ecological function while supporting navigation channel infrastructure and providing flood risk management benefits.

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Section: Tlp Definitionmentioning

confidence: 99%

Section: Usace-portland District First Engaged With the National Poli...mentioning

confidence: 99%

Guidelines for how to approach thin layer placement projects

Piercy,

Welp,

Mohan

2023

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show abstract

“…Other projects prefer for the placement to be placed as a thin layer, such as at the mouth of the Columbia River, OR (MCR) (Norton et al 2018), and Mobile Bay, AL (Parson et al 2015). Hopper dredges are ideal vessels for thin layer placement.…”

Section: Hydrodynamic Conditions and Expected Sediment Transport Directionmentioning

confidence: 99%

Metrics of Success for Nearshore Nourishment Projects Constructed with Dredged Sediment

McFall¹,

Krafft²,

McCaw³

et al. 2021

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“…ERDC researchers from the Environmental Laboratory presented a variety of approaches to evaluate ecological considerations relevant to nearshore placements and knowledge gaps for future research. The presentation also highlighted case studies on thin layer placements in Mobile Bay (Parson et al 2015) and the Mouth of the Columbia River (Norton et al 2015) including novel monitoring methods designed to overcome concerns regarding ecological resource impacts. Approaches to ecological assessment for nearshore placements included the Mediated Modeling approach (Herman et al 2019), the Toolkit for interActive Modeling 1 , the Southern California Coastal Bay Ecosystem Habitat Model 2 , and the Ecological Data Synthesis Tool.…”

Section: Ecological Considerationsmentioning

confidence: 99%

Nearshore Placement Workshop 2019 : sediment nourishment of the nearshore environment

Krafft¹,

Young²,

Brutsche³

et al. 2020

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The Coastal Inlets Research Program and the Regional Sediment Management Program co-sponsored the 2019 Nearshore Placement Workshop. Thirty-four participants from the US Army Engineer Research and Development Center (ERDC) and numerous districts met in Vicksburg on January 29-30, 2019, as a part of the workshop. This workshop was convened to facilitate discussions on concerns districts face regarding nearshore placements from resource agencies and stakeholders, challenges to placing sediment in the nearshore, and future research needs. The workshop included ERDC presentations on the state of the science regarding nearshore placements; specific implementations of nearshore placements within various US Army Corps of Engineers districts; break-out-style discussions on nearshore placement challenges and potential paths forward; and group discussions on metrics for success, quantification of benefits, Statements of Need (SON), and research priorities. A few of the major recurring themes throughout the workshop were the importance of monitoring, concerns over the fate of fine-grained sediment, and difficulties conveying the benefits of nearshore placements to a wide range of audiences. The workshop culminated in a discussion of possible SON to be put forth to the ERDC research and development community. This special report describes the discussions and outcomes of the 2019 Nearshore Placement Workshop. DISCLAIMER: The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. All product names and trademarks cited are the property of their respective owners. The findings of this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents.

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Balancing Benefits and Impacts When Using a Nearshore Dredged Material Placement Site at the Mouth of the Columbia River

Cited by 5 publications

References 0 publications

Guidelines for how to approach thin layer placement projects

Guidelines for how to approach thin layer placement projects

Metrics of Success for Nearshore Nourishment Projects Constructed with Dredged Sediment

Nearshore Placement Workshop 2019 : sediment nourishment of the nearshore environment

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