Presentation Abstract
The City of Seattle is completing the replacement of the Elliott Bay Seawall along its downtown urban waterfront that included the installation of numerous unique features to enhance the nearshore marine shoreline for salmon migration and to improve nearshore productivity and the food web. The urbanized waterfront is constrained by numerous large piers that shade the nearshore and adjacent deep water from a historical legacy of filling in the nearshore. Key issues addressed by the project included improving natural lighting behind and under several large piers and providing an intertidal habitat corridor along the shoreline. This presentation will describe the unique habitat features that were installed, the enhancement objectives and thresholds for success, and the results of monitoring in 2018 specific to macroalgae and invertebrate colonization and the physical stability of the installed habitat features. Initial results will be compared to pre-construction conditions with lessons learned about the effectiveness, to date, of these unique features. Monitoring will be continuing through at least 2022 and a summary of additional work will be provided. This presentation complements presentations by the University of Washington on the results of salmon migration and lighting.
Session Title
Track: Shorelines, Estuaries & Rivers – Posters
Conference Track
Shorelines, Estuaries & Rivers
Conference Name
Salish Sea Ecosystem Conference (2020 : Online)
Document Type
Event
SSEC Identifier
2020_abstractID_5101
Start Date
21-4-2020 9:00 AM
End Date
22-4-2020 4:45 PM
Genre/Form
conference proceedings; presentations (communicative events)
Subjects – Topical (LCSH)
Marine mammals--Effect of human beings on--Washington (State)--Elliott Bay; Waterfronts--Washington (State)--Elliott Bay; Sea-walls--Design and construction--Environmental aspects--Washington (State)--Elliott Bay
Geographic Coverage
Salish Sea (B.C. and Wash.); Elliott Bay (Wash.)
Rights
Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this document for commercial purposes, or for financial gain, shall not be allowed without the author's written permission.
Type
Text
Language
English
Format
application/pdf
Included in
Fresh Water Studies Commons, Marine Biology Commons, Natural Resources and Conservation Commons, Terrestrial and Aquatic Ecology Commons
Elliott Bay Seawall Habitat Features -- Initial Monitoring Results for Nearshore Ecosystem
The City of Seattle is completing the replacement of the Elliott Bay Seawall along its downtown urban waterfront that included the installation of numerous unique features to enhance the nearshore marine shoreline for salmon migration and to improve nearshore productivity and the food web. The urbanized waterfront is constrained by numerous large piers that shade the nearshore and adjacent deep water from a historical legacy of filling in the nearshore. Key issues addressed by the project included improving natural lighting behind and under several large piers and providing an intertidal habitat corridor along the shoreline. This presentation will describe the unique habitat features that were installed, the enhancement objectives and thresholds for success, and the results of monitoring in 2018 specific to macroalgae and invertebrate colonization and the physical stability of the installed habitat features. Initial results will be compared to pre-construction conditions with lessons learned about the effectiveness, to date, of these unique features. Monitoring will be continuing through at least 2022 and a summary of additional work will be provided. This presentation complements presentations by the University of Washington on the results of salmon migration and lighting.
