Blue Carbon Pilot Program Fact Sheet
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SUSTAINABILITY BLUE CARBON PILOT PROJECT Blue carbon refers to carbon captured in ocean and nearshore environments, assimilated as biomass and stored in marine sediments. Blue carbon process are critical to concerns for acidification of marine areas due to increases in atmospheric CO2. In Puget Sound, kelp, eelgrass, shellfish, and salt marsh are important elements in blue carbon processes, ensuring productive, resilient and carbon-rich marine conditions. Bay Portage 15th Ave W 15th Ave The Port of Seattle, Maritime Division, is conducting a pilot project to Union Lake Terminal 91 evaluate the ability to enhance blue carbon processes at Smith Cove: 5 Elliot Ave W CARBON SEQUESTRATION Blue Carbon Aquatic Habitat Project Eelgrass, kelp and salt marsh vegetation sequester (or trap) dissolved Broad St Denny Way carbon at a significant rate – as much as a ton of CO2 per acre annually. Downtown The Smith Cove project is expected to sequester 10 tons of carbon every Seattle year, or the equivalent of over 1,000 gallons of gasoline combustion. Elliott Bay FISH AND WILDLIFE HABITAT S. Dearborn In addition to sequestering carbon, eelgrass, kelp and salt marsh are the 90 4th Ave most biologically productive habitats in Puget Sound, supporting a wide The project site, which is S Airport Way variety of fish and wildlife species, including life stages of endangered Harbor Ave SW between Pier 91, Elliott Bay Chinook salmon. Marina, and Smith Cove Park, WATER QUALITY IMPROVEMENT includes all of the physical The project includes re-establishment of native oysters in Smith Cove, with characteristics necessary for a goal to support over 1 million oysters. A single oyster siphons up to 2 the project: gallons of water per hour, removing particulate matter and contaminants. • Protected from wave energy Introduced shellfish would filter up to 50 million gallons of Elliott Bay • Appropriate depths and water per day. substrate • Does not adversely affect OCEAN ACIDIFICATION REFUGIA Acidification is one of the major threats facing Puget Sound. By removing adjacent uses dissolved carbon from the water, kelp, eelgrass and salt marsh buffer • Highly visible demonstration acidification, providing beneficial habitat for oysters and other pH site sensitive species. www.portseattle.org WAVE/CURRENT ATTENUATION As sea level rises and storms intensify, our shorelines are becoming increasingly prone to erosion. Kelp, eelgrass, shellfish beds, salt marsh and riparian vegetation play an important role in stabilizing the shoreline,dissipating energy, and storing sediments. SUSTAINABILITY The project does not include structures or other components which require maintenance; if successful, it will be self-sustaining. The project also includes the potential for harvesting shellfish biomass to create marine-based organic compost for use in the Port’s shoreline parks and riparian habitats, helping to maintain their “Salmon-Safe” certification. PROJECT OVER VIEW SMITH COVE “BLUE CARBON” PILOT PROJECT I Step 1: Plant and install blue carbon 0 100 200 300 Feet Future Smith enhancements: Cove Park • Kelp Riparian Riparian vegetation (0.6 acres) • Eelgrass (> +12’ MLLW) Existing Smith Cove Park • Shellfish beds Intertidal Shellfish • Intertidal salt marsh (4.4 acres) • Shoreline/riparian vegetation* Marsh Plants (+12’ to +8’ MLLW) * Size/sope/scheduel TBD Shellfish beds (+1’ to -5’ MLLW) Eelgrass Step 2: Monitor project over time: (12.5 acres) • Water Chemistry (pH) • Carbon stock • Habitat value Eelgrass Elliott Bay (-1’ to -12’ MLLW) Marina Pier 91 Step 3: Report results Canopy Kelp Buoy The blue carbon project team includes staff from (7.1 acres) the Port, Puget Sound Restoration Fund, NOAA, Kelp (-12’ to -24’ MLLW) WDNR, UW and Grette Associates. Future Blue CarbonCoordinate Sys teProjectsm: NAD 1983 StatePlane Washington North FIPS 4601 Feet Baseline surveys Eelgrass test plots Completed project Kelp substrate placement Shoreline restoration (TBD) (March-April 2018) (May-June 2018) design (October 2018) (December 2018) Long term UW study (TBD) Interpretive signage (2019) 2018 2019 2020 2021 2022 Install “blue carbon” Growth and maturation Kelp test plots Shellfish test plots features (Jan-May 2019) (2020-2023) (April-May 2018) (July-August 2018) Email and Text Updates Port of Seattle Sign up for updates at our web page P.O. Box 1209 www.portseattle.org/subscribe Seattle, WA 98111 www.portseattle.org #bluecarbon Printed on recycled paper 09/2018.