8a Blue Carbon Flyer
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 The Port of Seattle, Maritime Division, is conducting a pilot project to 15th Ave W Lake Union Portage evaluate the ability to enhance blue carbon processes at Smith Cove: Terminal 91 CARBON SEQUESTRATION 5 Eelgrass, kelp and salt marsh vegetation sequester (or trap) dissolved Blue Elliot Ave W Carbon Broad St carbon at a significant rate as much as a ton of CO2 per acre annually. Pilot Project Denny Way The Smith Cove project is expected to sequester 10 tons of carbon every Downtown Seattle year, or the equivalent of over 1,000 gallons of gasoline combustion. Elliott Bay FISH AND WILDLIFE HABITAT In addition to sequestering carbon, eelgrass, kelp and salt marsh are the S. Dearborn most biologically productive habitats in Puget Sound, supporting a wide 90 variety of fish and wildlife species, including life stages of endangered The project site, which is 4th Ave Chinook salmon. between Pier 91, Elliott Bay Airport Way S Marina, and Smith Cove Park, Harbor Ave SW WATER QUALITY IMPROVEMENT includes all of the characteristics The project includes re-establishment of native oysters in Smith Cove, necessary for the project: with a goal to support over 1 million oysters. A single oyster siphons up to 2 gallons of water per hour, removing particulate matter and Protected from wave energy contaminants. Introduced shellfish would filter up to 50 million gallons of Appropriate depths Elliott Bay water per day. Suitable substrate No conflict with existing uses OCEAN ACIDIFICATION REFUGIA No overwater structures Acidification is one of the major threats facing Puget Sound. By removing Accessible for interpretation dissolved carbon from the water, kelp, eelgrass and salt marsh buffer and public education acidification, providing beneficial habitat for oysters and other pH- 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 OVERVIEW SMITH COVE "BLUE CARBON" PILOT PROJECT1,257,000 1,258,000 235,000 235,000 Step 1: Plant and install blue carbon Stormwater !( Stormwater Outfall Outfall Stormwater I !( 0 100 Outfall !( 200 300 400 4 2 Feet 1 inch = 125 feet when printed at 18" x 24" enhancements: 0 0 !( Intertidal Shellfish !( Stormwater !( (4.91 acres) Outfall !( -14 -2 -16 -10 -20 2 0 Kelp Future Smith Cove Park -6 !( Stormwater -20 -30 -8 Outfall Riparian vegetation !( Eelgrass -18 (> +12' MLLW) -28 -32 -32 -34 !( -36 -20 Shellfish beds -10 -22 -10 -8 -12 !( Existing Smith Cove Park !( 0 2 Stormwater -2 0 Stormwater -4 ( ! 2 -16 Riparian -12 -10 Outfall -10 0 -16 !( -14 !( Outfall -24 -20 -14 Intertidal salt marsh (0.63 acres) -2 Stormwater -24 -6 Outfall 4 -30 -34 -20 -40 -30 -28 -12 -36 -22 -8 -35 -26 -10 Shoreline/riparian vegetation* Marsh Plants -38 -2 -28 -38 !( -2 -40 -16 -26 -32 -20 -35 !( -30 -2 -8 -14 (+12' to +8' MLLW) -34 -18 -20 *Size/scope/schedule TBD 234,000 Shellfish beds -6 -40 -24 -16 -4 -10 !( -34 !( -10 234,000 -22 -36 !( -22 -12 -12 -35 (+1' to -5' MLLW) -35 -32 -36 -10 -18 -38 -32 Eelgrass -28 !( -30 -12 -35 -36 -32 -8 -8 -18 Step 2: Monitor project over time: (12.42 acres) -16 -24 -18 -40 -2 -36 -20 -28 -34 -2 -14 -38 -35 -40 -35 100' offset from dock -30 -36 -26 -10 -12 -6 -4 Water Chemistry (pH) -34 -38 -20 -14 -4 -36 -32 -38 -10 -4 -26 -10 -22 -30 -10 -30 -6 -16 -26 -8 -34 -16 Carbon sequestration -26 -34 -20 -8 -10 -34 -32 -16 -10 -38 -38 Eelgrass Beneficial habitat changes -36 Elliott Bay -12 -12 (-1' to -12' MLLW) -12 -14 -36 -40 -20 -18 Marina Pier 91 -14 -16 -38 -10 -14 -14 -32 -38 -30 -22 -10 -40 -16 -16 -36 -22 -40 !( -42 Step 3: Report results -28 -18 -12 -35 -28 -36 -38 -18 -22 -40 -18 -18 -28 -20 Canopy Kelp -22 -30 Buoy (7.03 acres) -36 -36 -30 -12 -20 -28 -32 233,000 -22 -40 -34 -36 -20 -16 -38 -42 -14 -22 -35 233,000 The blue carbon project team includes staff from Kelp -24 -30 -26 !( -38 -10 -42 (-12' to -24' MLLW) -24 Stormwater -42 -22 -35 -12 Outfall -42 -44 -20 -26 the Port, Puget Sound Restoration Fund, NOAA, -24 -40 -14 -32 -16 -38 -24 -22 -36 -42 -10 -35 -34 -10 -28 -10 -8 -44 -6 -22 -18 -40 City of Seattle, UW and Grette Associates. -26 -30 -14 -30 -14 -24 -42 -36 -28 -40 Date Saved: 9/20/2017 3:18:06 PM -18 -20 -8 Buoy -38 -22 -42 -30 -10 -30 Future blue carbon actions: -40 -42 -30 -12 -26 -40 -42 -32 -24 -36 -38 -28 -20 -34 Baseline surveys Eelgrass test plots Completed project Kelp substrate placement -10 -34 -36 -35 -35 Shoreline restoration (TBD) Document Name: Terminal 91 Bathymetry and Habitat Areas - 2017-09-20 Habitat Class -36 -36 -16 -40 -38 Project Boundary Port Facility Boundary -36 -36 -30 -42 !( Stormwater -38 Canopy Kelp -40 Outfall Park Area -40 -40 -20 (March-April 2018) (May-June 2018) design (October 2018) (December 2018)WA-DNR PMA Land Boundary -42 -44 Long term UW study (TBD) -30 -42 Eelgrass -12 -26 -32 -44 -35 -18 !( Stormwater Outfall Port Parcel Boundary -44 -24 -44 -46 -22 -44 -46 -28 -40 Intertidal Shellfish -42 -48 Interpretive signage (2019) Elliott Bay King County Parcel Boundary -46 -34 -46 -50 -50 -48 -42 -35 -50 Riparian -50 -52 -46 2018 -52 -44 -50 -48 2019 2020 -52 2021 -48 -52 -50 -44 -54 -54 -54 -52 -54 -56 -46 -46 -56 -58 -52 -48 Coordinate System: NAD 1983 StatePlane Washington North FIPS 4601 Feet 1,257,000 1,258,000 2022 Kelp test plots Install "blue carbon" features Growthand maturation Shellfish test plots (April-May 2018) (Jan-May 2019) (2020-2023) (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 using soy based ink. 04/2018
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