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Duck Creek Water Quality and Anadromous Fish Habitat Restoration
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NOAA Restoration Center
Community-Based Restoration Program
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Duck Creek Restoration
Duck Creek Restoration
Duck Creek, a surface water body in Alaska, is impaired by urban runoff from non-point source pollutants including, heavy metals, hydrocarbons, iron flocs and excess nutrients. This small coastal stream originates from a spring that drains runoff from Mendanhall Valley, a relatively high residential and business area. Historically there were runs of nearly 10,000 chum salmon and Coho runs of about 500 fish in Duck Creek. Currently the chum run is extinct and the Coho run consists of only 20 fish. Restoration at Duck Creek involves the development and implementation of bioremediation methods to restore water quality and anadromous fish habitat in impaired streams. NOAA scientists attempted to correct the degraded conditions by using high-pressure jet pumps and suction dredges to remove fine sediment from the streambed. Researchers also added natural structures to direct stream flow and increase oxygen levels. The removal or replacement of perched culverts that impair fish habitat will also take place to reduce flood hazards. This project demonstrates the benefits of restoration and the importance of aquatic habitat protection in maintaining healthy aquatic ecosystems.
Duck Creek Water Quality and Anadromous Fish Habitat Restoration
Duck Creek Water Quality and Anadromous Fish Habitat
Restoration
A close-up of the sediment sampling process.
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(1.37 MB)
An excellent close-up of the suction dredge process where water and sedimentsare passing through the screen.
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(1.28 MB)
A view of the entire pumping and dredging operation used at Duck Creek.
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(1.53 MB)
Another image of the suction and dredging machinery used at DuckCreek.
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(1.5 MB)
Sediments are being pumped onto the screen and filtered into totes below.
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(1.48 MB)
A close-up of the pumping and filtering process.
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(1.37 MB)
An overview of the pumping and filtering process.
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(1.38 MB)
Larger cobbles of gravel are trapped in the screening process as they arepumped onto the screen from the riverbed.
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(1.45 MB)
Water and sediment jets through the screen as it is pumped from the riverbed.
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(1.45 MB)
Two men work the pumps at the Duck Creek restoration site.
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(1.51 MB)
An overview of the pumping and dredging operation, the modified gold digger ison wheels in the background.
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(1.56 MB)
A man works at the dredging process.
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(1.54 MB)
A pond on Duck Creek
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(1.57 MB)
Americorp volunteers manually sort sand and gravel using shovels.
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(1.61 MB)
Water quality monitoring
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(1.53 MB)
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