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Project Design: Buck
Engineering
Primary Contractor: Byers
Construction
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WOOD
(March 2002)
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The Wood project is
situated along Brasstown Creek immediately downstream of the Warne
project site on land owned by John Wood.
Conditions of Site Prior to Project
The Wood reach of
Brasstown Creek, which is 400 feet in length, lacked an established
riparian buffer and had become overly wide. Stream bank erosion was
highest along the right bank. The average rate of erosion along the
site was estimated at 386lb/ft/yr (130 tons per year).
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Before
Before
restoration work began, the stream’s energy and a lack of
streamside vegetation resulted in significant streambank
erosion and loss of land.
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After
A rock
structure called a cross-vein was installed in Brasstown
Creek to direct the stream’s energy back into the center of
the channel and trees were planted on the streambanks. You
can see the bank being re-built by the stream behind the
“arm” of this structure. |
Instream Technologies Applied
Streambank and
channel restoration techniques were determined following natural channel
design methodologies as proposed by Rosgen. Procedures included the
installation of a double wing deflector, removal of a mid-channel bar,
installation of a cross vane and J-hook, and the construction of a bank
full bench all as described in the Project Design section above. Root
wads were also placed in the right bank at the lower end of the reach to
protect the stream bank.
Linear Feet of Stream Restoration
400
feet
Linear Feet of Riparian Buffer Restored and/or Protected
800
feet
Buffer Vegetation
Native trees and
shrubs were used to restore
a
50ft-wide
riparian buffer on
Mr. Wood’s side of the stream. Bare root vegetation was planted along
the streambank. Potted shrubs and wetland species were planted along
the streambank above bankfull elevation. Live stakes were used on
critical slopes.
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