BANK EROSION PINS

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BANK EROSION PINS
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BANK EROSION PINSA simple, inexpensive
accurate way to precisely measure bank erosion
rates. Five foot long sections of ½ inch
diameter rebar is driven horizontally into the
toe, middle, upper sections of an eroding bank
until the river end of the rebar is flush with
the face of the bank. Over time the length of
rebar exposed shows the amount of erosion!!
Wooden stakes are usually labeled driven at 5
ft intervals (5 stakes) on top bank above the
rebar in case the rebar is washed away.
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Phil Balch in KS installing bank pins
The rebar is driven into the bank until the end
is flush with the face of the bank.
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Bank Erosion Rate Measurement using 5 ft long
rebar stakes _at_ 5 ft intervals on top bank
5 ft long sections of ½ inch diameter rebar is
driven into the toe, middle, upper bank until
the rebar is flush with the face of the bank.
Thalweg trace
20 ft
5 ft long rebar
Stakes
Mark stakes with distance from edge of bank (5
ft, 10 ft, 15 ft, etc.), then measure back from
edge of bank drive stakes into ground at 5 ft
intervals
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Pins were originally installed flush with
streambank surface
Bank erosion pins
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Travelute Site, Little Blue River, KS.
Stake was placed 25 ft from breaking edge of top
bank one month ago
21 ft of lateral migration in one month!
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This PowerPoint presentation was developed
built by Dave Derrick. Any questions or
comments, call my personal cell _at_ 601-218-7717,
or email _at_ d_derrick_at_r2d-eng.comEnjoy the
information!!
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CLEOPHUS SPEED ELVIS DERRICK, WITH FRIENDS