Post on 12-Jan-2016
OSBORNE HOLLOW CREEK
ROAD PROTECTION PROJECT
Gravel-Cobble Bed Stream – Rural, Pool-Riffle-Pool, Stream Slope 2-3% Goals: Halt bank erosion to protect NY State Highway 7, & Widen Road
Shoulder
Solution: Install Deeply-Keyed (weighted toe) Vegetated Riprap
Let’s think this thing through!!!!
OSBORNE HOLLOW CR. – DEC 12, 2006
THE FIRST PLAN
Double Boil-UP Pools-Osborne Hollow Cr.-
Near Binghamton, NYPlanform View
Flow
Stable
Riprap with veg-1 ton/ft
Rip
rap
with
ve
g-3
tons
/ft
StableStable
Rip
rap
with
veg-
3 to
ns/ft
Riprap with veg-1 ton/ft
Dig Boil-Up Pool, 35 ft in diameter, 4 ft
deep
Dig Boil-Up Pool, 30 ft in diameter, 4 ft
deep
Riprap with veg-2 to
ns/ft
Rip
rap
with
veg-
1 to
n/ft
THE LANDOWNER
BOO BOO
Osborne Hollow Cr.-Near Binghamton, NY
Planform View
FlowLandowner channel
StableStable Seve
re e
rosi
onSome erosion
Landowner levee
Landowner dredged area
Looking US at landowner dug channel in stream.
OSBORNE HOLLOW CR. – JUNE 24, 2007 - PIX BY DERRICK
Looking DS at landowner cutoff channel & levee
OSBORNE HOLLOW CR. – JUNE 24, 2007 - PIX BY DERRICK
Looking US from within landowner
cutoff channel. Note steep slope of bottom
of dug trench.
OSBORNE HOLLOW CR. – JUNE 24, 2007 -
PIX BY DERRICK
Landowner cutoff channel is aimed at his house, which is 35 ft from top bank!!
OSBORNE HOLLOW CR. – JUNE 24, 2007 - PIX BY DERRICK
Looking US. Headcuts migrating US thru the landowner cutoff channel.
OSBORNE HOLLOW CR. – DEC 20, 2007 - PIX BY DERRICK
During our in-field meeting with the landowner, he felt his channel aimed at his house will work, so we decided
to abandon our first plan (double-boil-up pool) & go with a pure road
protection scheme. We will not touch the landowner’s work, in fact we photo-documented the site pre-
& post project construction
THE SECOND
PLAN VEGETATED KEYS &
RIPRAP
Osborne Hollow Cr.-Near Binghamton, NY
Planform View
FlowLandowner channel
Stable
Stable Seve
re e
rosi
on
Some erosion
Landowner levee
Landowner dredged area
State Highway 7Vegetated keys & riprap
Looking DS. White painted line will be toe trench for riprap
OSBORNE HOLLOW CR. – JUNE 24, 2007 - PIX BY DERRICK
Gravel-Cobble Bed Stream–Install Soil-Choked Vegetated (Single-Row Bent Willow
Pole) Weighted-Toe Full-Bank Height Riprap
Pre-project profile view. Looking upstream
State Hwy 7
Varies between 6 & 13 ft
Let the actual construction
begin !!!! June 25, 2007
Looking DS at toe-down trench for riprap
OSBORNE HOLLOW CR. – JUNE 25, 2007 - PIX BY DERRICK
Looking US at toe-down trench for riprap
OSBORNE HOLLOW CR. – JUNE 25, 2007 - PIX BY DERRICK
Gravel-Cobble Bed Stream–Install Soil-Choked Vegetated (Single-Row Bent Willow
Pole) Weighted-Toe Full-Bank Height Riprap
Weighted toe trench dug 5 ft down & 4 ft wide
State Hwy 7
Gravel-Cobble Bed Stream–Install Soil-Choked Vegetated (Single-Row Bent Willow
Pole) Weighted-Toe Full-Bank Height Riprap
Bedload cobble-gravel used as fill material to provide a 2 on 1 slope
State Hwy 7
700 STREAMCO WILLOW PLANTS WERE HARVESTED
BY NYS-DOT PERSONNEL FROM THE NRCS PLANT MATERIAL CENTER, BIG
FLATS, NY. AVERAGE PLANT SIZE WAS 12-15 FT LONG & 1-
1.5 INCH BUTT DIAMETER
Gravel-Cobble Bed Stream–Install Soil-Choked Vegetated (Single-Row Bent Willow
Pole) Weighted-Toe Full-Bank Height Riprap
12-16 ft long Streamco Willow placed @ a density of 5 stems/ft
State Hwy 7
Looking US. Placing streamco willow in toe-down trench
OSBORNE HOLLOW CR. – JUNE 26, 2007 - PIX BY DERRICK
Looking US. Installing a thick layer of willow & toe stone.
OSBORNE HOLLOW CR. – JUNE 26, 2007 - PIX BY DERRICK
Gravel-Cobble Bed Stream–Install Soil-Choked Vegetated (Single-Row Bent Willow
Pole) Weighted-Toe Full-Bank Height Riprap
Trench & bank toe area filled with DOT graded
“Heavy” riprap
State Hwy 7
Looking US. Filling toe-down trench with DOT heavy stone
OSBORNE HOLLOW CR. – JUNE 26, 2007 - PIX BY DERRICK
Looking DS. Willows in place, setting riprap toe stone
OSBORNE HOLLOW CR. – JUNE 26, 2007 - PIX BY DERRICK
Looking US. Weighted-toe trench almost filled with stone.
OSBORNE HOLLOW CR. – JUNE 26, 2007 - PIX BY DERRICK
THE “SINGLE ROW” BENT WILLOW POLE METHOD
Willow placed at a density of 5 stems/ft.
Gravel-Cobble Bed Stream–Install Soil-Choked Vegetated (Single-Row Bent Willow
Pole) Weighted-Toe Full-Bank Height Riprap
Log
Using an available log held in the bucket of the
trackhoe, willows are pulled streamward
State Hwy 7
A long 2 by 4 was used to bend willows away from the bank.
OSBORNE HOLLOW CR. – JUNE 26, 2007 - PIX BY DERRICK
Stone was then placed from above onto the upper section of the bank.
OSBORNE HOLLOW CR. – JUNE 26, 2007 - PIX BY DERRICK
Gravel-Cobble Bed Stream–Install Soil-Choked Vegetated (Single-Row Bent Willow
Pole) Weighted-Toe Full-Bank Height Riprap
Using the front end loader, riprap is placed on mid & upper bank areas {landward of the
willows}
State Hwy 7
Placing stone on mid & upper sections of bank.
OSBORNE HOLLOW CR. – JUNE 26, 2007 - PIX BY DERRICK
Gravel-Cobble Bed Stream–Install Soil-Choked Vegetated (Single-Row Bent Willow
Pole) Weighted-Toe Full-Bank Height Riprap
Bedload cobble-gravel is used to choke all riprap.
This resulted in a 2 to 3 ft wider road
shoulder.
State Hwy 7
Stone is then “choked” with bed material from stream, then compacted.
OSBORNE HOLLOW CR. – JUNE 26, 2007 - PIX BY DERRICK
Looking US. Stone & choke material results in a wider highway shoulder.
OSBORNE HOLLOW CR. – JUNE 26, 2007 - PIX BY DERRICK
Gravel-Cobble Bed Stream–Install Soil-Choked Vegetated (Single-Row Bent Willow
Pole) Weighted-Toe Full-Bank Height Riprap
Seed or hydroseed all
disturbed areas
State Hwy 7
THE US KEY IS A STONE KEY WITH DEEPLY
PLANTED VEGETATION
Looking US. Placing DOT graded “heavy” stone in US key
OSBORNE HOLLOW CR. – JUNE 26, 2007 - PIX BY DERRICK
Looking DS at US key. Note angle of key to stream.
OSBORNE HOLLOW CR. – JUNE 27, 2007 - PIX BY DERRICK
Looking DS at US key.
OSBORNE HOLLOW CR. – JUNE 27, 2007 - PIX BY DERRICK
Looking DS at US key. Key construction is complete.
OSBORNE HOLLOW CR. – JUNE 27, 2007 - PIX BY DERRICK
WHAT HAPPENS OVER TIME ??? 5
MONTHS LATER
Looking US at willow & stone protection by the road.
OSBORNE HOLLOW CR. – DEC 20, 2007 - PIX BY DERRICK
Looking US at willow & stone protection.
OSBORNE HOLLOW CR. – DEC 20, 2007 - PIX BY DERRICK
Looking US at stream & road.
OSBORNE HOLLOW CR. – DEC 20, 2007 - PIX BY DERRICK
CLEOPHUS SPEED ELVIS DERRICK, AT RESTQuestions?