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
Dig Boil-Up Pool, 30 ft in diameter, 4 ft deep Rip veg rap w R -3 t ith ipr ons ap /ft 1 t with on /ft veg- Stable Rip veg rap w -3 t i ons th /ft Riprap with veg-1 ton/ft Double Boil-UP Pools. Osborne Hollow Cr. Near Binghamton, NY Planform View table S t Dig Boil-Up Pool, 35 ft in diameter, 4 ft deep eg v o 2 t s/f n Flow table ith ton/ft S 1 pw h vegit ra rap w p Ri
THE LANDOWNER BOO
Sev ere ero sio n Some erosion Osborne Hollow Cr. Near Binghamton, NY Planform View Stable Landow ner channel e ner leve Landow L a dredged are andowner table S Flow
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 (doubleboil-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
Sev ere ero sio n Some erosion Osborne Hollow Cr. Near Binghamton, NY Planform View Stable Landowner levee Landow ner channel Flow a dredged are Landowner ap Vegetated keys & ripr 7 te Highway Sta
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 Varies between 6 & 13 ft Pre-project profile view. Looking upstream State Hwy 7
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 & 11. 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 Using an available log held in the bucket of the trackhoe, willows are pulled streamward Log 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 cobblegravel 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 REST Q u e s t i o n s ?
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