CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-12-2009
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Transcript of CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-12-2009
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Soil-choked Riprap covered with Erosion
Control Blanket (ECB), & planted with native
trees & shrubs through the ECB
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Riprap to top bank was soil-choked, seeded, covered with a 100% coir 700 grams/ sq. meter series Erosion Control Blanket
(ECB), & five species of container native trees & shrubs planted
through the ECB. Toe protection was LPSTP and Single Stone
Bendway Weirs.
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Cutting coir blanket to length plus close-up. This is a 700 series (700 grams per sq. meter blanket. Heavy& tough. Traps soil & seed well,
sticks in dirt when wet, open weave, can be reseeded if needed
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-12-2009
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SITE 2-B: BANK STABILIZATION TO PROTECT A COUNTY OWNED
HIGHWAY, BUSHKILL, PA.DELAWARE WATER GAP
NATIONAL RECREATION AREA NATIONAL PARK SERVICE PROJECT CONSTRUCTED
SEPTEMBER 19-22, 2009
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PROBLEMS A severe attack angle caused by planform geometry
& a transverse bar that directs the flow of Bushkill Creek into the left descending bank just downstream of Site 2-A had eroded the left descending bank dangerously close to a county-maintained two lane highway. The project is 255 ft long. In places the stream was within 15 ft of the road. The bank was steep in this area with the high velocity thalweg immediately at the toe. In some areas a single row of mature trees attempted to hold the bank together, in other areas trees were absence or dead.
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Aerial view of project area with
work limits delineated.
Courtesy of Ecological Restoration, Inc
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PRE-PROJECT PHOTOS by Dave Derrick Dec. 16, 2008
(HIGH WATER) & Sept 9, 2009
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HIGH WATER-Looking DS @ flow attack into Site 2-B.
PRE-PROJECT BUSHKILL CR-SITE 2-B PIX BY DERRICK 12-16-2008
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Looking DS @ left bank (entire length of project)
PRE-PROJECT BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-9-2009
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Looking DS @ left bank. Flow into upper end of project
PRE-PROJECT BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-9-2009
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THE PLAN
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SOLUTIONS (THE PLAN) The upstream section has 210 ft of Longitudinal Peaked
Stone Toe Protection (LPSTP), applied at a rate of 2 tons/ft as a resistive toe protection. Vines were planted to cover the LPSTP stone. Keyed into the LPSTP are 9 Single or Double Stone Bendway Weirs, spaced approx. 30 ft apart. The downstream 45 ft of the project has two Bendway Weirs & 7 Traffic Control Stones. Four keys anchor the entire project, with two keys designed as stairs for fisherman access. Above the entire length of LPSTP is a row of willow & dogwood poles (brush layer). The upstream 85 ft has riprap applied up to top bank, then soil-choked & encapsulated with a 100% coir, 700 grams/sq. meter Erosion Control Blanket (ECB). Five species of trees and shrubs were planted through the ECB. The downstream 125 ft of LPSTP has the single brush layer & about 2 ft of ECB encapsulated earth, with the mid & upper bank sloped & planted with dozens of rooted-stock trees & shrubs.
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Courtesy of Ecological Restoration, Inc.
Soil-choked & planted riprap to top bank in pink area-85 ft wide
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Courtesy of Ecological Restoration, Inc.
This is typical protection US & DS of the Soil-choked
Riprap protection
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Cottonwood 30 in tree bands (small pots)
Sycamore 10 2 gallon fiber pots Silver Maple 10 2 gallon pots Red Oak 10 3 gallon pots Silky Dogwood 500 bare root Black Willow 250 bare root Ninebark 233 bare root Virginia Creeper 52 cuttings Rhododendron 25 3 gallon pots
PLANTS PLANTED Common Name # Size
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CONSTRUCTION PHOTOS
by Dave Derrick, September 22, 2009
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Looking US @ large stone for Single & Double Stone Bendway Weirs. No room for construction!
CONSTRUCTION BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-22-2009
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Looking US @ completed LPSTP toe protection near DS end. Valuable trees untouched. Single Stone Bendway Weir
CONSTRUCTION BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-22-2009
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Looking US @ thalweg controlled by Bendway Weirs, note dead water near bank.
CONSTRUCTION BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-22-2009
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The local county road supervisor was worried that the section of bank that was impacted
the most by flow would erode (upper section of project), so in response to his concerns, a
blanket of riprap 85 ft wide was applied up to top bank (riprap applied above the LPSTP). Riprap was soil-choked, covered with a 100%
coir 700 grams/ sq. meter series Erosion Control Blanket (ECB), & five species of container native trees & shrubs planted
through the ECB
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Bushkill Creek, Delaware Water Gap, PA
FIL
L
CUT
Slope bank. A balanced cut/fill in all sections. Backfill
anchors the ECB at toe.
Bendway Weir LPSTP
Live Siltation
Erosion Control Blanket
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85 ft wide blanket of riprap applied from LPSTP & Live
Siltation up to top of bank.
Bushkill Creek, Delaware Water Gap, PA
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Soil-choke riprap to top of bank.
Bushkill Creek, Delaware Water Gap, PA
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Seed all soil-choke soil.
Bushkill Creek, Delaware Water Gap, PA
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Riprap to top bank, then soil-choked. Leah is spreading grass seed. The local road super was worried about the
impact zone eroding, so riprap to top bank.
CONSTRUCTION BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-22-2009
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Bushkill Creek, Delaware Water Gap, PA
Install Erosion Control Blanket, dig key at top bank
to anchor ECB
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Looking US. Upper end of ECB tucked into key trench.
CONSTRUCTION BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-22-2009
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Looking US. Backfilling the uphill ECB anchor trench
CONSTRUCTION BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-22-2009
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Looking US. Backfilling the uphill ECB anchor trench
CONSTRUCTION BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-22-2009
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Bushkill Creek, Delaware Water Gap, PA
Install rooted stock plants through ECB as appropriate
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PROJECT COMPLET
E
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CONSTRUCTION COMPLETE
Photos by Derrick SEPT. 25, 2009
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CONSTRUCTION COMPLETE-Looking downhill @ the soil-choked riprap with Erosion Control Blanket cover & rooted plants
CONSTRUCTION BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-25-2009
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CONSTRUCTION COMPLETE-Looking at the ECB uphill key. ECB was trenched in, then backfilled with soil & stone.
CONSTRUCTION BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-25-2009
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CONSTRUCTION COMPLETE-Looking DS @ flow into Site 2-B. Upstream key & US end of project. Riprap area is covered by the tan Erosion Control Blanket.
CONSTRUCTION BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-25-2009
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CONSTRUCTION COMPLETE-LPSTP with Live Siltation, Single-Stone Bendway Weirs, ECB with riprap to top bank
with soil-choke & tree & shrub rooted-stock plantings
CONSTRUCTION BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-25-2009
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CONSTRUCTION COMPLETE-LPSTP with Live Siltation, Single-Stone Bendway Weirs, ECB with riprap to top bank
with soil-choke & tree & shrub rooted-stock plantings. Note dead water near bank due to Bendway Weirs
CONSTRUCTION BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-25-2009
Soil-Choked Riprap
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CONSTRUCTION COMPLETE-Looking @ the DS half of the project
CONSTRUCTION BUSHKILL CR-SITE 2-B PIX BY DERRICK 9-25-2009
Soil-Choked Riprap
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1 YEAR AFTER PROJECT
COMPLETION Photos by
Dave DerrickSEPT. 12, 2010
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1 YEAR LATER-Looking DS @ mid-project area. LPSTP, Bendway Weirs, Soil-Choked Riprap & many plantings
1 YEAR LATER-BUSHKILL CR-SITE 2-B - DERRICK 9-12-2010
Soil-Choked Riprap
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1 YEAR LATER-Looking US @ the transverse bar directing flow into the formerly eroding bank. Riprap with
soil choke encapsulated with ECB with plantings.
1 YEAR LATER-BUSHKILL CR-SITE 2-B - DERRICK 9-12-2010
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1 YEAR LATER-Looking @ section covered by full bank riprap, then soiled, seeded, & covered by Erosion Control Blanket (ECB)
1 YEAR LATER-BUSHKILL CR-SITE 2-B - DERRICK 9-12-2010
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14 MONTHS AFTER PROJECT
COMPLETIONHIGH WATERPhotos by Derrick
Nov. 4, 2010
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FROM UPSTREAM
TO DOWNSTREAM
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HIGH WATER-Looking @ the US end of Site 2-B. Soil-choked riprap. Water is redirected by the transverse bar toward the project (US arrows),
but then redirected again by the Bendway Weirs (SSBW), DS arrow.
14 MONTHS LATER-BUSHKILL CR-SITE 2-B - DERRICK 11-4-2010
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HIGH WATER-All of the bank in this picture is rip rapped to top bank, soil-choked, seeded, & covered with a 700 series, 100% coir, 100%
degradable, Erosion Control Blanket then container plants were installed.
14 MONTHS LATER-BUSHKILL CR-SITE 2-B - DERRICK 11-4-2010
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HIGH WATER-Close-up looking @ soil-choked riprap with Erosion Control Blanket & plantings.
14 MONTHS LATER-BUSHKILL CR-SITE 2-B - DERRICK 11-4-2010
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HIGH WATER-Close-up looking @ soil-choked riprap with Erosion Control Blanket & plantings.
14 MONTHS LATER-BUSHKILL CR-SITE 2-B - DERRICK 11-4-2010
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PEYTON & CLEOPHUS READY TO DO SOME
COLD WEATHER MOWING