DINGMANS CREEK, SITE 4, SMALL SLIDE, DELAWARE WATER GAP PROJECT VEGETATED KEYS; TRAFFIC CONTROL...

DINGMANS CREEK, SITE 4, SMALL SLIDE, DELAWARE

WATER GAP PROJECT VEGETATED KEYS; TRAFFIC

CONTROL STONES; PLANTINGS; SINGLE STONE

BENDWAY WEIRS; & A RANDOM BOULDER FIELD

FOR ROUGHNESS & AQUATIC HABITAT

PRE-PROJECT PHOTOS

by Dave Derrick

Dec. 15, 2008 (HIGH WATER)

LEAF OFF CONDITION

HIGH WATER-Looking US @ project bank. Stream is obviously eroding this bank, which contributes significant sediment to the system

PRE-PROJECT DINGMANS CR-SITE 4 PIX BY DERRICK 12-15-2008

HIGH WATER-Looking DS toward DS end of project.

PRE-PROJECT DINGMANS CR-SITE 4 PIX BY DERRICK 12-15-2008

THE PLAN

Courtesy of Ecological

Restoration, Inc.

Correction: There should be 3 Traffic

Control Stones between each Single Stone

Bendway Weir, not 2.

Courtesy of Ecological Restoration, Inc.

SSBWTCS

Key

PLANTS PLANTED

Gray Birch 50 2 gallon pots Gray Birch 200 unrooted poles Buttonbush 25 bare root Silky Dogwood 200 bare root Ninebark 175 bare root Rhododendron 50 3 gallon pots White Pine 150 3 gallon pots

Common Name # Size

Two healthy Single Stone Bendway Weir (SSBW) stones.

CONSTRUCTION DINGMANS CR-SITE 4 PIX BY DERRICK 9-19-2009

CONSTRUCTION PHOTOS

by Dave Derrick, September 19-20,

2009

Traffic Control Stones (TCS) sized about 3 ft by 3 ft by 4 ft, dug into the bed & bank, designed to stabilize & roughen the bank,

are spaced 3 to 6 ft apart. Every 4th TCS is keyed into the bank & has a Single Stone Bendway Weir attached. 8 SSBW total

Traffic Control Stones (TCS) with Single Stone Bendway Weirs (SSBW)

& vegged keys & pole plantings

Key

Key

TCS

KeyTCS

SSBW

TCS

TCS

TCS

TCS

TCS

TCS

TCS

SSB

W

SSB

W

Key

Key

Key

Thalweg

Key

Rooted–stock container shrubs & trees added to Traffic Control Stones at toe & all bare areas of the entire eroding bank

Key

Key

TCS

KeyTCS

SSBW

TCS

TCS

TCS

TCS

TCS

TCS

TCS

SSB

W

SSB

W

Key

Key

Key

Thalweg

CONSTRUCTING THE VEGETATED KEY, TRAFFIC CONTROL STONE, & SINGLE STONE BENDWAY WEIRS FOR # 4 &

5.

Place Live Poles against both sides of trench

Detail for key

Flow

Detail for key

Flow

Place stone in key trench.

Looking across @ stone being placed in the key for Bendway Weir #4. Live poles have already been placed in the key trench.


Close-up of stone being placed in key for BW #4.


Looking across @ key installation of BW #5.


Looking across @ live poles & key stones in BW #5.


Choke stone with gravel-cobble

(white areas) & water in

Detail for key

Flow

Backfill and overfill with native soils,

then compact (some settling will still

occur)

Detail for key

Flow

Seed

DONE WITH THE KEY

Detail for key

Flow

Close-up of a Single Stone

Bendway Weir (SSBW) &

vegged key & pole plantings

Thalweg

Key

TCS

SSB

W

Key

Key

CONSTRUCTION COMPLETE

Photos by Dave Derrick

SEPT. 24, 2009

Very natural, minimal structure approach

Construction complete, looking DS @ 175 ft of the 200 ft long project. This should look completely natural in a couple years!!

CONSTRUCTION COMPLETE DINGMANS CR-SITE 4 DERRICK 9-24-2009

Construction complete, looking DS. TCS, Single Stone Bendway Weirs, random boulder field, many pole plantings & rooted-stock plants provide plenty of roughness @ toe of slide.


Construction complete, DS @ the random boulder field & planted slide.


Construction complete, looking across @ Bendway Weir #3, along with a vegetated key, hillside plantings, & TCS US & DS.


Construction complete, looking across @ dense rooted-stock plantings of trees & shrubs on the DS 1/3 of the slide area


1 YEAR AFTER PROJECT

COMPLETION Photos by

Dave DerrickSEPT. 12, 2010

1 YEAR LATER-Looking @ LDB Bendway Weir #1. BW is stable, plantings are growing, upper bank stable.

1 YEAR LATER-DINGMANS CR.-SITE 4-PIX BY DERRICK 9-12-2010

1 YEAR LATER-Bendway Weir #2. Plantings will trap & stabilize eroded material from the upper bank.


1 YEAR LATER-Looking @ plantings & Bendway Weir #2.


1 YEAR LATER-Looking @ Bendway Weir # 2 & plantings. All stable, growth good, deep pool off stream end of Bendway Weir.


1 YEAR LATER-Looking DS @ well-aligned channel with stone & veg roughness on outer bank throughout the bend.


1 YEAR LATER-Stream has put almost all of the stone in compression (imbricated)


1 YEAR LATER-Mid-project Bendway Weirs, Traffic Control Stones, & vegged floodplain bench.


1 YEAR LATER-End of project Bendway Weirs, Traffic Control Stones, & vegged floodplain bench.


1 YEAR LATER-Looking US @ great functioning channel & vegged floodplain bench.


1 YEAR LATER-Looking US @ Bendway Weirs, Traffic Control Stones, & vegged floodplain bench.


1 YEAR LATER-Looking US stable mid-section of project.


1 YEAR LATER-Looking US @ robust plantings that will stabilize the bank & trap coluvium for bare areas of upper bank.


Cleophus says “Geaux Saints”

DINGMANS CREEK, SITE 4, SMALL SLIDE, DELAWARE WATER GAP PROJECT VEGETATED KEYS; TRAFFIC CONTROL...

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