SITE 6 – DELAWARE RIVER RIGHT BANK BLOW-OUT UP THE HILL FROM THE DELAWARE RIVER (SWIRLING RIVER...
-
Upload
gabriella-mills -
Category
Documents
-
view
219 -
download
2
Transcript of SITE 6 – DELAWARE RIVER RIGHT BANK BLOW-OUT UP THE HILL FROM THE DELAWARE RIVER (SWIRLING RIVER...
SITE 6 – DELAWARE RIVER RIGHT BANK BLOW-OUT UP THE
HILL FROM THE DELAWARE RIVER
(SWIRLING RIVER EROSION & GROUNDWATER PIPING) DELAWARE WATER GAP
NATIONAL RECREATION AREA NATIONAL PARK SERVICE PROJECT CONSTRUCTED
SEPTEMBER 10-15, 2009
PROBLEMS This bowl-shaped upper bank blow-out appears to have
been initially eroded by river flows guided into the area by a jam of large downed trees at the toe of the right bank (see next slide). The swirling water eroded the bank leaving a circular failure with steep banks.
Additional erosion has been caused by flood waters draining back into the eroded area from the surrounding fields during high water events.
A third stressor is groundwater piping exiting the eroding bank at an old stream location. The stream was rerouted decades ago. Water seeps from the active failing bank.
The actively eroding bank is failing in an uphill direction & presently threatening an important archeological site.
Aerial view of project area with work limits
delineated.
Note Large Woody debris (LWD) in river
that vectored river energy into the bank causing the bank to
initially erode.
Courtesy of Ecological Restoration, Inc.
PRE-PROJECT PHOTOS
by Dave Derrick
July 23, 2008, Dec. 15, 2008, & Sept. 9, 2009
From top bank, looking downhill at the blow-out area.
PRE-PROJECT DELAWARE RIVER-SITE 6 - PIX BY DERRICK 7-23-2008
Looking north, this area has decent native grasses.
PRE-PROJECT DELAWARE RIVER-SITE 6 - PIX BY DERRICK 7-23-2008
Vertical eroding scarp is masked by vegetation.
PRE-PROJECT DELAWARE RIVER-SITE 6 - PIX BY DERRICK 7-23-2008
Looking uphill (west) at eroding bank, gully & escarpment.
PRE-PROJECT DELAWARE RIVER-SITE 6 - PIX BY DERRICK 7-23-2008
Looking uphill (west) @ the eroding escarpment partially caused by groundwater seepage.
PRE-PROJECT DELAWARE RIVER-SITE 6 - PIX BY DERRICK 7-23-2008
Escarpment & erosion is easier to see during winter
PRE-PROJECT DELAWARE RIVER-SITE 6-PIX BY DERRICK 12-15-2008
Looking uphill (southwest) @ escarpment & eroded bank.
PRE-PROJECT DELAWARE RIVER-SITE 6-PIX BY DERRICK 12-15-2008
Looking south @ escarpment & bank erosion.
PRE-PROJECT DELAWARE RIVER-SITE 6-PIX BY DERRICK 12-15-2008
THE PLAN
SOLUTIONS (THE PLAN) This project is designed to stabilize the bank at the
present location by using “soft” stabilization methods. Banks will be sloped and a sloping 12 inch thick gravel French drain installed. The drain will be covered with geotextile and a foot thick layer of topsoil. Native grasses will be seeded in all disturbed areas & over the French drain. A 100% coir Erosion Control Blanket will be installed over the soil with many species of rooted stock shrubs installed at the top and bottom of the French drain. At the toe of the slope two rows of coir logs will be installed with two rows of rooted willow & dogwood whips, & unrooted willows planted in between.
On the lower river bank, 3 rows of rooted willow whips will be installed to bridge a gap in the existing riparian corridor & reduce the chance of high river flows from again swirling into the repaired bank area.
Courtesy of Ecological Restoration, Inc.
CONSTRUCTION PHOTOS
by Dave Derrick, September 10-14, 2009
A follow-the-river hiking path had just been completed at the project site. We used a portion of the path for access.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
PLANTS PLANTED
Fragrant Sumac 27 3 gallon pots Silky Dogwood 400 bare root & cuttings Black Willow 1210 cuttings & tree bands Ninebark 9 3 gallon pots Nannyberry 57 1 gallon pots Arrowwood 56 1 gallon pots Grey Dogwood 27 3 gallon pots
Common Name # Size
TRENCH PLANTING
ROOTED-STOCK WILLOW WHIPS DOWN BY THE
RIVER
Looking downhill @ mini trackhoe digging a trench for the rooted-stock willow whips.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
NARROW TRENCH PLANTING TECHNIQUE
Dig the trench.
Spoil
NARROW TRENCH PLANTING TECHNIQUE
Place the last scoop of dug soil back in the trench so plantings
are in loose material.
Spoil
Looking DS @ the trench closest to the river & two flats of willow whips. Three trenches parallel with the river will be dug & planted with willow to tie into the existing US & DS forested riparian buffer.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
NARROW TRENCH PLANTING TECHNIQUE
Place rooted-stock willow whips into
loose soil in trench. Lean whips against side of trench away from the spoil pile
Spoil
Rooted-stock Black Willow whips in tree bands (small pots)
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
Willows are 6 months old, cuttings were planted in a 2.75 inch by 2.75 inch by 6 inch pot in March (now 4-6 ft tall, approx.½ diameter)
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
Close-up of rooted-stock Black Willow whips in trench.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
Close-up of rooted-stock Black Willow whips in trench.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
Whips in trench, planted at a rate of three whips per foot.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
NARROW TRENCH PLANTING TECHNIQUE
Water plants in &
backfill.
Mini-excavator backfilling trench, which plants the willows.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
Looking DS. The trench closest to the river is keyed up & into the existing riparian forest @ both the US & DS ends.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
Looking DS @ the uppermost of the 3 trench plantings.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Looking DS @ the uppermost of the 3 trench plantings.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Close-up of the trench willow plantings. Good sandy soil.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Looking DS @ all 3 parallel willow trenches & silt fence.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
TRENCH PLANTING THE ROOTED-STOCK WILLOW WHIPS DOWN BY THE
RIVER IS COMPLETE !!
NEXT ARE THREE SETS OF PIX OF THE FRENCH DRAIN AREA
LOOKING NORTH, EAST, & SOUTH.
PIX ARE PRE-PROJECT,
CONSTRUCTION, & POST-PROJECT
THE FRENCH DRAIN, WITH
GEOTEXTILE, SOIL, NATIVE GRASS SEED, & COIR
MATTING (LOOKING NORTH)
Looking north @ the eroded, unstable bank.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
An archeological dig was undertaken at the eroding bank. We understand nothing of significance was found. This was filled with the 3 inch gravel filter material to form a chimney drain.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
Looking north. Bank sloped with the mini tracked loader.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
SUITABLE STONE
For the “French drain’ sloped filter a 1 ft thick layer of 3 inch poorly sorted gravel was used.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
Looking north. Spreading filter gravel with the mini loader.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Gravel staged down over sloped bank.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Gravel spread, ready for the geotextile separator. Mound at top bank will not allow rainwater to gully down new slope.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Geotextile will be tucked in @ sharp edge @ top bank.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Rolling geotextile over filter. Twelve inches of soil has been placed over the geotextile in the foreground.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Geotextile key trenched at top & partially covered @ toe.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Looking north @ 12’ soil cover over geotextile. Seeding next. Trenches at bottom will be planted with willow & dogwood.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-12-2009
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
Looking north. 100% coir Erosion Control Blanket covers soil & seed. Two trenches at toe planted with Black Willow & dogwood.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-14-2009
Close-up of trench plantings & trenched-in toe of coir ECB.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-14-2009
CONSTRUCTION COMPLETEPhotos by
Dave Derrick SEPT. 18, 2009
CONSTRUCTION COMPLETE-DELAWARE R-SITE 6-DERRICK 9-18-2009
CONSTRUCTION COMPLETE-Looking north @ top bank
5 DAYS AFTER PROJECT
COMPLETIONPhotos by Derrick SEPT. 23, 2009
5 DAYS LATER-Looking north @ top bank.
5 DAYS LATER - DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-23-2010
5 DAYS LATER-Looking north. Note cover crop grass growing through coir matting. Native grass will germinate spring 2010.
5 DAYS LATER - DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-23-2010
5 DAYS LATER-Looking north @ top, slope, & toe.
5 DAYS LATER - DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-23-2010
5 DAYS LATER-Looking north @ toe. Unrooted willow leaves have withered, while rooted willow poles are robust.
5 DAYS LATER - DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-23-2010
THE FRENCH DRAIN WITH GEOTEXTILE,
SOIL, SEED, AND COIR MATTING (LOOKING EAST)
Looking east. Sloping bank with the mini tracked loader.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
Sloping & grading bank. Filter gravel staged.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-10-2009
Looking east. Spreading filter gravel with the mini loader.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Geotextile in place, some soil staged.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Upper edge of geotextile is tucked in @ vertical face of gravel.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Looking uphill @ staged soil on geotextile.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Looking uphill @ staged soil on geotextile.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Looking uphill. Ready to roll geotextile downslope.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Looking downhill @ 12” layer of soil over the geotextile. Site is now ready to be seeded & 100% coir Erosion Control Blanket (ECB) laid out & anchored down.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Looking east. Site has been seeded. Coir mat is now being installed. Note key trench for ECB @ toe of slope.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-12-2009
Looking east @ upper key trench for coir matting (ECB).
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-12-2009
Looking east. Rolling coir & anchoring with wire staples.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-12-2009
Close-up of trench plantings & trenched-in toe of coir ECB.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-14-2009
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-18-2009
Completed slope filter, geotextile, soil layer, seed, & ECB with two rows of narrow trench dogwood & willow rooted poles & 2 coir logs
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-18-2009
Completed slope filter, geotextile, soil layer, seed, & ECB with two rows of narrow trench dogwood & willow rooted poles & 2 coir logs
Coir logs tied into hillside @ DS end.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-18-2009
Looking downhill @ upper bank riparian plantings.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-18-2009
CONSTRUCTION COMPLETEPhotos by
Dave Derrick SEPT. 18, 2009
CONSTRUCTION COMPLETE-DELAWARE R.-SITE 6-DERRICK 9-18-2009
CONSTRUCTION COMPLETE-Looking east @ top bank & slope
5 DAYS AFTER PROJECT
COMPLETIONPhotos by Derrick SEPT. 23, 2009
5 DAYS LATER-Looking east @ top bank plantings.
5 DAYS LATER - DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-23-2010
5 DAYS LATER-Looking east @ cover crop grass growing through the coir Erosion Control Blanket.
5 DAYS LATER - DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-23-2010
5 DAYS LATER-Looking east @ top, slope, & toe.
5 DAYS LATER - DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-23-2010
5 DAYS LATER - DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-23-2010
5 DAYS LATER-Looking @ toe. Rooted willow poles are robust while unrooted willow pole leaves have withered.
THE FRENCH DRAIN WITH GEOTEXTILE, SOIL, SEED, AND COIR MATTING -
LOOKING SOUTH (FROM UPSTREAM
LOOKING DOWNSTREAM)
Looking south @ sloped bank & completed gravel filter, with a portion covered with geotextile & 12” soil layer.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Looking south @ sloped bank & completed gravel filter, with a portion covered with geotextile & 12” soil layer
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-11-2009
Looking south, French drain & geotextile in. Some areas the soil layer, seed, & ECB has been installed.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-12-2009
Vegetation in center was left alone as many high quality native grasses are populating that area.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-12-2009
All slope work is complete, trench plantings in at toe.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-14-2009
Close-up of trench plantings & trenched-in toe of coir ECB.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-14-2009
Looking south @ completed slope.
CONSTRUCTION DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-14-2009
CONSTRUCTION COMPLETEPhotos by
Dave Derrick SEPT. 18, 2009
CONSTRUCTION COMPLETE-DELAWARE R-SITE 6-DERRICK 9-18-2009
CONSTRUCTION COMPLETE-Looking south @ top bank plants.
CONSTRUCTION COMPLETE-DELAWARE R-SITE 6-DERRICK 9-18-2009
CONSTRUCTION COMPLETE-Looking south @ top bank plants, and top bank mound that will guide rain water away from slope
CONSTRUCTION COMPLETE-DELAWARE R-SITE 6-DERRICK 9-18-2009
CONSTRUCTION COMPLETE-Looking south @ completed slope filter, geotextile, soil layer, seed, & ECB with two rows of narrow
trench dogwood & willow rooted poles & 2 coir logs.
CONSTRUCTION COMPLETE-DELAWARE R-SITE 6-DERRICK 9-18-2009
CONSTRUCTION COMPLETE-Coir logs keyed up slope
CONSTRUCTION COMPLETE-DELAWARE R-SITE 6-DERRICK 9-18-2009
CONSTRUCTION COMPLETE-Close-up of plants @ toe.
CONSTRUCTION COMPLETE-DELAWARE R-SITE 6-DERRICK 9-18-2009
CONSTRUCTION COMPLETE-Looking south @ toe.
CONSTRUCTION COMPLETE-DELAWARE R-SITE 6-DERRICK 9-18-2009
CONSTRUCTION COMPLETE-Looking south @ the project
CONSTRUCTION COMPLETE-DELAWARE R-SITE 6-DERRICK 9-18-2009
CONSTRUCTION COMPLETE-Looking south @ the overall project
5 DAYS AFTER PROJECT
COMPLETIONPhotos by Derrick SEPT. 23, 2009
5 DAYS LATER-Looking south @ top bank.
5 DAYS LATER - DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-23-2010
5 DAYS LATER-Looking south @ top bank & slope. Note cover crop grass growing through coir mat.
5 DAYS LATER - DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-23-2010
5 DAYS LATER-Looking south @. Top, slope, & toe. Note mound at top slope to prevent overbank flow down slope
5 DAYS LATER - DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-23-2010
5 DAYS LATER-Looking south @ project & native grasses in center that were not disturbed.
5 DAYS LATER - DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-23-2010
5 DAYS LATER-Filling ruts in haul road.
5 DAYS LATER - DELAWARE RIVER-SITE 6-PIX BY DERRICK 9-23-2010
TOTALLY FINISHED
1 YEAR AFTER PROJECT
COMPLETION Photos by
Dave DerrickSEPT. 12, 2010
1 YEAR LATER-Looking US @ the US end of one of the rows of willows. So much other growth, hard to find willows, time will tell. Entire project was well vegetated & very stable, very little sediment.
1 YEAR LATER-DELAWARE R.-SITE 6 PIX BY DERRICK 9-12-2010
1 YEAR LATER-Looking east at toe of south slope. Decent growth, rooted-stock willows did better than unrooted poles. Very little sediment by coir logs.
1 YEAR LATER-DELAWARE R.-SITE 6 PIX BY DERRICK 9-12-2010
1 YEAR LATER-Something is tearing up the 100% Coir logs, but they have served their purpose. Very little
sediment came off of the slopes, which is good!!
1 YEAR LATER-DELAWARE R.-SITE 6 PIX BY DERRICK 9-12-2010
1 YEAR LATER-Looking north @ west slope. All sections well vegetated & stable. Willow growth is decent.
1 YEAR LATER-DELAWARE R.-SITE 6 PIX BY DERRICK 9-12-2010
1 YEAR LATER-Looking @ coir logs & willows. All vegged, all stable (bottom, slopes, & top bank), no slope movement.
1 YEAR LATER-DELAWARE R.-SITE 6 PIX BY DERRICK 9-12-2010
1 YEAR LATER-Looking north @ west & north slopes. All vegged, all stable, no slope movement, very little sediment.
1 YEAR LATER-DELAWARE R.-SITE 6 PIX BY DERRICK 9-12-2010
1 YEAR LATER-Looking south @ west slope. All vegged, all stable, no slope movement, very little sediment.
1 YEAR LATER-DELAWARE R.-SITE 6 PIX BY DERRICK 9-12-2010
1 YEAR LATER-Looking southwest. All vegged, all stable, no slope movement, very little sediment.
1 YEAR LATER-DELAWARE R.-SITE 6 PIX BY DERRICK 9-12-2010
1 YEAR LATER-Looking @ west slope. All vegged, all stable, no slope movement, very little sediment.
1 YEAR LATER-DELAWARE R.-SITE 6 PIX BY DERRICK 9-12-2010
1 YEAR LATER-Looking toward the river. All vegged, all stable, no slope movement, very little sediment.
1 YEAR LATER-DELAWARE R.-SITE 6 PIX BY DERRICK 9-12-2010
This PowerPoint presentation was developed & built by Dave Derrick.
Any questions or comments, call my personal cell @ 601-218-7717, or email @ [email protected]
Enjoy the information!!
CONSTRUCT-LIVING DIKES-DINGMANS CR. PIX BY DERRICK 9-25-09
#1 Saints fan!!