HomeMy WebLinkAbout20041512 Ver 1_Year 5 Monitoring Report_20090925by -1512
Stonebridge Mitigation Project
Moore County, North Carolina
FINAL Year 5 Monitoring Report
Prepared for
Environmental Banc and Exchange, LLC
909 Capability Drive, Suite 3100
Raleigh, NC 27606
Prepared by
WK Dickson and Co., Inc.
720 Corporate Center Drive
Raleigh, NC 27607
(919) 782 -0495
September 2010
FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Table of Contents
1.0
SUMMARY ............................................................................................. ..............................1
2.0
INTRODUCTION .................................................................................. ...............................
1
2.1
Project Description ....................................................................... ...............................
1
2.2
Project Purpose ............................................................................. ............................... 2
2.3
Project History & Schedule .......................................................... ............................... 3
3.0
VEGETATION ........................................................................................ ..............................8
3.1
Vegetation Success Criteria .......................................................... ............................... 8
3.2
Description of Species and Vegetation Monitoring ...................... ............................... 8
3.3
Results of Vegetation Monitoring ................................................. ............................... 9
3.4
Vegetation Observations & Conclusions .................................... ...............................
11
4.0
STREAM
MONITORING ................................................................... ...............................
11
4.1
Stream Success Criteria .............................................................. ...............................
11
4.2
Stream Morphology Monitoring Plan ......................................... ...............................
12
4.2.1 Cross Sections .................................................................... ...............................
12
4.2.2 Longitudinal Profile ........................................................... ...............................
12
4.2.3 Hydrology .....................................................:.................... ...............................
12
4.2.4 Stream Photo Reference Stations ....................................... ...............................
13
4.3
Stream Morphology Monitoring Results .................................... ...............................
13
4.3.1 Cross Sections .................................................................... ...............................
13
4.3.2 Longitudinal Profile ........................................................... ...............................
13
4.3.3 Hydrology .......................................................................... ...............................
20
4.4
Stream Conclusions .................................................................... ...............................
21
5.0
CONCLUSIONS AND RECOMMENDATIONS ............................... ...............................
21
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FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
List of Figures
Figure1. Vicinity Map ..................................................................................... ............................... 4
Figure2. USGS Map ........................................................................................ ............................... 5
Figure 3. Monitoring Overview Map ............................................................... ............................... 6
Figure 4. Stream Observation Areas Map ...................................................... ............................... 16
Figure 5. 2010 Precipitation Data for Stonebridge ........................................ ............................... 21
List of Tables
Table 1. Project Mitigation Structure and Objectives ..................................... ............................... 2
Table 2. Project Activity and Reporting History ............................................. ...............................
3
Table3. Project Contacts ................................................................................. ...............................
3
Table 4. Planted Tree Species ......................................................................... ...............................
9
Table 5. Summary of Vegetation Monitoring Results ................................... ...............................
10
Table 6. Volunteer Tree Species ................................................................... ...............................
11
Table 7a. Summary of Morphologic Monitoring Parameters for UT1 .......... ...............................
14
Table 7b. Summary of Morphologic Monitoring Parameters for UT2 ......... ...............................
14
Table 8. Stream Observation Areas ............................................................... ...............................
15
Table9. Crest Gauge Data ............................................................................. ...............................
20
Table 10. Summary Precipitation Data ......................................................... ...............................
20
Table 11. Summary of Stream Crest Gauge Data 2006 -2010 ....................... ...............................
22
Table 12a. Summary of Morphologic Monitoring Parameters 2006 -2010 for UT ....................
22
Table 12b. Summary of Morphologic Monitoring Parameters 2006 -2010 for UT2 ....................
22
Table 13. Summary of Vegetative Monitoring Data 2006 - 2010 ................... ...............................
23
APPENDICES
Appendix A As -Built Survey
Appendix B 2009 Profile and Cross Section Data
Appendix C 2009 Site Photos
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FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
1.0 SUMMARY
The Stonebridge Stream Mitigation Project site is located north of the town of Carthage in Moore
County, North Carolina. It lies within hydrologic unit 03030003 in the Cape Fear River Basin.
This project was identified by EBX -Neuse I, LLC (EBX) as having potential to help meet the
compensatory mitigation requirements of the NC Department of Transportation ( NCDOT).
NCDOT contracted with EBX to perform the mitigation work under Full Delivery Project S -1.
Two unnamed tributaries (UT -1 and UT -2) to Crawley Creek were restored to create a total of
6,120 stream mitigation units (SMU). All restoration is being monitored for five years to
document success. Baseline data on stream morphology and vegetation were collected
immediately after construction and planting were complete. This information is documented in
the As -Built Report dated April 27, 2006. The As -Built survey is included as Appendix A of this
report. Information on stream morphology and vegetation will be collected each year and
compared to the baseline data and data from previous monitoring years.
This Annual Monitoring Report presents the monitoring data collected during Monitoring Year 5
at the Stonebridge Stream Restoration Site. Data collected for 2010 include: monthly crest gauge
readings, monthly observations of current conditions, vegetation monitoring, cross section survey,
digital images, and observations of stream stability.
Fourteen 100 - square -meter monitoring plots were used to measure survival of the planted woody
vegetation. The 2010 vegetation monitoring documents a range of survival is from 364 to 769
stems per acre. With an average of 526 stems per acre, the site is has achieved the final vegetation
success criteria of 260 stems per acre after the fifth growing season. Areas surrounding vegetation
plots 4 and 5 were replanted with 2- year -old trees prior to the start of the 2007 growing season to
address high mortality in these plots. These areas were also replanted with 3- year -old trees during
the spring of 2008 due to continued high mortality rates. In 2009 and 2010 vegetation plots 4 and
5 did not exhibit high mortality compared to 2008 mortality rates.
At least three occurrences of out -of -bank or bankfull events occurred between the months of
February and August 2010. The stream morphology remains stable and little fluvial erosion was
observed during the 2010 monitoring season.
Based on the results presented in this Year 5 Monitoring Report, the project has achieved the
stream and vegetative success criteria specified in the Mitigation Plan.
2.0 INTRODUCTION
2.1 PROJECT DESCRIPTION
The project site is located in Moore County, North Carolina, north of the town of Carthage
(Figure 1 & Figure 2) within hydrologic unit 03030003 in the Cape Fear River Basin. The
project site is accessed from the west via Glendon - Carthage Road. The 1,196 -acre parcel has been
used for agricultural purposes as a livestock operation. The surrounding area is rural, with a mix
of farms, woodlands and home sites. Dominant soil types on this project site include Congaree,
Mooshaunee, Pinkston, and Tetotum.
Two unnamed tributaries to Crawley Creek flow across the project site. The streams are referred
to in this Annual Report as UT -I and UT -2. UT -1 has a drainage area of 688 acres and UT -2 of
182 acres. Prior to implementation of the mitigation plan, the streams were in a disturbed
�J
FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
condition due to the impacts of unrestricted cattle access, dredging, and other anthropic channel
manipulations.
UT -1 was the most degraded resource and was the focus of restoration efforts. A total of 5,556
stream mitigation units (SMU) were achieved by restoring plan form, cross section, and profile
features on UT -1. This number is derived from the as-built survey of 5,676 linear feet of restored
stream length minus 70 feet for a crossing reservation near the middle of the project and minus
another 50 feet adjacent to the culvert at the downstream end of the project. UT -1 was restored to
a Rosgen Classification of C4/E4.
UT -2 was similarly degraded and flows east - southeast from a small dam, entering UT -1 near the
center of the project area. The design for this small tributary yielded an additional 564 linear feet
of restored stream. The total SMUs generated from stream restoration on UT -1 and UT -2 are
6,120. The entire easement, including UT -1 and UT -2, is completely fenced in.
2.2 PROJECT PURPOSE
This project was identified by EBX -Neuse I, LLC as having potential to help meet the
compensatory mitigation requirements of the NC Department of Transportation ( NCDOT) as
solicited through the NCDOT Full Delivery Project S -1. The objective of this project is to provide
at least 5,556 stream mitigation units (SW) to the NCDOT through the full delivery process.
The mitigation units are to be accomplished through the restoration and enhancement of stream
and riparian habitats as defined in the inter- agency Stream Mitigation Guidelines (USACE,
2003).
Table 1. Project Mitigation Structure and Objectives
e• <
React►,Nam. d �'
not
Sire i
� aMtigatbn'Units
� n
MU
Mitgxaha�. oa��'
pproa
UT 1
5,556
Restoration
UT2
564
Restoration
Total
6,120
2
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FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
2.3 PROJECT HISTORY & SCHEDULE
This project was identified by EBX -Neuse I, LLC in the spring of 2003. Table 2 outlines the
project history and milestones. Table 3 lists the project contacts.
Table 2. Project Activity and Reporting History
F-8 "_
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June 2005
EBX -Neuse 1, LLC
Mitigation Plan
919 608 -9688
December 2005
WK Dickson and Co., Inc
Final Design
919 782 -0495
February 2006
WK Dickson and Co., Inc
Construction
919 782 -0495
March 2006
Vegetation Planting
Aril 2006
As -built Baseline
Report
November 2006
Year 2 Monitoring
Report
March 2007
Supplemental Vegetation Planting
November 2007
Year 2 Monitoring
Report
November 2008
Year 3 Monitoring
Report
November 2009
Year 4 Monitoring
Report
November 2010
Year 5 Monitoring
Report
Table 3. Project Contacts
Contact°
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Firm =Infarinat ion
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Project Manager
EBX -Neuse 1, LLC
Norton Webster
919 608 -9688
Designer
WK Dickson and Co., Inc
Michael Ellison
919 782 -0495
Monitoring Contractor
WK Dickson and Co., Inc
Daniel Ingram
919 782 -0495
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Stonebridge Stream Mitigation Site
USGS Topographic Map
Moore County, NC
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FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year S)
3.0 VEGETATION
3.1 VEGETATION SUCCESS CRITERIA
Specific and measurable success criteria for plant density within the riparian buffer on the site are
based on the recommendations found in the WRP Technical Note and correspondence from
review agencies on mitigation sites recently approved under the Neu -Con Mitigation Banking
Instrument. The interim measure of vegetative success for the Stonebridge Mitigation Site —at
least 320 planted stems per acre at the end of the Year 3 monitoring period —was met in 2008.
The final vegetative success criterion for the survival of 260 - planted trees per acre at the end of
Year 5 of the monitoring period was met in 2010 (U.S. Army Corps of Engineers et. al. 2003).
Success of riparian vegetation was evaluated annually through monitoring planted stem survival
and photo documentation of vegetation plots. An assessment of the natural regeneration of woody
stems and herbaceous cover was also performed. Up to 20 percent of the species composition
may be comprised of volunteers. Remedial action would have been required should these
volunteers (i.e. loblolly pine (Pinus taeda), red maple (Acer rubrum), sweet gum (Liquidambar
styraciflua), etc.) exceed 20 percent composition.
3.2 DESCRIPTION OF SPECIES AND VEGETATION MONITORING
All vegetation was planted in March 2006 after construction was complete. Bare root native tree
and shrub species were planted to establish forested riparian buffers of at least fifty feet on both
sides of the restored stream. The plants were selected to establish vertical habitat structure and a
diverse mix of species (Table 4). The planted area consists of two zones. The first is a wetter
zone predominantly consisting of moist soil species such as green ash (Fraxinus pennslyvanica),
ironwood (Carpinus caroliniana), and elderberry (Sambucus canadensis). The second is a drier
zone predominantly consisting of more mesic species such as yellow poplar (Liriodendron
tulipifera) and Northern red oak (Quercus rubra). Black locust (Robinia pseudo- acacia) was
planted as a nurse tree in the upland zone. The initial stocking of riparian plantings across the site
was approximately 758 stems per acre. In addition to the riparian plantings, black willow (Salix
nigra) cuttings bundles were installed on the outside of bends.
Fourteen 100 - square -meter vegetation - sampling plots were established at the restoration site to
monitor the success of riparian buffer vegetation. The locations of these plots were randomly
distributed across the planted portions of the site. The plots cover approximately 2% of the site.
The center of each plot is located with a ten -foot section of metal fence post with a white PVC
cover. Each planted woody stem was located with a three -foot section of white PVC and
identified with an aluminum tag. Planted woody species were be monitored twice per year for the
first three years and herbaceous plant cover was monitored annually using the notched -boot
method. The total number of each species planted is listed in Table 5.
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FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Table 4. Planted Tree Species
Commo n N e=
�centificaName
�FACe.Status
Shrubs
Elderberry
Sambucus canadensis
Silky Dogwood Dogwood
Cornus amomum
FACW+
Trees
Black Locust
Robiinia pseudocacia
FACU-
Green ash
Fraxinus pennsylvanica
FACW
Ironwood
Carpinus caroliniana
FAC
Red Oak
Quercus rubra
FACU
Red Bud
Cercis canadensis
FACU
River Birch
Betula nigra
FACW
Sweet Bay
Magnolia virginiana
FACW+
Sycamore
Platanus occidentalis
FACW -
Tulip Tree
Liriodendron tulipifera
FAC
Because of high mortality and the low stems per acre documented in 2006 for Plots 4 and 5, these
portions of the site were planted with approximately 600 2 -year -old trees in the spring of 2007 to
supplement the surviving stems per acre. This area also received a supplemental planting in
Spring 2008 with 3 -year old trees due to mortality resulting from 2007 drought conditions. The
stem counts reflect both the surviving original live stems and the supplemental stems planted.
3.3 RESULTS OF VEGETATION MONITORING
Stem counts were conducted at each monitoring plot during July 2010. All 14 vegetation -
monitoring plots were evaluated for success, and the overall condition of vegetation at the site
was assessed. Table 5 shows the number of woody stems recorded for each plot and the success
rate of each plot. Early above - average mortality in 2006 and 2007 necessitated that some areas be
replanted to maintain adequate density. The surviving planted stems per acre after the fifth year
ranged_ from 324 to 769, with an average of 520- planted trees per acre surviving at the site. Two
photos of each vegetation plot were taken at the time of the stem counts, one facing upstream and
the other facing downstream (Appendix Q.
All vegetation plots met the final success criteria of 260 planted trees per acre after 5 years. Slight
positive changes in survival have also occurred because of the resprouting ability of some
species. In a number of plots, individual stems previously recorded as dead had resprouted from
the root crown. This pattern was observed in several plots with redbud, green ash and elderberry.
All of the plots met the five -year success criteria of 260 stems per acre.
In 2008 and again in 2010, livestock entered a portion of the easement and temporarily damaged
the herbaceous vegetation. This problem was corrected, and no reduction in planted stem survival
was observed. The earlier impact resulted in an increase in the dominance of grasses in plot 2.
The incursion in 2010 resulted in only minor damage to the herbaceous vegetation and no impacts
to woody vegetation were observed.
Plot 4 has the lowest density, but with 324 stems per acre, it still meets the final success criteria
of 260 stems per acre after 5 years. The higher mortality experienced in this plot over the three
previous monitoring years appears to be due to locally shallow bedrock around this plot.
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FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Table 5. Summary of Vegetation Monitoring Results
gg^ ;,
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1
16
14
30
15
607
2
20
6
26
14
567
3
21
21
19
769
4
16
5
21
8
324
5
24
1
25
10
405
6
29
1
30
19
769
7
14
14
11
405
8
16
16
10
405
9
17
17
13
526
10
19
1
20
12
486
11
20
20
17
688
12
17
17
11
445
13
14
14
9
364
14
19
19
13
1 526
Avera a
19
12.9
1 520
Average Stems per Acre: 520
Range of Stems per Acre: 324 -769
Replanted in Spring 2007 and Spring 2008
A plan view drawing of the vegetation plots is provided in Figures 3A and 3B. The drawing
includes the appropriate information pertaining to vegetation monitoring of the project. The
drawing also shows the locations of the following features:
• Vegetation monitoring plots,
• Vegetation plot photo points,
• Locations of any vegetation problem areas, and
• Symbology to represent vegetative problem types (if appropriate).
The vegetation at the site is dense, with greater than 95 percent herbaceous cover that is variable
in composition, as would be expected in a natural riparian system. Areas previously observed to
have bare soil, particularly around Plot 1 and Plot 4, now have good herbaceous cover. Plot 1 has
the least coverage, likely due to the surrounding trees. Small- localized rocky areas also have
sparse herbaceous coverage. The locally dominant and commonly dense species are panic grass
(Panicum anceps) and Canada goldenrod (Solidago canadensis). Other prominent species include
dog fennel (Eupatorium capillifolium), Canadian horseweed (Conyza canadensis), devil's darning
needles (Clematis virginiana), sawtooth blackberry (Rubus argutus), trumpet creeper (Campsis
radicans), Carolina horsenettle (Solanum carolinense), American pokeweed (Phytolacca
americana), Pennsylvania smartweed (Polygonum pensylvanicum), common rush (Juncus
effusus), sedges (Carex sp.), and grape (Vitis sp.).
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FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Volunteer species are also monitored throughout the five -year monitoring period. Table 6 shows
the most commonly found woody volunteer species. The volunteer stems do not compromise
more than five percent of species surveyed at the site.
Table 6. Volunteer Tree Species
.✓�``�M;Pyi"�i.,
:Scien iic°Name.;. - ranu4 ;w,_,; „
- `,i i {ilhii� +fig
*CommonxName ,;.e.,,, ,;c
� �4"�'�'„ia`y,.
!;FAC Status
Acer rubrum
Red Maple
FAC
Car inus caroliniana
Ironwood
FAC
Ce halanthus occidentalis
Common Buttonbush
OBL
Diospyros vir iniana
Persimmon
FAC
Fraxinus Penns lvanica
Green Ash
FACW
Li uidambar slyraciflua
Sweet um
FAC+
Liriodendron tuli i era
Tulip Poplar
FAC
Pinus taeda
Loblolly Pine
FAC
Rhus co allinum
Winged Sumac
NI
Robinia pseudbacacia
Black Locust
UPL
Ulm us alata
Winged Elm
FACU+
Ulmus rubra
Slippery elm
FAC
3.4 VEGETATION OBSERVATIONS & CONCLUSIONS
Both herbaceous early successional vegetation and planted stems have become well established
across the site. Natural recruitment of species is also beginning to develop but does not threaten
to compete with the planted stems at this time. Despite the drought year in 2007 and below to
normal rainfall in 2008, the vegetation at this site is generally healthy and appears to be thriving.
A few areas, such as around plot 4, have experienced a slightly higher mortality than desired in
the past, but the stem counts through 2010 indicate that this trend may be abating. The site meets
the 5 -year success criteria for the vegetation plots.
4.0 STREAM MONITORING
4.1 STREAM SUCCESS CRITERIA
As stated in the Mitigation Plan, success criteria for the stream restoration site include the
following:
• Bankfull Events: Two bankfull flow events must be documented within the five -year
monitoring period.
• Cross sections: There should be little change in as-built cross sections. Cross sections
shall be classified using the Rosgen stream classification method, and all monitored cross
sections should fall within the quantitative parameters defined for "E" or "C" type
channels.
• Longitudinal Profiles: The longitudinal profiles should show that the bedform features
are remaining stable, e.g. they are not aggrading or degrading. Bedforms observed should
be consistent with those observed in "E" and "C" type channels.
• Photo Reference Stations: Photographs will be used to subjectively evaluate channel
aggradation or degradation, bank erosion, success of riparian vegetation and effectiveness
of erosion control measures.
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FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
• Benthic Macroinvertebrate: Sampling of benthic macroinvertebrates within the restored
stream channel shall be conducted for the first three years of post- restoration monitoring.
Plan view drawings of the project site are provided in Figures 4A- 4D. The drawings include the
appropriate information pertaining to monitoring of the project. These drawings show the
locations of the following features (if applicable): Cross section survey locations and Crest gauge
locations are shown on Figures 3A and 3B
• Bankfull channel limits
• Centerline of channel
• Easement boundary/Fencing
• Road crossings
• Root wads
• Log vanes
• Cuttings bundles
• Channel plugs
• Log toe protection
• Riffle grade control
• Cross weir structures
• Step pool structures
• Tributaries
4.2 STREAM MORPHOLOGY MONITORING PLAN
Along UT -1 and UT -2 a natural channel design approach was applied to develop stable hydraulic
geometry parameters. Construction began in October 2005 and was completed in February 2006.
The rebuilding of the channel established stable cross - sectional geometry, increased plan form
sinuosity, and restored streambed diversity to improve benthic habitat. Approximately 6,120
linear feet of stream restoration has been constructed.
4.2.1 Cross Sections
The mitigation plan for the Stonebridge Stream Mitigation Project requires twelve permanent
cross sections to be monitored along the restored tributaries UT -1 and UT -2. The cross sections
were established during monitoring set -up in evenly distributed pairs of one riffle and one pool
per 1,000 linear feet of restored stream. Locations of cross sections are specified in Figures 3A
and 3B. The cross section surveys and photographs are shown in Appendix B. Each cross section
was surveyed annually including measurements of floodplain, top of bank, bankfull, inner berm,
edge of water, and thalweg. In addition, any fluvial features present were documented.
4.2.2 Longitudinal Profile
Longitudinal profiles were surveyed annually during the monitoring period. The cumulative
length of the measured profiles was at least 3,664 linear feet. Features measured include thalweg,
inverts of in- stream structures, water surface, bankfull, and top of low bank.
4.2.3 Hydrology
Three crest gauges were installed at the site: one on UT -1 (CG3) near the downstream end of the
project and one each on UT -2 (CG2) and UT -1 (CG 1) immediately above the confluence (see
locations in Figures 3A and 3B). Crest gauges were checked monthly to document high flows.
During each visit, a determination was made if an out -of -bank event had occurred since the prior
12
FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
visit. During the gauge inspections, any high water marks or debris lines were documented and
photographed.
4.2.4 Stream Photo Reference Stations
There are no designated photo reference stations on the Stonebridge Mitigation site. Photos are
collected showing general conditions of the site (within the restoration easement), at all
structures, cross - sections, as well as specific areas of concern along the stream corridor
(Appendix Q.
4.3 STREAM MORPHOLOGY MONITORING RESULTS
Photographs were taken throughout the monitoring season to document the evolution of the
restored stream channel (Appendix Q. Herbaceous vegetation is moderately dense along the
restored stream. Pools have maintained a variety of depths and habitat qualities, depending on the
location and type of scour features (logs, root wads, transplants, etc.). A consistent stream flow
was present during the early monthly site visits, but the channel has been dry since May, except
for a few of the larger pools. At the time of the annual monitoring survey, the channel was dry.
Vegetation within and along the stream banks was observed to be often lush and provide stable
conditions. A number of log control structures were not visible due to dense vegetation.
No problems with stream morphology were observed during the monitoring field visits. Photos of
each located structure taken in July 2010 are included in Appendix C. The plan view drawings in
Figures 4A -4D show the locations of the following features:
• As -built stream centerline and bankfull'limits
• In- stream structures (e.g. root wads and log vanes)
• Locations of stream channel observation areas
4.3.1 Cross Sections
The cross sections were surveyed during the Year 5 monitoring activities in July 2010. The As-
Built cross - section surveys are shown with the Year 1, Year 2, Year 3, Year 4, and Year 5
monitoring cross section surveys in Appendix B. The Year 5 cross sections do not differ
significantly from the As- Built, Year 1, Year 2, Year 3, and Year 4 cross sections. All monitored
cross sections for 2010 show very little adjustment in stream dimension.
4.3.2 Longitudinal Profile
A longitudinal profile survey was conducted during the Year 5 monitoring activities in July 2010.
The previous surveys of profile and cross sections indicate that there has been very little
adjustment to the stream profile or dimension since construction. Using the surveyed dimensions
of the cross sections, morphological parameters were calculated for each reach and are included
in Tables 7a and 7b below.
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FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year S)
Table 7a. Summary of Morphologic Monitoring Parameters for UT1
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•: S a,2• °x,' i£`,=:
BAs =Buit t x
� °5` -" � �' aR;
,i .:Y!&
Year 5re.x
�?.r:�'� 'M`.�
.b•' t.
- Ek�n,. :n..� ^3 ��u:"��"" ;-
�j
.r;! i:k*:.: '�.�` i'�f _ :�`•
�M• �r
. °:. _ .� arty
Avg. Bankfull Xsec Area, Abkf (sq ft)
31.0
31.4
Avg. Bankfull Width, Wbkf (ft)
15.6
18.6
Avg. Bankfull W/D
8.1
11.1
Avg. Bankfull Mean Depth, Dbkf (ft)
2.0
1.7
Avg. Bankfull Max Depth, Dmax (ft)
2.9
3.1
Table 7b. Summary of Morphologic Monitoring Parameters for UT2
b..�, 'p�f.,�,u,,I�a;°F,us,
y4'�°�N m. ;� "':�" •'.$'4k 1;� "�",.Yrt:ff.. 4' $ �''_L, " -' ,� ": �;T'ajjl�'"S�,C,
""- ' -- �'9.'1`ki• �i ri�Y
Parameter
,,�y+,iy�}Y' r."nx^�!��.M:I�.g��F'P
"�';.LnW.VW,C� °�.''4 X " "1Cpk3
y T'h'i �e,� t �6 "3
c'As= Built
_i
'T�yi aa� ^'1�..G.'t
Year'S`t,i_'t
+. ._:'fiaJ'�''
i.«..y, x.p�r: ".,'� a1,Y
,3-:+a, . "'�;tr
.b•' t.
- Ek�n,. :n..� ^3 ��u:"��"" ;-
'j i'��. ?•? i-� -.,
Avg. Bankfull Xsec Area, Abkf (sq ft)
10.1
13.1
Avg. Bankfull Width, Wbkf (ft)
7.2
10.7
Avg. Bankfull W/D
5.1
8.7
Avg. Bankfull Mean Depth, Dbkf (ft)
1.4
1.2
Avg. Bankfull Max Depth, Dmax (ft)
1.7
2.3
Overall, the restored stream channel has remained stable with very little adjustment to the profile.
Diverse habitat is present including pools, grade control structures, vanes, various types of
vegetation along the banks, and the immediate buffer along the banks is providing shade to the
channel.
A number of minor issues were observed, but no remedial action is recommended (Table 8). '
Most previous issues have stabilized or are becoming stable. Minor erosion present along some of
the banks is due to the cattle intrusion described earlier, and in the buffer area, trampled
herbaceous vegetation is localized. No impacts to stream stability were observed and the cattle
have been removed. Water is flowing around a log grade control structure and a log vane,
causing minor erosion (SOA4, SOA5, and SOA6). A minor headcut has stabilized due to
vegetation.
14
FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Table 8. Stream Observation Areas
15
" �14
:�De$eHF
HIP
UT
Bank Erosion and
48+50,
Minor damage due to cattle incursion and
Buffer Vegetation
33+50 to 30+90
bank remains stable. No action
SOA I
Trampled
UT 2
recommended.
throughout
Right Bank
UTI
Minor erosion on right bank. Area has
Erosion
47+50 to 47+80
nearly stabilized since previous monitoring
SOA 2
survey observation in 2009.
Right Bank
UTI
Erosion
40+15 to 40+60
Minor erosion on right bank.
SOA 3
Bank undercut along right bank at log
Log Grade Control
UT2
grade control. Channel is stable and no
Right Bank
2+50
headcut was observed. No action
SOA 4
recommended.
Log vane undercut with minor headcut
Log Vane
UTI
upstream. Channel upstream and
SOA 5
16+00
downstream stable. No action
recommended.
Log'vane undercut. Channel upstream and
Van Log Ve
UTI
downstream are stable and unaffected. No
SOA 6
11+00
action recommended.
Headcut
UTI
Minor headcut. Vegetation has stabilized
SOA 7
2+15
the channel.
15
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I
FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
4.3.3 Hydrology
The crest gauges were read on monthly sites visits from February through July 2010 (Table 9).
All crest gauges recorded at least three out -of -bank or bankfull events that occurred during this
period. Weather data were collected from a nearby weather station - Carthage Water Treatment
Plant and the Moore County Airport. The precipitation data are summarized in Table 10 and
Figure 5 and indicate that conditions were below normal through July. Data collected from the
on -site gauge has only two monthly recordings, with one above normal and one below normal.
The June reading includes May and June. The July data was lost due to disturbance of the on -site
gauge from the cattle.
Table 9. Crest Gauge Data
Month
Recorded
Crest
Gauge 1
Crest
Gau e 2
Crest
Gnu e 3
January
- --
- --
- --
February
3.10
2.90
3.00
March
0.75
0.30
0.50
April
0.00
0.00
0.00
May
0.10
0.60
0.20
June
0.00
0.00
0.00
July
0.00
0.00
0.00
August
- --
- --
- --
September
- --
- --
- --
October
- --
- --
- --
November
- --
- --
- --
December
- --
- --
I - --
Table 10. Summary Precipitation Data
Month
Average
Normal Limits
Carthage
Precipitation
On -Site
Precipitation
30
Percent
70
Percent,
January
4.51
3.44
5.43
3.33
- --
February
3.54
2.39
4.24
1.75
- --
March
4.65
3.52
5.64
2.37
- --
April
3.08
1.93
4.17
0.00
1.71
May
4.06
2.65
4.86
0.17
- --
June
4.18
2.36
5.16
1.58
5.85
July *
5.37
3.06
6.7
0.82
- --
August
4.65
3.22
5.57
- --
- --
September
4.45
3.23
6.24
- --
- --
October
3.54
1.86
4.73
- --
- --
November
3.47
2.2
4.52
- --
- --
December
3.38
2.28
4.04
- --
- --
Annual
32.14
61.30
Total
48.88
10.02
7.56
20
FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
*Raingauge data at site not recorded due to gauge dislodged
Data collected through July
Figure 5. 2010 Precipitation Data for Stonebridge
2010
Precipitation for Stonebridge Site
10.0 —
9.0
80
70 —
v •
6.0
c _
R 50 —
4.0 —
a`
3.0
....
2.0
1.0
J F M A M J J A S O N D
Months
--0 -On -site RainpLige - ------ 30th/701h Percentile 6 Carthage Monthly Rainfall
4.4 STREAM CONCLUSIONS
Overall, the restored stream channel is stable and providing the intended habitat and hydrologic
functions. Water is flowing around a log grade control structure and a log vane, causing minor
erosion (Table 7, SOA4 and SOA5). A minor head cut is present upstream of the log vane.
Vegetation has stabilized the banks and channel at these structures. All monitored cross sections
for 2010 show very little adjustment in stream dimension. Three bankfull events were recorded
during the 2010 monitoring season, exceeding the requirement of two bankfull events within five
years.
5.0 CONCLUSIONS AND RECOMMENDATIONS
The stream, hydrologic, and vegetation monitoring data for all five monitoring years at the site
are summarized in Tables 11 -13. Based on this data and the other data and comments provided
above in Sections 3 and 4, it can be concluded that the site has achieved the stream, hydrologic,
and vegetative success criteria specified in the Mitigation Plan.
21
FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Table 11. Summary of Stream Crest Gauge Data 2006 -2010
fitl�iki
X2006" _
Year
2001
NMI
Years y
".K a i7i 3`�
2o�08�u
rear' °P
2 09�i010p,
ear
�4d
ears '
n = sk
,I,
pips ,
M11"
s
I; d
:..... ',
iij =fix"'.
`�m5��r;ai
;',c.,';, ^�ar.�'k''::ii
7i.�ikq�:-.'raaat.�`a:
Number of Bankfull
4
3
6
2
3
Events
23.5
29.9
31.4
s ft
Maximum Height
>4
3.7
2.8
3.7
3.1
Above Bankfull (feet)
14.2
14.5
15.3
15.1
18.6
I January - July
Table 12a. Summary of Morphologic Monitoring Parameters 2006 -2010 for UTl
�aa KK" i rA •�� P fi- �'�'�_ = h(N. " �
P b.�..,,
J eq `�
n iii
'�� �i: ?
(mk'
�'
d
u
it
Fear
'""Rd5 p
2009 '0
�
9II eat ' '��
�V�V A d �
�F n,
is Year.
„�
d 3 S
Bankfull Cross Section Area, Abkf
31.0
27.0
28.4
23.5
29.9
31.4
s ft
Avg. Bankfull Width, Wbkf (ft)
15.6
14.2
14.5
15.3
15.1
18.6
Bankfull W/D
8.1
7.9
7.7
10.4
7.9
11.1
Bankfull Mean Depth, Dbkf (ft)
j 2.0
j 1.9
1.9
1.6
2.0
1.7
Bankfull Max Depth, Dmax (ft)
1 2.9
1 2.7
3.0
2.7
3.12
3.1
Table 12b. Summary of Morphologic, Monitoring Parameters 2006 -2010 for UT2
1
W°�+ r '''.
Yea
�
Vp Dpa; Urg -
OW"
�
ii,
„�
d 3 S
Bankfull Cross Section Area, Abkf
10.1
11.5
11.5
9.8
10.6
13.1
(sq ft
Avg. Bankfull Width, Wbkf (ft)
7.2
8.7
8.5
7.9
8.3
10.7
Bankfull W/D
5.1
6.6
6.3
6.3
6.5
8.7
Bankfull Mean Depth, Dbkf (ft)
1.4
1.4
1.4
1.2
1.3
1.2
Bankfull Max Depth, Dmax (ft)
1.7
2.0
2.1
1 1.9
2.0
2.3
22
III
FINAL Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Table 13. Summary of Vegetative Monitoring Data 2006 -2010
�,:,�;,"
' ''� "
a
`a."
R55
.fi.,..., �,��m�wr
Plin ted1,Stems,
4,100K : !ts !,2'OU6 1007
,: ,:;
i, .;;: u ,.,,Year Year
ase:,.,.,,:,,,,;
(gin ,��, .. £F.
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4i.ii'.x it 4 }
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s
ar;,P
..:.
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648
526
364
607
607
607
2
810
526
526
607
607
567
3
850
769
769
769
688
769
4
648
283
283
324
324
364
5
972
567
567
445
405
405
6
1174
972
972
891
850
769
7
567
486
445
405
405
445
8
648
526
486
364
405
405
9
688
648
607
607
648
526
10
769
567
526
486
486
486
11
810
607
688
688
607
688
12
688
526
486
445
445
445
13
567
526
526
364
364
364
14
769
607
526
445
526.
526
Average
758
581
555
532
526
526
The stream morphology is stable, and little fluvial erosion was observed. Sedimentation that has
occurred in the stream channel is minor. The vegetation is surviving well throughout the
restoration project.
Overall, the project is performing as designed. Habitat has been improved significantly through
this project. Fluvial erosion has been greatly reduced so that the project site no longer contributes
excessive amounts of sediment to the receiving stream. Based on 2010 observations, the planted
vegetation on site is providing the intended riparian habitat, water quality benefits, and shade for
the stream system.
23
APPENDIX A
As -Built Survey
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2010 Profile and Cross Section Data
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Stonebridge, Cross Section 1, Riffle
10 20 30 40 50 60 70 80
Station (ft)
— bankfull elevation —flood prone area BAs- built —Year I —Ym 2 —Y.3 —Y=4 —Year5
Stonebridge, Cross Section 2, Pool
279
275
277
c 276
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274
273
272
271
0 5 10 15 20 25 30 35 U
Station (ft)
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276
275
274
a 273
0
v 272
u
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270
269
Stonebridge, Cross Section 3, Pool
u 5 10 15 20 25 30 35 40
Station (ft)
— bankfullelevation —As- b Wit —Year I —Year2 —Year3 —Year4 —YearS
Stonebridge, Cross Section 4, Riffle
279
278
— --
277
276
275
°o
— 274
v 273
�
272
271
270
269
0 5 10 15 20 25 w
Station (ft)
— bankfull elevation —Hood prone area — Asbuilt —YearI —Ymr2 —Year3 ----Year4 —Ycar:5]
273
272
271
c
c 270
0
W
v 269
W
268
267
266
Stonebridge, Cross Secdon 5, Riffle
10 15 0
Station (ft)
- bankfull elevation -Flood prone area -As -built -Year I -Year 2 -Year 3 -Year 3 -) car 9
272
271
270
269
268
267
266
Stonebridge, Cross Section 6, Pool
Station (fl)
— bankfull elevation BAs- built —Year I —Year 2 —Year 3 —Year 4 —Year 5
273
272
271
270
269
268
Stonebridge, Cross Section 7, Riffle
0 2 4 6 8 10 12 14 16 18
Station (ft)
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272
271
270
i;
269
268
267
Stonebridge, Cross Section 8, Pool
4 6 8 10 12 14 16
Station (ft)
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270
269
268
4=
a 267
0
y 266
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265
264
263
Stonebridge, Cross Section 9, Riffle
10 15 20 25
Station (ft)
— bankfull elevation —flood prone area —As -built —Year I —Year 2 —Year 3 —Year 4 —Year 5
C
c
0
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269
268
267
266
265
264
263
Stonebridge, Cross Section 10, Pool
0 5 IU Is 20 25 in
Station (ft)
— bankUl elevation —As- built — Year I —Year 2 —Year 3 —Year 4 —Year 5
269
268
267
266
265
264
263
262
Stonebridge, Cross Section 11, Riffle
Station (ft)
- bankfull elevation -Flood prone area -As -Built -Year I -Year 2 -Year 3 Year4 -Year 5-1
267
266
265
G
C
0 264
a
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263
262
261
Stonebridge, Cross Section 12, Pool
0 5 10 15 20 -_
Station (ft)
- bankfull elevation-As- built -YearI -Year 2 -Year 3 _Ycar4 -Year5
APPENDIX C
2010 Site Photos
Appendix C
2010 Site Photos
Stream Observation Area Photos
SOA 1 — Minor bank damage due to cattle incursion, upper reaches of UTI.
SOA 1 — Minor vegetation damage due to cattle incursion, upper reaches of UT1.
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos
Stream Observation Area Photos
�l
l
A L * 474 10
SOA 2 — Minor right bank erosion, UT1 Sta. 47 +50 to 47 +80.
SOA 3 — Minor right bank erosion, UTl Sta. 40 +15 to 45 +10.
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos
Stream Observation Area Photos
SOA 4 — Bank undercut along right bank at log grade control, UT2 Sta. 2 +50.
SOA 5 — Log vane undercut, UT1, Sta. 16 +00.
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos
Stream Observation Area Photos
�-
\. r a1
r s.
�, ,ter•, ,�h • / -�� 1 J
SOA 6— Log Vane undercut., UT1, Sta. 11 +00.
SOA 7 — Minor headcut. Vegetation has stabilized the channel., UT1 Sta. 2 +15.
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos - Vegetation Plot Photos
Vegetation Plot #1 - upstream
Vegetation Plot #1 — downstream
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos - Vegetation Plot Photos
Vegetation Plot #2 — upstream
Vegetation Plot #2 — downstream
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos - Vegetation Plot Photos
Vegetation Plot #3 — upstream
Vegetation Plot #3 — downstream
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos - Vegetation Plot Photos
Vegetation Plot #4 — upstream
Vegetation Plot #4 — downstream
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos - Vegetation Plot Photos
Vegetation Plot #5 — upstream
Vegetation Plot #5 — downstream
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos - Vegetation Plot Photos
Vegetation Plot #6 — upstream
Vegetation Plot #6 — downstream
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos - Vegetation Plot Photos
Vegetation Plot #7 — upstream
Vegetation Plot #7 — downstream
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos - Vegetation Plot Photos
Vegetation Plot #8 — upstream
Vegetation Plot #8 — downstream
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
s' •pIr`" �� S
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Appendix C
2010 Site Photos - Vegetation Plot Photos
Vegetation Plot #10 — upstream
Vegetation Plot #10 — downstream
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos - Vegetation Plot Photos
VP
II
Vegetation Plot #11 — upstream
Vegetation Plot #11 —downstream
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos - Vegetation Plot Photos
Vegetation Plot #12 — upstream
Vegetation Plot #12 — downstream
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos - Vegetation Plot Photos
Vegetation Plot #13 — upstream
Vegetation Plot #13 — downstream
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)
Appendix C
2010 Site Photos - Vegetation Plot Photos
Vegetation Plot #14 — upstream
Vegetation Plot #14 — downstream
Stonebridge Mitigation Site
Annual Monitoring Report for 2010 (Year 5)