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ANNUAL REPORT FOR 2004
Deer Creek Mitigation Site
Carteret County
Project No. 6.16901T
TIP No. R-2105 WM
Prepared By:
Office of Natural Environment & Roadside Environmental Unit
North Carolina Department of Transportation
December 2004
TABLE OF CONTENTS
SUMMARY .................................................................................................................... 1
1.0 INTRODUCTION .................................................................................................. 2
1.1 Project Description ............................................................................................ 2
1.2 Purpose .............................................................................................................2
1.3 Project History ................................................................................................... 2
2.0 HYDROLOGY ...................................................................................................... 4
2.1 Success Criteria ............................................................................................... . 4
2.2 Hydrologic Description ..................................................................................... . 4
2.3 Results of Hydrologic Monitoring ...................................................................... . 6
2.3.1 Site Data ..................................................................................................... . 6
2.3.2 Climatic Data .............................................................................................. . 6
2.4 Conclusions ...................................................................................................... .6
3.0 VEGETATION ..................................................................................................... . 8
3.1 Success Criteria ............................................................................................... . 8
3.2 Description of Species ...................................................................................... . 8
3.3 Results of Vegetation Monitoring ...................................................................... . 9
3.4 Conclusions ..................................................................................................... 10
4.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS ....................................... 10
FIGURES
FIGURE 1. SITE LOCATION MAP ................................................................................ 3
FIGURE 2. GAUGE LOCATION MAP ........................................................................... 5
FIGURE 3. DEER CREEK 30-70 PERCENTILE GRAPH ............................................. 7
TABLES
TABLE 1. GAUGE DESCRIPTION AND EXPECTATIONS .......................................... 4
TABLE 2. VEGETATION MONITORING RESULTS ..................................................... 9
APPENDICES
APPENDIX A. GAUGE DATA GRAPHS
APPENDIX B. SITE PHOTOGRAPHS
APPENDIX C. VEGETATION PLANTING PLAN
SUMMARY
The following report summarizes the monitoring activities that have occurred in the past
year at the Deer Creek Mitigation Site. Located in Carteret County, the Deer Creek Site
serves as mitigation for impacts associated with the widening of NC 24. The site was
originally designed to serve as integration between an onsite stormwater detention
facility and the surrounding environment. The site was constructed and planted in
Spring 2001; however, an initial vegetation failure led to a replanting of the site in the
spring of 2002. Monitoring activities in 2004 represent the fourth year of hydrologic
monitoring and the third year of vegetation monitoring.
The site must be monitored for five years following site construction or until success
criteria are met. Monitoring criteria include the percent cover of planted herbaceous
vegetation and the hydrologic conditions at the site. The site is monitored with thirty
vegetation plots, three surface water gauges, and one rain gauge. Data analysis
includes an examination of all recorded site data as well as an assessment of local
climate conditions throughout the growing season.
Hydrologic monitoring was conducted for a fourth year. The three surface water-
monitoring gauges on the site show consistent inundation throughout the growing
season. An examination of the water levels over a two-day period illustrates that the
site floods twice a day under average climatic conditions (as required in the permit
conditions). The two days in the plot were chosen at random and represent typical
conditions during the growing season.
For 2004, the vegetation monitoring revealed a frequency of target species at 79.3%
and the vegetative coverage scale value at 3.70. The vegetation data for 2004 met the
70% required frequency of target species and is on track to meet the scale value of 5 for
the vegetative coverage that is required in year five.
NCDOT will continue to monitor the Deer Creek Mitigation Site for hydrology and
vegetation.
1.0 INTRODUCTION
1.1 Project Description
The Deer Creek Mitigation Site is located in Carteret County on the north side of NC 24
at the northeast quadrant of the crossing of Deer Creek (see Figure 1 Location Map).
The mitigation site is approximately 4.25 acres in size. Approximately 1.5 acres of the
site had previously been allocated as a stormwater detention facility designed for the
NCDOT to treat runoff from the improvements associated with the widening of NC 24
(TIP No. R-2405AB). The existing Section 404 permit for widening NC 24 involves a
commitment by NCDOT to better integrate the original 1.5-acre storm water detention
basin into the existing natural environment. To accommodate this, the NCDOT
purchased the remaining 2.75 acres of land with the intent of utilizing the area to
provide compensatory mitigation for wetland impacts associated with this TIP project.
1.2 Purpose
In order to demonstrate successful mitigation, hydrologic and vegetative monitoring
must be conducted. Vegetation will be monitored for five years following the completion
of planting and vegetative marsh success is determined in accordance with NMFS
guidelines. The site will be considered hydrologically successful when the hydrologic
data shows that the site floods twice daily. The following report details the results of
hydrologic and vegetative monitoring during 2004 at the Deer Creek Mitigation Site.
1.3 Project History
March 2001
May 2001
June 2001
June -November 2001
August 2001
April 2002
February - November 2002
August 2002
December 2002
February - November 2003
August 2003
February - November 2004
July 2004
Construction completed
Site Planted
Gauges Installed
Hydrologic Monitoring (1 yr.)
Vegetation Monitoring (1 yr.)
Site Tilled and Replanted
Hydrologic Monitoring (2 yr.)
Vegetation Monitoring (Restart 1 yr.)
Spillway Modifications
Hydrologic Monitoring (3 yr.)
Vegetation Monitoring (2 yr.)
Hydrologic Monitoring (4 yr.)
Vegetation Monitoring (3 yr.)

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2.0 HYDROLOGY
2.1 Success Criteria
The success of this site is correlated to the planting elevations and to planting success.
If the plantings are successful, then the grading will have been correctly correlated to
the tidal fluctuations. The hydrologic monitoring aspect will involve the use of surface
water monitoring gauges. Groundwater monitoring is not required at this site since it is
a tidal system. The site will be considered hydrologically successful when the site is
flooded twice daily. Success is determined from data taken at the Gauge 1 location
(SG-1), as the other gauges are located within channels and are used for comparison of
tidal elevations. It is expected that the surface water flooding will be the same as that
measured for the biological benchmarks for Spartina alterniflora, since the grading was
done to an elevation that is known to be periodically flooded. Table 1 describes each
gauge and the hydrologic expectations of each. See Figure 2 for the precise location of
each gauge.
Table 1. Gauge Description and Expectations
Gauge < < Elevation Location Hydrologic Expectation
SG-1 1.20 ft Low marsh between channel and
high marsh. Flood twice daily
SG-2 -0.64 ft Within constructed channel of site. Remain flooded, daily fluctuations
SG-3 -0.54 ft In Deer Creek adjacent to site. Remain flooded, daily fluctuations
The site is monitored during the growing season. The
County begins February 27 and ends November 29
correspond to a 50% probability that temperatures will
February 27 and before November 29.
2.2 Hydrologic Description
growing season in Carteret
(274 days). These dates
drop to 28° F or lower after
Three surface water monitoring gauges and one rain gauge were installed onsite in
June 2001 (Figure 2). The surface water gauges record surface water readings every
hour. The Infinities rain gauge records rainfall amounts on a daily basis.
Appendix A contains plots of the data at each surface gauge location. The set of plots
shows the surface water recorded against the actual gauge elevation surveyed relative
to mean sea level. Also included in Appendix A is a plot of two days of surface water
data recorded at each gauge location; this plot is to illustrate that flooding occurs twice
daily as required in the permit conditions. The two days in the plot were chosen at
random and are representative of conditions throughout the growing season.
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2.3 Results of Hydrologic Monitoring
2.3.1 Site Data
Gauge 1 was evaluated to determine if the site was being flooded twice daily. Tide data
from Gauges 2 and 3 were evaluated for comparison.
Due to the relatively small size of the site, high tide elevations should be consistent
between the three gauges. Appendix A shows both the true elevation plots for all three
gauges, as well as an individual graph of Gauge 1 data that shows a two-day sample;
this graph demonstrates the twice daily heightened water levels common throughout the
growing season.
2.3.2 Climatic Data
Figure 3 is a comparison of monthly rainfall (November 2003- August 2004) to historical
precipitation for the area. The rainfall data for the months of September-November
2004 were not included in the graph. The two lines represent the 30th and 70th
percentiles of monthly precipitation for Morehead City, NC. These percentiles represent
monthly rainfall data collected between 1973 and 2004 that was provided by the State
Climate Office of North Carolina at NC State University.
For the 2004-year, December (03') and February experienced above average rainfall.
The months of January, March and May recorded below average rainfall for the site and
November (03'), April, June, July, and August experienced average rainfall. Overall, the
site met the hydrologic criteria in a year of average climate conditions. However,
precipitation is not the primary hydrologic input for the site; therefore, it is expected that
the site would show the required flooding regardless of area rainfall totals.
2.4 Conclusions
Based on the hydrology analysis for Gauge 1, the data indicates that the gauge location
is flooding twice daily for the majority of the growing season, as is required. The
surface water elevations for Gauge 1 are comparable with Gauge 2 and Gauge 3.
NCDOT will continue to monitor the site for hydrology.
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3.0 VEGETATION: DEER CREEK
(YEAR 3 MONITORING)
3.1 Success Criteria
The vegetative marsh success of the wetland site will be determined in accordance with
NMFS Guidelines. Monitoring plots found to be located within the open water channel
will not be evaluated, and will not count toward the final count of plots. The vegetation
component of the wetland site will be deemed successful if the following criteria are
met:
At year five, the average of all plots should have a scale value of 5 (75%
vegetative cover) consisting of wetland herbaceous species, not including any
invasive species.
2. A minimum of 70% of the plots shall contain the target (planted) species.
3.2 Description of Species
The following marsh grass species were planted in the Wetland Restoration Area:
Spartina patens, Saltmeadow Cordgrass
Spartina alterniflora, Smooth Cordgrass
3.3 Results of Vegetation Monitoring
Table 2. Vegetation Monitoring Results

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1 5.0
2 5.0 ® p
3 0.0 bare round
4 0.0 bare ground
5 0.0 bare round
6 5.0
7 4.0 0 8 IN Cattails
8 0.0 bare round
9 4.0 ® p
10 5.0
11 5.0 ® p
12 5.0 N p p Cattails
13 5.0 0 0
14 open water
15 5.0 p
16 5.0 p ® Sci us americanus
17 5.0 p
18 0.0 bare round
19 5.0 p
20 4.0 ® ® Pol onum s p.
21 0.0 bare round
22 2.0 ® p
23 5.0 ® Pol onum s p.
24 5.0 ® Pol gonum sp.
25 5.0
26 4.0
27 4.0
28 5.0
29 5.0 p p
30 5.0 1 p Sci us Sp.

Frequency (Percentage of Plots 20.7% 69.0% 79.3%
with Desired Species)
Sum Scale Value 107.0
Total Number of Plots 29
Ve etative Cover (Scale Value) 3.7

3.4 Conclusions
Percent Frequency of Target Species 79.3%
Frequency of 70% required.
Vegetative Cover Scale Value 3.70
Scale Value of 5 required for year 5.
The site was tilled for compaction and replanted with 7,300 Smooth Cordgrass plants in
April 2002. The vegetation on the site has improved greatly. Frequency and coverage
are on track for year 3.
NCDOT will continue vegetation monitoring at the Deer Creek Mitigation Site.
4.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS
The 2004-monitoring year represents the fourth year of hydrology monitoring and the
third year of vegetation monitoring following replanting of the site.
Hydrologic monitoring of the three surface water gauges indicated that the site was
consistently inundated, with surface water levels varying with the tides. Vegetation
monitoring yielded a successful 79.3% frequency of target species and 3.70 vegetative
coverage. Field observations have shown that the site floods regularly.
NCDOT will continue hydrology and vegetation monitoring on the Deer Creek Mitigation
Site.
10
APPENDIX A
GAUGE DATA GRAPHS
APPENDIX B
SITE PHOTOGRAPHS
Photo 1

Photo 3
Deer Creek

Photo 2
Photo 4
Photo 5 Photo 6
2004
2004
Photo 7
APPENDIX C
VEGETATION PLANTING PLAN
RANDOM PLOT LOCATIONS
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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
MICHAEL F. EASLEY 1501 MAIL SERVICE CENTER, RALEIGH, N.C. 27699-1501 LYNDO TIPPETT
GOVERNOR SECRETARY
March 12, 2002
Mr. Doug Huggett
Division of Coastal Management
NC Department of Environment and Natural Resources
Post Office Box 27687
Raleigh, NC 27611-7687
Re: Bogue Sound (Weeks Property) Mitigation Site, Carteret County, Project No.
6.169005T, TIP No. R-2105 WM
Dear Mr. Huggett,
As you are aware, the Department has been actively monitoring Bogue Sound
(Weeks Property) Mitigation Site for the past 4 years. The mitigation site is located in
Cedar Point, Carteret County, NC. The mitigation project was intended to offset
permitted estuarine wetland impacts associated with several NCDOT projects. The
permitted impacts include 0.96 acre of high marsh dominated by black needlerush and
0.82 acre of low marsh dominated by smooth cordgrass.
The above referenced mitigation site required both vegetation and hydrologic
monitoring for at least 3 consecutive years. A site visit was conducted with
representatives from North Carolina Division of Coastal Management, U.S. Army Corps
of Engineers and N.C. Wildlife Resources Commission on April 27, 2001. It was agreed
't-that hydrologic monitoring of the site may be ceased.
The success criteria as approved by the regulatory agencies and defined in the
Final Plan for Bogue Sound Tidal Marsh Restoration Project dated February 1998 [a.k.a.
Bogue Sound Mitigation Site (Weeks Property)] is "The project will be deemed to be
successful if after a period of three (3) years following the completion of planting
vegetative coverage of native salt marsh species within the wetland restoration area is at
least 85% of the vegetative coverage recorded within the RME"
PHONE [phone] FAX [phone]
y
Based on 2001 monitoring data, the total estimated vegetative cover within the
marsh restoration area was 64%. Based on a survey of the reference marsh ecosystem in
1998 and 2001, the total estimated vegetative cover within the RME was 70%.
Therefore, vegetative cover within the marsh restoration area exceeds the minimum
acceptable cover mandated by the vegetative success criterion.
In conclusion and as per the 2001 Annual Monitoring Report for the mitigation
site, NCDOT recommends discontinuing any further monitoring activities. In a meeting
with Corps of Engineers representatives and resource agency representatives on March 7,
2002, agency personnel agreed that the site had achieved success and monitoring
activities could be discontinued.
If you have any questions about this project, please contact Mr. Randy Griffin,
Natural Systems Engineer, at [phone], ext. 294. Thank you for your continued
support and cooperation.
Sincerely,
'/. C4L X;i,-
V. Charles Bruton, Ph.D.
Assistant Branch Manager,
Project Development and
Environmental Analysis Branch
cc: file
Mr. Dave Timpy, COE
Mr. Scott McLendon, COE
Mr. David Franklin, COE
Ms/.Cathy Brittingham, CAMA
Aqr. John Hennessy, NCDWQ
Mr. Tom McCartney, USFWS
Mr. Ron Sechler, NMFS
Mr. Bill Moore, NCDOT
Ms. Kathy Matthews, EPA
Mr. David Cox, NCWRC
Mr. Randy Griffin, NCDOT-PD&EA
Mr. Ken Pace, NCDOT-REU
Mr. Neal Lassiter PE, NCDOT-Division 2 Engineer
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
MICHAEL F. EASLEY LYNDo TIPPETT.
GOVERNOR SECRETARY
January 7, 2002
Mr. David Timpy
U.S. Army Corps of Engineers J?
Wilmington Regulatory Field Office
Post Office Box 1890
Wilmington, North Carolina 28402-1890
Re: Deer Creek Mitigation Site, Carteret. County, Division 2, TIP Project R-2105WM .
Dear Mr. Timpy:
Please find enclosed the As-Built Report for the Deer Creek Mitigation Site located in
Carteret County. The Resident Engineer responsible for this project, Mr. Jason Peterson,
has. certified that the site was constructed according to construction plan sheets except for
one area, where the top of the berm between the detention area and the new marsh area
had to be moved to the north. This is shown on the enclosed plans. The site construction
was completed in March 31, 2001 and the planting was completed in May 2001.
For completeness purposes, the following information has been included with the
As-Built Report: (1) Letter of Construction Compliance, (2) As-Built Plan Sheet(s),
(3) Planting Zone and Vegetation Plot Map, (4) Gauge Location Map, and (5) Estimate of
Quantities.
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If you should have any questions or require additional information, please contact
Charles R. Cox, P.E.; Natural Systems Engineer, at [phone], Ext. 301.
Thank you for your continued support and cooperation on this project.
Sincerely,
1 w
V.C. Brut n, Ph.D., Assistant Manager
Project Development and Environmental
Analysis Branch
MAILING ADDRESS: TELEPHONE: [phone] LOCATION:
NCDEPARTMENT OFTRANSPORTATION. -.FAX: [phone] - TRANSPORTATION BUILDING
PROJECTDEVELOPMENT AND ENVIRONMENTAL ANALYSIS - 1 SOUTH WILMINGTON STREET -
1548MAIL SERVICE CENTER WEBSITE: WWW.DOH.DOT.$TATE.NC.US RALEIGH NC
RALEIGH NC 27699-1548.
i
STATE of NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
MICHAEL F. EASLEY P.O. BOX 25201, RALEIGH, N.C. 27611-5201 LYNDO TIPPETT
GOVERNOR SECRETARY
November 29, 2001
Charles Cox
Project Development and Environmental Analysis
1548 Mail Service Center
Raleigh, NC 27699-1548
RE: Project 6.169005T (R-2105AB-WM)
NC 24 Wetland Mitigation Site for Swansboro to Morehead City (Deer Creek)
Proiect Documentation
Dear Mr. Cox:
1
Pleased find attached the information you requested, including the letter of compliance
j and a copy of the contract for the above referenced project:
i
The project dates are as follows:
f Availibility Date: . . . . . . . . . . . . January 2, 2001
Work Started Date: . . . . . . . . . January 8, 2001
Permit Received-work inside 75' buffer: . February 5, 2001
Completion Date: . . . . . . . . . . . . March 31, 2001
1 Work Completed Date: .. . . .. .. .. April 24, 2001
Acceptance Date: . . ... . . . . . . . May 1, 2001
Project concerns include:
1. Delay in construction due to letting project to contract prior to obtaining
all necessary permits.
2. No check/revision was made for existing conditions (construction of initial
basin) prior to construction of this site.
Overall, we felt as though this project ran smoothly without a great deal of problems and
appreciate your help and coordination throughout. Should you require anything else,
please let me know.
265 SOUTH GLENBURNIE ROAD, NEW BERN, NORTH CAROLINA 28560
Phone: [phone] Fax: [phone]
Bid Unit Bid Actual Actual
Item Description Quantity Unit Price Amount Quantity Amont
1 Mobilization 1 LS 13,440.00 13,440.00 1 13,440.00
2 Clearing and Grubbing 1 LS 12,000.00 12,000.00 1 12,000.00
3 Grading 1 LS 78,830.00 78,830.00 1 78,830.00
4 Fine Grading 1 LS 10,000.00 10,000.00 1 10,000.00
5 Plain Rip Rap, Class B 232 TN 35.00 8,120.00 269.94 9,447.90
6 Filter Fabric 214 SY 3.00 642.00 215 645.00
7 Removal of Rip Rap 1 LS 1,000.00 1,000.00 1 1,000.00
8 Wetland Mitigation Signs 6 EA 400.00 2,400.00 0 -
9 Woven Wire Fence 920 LF 3.35 3,082.00 863 2,891.05
10 Metal Fence Gate 1 EA 319.00 319.00 1 319.00
11 4" Timber Fence Posts (8' long) 72 EA 18.80 1,353.60 60 1,128.00
12 5" Timber Fence Posts (8' long) 16 EA 52.50 840.00 14 735.00
13 Incidental Stone Base 200 TN 16.00 3,200.00 102.71 1,643.36
14 Temporary Silt Fence 300 LF 2.75 825.00 1278 3,514.50
15 Sediment Control Stone 10 TN 30.00 300.00 15.58 467.40
16 Seeding and Mulching 2 AC 1,350.00 2,700.00 1.27 1,714.50
17 Seed For Temporary Seeding 200 LB 4.55 910.00 20 91.00
18 Fertilizer for Temporary Seeding 0.5 TN 400.00 200.00 0.08 32.00
19 Floating Turbidity Curtain 15 SY 167.00 2,505.00 155.56 25,978.52
20 1/4" Hardware Cloth 20 LF 7.00 140.00 0 -
21 Construction Surveying 1 LS 4,000.00 4,000.00 1 4,000.00
22 Temporary Mulching 1 AC 800.00 800.00 0.39 312.00
Totals 147,606.60 168,189.23
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