19971058 All Versions_Complete File_20010108

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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR. DAVID MCCOY
GOVERNOR SECRETARY
January 8, 2001
Mr. Mr. Eric Alsmeyer
US Army Corps of Engineers
Raleigh Field Office
6508 Falls of the Neuse Road
Suite 120
Raleigh, North Carolina 27615
Dear Mr. Alsmeyer:
Subject: 2000 Annual Monitoring Report for the Gurley Tract Wetland Mitigation
Site, Greene County.
Please find enclosed the 2000 Annual Monitoring Report for the Gurley Tract Wetland
Mitigation Site in Wake County.
This report details the hydraulic and vegetation monitoring activities over the past year at
the site. Per the attached e-mail from Mr. Scott McLendon, USACE Wilmington, the
Department will wait to receive written comments from the regulatory and resource
agencies 30 days after receipt of the reports. A meeting to discuss any outstanding issues
on a site by site basis will be scheduled for March 8, 2001 at the Transportation Building
in Raleigh. <
If you should have any questions, please contact Mr. Randy Griffin, Natural Systems
Engineer, or Mr. Phil Harris, PE, Natural Systems Engineer, at [phone]. Thank
you for your continued support and cooperation.
Sincerely,
V. Charle Bruton, Ph.D.,
Assistant Branch Manager
Project Development and Environmental
Analysis Branch
Cc: w/ attachment
Scott McClendon, USACE (1)
John Hennessy, NCDWQ (1)
David Cox, NCWRC (1)
MAILING ADDRESS: TELEPHONE: [phone] LOCATION:
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS FAX: [phone] TRANSPORTATION BUILDING
1548 MAIL SERVICE CENTER 1 SOUTH WILMINGTON STREET
RALEIGH NC 27699-1548 WEBSITE: WWW.DOH.DOT.STATE.NC.US RALEIGH, NC
mitigation monitoring xeports
1
Subject: Mitigation Monitoring Reports
Date: Fri, 5 Jan 2001 17:10:14 -0500
From: [e-mail]
To: [e-mail], [e-mail], [e-mail],
[e-mail], Tom [e-mail]
CC: [e-mail], [e-mail]
Greetings,
As you are aware, NCDOT is in the process of sending the annual mitigation
monitoring reports out to the regulatory and resource agencies. Instead of
bringing our comments to a meeting with NCDOT as we have done in the past, we
have elected to provide our written comments to NCDOT for their review prior to
having any sort of meeting. If any outstanding issues remain after NCDOT has
had an opportunity to review our comments, we would plan to meet at the
Transportation Building in Raleigh on March 8, 2001.
As there is a time factor involved, we would like to provide our comments back
to NCDOT within 30 days of the receipt of the reports. To that end, a response
via e-mail is perfectly acceptable. Please provide your comments on these
reports to the appropriate NCDOT Project Manager with a copy to me in
Wilmington.
If you have any questions regarding this message, I may be reached at
910-251-4725. Point of Contact at NCDOT is Randy Griffin.
Thanks,
Scott McLendon
i of 1 01/08/2001 12:54 PM
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ANNUAL REPORT FOR 2000
Gurley Mitigation Site
Greene County
Project No. 8.T340306
TIP No. R-1023WM

Prepared By:
Natural Systems Unit & Roadside Environmental Unit
North Carolina Department of Transportation
December 2000

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TABLE OF CONTENTS
SUMMARY ...........................................................................................1
1.0 INTRODUCTION .....
................................................................................. 2

' 1.1 Project Description .........................................................................
1.2 Purpose ......................................................................................... 2
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 ............................................................... 8
......
2.4 Conclusions ...................................................................... ..
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' 3.0 VEGETATION ....................................
3.1 - Success Criteria .......................................................................... 11
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3.2 Description of Species .........................................................
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' 3.3 Results of Vegetation Monitoring ............................................
3
4 Conclusions 12
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.
.. .
' 4.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS .......................... 14
TABLES
Table 1 - Hydrologic Monitoring Results ..............................................................6
Table 2 - Vegetation Monitoring Results ............................................................. 12
1 FIGURES
' Figure 1 - Site Location Map ...............................................................................3
Figure 2 - Gauge Location Map ...........................................................................5
Figure 3 - Results Of Hydrologic Monitoring ........................................................7
' Figure 4 - 30-70 Percentile Graph ...........................................
Figure 5 - Vegetation Plot Map ................................................................. 35
5

APPENDICES
Appendix A - Depth To Groundwater Plots ..................................................14
Appendix B - Site Photos ........................................................................33
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The following report summarizes the monitoring and construction activities during
2000 at the Gurley Mitigation Site. Originally constructed in 1997, this site in
Greene County provides mitigation for several NCDOT projects in the Neuse
River Basin.
The Atlantic White Cedar area in the northwest corner of the site was planted in
early 1999. Following planting, an additional vegetation transect and two
additional monitoring gauges were installed to monitor this portion of the site.
At the request of the Corps of Engineers, the hydrologic monitoring requirements
of the site were changed from the requirements stated in the approved mitigation
plan. The riverine portion of the site must show saturation for 12.5% of the
growing season, while the non-riverine areas must show saturation within 12
inches of the surface for at least 8% of the growing season.
Hydrologic monitoring in 2000 showed ten of the sixteen gauges recorded
saturation for more than 12.5% of the growing season; two of these gauges are
located in riverine areas. The remainder of the gauges showed saturation for
less than 5% of the season. Vegetation monitoring yielded an average tree
density of 544 trees per acre, which is above the minimum success criteria.
NCDOT recommends that monitoring of the site continue.
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1.0 INTRODUCTION
1.1 Project Description
The Gurley Tract Mitigation Site is located in Greene County, approximately 12
miles northeast of Goldsboro (Figure 1). The site provides 170 acres of riverine
and non-riverine restoration and enhancement. Gurley Tract provides
compensatory mitigation for several projects in the Neuse River basin. The
following plant communities are included in the site: Coastal Plain bottomland
hardwood swamp, non-riverine wet hardwood forest, streambed Atlantic White
Cedar Forest, and Cypress/ Tupelo Swamp.
1.2 Purpose
In order to demonstrate successful mitigation, the site must achieve success for
five consecutive years. Success criteria are based on federal guidelines for
wetland mitigation. These guidelines stipulate criteria for both hydrologic
conditions and vegetation survival. The following report describes the results of
both the hydrologic and vegetation monitoring during 2000 at the Gurley Tract
Mitigation Site. Included is an analysis of data on the site itself as well as local
climate conditions during the growing season.
1.3 Project History
The site was initially monitored for both wetland hydrology and vegetation in
' 1998. Since the publication of the 1998 Annual Monitoring Report, additional
work has been completed on the mitigation site. Planting of Atlantic White Cedar
occurred in the winter of 1999. During the fall of 1999, remedial construction
I took place along the Nahunta Swamp Streambank. This construction involved
repairing washes along the streambank with stone flumes and matting.

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December 1997
January 1998
Spring 1998
May - November 1998
October 1998
February 1999
March - November 1999
August 1999
September & October 1999
October 2000
March - November 2000
Site Constructed
Site Planted
Monitoring Gauges Installed
Hydrologic Monitoring (1 yr.)
Vegetation Monitoring (1 yr.)
Zone 4 (Atlantic White Cedar Area) Planted
Hydrologic Monitoring (2 yr.)
Repairs to Erosion on Nahunta Swamp Streambank
Vegetation Monitoring (2 yr.)
Vegetation Monitoring (3 yr.)
Hydrologic Monitoring (3 yr.)

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FIGURE 1. SITE MAP

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2.0 HYDROLOGY
2.1 Success Criteria
' In accordance with federal guidelines for wetland mitigation, the success criteria
for hydrology states that the area must be inundated or saturated (within 12
inches of the surface) by surface or ground water for at least a consecutive
12.5% of the growing season. Areas inundated less than 5% of the growing
season are always classified as non-wetlands. Areas inundated between 5%
and 12.5% of the growing season can be classified as wetlands depending upon
factors such as the presence of hydrophytic vegetation and hydric soils.
Upon request of the US Army Corps of Engineers, the hydrologic monitoring
requirements for the Gurley Tract site have been altered from the original
mitigation plan. The new success criteria states that the riverine portions of the
site must be saturated within 12 inches of the surface for at least 12.5% of the
growing season. The non-riverine areas must be saturated for at least 8% of the
growing season. Monitoring will be conducted for a total of five years. The
riverine and non-riverine portions of the site are illustrated in Figure 2; riverine
areas on this map are shaded.
According to the Soil Conservation Service, the growing season in Greene
County extends from March 17 to November 15, approximately 244 days. A
consecutive 12.5% of the growing season for Gurley Tract would equal 30.5
1 days; a consecutive 8% would be equivalent to 19.5 days. Local climate must
represent average conditions for the area in order for the hydrologic data to be
valid.
2.2 Hydrologic Description
Nine monitoring gauges, one rain gauge, and two surface gauges were installed
in the spring of 1998 (Figure 2). Since the initial monitoring gauge installation,
seven additional gauges were installed. One surface water gauge was also
installed in the "mother's ditch" channel in the center of the site. The automatic
monitoring gauges record the depth to the groundwater level. Daily readings
were taken throughout the growing season.
Appendix A contains a plot of the water depth for each monitoring gauge and
surface gauge for 2000. Precipitation events are included on each graph as
bars. The precipitation data represents that of a North Carolina State Climate
Office rain gauge in Goldsboro (AG), North Carolina. This was the closest gauge
with current rainfall data to the mitigation site. However, an Infinity Rain Gauge
was installed on the site on May 1, 2000. Data from the Goldsboro (AG) Climate
Office was used until May 1 while the remainder of the 2000 rainfall data came
from the Infinity rain gauge onsite.

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Figure 2.Monitoring Gauge Locations
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2.3 Results of Hydrologic Monitoring
2.3.1 Site Data
The total number of consecutive days that the groundwater was within twelve
inches of the surface was determined for each gauge. This number was
converted into a percentage of the 244-day growing season. Table 1 presents
the hydrologic results for 2000.
Table 1
HYDROLOGIC MONITORING RESULTS
MARCH 17. gono - NOVFMRFR 15 9(nnO
Monitoring
Gauge <`5, 5- ° 8-12.5% >12.5% Actual % Dates of
Saturation
GW-1 ' ? 7.0 March 17-April 2
GW-2 ? 7.9 March 17-April 4
GW-3 ? 1 0.8 March 21-March 22
GW-4 '' ? 0.0 --
GW-5 ? 12.8 May 31-July 29
GW-6 ? 52.5 July 12-Nov 15
GW-7 ? 1.7 Sept 24-Sept 28
GW-8 ? 54.1 March 17-July 25
GW-9 ? 0.0 --
GW-10' ? 2.1 April 15-April 19
GW-11 ? 24.0 March 17-May 13
GW-12 ? 32.6 Aug 29-Nov 15
GW-13 '; ? 47.9 March 17-July 10
GW-14 ? ; 7.9 March 17-April 4
GW-15 ? 43.0 March 17-June 28
GW-16 ? 0.0 March 21
Figure 3 is a grajPhical,re resentation of the hydrologic monitoring results for
2000, which will &he the success of the mitigation site.
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FIGURE 3. HYDROLOGY MONITORING RESULTS
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Gauges that show a "flatline" indicate either a maximum or minimum range for
recording data. This does not necessarily mean there is a problem with the
gauge, for example, when a graph reaches the 2 inch line, the watertable is at
least 2 inches above the ground.
Specific Monitoring Gauge Problems: Data from GT-15 could not be retrieved
during March, May, June, September, or December due to high water. Data from
GT-8 could not be retrieved during September or December due to high water.
GT-10 was installed and set to begin recording on 3/30/00. The battery in GT-5
was replaced and set to record 3/30/00. The battery in GT-5 (stopped recording
4/7/00) was replaced and set to record 5/2/00. The battery in GT-9 (stopped
recording 4/2/00) was replaced and set to record 5/2/00. The battery in GTSG-2
(stopped recording 4/17/00) was replaced and set to record 5/2/00. The battery
in GT-5 (stopped recording 5/1/00) was replaced and set to record 5/31/00. The
battery in GT-9 (stopped recording 5/17/00) was replaced and set to record
5/31/00. The battery in GTSG-2 (stopped recording 5/2/00) was replaced and
set to record 5/31/00. GT-9 was replaced on 6/2/00 and was set to begin
recording on 6/29/00. GTSG-2 was replaced on 6/28/00 and was set to begin
recording on 6/29/00. GT-4, GT-11, GT-13 and GTSG-3 and were replaced and
set to begin recording on 12/7/00.
r 2.3.2 Climatic Data
Figure 4 is a comparison of 2000 monthly rainfall to historical precipitation for the
area. The two lines represent the 30th and 70th percentiles of monthly
precipitation for Goldsboro, NC. The bars are the monthly rainfall totals for 2000.
The historical data was collected by the National Climatic Data Center; the State
Climate Office of North Carolina provided the recent rainfall data.
Goldsboro received average rainfall with the exception of May, July, October,
and November which were all below average.

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2.4 Conclusions
' Four of the five (including two surface water gauges) gauges located in the
riverine area showed saturation for more than 12.5% of the growing season. An
additional five gauges located in the non-riverine areas were also saturated for
more than 12.5% of the growing season. Yet the remainder of the gauges only
showed saturation for less than 5% of the season. These results indicate
possible problems with some areas of the site. Additional monitoring should
indicate potential solutions.

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' 3.0 VEGETATION: GURLEY MITIGATION SITE (YEAR 3 OF 3)
3.1 Success Criteria
Success Criteria states that there must be a minimum of 320 trees per acre living
' for at least three consecutive years.
1 3.2 Description of Species
The following tree species were planted in the Wetland Restoration Area:
' Zone 1: Coastal Plain Bottom-Land Hardwood Forest
(18.86 acres)
Taxodium distichum, baldcypress
Fraxinus pennsylvanica, green ash
Quercus falcata var. pagodaefolia, cherrybark oak
Quercus michauxii, swamp chestnut oak
Quercus phellos, willow oak
Quercus nigra, water oak
Nyssa aquatica, water tupelo
Quercus lyrata, overcup oak
1 Zone 2: Non-Riverine Wet Hardwood Forest (17.57 acres)
Taxodium distichum, bald cypress
Fraxinus pennsylvanica, green ash
Quercus falcata var. pagodaefolia, cherrybark oak
Quercus michauxii, swamp chestnut oak
Quercus phellos, willow oak
Quercus nigra, water oak
Quercus alba, white oak
' Pinus serotina, pond pine
Platanus occidentalis, American sycamore
Nyssa aquatics, water tupelo
' Quercus lyrata, overcup oak
Liriodendron tulipfera, tulip poplar
Zone 3: Streambank Levee Forest (3 acres)
Quercus michauxii, swamp chestnut oak
' Quercus albs, white oak
Pinus serotina, pond pine
Platanus occidentalis, american sycamore
' Quercus lyrata, overcup oak
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Salix nigra, black willow
Betula nigra, river birch
Zone 4: Atlantic White Cedar Forest (7 Acres
Planted February 1999)
Chamaecyparis thyoides, Atlantic white cedar
Nyssa aquatica, water tupelo
Fraxinus pennsylvanica, green ash
Quercus falcata var. pagodaefolia, cherrybark oak
3.3 Results of Vegetation Monitoring
Table 2. Vegetation Monitoring Results
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1 2 11 13 7 2 8 13 5 3 1 63 63 680
3 9 1 4 8 10 6 1 2 41 45 620
T 1 1 7 8 1 2 2 2 1 1 25 31 548
T 12 3 2 2 2 21 2 1
T4
I 1 7 4 1 1 2 1 17 30 385
T5 5 6 3 4 6 2 26 37 478
ZONE 1 AVERAGE DENSITY 547
To determine tree density, 50' x 50' plots are installed immediately following
planting. The actual number of planted trees which occur within the plot are
counted. This number is equated to the number within each plot, which
represents 680 trees per acre (average). The survival monitoring number is
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TOTAL AVERAGE DENSITY 544

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compared to the planted number to obtain survival percentage. This percentage
is applied to the 680 trees per acre to obtain an estimated tree per acre for the
site. (Density = monitoring count / planted trees x 680)
Site Notes:
Zone 1: Other species noted: red cedar, aster, sweetgum, fennel, goldenrod, sumac, baccharis,
broomsedge, woolgrass, black willow, cane, briars, muscadine, plume grass, juncus, carex and
red maple. Heavy cover also noted in plot T1. 2 feet of standing water in plot T4, 6 -8 inches
' standing water in T5. Beaver activity noted in plot T4.
Zone 2: Other species noted: aster, sweetgum (6'-8'), broomsedge and sicklepod.
Zone 3: Trees surviving along levee. Trees in this zone are not counted due to the limited size of
the zone.
Zone 4: Other species noted: black willow, juncus, smartweed, alder, cattails, red maple, juncus
and volunteer oaks. Deer are bedding in plot 1. Vehicle traffic noted in plot T2.
3.4 Conclusions
Of the 426 acres of this site, approximately 46 acres involved tree planting.
' There were 6 test plots and 5 transects established throughout the planting
areas. The vegetation monitoring of the planted areas revealed an average
density to be 547 trees per acre for zone 1, 599 trees per acre for zone 2 and
453 trees per acre for zone 4. All zones are well above the minimum
requirement of 320 trees per acre.

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4.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS
• Monitoring of site hydrology and vegetation will continue in 2001.
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APPENDIX A
DEPTH TO GROUNDWATER PLOTS
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SITE PHOTOS
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,
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
MICHAEL F. EASLEY LYNDO TIPPETT
GOVERNOR SECRETARY
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS BRANCH
TRANSMITTAL LETTER
TO: Eric Alsmeyer - USACE Raleigh Field Office
Chris Milischer - EPA
John Henessey - NC DWQ
Travis Wilson- NC WRC
Gary Jordan, US FWS
I AM SENDING YOU:
AUG 2 6 2004
WATER QUALIFY SLC 11ON
COPIES DESCRIPTION
1 Design Plans for Remedial Work at Wiggins Mill Mitigation Site; Wilson
Count
THESE ARE TRANSMITTED:
FOR YOUR APPROVAL SIGNATURE
X AS REQUESTED FOR REVIEW/COMMENT
FOR YOUR INFORMATION TAKE APPROPRIATE ACTION
FOR CORRECTION FOR YOUR FILE
COMMENTS:
Enclosed are the Design Plans for the remediation activities that were discussed at our site visit
on April 14, 2004. This further documents proposed structure placement, elevations, etc.
associated with the degraded sections of thread A, repair of un-vegetated sections of site, &
further grading in the creation section that was requested by agencies in attendance around
monitoring gauge 9. This remediation work is proposed for mid-late September and is based on
the survey/site assessment document that was reviewed/discussed in detail back in April. Any
questions, let me know. [phone]
SIGNED:
Randy . Griffin Al
MAILING ADDRESS:
NC DEPARTMENT OF TRANSPORTATION
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS
1548 MAIL SERVICE CENTER
RALEIGH NC 27699-1548
TELEPHONE: [phone]
FAX: [phone]
WEBSITE. WWW.DON.DOT.STATE.NC.US
DATE: August 25, 2004
WETLAND, 1 ?,pT r=pnUP
LOCATION:
TRANSPORTATION BUILDING
1 SOUTH WILMINGTON STREET
RALEIGH NC
[WBS ELEMENT: 34362.4.1 R-1023WM
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