19970856 Ver 1_Complete File_19991203

DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
P.O. BOX 1890
WILMINGTON, NORTH CAROLINA 28402-1890
IN REPLY REFER TO
Regulatory Division
Action ID No. 1995
Mr. John Dorney
NCDENR

,R
November 30, 1999

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North Carolina Division of Water Quality
Wetlands Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Dear Mr. Domey:

Enclosed is a permit modification request by the North Carolina Department of Transportation
(NCDOT) for Department of the Army (DA) authorization and a State Water Quality
Certification to:
1. Pile jetting, temporary fill, and associated cleanup in an additional 2.325 acres of
Section 10 and 404 Wetlands adjacent to the Croatan Sound, within a sediment containment area
at 19 bent locations in a black needle rush marsh community on the eastern side of the permitted
project. An additional 0.524 acres of impact will be associated with 1,903 linear feet of matting
to access the containment areas, for a total of 2.849 acres. NCDOT proposes to contain the jetted
sediment using silt fence and hay bales. A lightweight Caterpillar 307 excavator will then
remove the material to a low ground pressure tracked loader. The material will be ultimately
transported to an offsite upland sediment containment area via wooden mats (10 feet wide)
placed on the marsh.
Attached to the public notice is a monitoring plan for the recovery of the disturbed marsh area
impacted by the matted construction access road.
2. Extend the permitted Tee road in Croatan Sound by 60 feet. The results of a test pile
program indicated the permitted proposal was not sufficient for all the bent construction
activities on the eastern side of the permitted project. The test pile program revealed that longer,
heavier piles would be needed on the east side.
3. Construct a temporary floating moorage facility within Croatan Sound at load-out
trestle bent number four. The temporary facility will be used to dock construction vessels as well
as on and off load construction equipment and workers. The proposed facility will be 20 x 20
feet and require the installation of six 12" steel cylinder pipes.
4. Install mooring piles and temporary stabilization measures within Croatan Sound at
load-out trestle bents 6, 8, 11, 12 and 13. The 36 inch steel mooring piles will be located at bents
10 and 13 and will be used while loading and unloading construction equipment and supplies.
"H" beam stabilizers at bents 6, 8, 10, 11, 12 and 13 are requested for safety.
This activity is associated with the Department of the Army permit issued on March 5, 1998,
for the proposed widening of approximately 10 miles of US 64-264, including constructing a new
bridge over the Croatan Sound and adjacent marshes, from US 64-264 west of Manns Harbor to
NC 345 south of Manteo, in Dare County, North Carolina (TIP No. R-2551, Federal Aid Project
No. NHF-64(6), State Project No. 8T051401). Your receipt of this letter verifies your acceptance
of a valid request for certification in accordance with Section 325.2(b)(ii) of our administrative
regulations.
We are considering authorizing the proposed activity pursuant to Section 404 of the Clean
Water Act, and we have determined that a water quality certification is required under the
provisions of Section 401 of the same law. A Department of the Army permit will not be granted
until the certification has been obtained or waived.
In accordance with our administrative regulations, in most cases, 60 days after receipt of
a request for certification is a reasonable time for State action. Therefore, if you have not
acted on the request, or asked for an extension of time, by January 28, 2000, the District
Engineer will deem that waiver has occurred.
Thank you for your time and cooperation. Questions or comments may be addressed
to Mr. Michael F. Bell at the Washington Regulatory Field Office, telephone [phone],
extension 26.
Sincerely,

E. David Franklin
Special Projects Manager
Enclosure
2
Copies Furnished (without enclosure):
Mr. Doug Huggett
Division of Coastal Management
1638 Mail Service Center
Raleigh, North Carolina 27699-1638
/ C, 5 54
Nov 1 6 1999
STATE OF NORTH CAROLINA REGULATORY 3RAKH
DEPARTTYMNT OF TRANT SPORTATION
JANIES 3. HUNT JR. DAVID McCOY
GOVENOR SECRETARY
November 12, 1999
Michael F. Bell,-P.W.S., Regulatory Project Manager
U. S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. Box 1000
Washington, North Carolina 28779
Dear Mr. Bell:
SUBJECT: Proposed Minor Modification to Department of the Army Permit
No. 199502334: Irnprovements to US 64-264, Including the construction of a new Croatan Sound
bridge, from west of Manns Harbor to NC 345, south of Manteo, in Dare County; Federal Aid
Project No. N11F-64 (6); State Project No. 8.T051401; TIP No. R-2551.
The Department of Transportation requests that the existing DOA Permit be modified to (1)
authorize pile jetting and cleanup; and (2) authorize an extension of the currently permitted Tee
road by 60.0 feet; and 3) authorize a temporary floating dock; and 4) authorize mooring piles and
stabilization measures for the temporary load-out trestle; 5) authorize a minimal use of jetting to
loosen temporary trestle piles for removal on both the west and east sides.
ylodification #1: Authorize pile jetting and cleanup
The North Carolina Department of Transportation (NCDOT) is currently constructing a new
bridge over the Croatan Sound. As you are aware, the piles are being placed by the construction
method known as jetting. Jetting`produces a mixture of sediment and water that is dispersed into
the marsh adjacent to the bridge-bents. You will also recall that the NCDOT has attempted to
institute several_methods of capturing the material and removing it from the marsh during the
jetting process. This was an attempt at instantaneous cleanup to prevent the sediment from a
prolonged stay"within the jurisdictional area. These methods included driving 54" cassions
around each pile-to capture the material and then pumping the material to a settling basin. Total
cost for this method for two bride bents was approximately $1,800,000. AdditionaIIy,:this
method failed to remove the material satisfactorily.
A-tempts at r movinog the materiak-immediately after deposition failed repeatedly. Subsequently,
he Department elected to contain the material and remove it after the piles were in place. The
getting sediment an the west side of the bridge was eventually removed using a wooden mat road,
C'aterpillar 3t)7 lightweight excavator and a standard front end loader.
The vCDOT has evaluated several options for dealing with the jetting sediment on the east side.
First, an alternative method of installing the piles was investigated. This foundation redesign
was not found to be feasible due to time and financial constraints. Preliminary estimates indicate
that changing the method of construction would result in a 26-week delay for redesign, retooling,
equipment acquisition, etc. It would also result in an increased cost of approximately
S 10,000,000. Therefore, this option! was not considered feasible.
Second, the NCDOT evaluated using the temporary work trestle and a crane to clean up and
remove the sediment. This method is described as follows:
-Clean up approximately 200 CY at each bent, 19 bents involved.
-Sediment removal with a crane with clamshell bucket
-Train will haul material in "dumpsters" or in modified rail cars to a barge at waters edge.
-Material will be placed on the barge by a barge-mounted crane.
-Material barge will be pushed by tugboat to the Load Out Trestle on the Mann's Harbor side.
-Material will be offloaded at the Load Out Trestle by the straddle crane and placed into awaiting
trucks for disposal.
-Straddle crane will load empty containers back onto material barge.
-Barge will be pushed back to the Roanoke Island side for the next bent(s) cleanup.
-Bent clean, up estimated at 2 days per bent, 38 days, another 2 to 12 days for equipment
acquisition and fabrication, (i.e. clamshell bucket, dumpsters, rail cars, etc)
The assignment of dollar costs to the clean up could be in the range of $7,000 to more than
S 10,000 per day.
There is the possibility that the rail and crane trestle system could be extended to non-
jurisdictional-areas (i.e. near the end bent) much later in the course of construction of the bents
in the affected wetlands. The material could be transferred to the end bent as opposed to a barge
and pushed across the sound. The ,cost of any extension would be borne by the DOT; the
contractor's original submittal/plan did not extend the trestle to the end bent. The contractor's
intention all-along has been to 'service' construction of the bridge in these east side wetlands by
the trestle whereby supplies are brought in from awaiting barges and the like. The construction
of the trestle is designed to take place in a staged sequence. In this sequence each section of
trestle is completed only as needed. This process will start in at the farthest bent from shore
(working from barges) and work towards land. Therefore, it would take several months to reach
the point where it would be feasible to extend the trestle to non jurisdictional area. It is
estimated that-direct cost (labor, materials, equipment) associated with trestle extension would
be approximately $50,000 to extend another 160 feet. This would also trigger additional indirect
costs of approximately $100,000 associated with manipulating the contractors scheduling and
labor force allocations.
DIRECT UVIPACTS
Trestle C1ean7Up $500,000 to $1,000,00.0.
2
(NDIRECT,'NIPAC"TS
nestle Ciea: o -2,000,000 to x=;000,000
Lidirect impacts are v?!:v difficult measure at this time. It is estimated that 40 to 50 days will be
required for,the clean up. This timmeframe takes resources away from bridge construction. These
resources would not be earning "the contractor the anticipated revenues within his earnings
schedule. This timefrarne has the- high potential to disrupt operations following pile installation.
Pile cap construction could be idled/delayed, thereby effecting girder erection and deck
construction. These impacts cari-include idled equipment and manpower and increased storage
and transportation costs for soon to be fabricated items such as girders and bearings. The idled
condition may force the contractor to take measures not originally planned for to maintain or
recover his construction schedule. The vernacular for these impacts are disruption of works, loss
of productivity, accelerative measures, extended overhead, loss of profit and loss of interest on
earnings.
TOTXL. IMPACT for Trestle Cleanup: Direct + Indirect 52 500 000 to $4,000,000
The Department feels that this method is unacceptable; at even the most conservative estimate of
52,500,000-the extended delays and extravagant costs make this alternative non-feasible.
Therefore, the NCDOT proposes to contain the sediment using silt fence and hay bales as was
allowed on the west side. The material will then be removed by a lightweight Caterpillar 307
excavator and a low ground pressure tracked loader. These lightweight pieces of equipment will
be transported to the sediment containment area via wooden mats placed on the ground. The
wooden mats will be ten feet wide. The total length of matting will be 1,903.0 feet from bridge
bent 249 to the end bent (high ground) with an additional 20.0 feet of perpendicular matting per
bent to access the containment area Cleanup methodology will consist of utilizing the
lightweight- excavator to recover the material and place it in a small pile within the containment
area. The low ground pressure tracked loader will then transport the material across the mat road
to high ground to be disposed of. Total area involved in sediment containment and cleanup will
be 2.325 acres.
The amount of pressure exerted on the mat road is expected to be significantly less than was
exerted on the mat road during sediment clean up on the west side. This is due to the utilization
of a low ground pressure tracked loader as opposed to a standard front end loader. Therefore, it
is reasonable to conclude that these will be less settling associated with the use of matting. The
total area affected by matting will be 0.524 acres. The NCDOT is committed to a full
monitorin-d of the affected area tc insure that the marsh recovers. Monitoring will be conducted
in accordance with attached monitoring plan. Additionally, the NCDOT has acquired a property
that is currently being developed ,as a mitigation site. The site is near Stumpy Point, NC and will
involve the restoration of a black needle rush (Juncus roemerianus) salt marsh community. The
NCDOT fully expects the a.ffectedmatting area to recover. However, the development of the
Stumpy Point mitigation site is intended to serve as a "safety net" should monitoring of the
cleanup area reveal that the recovery is not successful.
3
Modification # 2: authorize therrPn?t?? ?f thee currently ttertni_tted Tee road by 60.0 feet
l you recall the Tee road is a section of temporary work trestle perpendicular to the bridge
ahariment which allows the contractor to get as close as possible to the bent for pile installation.
The current design for the Tee road is a 60.0-foot long section of Tee road extending
perpendicularly from the temporary work trestle to the bridge bents. The trestle was proposed
the minimum-practical safe distance from the bridge with the 60.0 foot Tee road extending out to
the bridge to. allow a crane to stretch from the Tee road to the bridge bent. However, after a test
pile program -conducted at the beginning of project construction, it was found that the 60.0 foot
Tee road was not sufficient for all of the bent construction activities on the east side.
The test pile program revealed that longer, heavier piles would be needed on the east side than
were utilized-on the west side. Pile lengths were changed from an average of 35 meters (115.0
feet) to an average of 42 (138.0 feet) meters in length. The distance that has to be stretched by
the crane, coupled with the heavier and larger load, produces a situation that may cause
equipment failures and compromise personal safety of workers. Therefore, the Department
requests that.the authorization be granted to extend the Tee road an additional 60.0 feet. The
proposed extension will require:four additional 24" pipe piles. Please note that these piles are
temporary at.each location. They will be in place only as long as pile driving activities are
taking place at that bent. The Tee road will then be dismantled and moved to the next bent.
Please see the attached construction drawings for reference.
Modification 43• Authorize a temporary floating dock
The contractor has requested permission to build a temporary floating dock at load-out trestle
bent number-four. The temporary floating dock will be used to dock construction vessels as well
as on and off load construction equipment and workers. The dock will be approximately 6.096
meters x 6.096 meters (20.0 feet x 20.0 feet). This will require the installation of six 0.304-meter
(12.0-inch) steel cylinder piles. Please see the attached construction drawings for reference.
Modification #4: Authorize mooring piles and temporary rary trestle stabilization measures
The contractor has requested permission to construct four 0.919-meter (36.0-inch) steel mooring
piles at bent-thirteen of the load-out trestle. The-mooring piles will be used for construction
barges. The barges will tie to the mooring piles while loading or unloading construction
equipment and supplies. This will-result in an increased demand and stress on the temporary
trestle. Therefore, we are also requesting authorization to install H-beams for stabilization at
load-out trestle bents 6, 8, 10, 11; '12, and 13. Additionally, two 0.6096-meter (24.0-inch) steel
cylinder piles'will be installed at load-out trestle bent number 10. Designs for the stabilization is
included in the construction drawings.
4

Modification #5: Authorize minimum use of to loosen iftry trestle 11ii s
The original plan for the utilization of this trestle called for the temporary support piles to be
vibrated out and for the trestle to be moved to the east side of the Croatan Sound. However,
recent attempts to remove thetemporary piles by vibration have been unsuccessful.
The NCDOT has determined that the piles can be loosened and removed with a minimal use of
"jetting": A very minor amount of material may surface from the pile loosening. Any material
produced?by this operation will be raked into the void left by the removed piling. If there is not
enough material to fill the void, the hole will be filled to the elevation of the adjacent ground
with clean sand. Per our telephone conversation of September 14, 1999, the NCDOT will utilize
the above-described technique to remove one piling. After removal, the USACE and the
NCDCM will be consulted on site to determine if this method of piling removal is satisfactory.
Your consideration is requested in processing this proposal as a "minor" modification. An
expedited approval is essential to meeting critical project scheduling. Please call me if I can
provide any additional information.
Sincerely,
D. R. Conner, P. E.
Division Enginner
T. Linds ddick, Jr.
Division Environmental Officer-Division One
CC: Mr. R. E. Capehart, P. E.
Mr. R. W. Midgett, P. E.
Mr. Frank Jennings, NCDCM
Mr.-David Cox, NCWRC
Ms. Sarah Winslow, NCDMF
Mr. John Hennessy, NCDWQ
Mir. Ron Sechler, NNE
Mr. Doug Huggett, NCDCM
Mr. Randy K. Wise, P. E.
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Monitoring Plan for theLfecovery of the disturbed marsh area adjacent to the new
Croatan Sound Bridge
The plan;consists of monitoring the disturbed site to determine the success of vegetative recovery
occurring within it. The existing undisturbed marsh, dominated b,. black needle rush (Juncos
roemerianus), adjacent to the-disturbed site will be evaluated in January, 2000, and will be used
as a reference marsh to determine the degree of recovery. Three plots measuring 1 meter by 1
meter will be selected randomly and the percent aerial vegetative coverage will be evaluated and
used as a baseline reference..
The disturbed area will be allowed to recover naturally from existing plant material and seed
source present. Vegetative monitoring will be conducted annuall% beginning in January of 2000.
The monitoring will consist of randomly selecting 12 plots in the disturbed area, measuring 1
meter by 1 meter, and comparing the level of regeneration to the reference marsh. The area will
be evaluated after one full growing season in September of 2000 to determine if replanting with
black needle rush will be necessary. If replanting is deemed necessary, NCDOT will prepare a
planting plan and submit it to the USACE and the NCDCM for approval. All efforts will be
made to utilize a local seed source if plantings are required. If there are any areas where
compaction has prevented natural regeneration from occurring, hand labor will be used to scarify
the area to remediate the compaction. Areas that require scarification will be planted with black
needle rush and monitored accordingly.
As required, there will be a zero tolerance for phragmites (Phragmites communis). If the
presence of this species is detected, measures will be taken immediately to eradicate this species
from the site.
Monitoring reports will be submitted by December 31St of each year for a period of five years.
The disturbed area will be considered recovered when aerial vegetative coverage has been
determined to meet or exceed 90% of the coverage found in the reference marsh. If after a
period of three years, it is determined that recovery efforts are not succeeding, the North
Carolina Department of Transportation will consult with the U. S. Army Corps of Engineers and
the North Carolina Division'6,f Coastal Management to discuss necessary remedial action.

a:
DEPARTMENT OF THE ARMY
Wilmington District, Corps of Engineers
Post Office Box 1890
Wilmington, North Carolina 28402-1890
ACTION ID No. 199502334
PUBLIC NOTICE
PERMIT MODIFICATION
December 2, 1999
THE NORTH CAROLINA DEPARTMENT OF TRANSPORTATION (NCDOT), DIVISION
OF HIGHWAYS, Post Office Box 25201, Raleigh, North Carolina 27611-5201, was issued, on
March 5, 1998, a Department of the Army (DA) permit TO FILL 13.22 ACRES OF SECTION 404
WETLANDS, MECHANIZE LAND CLEAR 3.83 ACRES OF SECTION 404 WETLANDS,
DRAIN 2.79 ACRES OF SECTION 404 WETLANDS, AND FILL 0.05 ACRES OF OPEN
WATERS OF THE UNITED STATES ADJACENT TO THE CROATAN SOUND, SPENCER'S
CREEK AND UNNAMED TRIBUTARIES. THE NCDOT PROPOSES TO WIDEN
APPROXIMATELY 10 MILES OF U.S. 64-264, INCLUDING CONSTRUCTING A NEW
BRIDGE OVER THE CROATAN SOUND AND ADJACENT MARSHES, FROM
US 64-264 WEST OF MANNS HARBOR TO NC 345 SOUTH OF MANTEO, IN DARE
C G UNTY, NORTH CAROLINA, TIP NO. R-2551, FEDERAL AID PROJECT NO.
NHF-64(6), STATE PROJECT NO. 8.T051401. The permittee has applied for a modification
to the permit to:
1. Pile jetting, temporary fill, and associated cleanup in an additional 2.325 acres of Section 10
and 404 Wetlands adjacent to the Croatan Sound, within a sediment containment area at 19 bent
locations in a black needle rush marsh community on the eastern side of the permitted project. An
additional 0.524 acres of impact will be associated with 1,903 linear feet of matting to access the
containment areas, for a total of 2.849 acres. NCDOT proposes to contain the jetted sediment using
silt fence and hay bales. A lightweight Caterpillar 307 excavator will then remove the material to a
low ground pressure tracked loader. The material will be ultimately transported to an offsite upland
sediment containment area via wooden mats (10 feet wide) placed on the marsh.
Attached to this public notice is a monitoring plan for the recovery of the disturbed marsh area
impacted by the matted construction access road.
2. Extend the permitted Tee road in Croatan Sound by 60 feet. The results of a test pile program
indicated the permitted proposal was not sufficient for all the bent construction activities on the
eastern side of the permitted project. The test pile program revealed that longer, heavier piles would
be needed on the east side.
2
3. Construct a temporary floating moorage facility within Croatan Sound at load-out trestle bent
number four. The temporary facility will be used to dock construction vessels as well as on and off
load construction equipment and workers. The proposed facility will be 20 x 20 feet and require the
installation of six 12" steel cylinder pipes.
4. Install mooring piles and temporary stabilization measures within Croatan Sound at load-out
trestle bents 6, 8, 11, 12 and 13. The 36 inch steel mooring piles will be located at bents 10 and 13
and will be used while loading and unloading construction equipment and supplies. "H" beam
stabilizers at bents 6, 8, 10, 11, 12 and 13 are requested for safety.
Construction plans are included with this public notice along with the applicant's modification
request that includes an analysis of alternatives for the pile jetting and associated cleanup.
The State of North Carolina will review this public notice to determine the need for the applicant
to obtain any required State authorization. No Department of the Army (DA) permit will be
modified until the coordinated State viewpoint on the proposal has been received and reviewed by
this agency, nor will a DA permit be modified until the North Carolina Division of Environmental
management (NCDEM) has determined the applicability of a Water Quality Certification as
required by PL 92-500.
This modification is being considered pursuant to Section 404 of the Clean Water Act
(33 U.S.C. 1344). Any person may request, in writing within the comment period specified in
the notice, that a public hearing be held to consider this application. Requests for public hearing
shall state, with particularity, the reasons for holding a public hearing.
The District Engineer has consulted the latest published version of the National Register of
Historic Places for the presence or absence of registered properties, or properties listed as being
eligible for inclusion therein, and this worksite is not a registered property or property listed as
being eligible for inclusion in the Register. Consultation of the National Register constitutes the
extent of cultural resource investigations by the District Engineer, and he is otherwise unaware of
the presence of such resources. Presently, unknown archeological, scientific, prehistorical, or
historical data may be lost or destroyed by work under the requested permit modification.
The District Engineer is not aware, based on available information, that the proposed activity
will affect species, or their critical habitat, designated as endangered or threatened pursuant to the
Endangered Species Act of 1973.
This notice initiates the Essential Fish Habitat (EFH) consultation requirements of the
Magnuson-Stevens Fishery Conservation and Management Act. The DE's initial determination is
that the proposed project would not adversely impact EFH or associated fisheries managed by the
South Atlantic or Mid Atlantic Fishery Councils or the NMFS.

3
The decision whether to issue a permit modification will be based on an evaluation of the
probable impacts, including cumulative impacts, of the proposed activity and its intended use on the
public interest. Evaluation of the probable impacts which the proposed activity may have
on the public interest requires a careful weighing of all those factors which become relevant in each
particular case. The benefits which reasonably may be expected to accrue from the proposal must
be balanced against its reasonably foreseeable detriments. The decision whether to authorize a
proposal, and if so the conditions under which it will be allowed to occur, are therefore determined
by the outcome of the general balancing process. That decision should reflect the national concern
for both protection and utilization of important resources. All factors which may be relevant to the
proposal must be considered including the cumulative effects thereof. Among those are
conservation, economics, aesthetics, general environmental concerns, wetlands, cultural values, fish
and wildlife values, flood hazards and flood plain values (in accordance with Executive Order
11988), land use, navigation, shore erosion and accretion, recreation, water supply and conservation,
water quality, energy needs, safety, food and fiber production, mineral needs, considerations of
property ownership, and, in general, the needs and welfare of the people. For activities involving
the placement of dredged or fill materials in waters of the United States, a permit modification will
be denied if the discharge that would be authorized by such modification would not comply with the
Environmental Protection Agencies' 404(b)(1) guidelines. Subject to the preceding sentence and
any other applicable guidelines or criteria, a permit modification will be granted unless the District
Engineer determines that it would be contrary to the public interest.
Generally, the decision whether to issue this Department of the Army (DA) permit modification
will not be made until the North Carolina Division of Water Quality (NCDWQ) issues, denies, or
waives State certification required by Section 401 of the Clean Water Act. The NCDWQ considers
whether or not the proposed activity will comply with Sections 301, 302, 306, and 307 of the Clean
Water Act. The application and this public notice for the DA permit serves
as application to the NCDWQ for certification.
Additional information regarding the Clean Water Act certification may be reviewed at the
offices of the North Carolina Division of Water Quality (NCDWQ), Wetland/401 Unit, 4401 Reedy
Creek Road, Raleigh, North Carolina 27607. Copies of such materials will be furnished to any
person requesting copies upon payment of reproduction costs.
All persons desiring to make comments regarding the application for Clean Water Act
certification should do so in writing delivered to the North Carolina Division of Water Quality
(NCDWQ), Wetland/401 Unit, 1621 Mail Service Center, Raleigh, North Carolina 27699-1621, on
or before December 27,1999, Attention: Mr. John Dorney.
Written comments pertinent to the proposed work, as outlined above, will be
received in this office, Attn: Michael F. Bell, Washington Regulatory Field Office, Post
Office Box 1000, Washington, North Carolina 27889-1000, until 4:15 p.m., January 3, 2000,
or telephone [phone], extension 26.

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STATE OF NORTH CAROLINA c!S?r?SOv a
DEPARTMENT OF TRANSPORTATION
JA2vfES B. HUNT JR.
GovENOR
November 12, 1999
Michael F. Bell, P.W.S., Regulatory Project Manager
U. S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. Box 1000
Washington, North Carolina 28779
Dear Mr. Bell:
DAVID McCOY
SECRETARY
SUBJECT: Proposed Minor Modification to Department of the Army Permit
No. 199502334: Improvements to US 64-264, Including the construction of a new Croatan Sound
bridge, from west of Mans Harbor to NC 345, south of Manteo, in Dare County; Federal Aid
Project No. NBI-64 (6); State Project No. 8.T051401; TIP No. R-2551.
The Department of Transportation requests that the existing DOA Permit be modified to (1)
authorize pile jetting and cleanup; and (2) authorize an extension of the currently permitted Tee
road by 60.0 feet; and 3) authorize a temporary floating dock; and 4) authorize mooring piles and
stabilization measures for the temporary load-out trestle; 5) authorize a minimal use of jetting to
loosen temporary trestle piles for removal on both the west and east sides.
Modification 1,1: Authorize pile jetting and cleanup
The North Carolina Department of Transportation (NCDOT) is currently constructing a new
bridge over the Croatan Sound. As you are aware, the piles are being placed by the construction
method known as jetting. Jetting produces a mixture of sediment and water that is dispersed into
the marsh adjacent to the bridge bents. You will also recall that the NCDOT has attempted to
institute several methods of capturing the material and removing it from the marsh during the
jetting process. This was an attempt at instantaneous cleanup to prevent the sediment from a
prolonged stay within the jurisdictional area. These methods included driving 54" cassions
around each pile to capture the material and then pumping the material to a settling basin. Total
cost for this method for two bridge bents was approximately $1,800,000. AdditionalIy,'this
method failed to remove the material satisfactorily.
Attempts at removing the material immediately after deposition failed repeatedly. Subsequently,
the Department elected to contain the material and remove it after the piles were in place. The
jetting sediment on the west side of the bridge was eventually removed using a wooden mat road,
a Caterpillar 307 lightweight excavator and a standard front end loader.
The NCDOT has evaluated several options for dealing with the jetting sediment on the east side.
First, an alternative method of installing the piles was investigated. This foundation redesign
was not found to be feasible due to time and financial constraints. Preliminary estimates indicate
that changing the method of construction would result in a 26-week delay for redesign, retooling,
equipment acquisition, etc. It would also result in an increased cost of approximately
$10,000,000. Therefore, this option was not considered feasible.
Second, the NCDOT evaluated using the temporary work trestle and a crane to clean up and
remove the sediment. This method is described as follows:
-Clean up approximately 200 CY at each bent, 19 bents involved.
-Sediment removal with a crane with clamshell bucket
-Train will haul material in "dumpsters" or in modified rail cars to a barge at waters edge.
-Material will be placed on the barge by a barge-mounted crane.
-Material barge will be pushed by tugboat to the Load Out Trestle on the Mann's Harbor side.
-'Material will be offloaded at the Load Out Trestle by the straddle crane and placed into awaiting
trucks for disposal.
-Straddle crane will load empty containers back onto material barge.
-Barge will be pushed back to the Roanoke Island side for the next bent(s) cleanup.
-Bent clean up estimated at 2 days per bent, 38 days, another 2 to 12 days for equipment
acquisition and fabrication, (i.e. clamshell bucket, dumpsters, rail cars, etc)
The assignment of dollar costs to the clean up could be in the range of $7,000 to more than
$10,000 per day.
There is the possibility that the rail and crane trestle system could be extended to non-
jurisdictional areas (i.e. near the end bent) much later in the course of construction of the bents
in the affected wetlands. The material could be transferred to the end bent as opposed to a barge
and pushed across the sound. The cost of any extension would be borne by the DOT; the
contractor's original submittal/plan did not extend the trestle to the end bent. The contractor's
intention all along has been to 'service' construction of the bridge in these east side wetlands by
the trestle whereby supplies are brought in from awaiting barges and the like. The construction
of the trestle is designed to take place in a staged sequence. In this sequence each section of
trestle is completed only as needed. This process will start in at the farthest bent from shore
(working from barges) and work towards land. Therefore, it would take several months to reach
the point where it would be feasible to extend the trestle to non jurisdictional area. It is
estimated that direct cost (labor, materials, equipment) associated with trestle extension would
be approximately $50,000 to extend another 160 feet. This would also trigger additional indirect
costs of approximately $100,000 associated with manipulating the contractors scheduling and
labor force allocations.
DIRECT TMPACTS
Trestle Clean Up $500,000 to $1,000,000.
2
INDIRECT ni TPA T
Trestle Clean Up 52,000,000 to S3,000,000
Indirect impacts are very difficult measure at this time. It is estimated that 40 to 50 days will be
required for the clean up. This timeframe takes resources away from bridge construction. These
resources would not be earning the contractor the anticipated revenues within his earnings
schedule. This timeframe has the high potential to disrupt operations following pile installation.
Pile cap construction could be idled/delayed, thereby effecting girder erection and deck
construction. These impacts can include idled equipment and manpower and increased storage
and transportation costs for soon to be fabricated items such as girders and bearings. The idled
condition may force the contractor to take measures not originally planned for to maintain or
recover his construction schedule. The vernacular for these impacts are disruption of works, loss
of productivity, accelerative measures, extended overhead, loss of profit and loss of interest on
earnings.
TOTAL IMPACT for Trestle Cleanup: Direct + Indirect S2,500,000 to $4,000,000
The Department feels that this method is unacceptable; at even the most conservative estimate of
52,500,000 the extended delays and extravagant costs make this alternative non-feasible.
Therefore, the NCDOT proposes to contain the sediment using silt fence and hay bales as was
allowed on the west side. The material will then be removed by a lightweight Caterpillar 307
excavator and a low ground pressure tracked loader. These lightweight pieces of equipment will
be transported to the sediment containment area via wooden mats placed on the ground. The
wooden mats will be ten feet wide. The total length of matting will be 1,903.0 feet from bridge
bent 249 to the end bent (high ground) with an additional 20.0 feet of perpendicular matting per
bent to access the containment area. Cleanup methodology will consist of utilizing the
lightweight excavator to recover the material and place it in a small pile within the containment
area. The low ground pressure tracked loader will then transport the material across the mat road
to high ground to be disposed of. Total area involved in sediment containment and cleanup will
be 2.325 acres.
The amount of pressure exerted on the mat road is expected to be significantly less than was
exerted on the mat road during sediment clean up on the west side. This is due to the utilization
of a low ground pressure tracked loader as opposed to a standard front end loader. Therefore, it
is reasonable to conclude that there will be less settling associated with the use of matting. The
total area affected by matting will be 0.524 acres. The NCDOT is committed to a full
monitoring of the affected area to insure that the marsh recovers. Monitoring will be conducted
in accordance with attached monitoring plan. Additionally, the NCDOT has acquired a property
that is currently being developed as a mitigation site. The site is near Stumpy Point, NC and will
involve the restoration of a black needle rush (Juncus roemerianus) salt marsh community. The
NCDOT fully expects the affected matting area to recover. However, the development of the
Stumpy Point mitigation site is intended to serve as a "safety net" should monitoring of the
cleanup area reveal that the recovery is not successful.
3

Modification # 2: Authorize the extension 'of the currently permitted Tee road by 60.0 feet
If you recall the Tee road is a section of temporary work trestle perpendicular to the bridge
alignment which allows the contractor to get as close as possible to the bent for pile installation.
The current design for the Tee road is a 60.0-foot long section of Tee road extending
perpendicularly from the temporary work trestle to the bridge bents. The trestle was proposed
the minimum practical safe distance from the bridge with the -60.0 foot Tee road extending out to
the bridge to allow a crane to stretch from the Tee road to the bridge bent. However, after a test
pile program conducted at the beginning of project construction, it was found that the 60.0 foot
Tee road was not sufficient for all of the bent construction activities on the east side.
The test pile program revealed that longer, heavier piles would be needed on the east side than
were utilized on the west side. Pile lengths were changed from an average of 35 meters (115.0
feet) to an average of 42 (138.0 feet) meters in length. The distance that has to be stretched by
the crane, coupled with the heavier and larger load, produces a situation that may cause
equipment failures and compromise personal safety of workers. Therefore, the Department
requests that the authorization be granted to extend the Tee road an additional 60.0 feet. The
proposed extension will require four additional 24" pipe piles. Please note that these piles are
temporary at each location. They will be in place only as long as pile driving activities are
taking place at that bent. The Tee road will then be dismantled and moved to the next bent.
Please see the attached construction drawings for reference.
Modification 43: Authorize a temporarv floating dock
The contractor has requested permission to build a temporary floating dock at load-out trestle
bent number four. The temporary floating dock will be used to dock construction vessels as well
as on and off load construction equipment and workers. The dock will be approximately 6.096
meters x 6.096 meters (20.0 feet x 20.0 feet). This will require the installation of six 0.304-meter
(12.0-inch) steel cylinder piles. Please see the attached construction drawings for reference.
Modification 44: Authorize mooring piles and temporary trestle stabilization measures
The contractor has requested permission to construct four 0.919-meter (36.0-inch) steel mooring
piles at bent thirteen of the load-out trestle. The-mooring piles will be used for construction
barges. The barges will tie to the mooring piles while loading or unloading construction
equipment and supplies. This will result in an increased demand and stress on the temporary
trestle. Therefore, we are also requesting authorization to install H-beams for stabilization at
load-out trestle bents 6, 8, 10, 11, 12, and 13. Additionally, two 0.6096-meter (24.0-inch) steel
cylinder piles will be installed at load-out trestle bent number 10. Designs for the stabilization is
included in the construction drawings.
4
Modification #5: Authorize minimum use of jettingto loosen temporary trestle piles
The original plan for the utilization of this trestle called for the temporary support piles to be
vibrated out and for the trestle to be moved to the east side of the Croatan Sound. However,
recent attempts to remove the temporary piles by vibration have been unsuccessful.
The NCDOT has determined that the piles can be loosened and removed with a minimal use of
"jetting A very minor amount of material may surface from the pile loosening. Any material
produced by this operation will be raked into the void left by the removed piling. If there is not
enough material to fill the void, the hole will be filled to the elevation of the adjacent ground
with clean sand. Per our telephone conversation of September 14, 1999, the NCDOT will utilize
the above described technique to remove one piling. After removal, the USACE and the
NCDCM will be consulted on site to determine if this method of piling removal is satisfactory.
Your consideration is requested in processing this proposal as a "minor" modification. An
expedited approval is essential to meeting critical project scheduling. Please call me if I can
provide any additional information.
Sincerely,
D. R. Conner, P. E.
Division Enginner
T. Linds ddick, Jr.
Division Environmental Officer-Division One
CC: Mr. R. E. Capehart, P. E.
Mr. R. W. Midgett, P. E.
Mr. Frank Jennings, NCDCM
Mr. David Cox, NCWRC
Ms. Sarah Winslow, NCDMF
Mr. John Hennessy, NCDWQ
Mr. Ron Sechler, NNE
Mr. Doug Huggett, NCDCM
Mr. Randy K. Wise, P. E.
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Monitoring Plan for the recovery of the disturbed marsh area adjacent to the new
Croatan Sound Bridge
The plan consists of monitoring the disturbed site to determine the success of vegetative recovery
occurring within it. The existing undisturbed marsh, dominated by black needle rush (Juncus
roemerianus), adjacent to the disturbed site will be evaluated in January, 2000, and will be used
as a reference marsh to determine the degree of recover-. Three plots measuring 1 meter by 1
meter will be selected randomly and the percent aerial vegetative coverage will be evaluated and
used as a baseline reference.
The disturbed area will be allowed to recover naturally from existing plant material and seed
source present. Vegetative monitoring will be conducted annually beginning in January of 2000.
The monitoring will consist of randomly selecting 12 plots in the disturbed area, measuring 1
meter by 1 meter, and comparing the level of regeneration to the reference marsh. The area will
be evaluated after one full growing season in September of 2000 to determine if replanting with
black needle rush will be necessary. If replanting is deemed necessary, NCDOT will prepare a
planting plan and submit it to the USACE and the NCDCM for approval. All efforts will be
made to utilize a local seed source if plantings are required. If there are any areas where
compaction has prevented natural regeneration from occurring, hand labor will be used to scarify
the area to remediate the compaction. Areas that require scarification will be planted with black
needle rush and monitored accordingly.
As required, there will be a zero tolerance for phragmites (Phragmites communis). If the
presence of this species is detected, measures will be taken immediately to eradicate this species
from the site.
Monitoring reports will be submitted by December 31ST of each year for a period of five years.
The disturbed area will be considered recovered when aerial vegetative coverage has been
determined to meet or exceed 90% of the coverage found in the reference marsh. If after a
period of three years, it is determined that recovery efforts are not succeeding, the North
Carolina Department of Transportation will consult with the U. S. Army Corps of Engineers and
the North Carolina Division of Coastal Management to discuss necessary remedial action.
[Fwd: R-2551 Bridge over Croatan Sound]
Subject: [Fwd: R-2551 Bridge over Croatan Sound]
Date: Tue, 11 Apr 2000 15:18:36 -0400
From: Cathy Brittingham <[e-mail]>
Organization: NC DENR DCM
To: John Hennessy <[e-mail]>, [e-mail]
John and David - FYI, attached is an e-mail I sent to Lindsey Riddick
this morning requesting revised permit drawings for the DOT modification
request to R-2551.
Lindsey questioned whether revised drawings are really necessary since
the only change to the original modification request is the location of
the mat road, which will no longer extend through coastal marsh. After
talking with Lindsey and John today, it was determined that revised
drawing(s) are required that show the jurisdictional areas, coastal
marsh vs. freshwater marsh. I requested that the revised drawing(s) be
drawn to scale. I also requested a vicinity map. Lindsey will have a
plat prepared that ties the location of jurisdictional areas to a
Station Number. Lindsey expects he can submit the revised permit
drawing(s) by the end of this week or early next week. John, I told
Lindsey that you would also need revised drawing(s).
David, as soon as DCM receives the revised drawing(s) from DOT, we would
like to take final action on the CAMA permit modification (issue?). Are
you in agreement with DOT's modification request as outlined in
Lindsey's April 6th e-mail and attached letter? Do you have any
recommended conditions for the CAMA permit modification?
Thanks,
Cathy
Subject: Re: R-2551 Bridge over Croatan Sound
Date: Tue, 11 Apr 2000 12:06:49 -0400
From: Cathy Brittingham <[e-mail]>
Organization: NC DENR DCM
To: "T. Lindsey Riddick" <[e-mail]>
CC: Frank Jennings <[e-mail]>, [e-mail]
Lindsey,
The only permit drawings DCM has received for DOT's modification request to CAMA
Permit No. 7-98 were dated November 12th. In order for DCM to process the most
recent modification request to CAMA Permit No. 7-98 per DOT letter dated April
6th, we will need a full set of revised permit drawings reflecting DOT's current
request. As soon as the revised permit drawings are received, DCM will
circulate the modification request to relevant state reviewing agencies for
comment.
Also, FYI, I called Mike Bell yesterday and left a message on his voicemail
letting him know that DCM will not be preparing a separate consistency
determination for this DOT modification request. DCM's final action on DOT's
request to modify CAMA Permit No. 7-98 will serve as DCM's consistency
determination.
Thanks,
Cathy
1 of 2 04/11/2000 3:58 P1V
[Fwd: R-2551 Bridge over Croatan Sound]
"T. Lindsey Riddick" wrote:
> Regulatory and Commenting Agency Representatives,
> As most of you know the NCDOT has requested that the existing
> authorizations for this project be modified to allow the
> construction method known as jetting, along with various other
> minor items. The main issue has been the cleanup method employed
> to remove the spoil material after jetting. The USACE has
> requested that the NCDOT submit a cleanup plan. The attached
> document serves as that cleanup plan. Mr. Mike Bell of the USACE
> will be out of the office for three weeks beginning on April 11,
> 2000. if at all possible, please provide any verbal or written
> comments to him by 4110100. His telephone number is (252)
> 975-1616 x26. If you are unable to comment before April 10, 2000,
> plaese send your comments to Ms. Jean Manuel in the USACE Raleigh
> field office. Her telephone number is [phone]. Her
> mailing address is: USACE Raleigh Feild office, 6508 Falls of
> the Neuse Road, Raleigh, NC 27615. I will be available to answer
> any questions you may have. My office telephone number is (252)
> 482-7977. You may also reach me on my mobile phone 0 (252)
> 339-0112. The NCDOT sincerely appreciates all of your efforts.
> Any assistance you may be able to provide in resolving this issue
> quickly will be greatly appreciated.
> T. Lindsey Riddick, Jr.
> Division One Environmental Officer
> [phone]
> FAX: [phone]
> ------------------------------------------------------------------------
> Name: cleanupproposalsmod.doc
> cleanupproposalsmod.doc Type: WINWORD File (application/msword)
> Encoding: base64
> Download Status: Not downloaded with message
2 of 2 04/11/2000 3:58 PM
u Zu00
V&TLANDS GROUP
?flJATER QUA,,,e,_, L?CTIOH ..
r'
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR. DAVID McCOY
GOVENOR SECRETARY
April 6, 2000
Michael F. Bell, Regulatory Project Manager
U.S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. BOX 1000
Washington, North Carolina 27889
Dear Mr. Bell:
SUBJECT: Proposed Minor Modification to Department of the Army
Permit No. 199502334: Improvements to US 64-264, Including
the construction of a new Croatan Sound bridge, from west of
Manns Harbor to NC 345, south of Manteo, in Dare County;
Federal Aid Project No. NHF-64 (6); State Project No. 8.T051401;
TIP No. R-2551.
As you are aware, the NCDOT has requested that Department of the Army
Permit No. 199502334 be modified to (1) authorize pile jetting and cleanup;
and (2) authorize an extension of the currently permitted Tee road by 60.0
feet; and 3) authorize a temporary floating dock; and 4) authorize mooring
piles and stabilization measures for the temporary load-out trestle; and 5)
authorize a minimal use of jetting to loosen temporary trestle piles for
removal on both the west and east sides.
Modification request 1 is discussed below. Modification requests 2-4 have
not changed since the original request. Due to the successful removal of
piles without utilizing jetting, modification request 5 (authorize a minimal
use of jetting to loosen temporary trestle piles for removal on both the
west and east sides) is no longer necessary and is hereby rescinded.
Please reference the March 14, 2000 letter from the NCDOT requesting
authorization to jet piles conditioned upon the NCDOT providing the USACE
with an approved cleanup plan before jetting operations were initiated.
This letter is a response to the subsequent request from the USACE that a
plan be provided for cleanup before any authorization is granted. Also
please reference the January 28, 2000 letter from the NCDOT detailing cost
P. O. Box 850 Edenton, NC 27932 [phone] FAX: [phone]
estimates for jetting spoil cleanup as well as the original modification
request of November 12, 1999.
The NCDOT proposes to cleanup all spoil material associated with jetting
operations in jurisdictional areas. As noted in the referenced
correspondence, jetting is proposed at 19 bent locations. Of these 19 bents,
9 bents occur within freshwater wetlands and 10 bents occur within coastal
wetlands.
Currently, the NCDOT has two options that are considered feasible: 1)
(Preferred) Remove all material within the coastal marsh with a crane fitted
with a clamshell bucket from the existing work trestle and utilize mats and
lightweight tracked equipment to remove material from the freshwater
wetlands; 2) Extend the temporary trestle all the way to high ground and
remove all material from the trestle via the crane and clamshell bucket.
OPTION ONE (Preferred): Utilize a combination of cleanup from mats
and trestle
The NCDOT proposes to utilize the existing temporary construction trestle as
access to remove all material deposited within coastal marsh. A crane with a
smooth clam bucket will be operated from the trestle. The material will be
picked up with the crane and offloaded into bins on the trestle. The
material will then be transported to,high ground for disposal. At no time
will any tracked or wheeled equipment be operated in the coastal marsh. As
described in the referenced January 28, 2000 correspondence, the cost for
utilizing the existing work trestle to cleanup the affected area around 10
bents will be $1,782,721.
All material deposited within the freshwater wetlands will be removed
utilizing a mat road as described in the referenced correspondence from
November 12, 1999. As described in the referenced January 28, 2000
correspondence, the cost for utilizing mats to cleanup, monitor, and
mitigate (if necessary) is $206,173. Please note that the NCDOT will, under
no circumstances, use more than one layer of mats. If the soil below the
mats subsides to the point that additional mats need to be stacked on the
initial mat road, the NCDOT will abort the matting cleanup operation. If it is
determined that one layer of mats will not support the removal operation,
the existing work trestle will be extended and all cleanup will be conducted
via the trestle/crane system.
Total cost for combination option is $1,988,894
OPTION TWO: Remove material from both the coastal marsh and
freshwater wetlands from the existing work trestle using a crane and
clamshell bucket.
As described in the referenced January 28, 2000 correspondence, the total
cost for extending the existing temporary work trestle and cleaning up the
entire affected area from the trestle with a crane and clamshell bucket is
$3,382,773.
Cost savings by using the combination option Vs. trestle only= $1,393,878.
The NCDOT hereby requests that the existing permit be modified to
authorize (1) authorize pile jetting and cleanup utilizing a combination of
mats and the temporary work trestle; and (2) authorize an extension of the
currently permitted Tee road by 60.0 feet; and 3) authorize a temporary
floating dock; and 4) authorize mooring piles and stabilization measures for
the temporary load-out. There will be no use of matting or tracked or
wheeled vehicles within any portions of coastal wetlands. Furthermore,
should it be discovered that the ground will not adequately support
matting, all operations in freshwater wetlands using mats will be suspended
and all material will be removed from the trestle.
Thank you for your time and consideration. The Department respectfully
requests that processing of this modification request proceed as soon as
possible. By copy of this letter, the Department also requests that the
Division of Water Quality and the Division of Coastal Management also
modify the 401 Water Quality Certification
and the CAMA Major Development Permit respectively. If you have any
further questions or would like additional information, please don't hesitate
to call.
Sincerely,
D. R. Conner, P. E.
Division Engineer
T. Lind ddick, Jr.
Division Environmental Officer
CC: Mr. John Hennessy, DWQ
Mr. David Cox, WRC
Mr. Tom McCartney, FWS
Mr. Ron Sechler, NMFS
Ms. Sara Winslow, DMF
Mr. Bill Gilmore, P.E., DOT
Mr. Frank Jennings, NCDCM
Mr. R. W. Midgett, P. E.
Mr. R. E. Capehart, P. E.
Mr. Steve DeWitt, P. E.
Mr. Ted Bisterfield, EPA
Ms. Cathy Brittingham, NCDCM
DAMy Documents\R-2551\cleanupproposalsmod.doc
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0 2000
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WETLANDS GROUP
WATER QUALITY SECTION
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR.
GOVENOR
April 6, 2000
Michael F. Bell, Regulatory Project Manager
U.S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. BOX 1000
Washington, North Carolina 27889
Dear Mr. Bell:
DAVID McCOY
SECRETARY
SUBJECT: Proposed Minor Modification to Department of the Army
Permit No. 199502334: Improvements to US 64-264, including
the construction of a new Croatan Sound bridge, from west of
Manns Harbor to NC 345, south of Manteo, in Dare County;
Federal Aid Project No. NHF-64 (6); State Project No. 8.T051401;
TIP No. R-2551.
As you are aware, the NCDOT has requested that Department of the Army
Permit No. 199502334 be modified to (1) authorize pile jetting and cleanup;
and (2) authorize an extension of the currently permitted Tee road by 60.0
feet; and 3) authorize a temporary floating dock; and 4) authorize mooring
piles and stabilization measures for the temporary load-out trestle; and 5)
authorize a minimal use of jetting to loosen temporary trestle piles for
removal on both the west and east sides.
Modification request 1 is discussed below. Modification requests 2-4 have
not changed since the original request. Due to the successful removal of
piles without utilizing jetting, modification request 5 (authorize a minimal
use of jetting to loosen temporary trestle piles for removal on both the
west and east sides) is no longer necessary and is hereby rescinded.
Please reference the March 14, 2000 letter from the NCDOT requesting
authorization to jet piles conditioned upon the NCDOT providing the USAGE
with an approved cleanup plan before jetting operations were initiated.
This letter is a response to the subsequent request from the USAGE that a
plan be provided for cleanup before any authorization is granted. Also
please reference the January 28, 2000 letter from the NCDOT detailing cost
P. O. Box 850 Edenton, NC 27932 [phone] FAX: [phone]

estimates for jetting spoil cleanup as well as the original modification
request of November 12, 1999.
The NCDOT proposes to cleanup all spoil material associated with jetting
operations in jurisdictional areas. As noted in the referenced
correspondence, jetting is proposed at 19 bent locations. Of these 19 bents,
9 bents occur within freshwater wetlands and 10 bents occur within coastal
wetlands.
Currently, the NCDOT has two options that are considered feasible: 1)
(Preferred) Remove all material within the coastal marsh with a crane fitted
with a clamshell bucket from the existing work trestle and utilize mats and
lightweight tracked equipment to remove material from the freshwater
wetlands; 2) Extend the temporary trestle all the way to high ground and
remove all material from the trestle via the crane and clamshell bucket.
OPTION ONE (Preferred): Utilize a combination of cleanup from mats
and trestle
The NCDOT proposes to utilize the existing temporary construction trestle as
access to remove all material deposited within coastal marsh. A crane with a
smooth clam bucket will be operated from the trestle. The material will be
picked up with the crane and offloaded into bins on the trestle. The
material will then be transported to high ground for disposal. At no time
will any tracked or wheeled equipment be operated in the coastal marsh. As
described in the referenced January 28, 2000 correspondence, the cost for
utilizing the existing work trestle to cleanup the affected area around 10
bents will be $1,782,721.
All material deposited within the freshwater wetlands will be removed
utilizing a mat road as described in the referenced correspondence from
November 12, 1999. As described in the referenced January 28, 2000
correspondence, the cost for utilizing mats to cleanup, monitor, and
mitigate (if necessary) is $206,173. Please note that the NCDOT will, under
no circumstances, use more than one layer of mats. If the soil below the
mats subsides to the point that additional mats need to be stacked on the
initial mat road, the NCDOT will abort the matting cleanup operation. if it is
determined that one layer of mats will not support the removal operation,
the existing work trestle will be extended and all cleanup will be conducted
via the trestle/crane system.
Total cost for combination option is $1,988,894
OPTION TWO: Remove material from both the coastal marsh and
freshwater wetlands from the existing work trestle using a crane and
clamshell bucket.
As described in the referenced January 28, 2000 correspondence, the total
cost for extending the existing temporary work trestle and cleaning up the
entire affected area from the trestle with a crane and clamshell bucket is
$3,382,773.
Cost savings by using the combination option Vs. trestle only= $1,393,878.
The NCDOT hereby requests that the existing permit be modified to
authorize (1) authorize pile jetting and cleanup utilizing a combination of
mats and the temporary work trestle; and (2) authorize an extension of the
currently permitted Tee road by 60.0 feet; and 3) authorize a temporary
floating dock; and 4) authorize mooring piles and stabilization measures for
the temporary load-out. There will be no use of matting or tracked or
wheeled vehicles within any portions of coastal wetlands. Furthermore,
should it be discovered that the ground will not adequately support
matting, all operations in freshwater wetlands using mats will be suspended
and all material will be removed from the trestle.
Thank you for your time and consideration. The Department respectfully
requests that processing of this modification request proceed as soon as
possible. By copy of this letter, the Department also requests that the
Division of Water Quality and the Division of Coastal Management also
modify the 401 Water Quality Certification
and the CAMA Major Development Permit respectively. If you have any
further questions or would like additional information, please don't hesitate
to call.
Sincerely,
D. R. Conner, P. E.
Division Engineer
T. Lin ddick, Jr.
Division Environmental Officer
CC: Mr. John Hennessy, DWQ
Mr. David Cox, WRC
Mr. Tom McCartney, FWS
Mr. Ron Sechler, NMFS
Ms. Sara Winslow, DMF
Mr. Bill Gilmore, P.E., DOT
Mr. Frank Jennings, NCDCM
Mr. R. W. Midgett, P. E.
Mr. R. E. Capehart, P. E.
Mr. Steve DeWitt, P. E.
Mr. Ted Bisterfield, EPA
Ms. Cathy Brittingham, NCDCM
DAMy Documents\R-255 1\cleanupproposalsmod.doc
_ fro
y d y'q
f
0 2000 -
NE WETLANDS GROU
ATER UALITY SECTION
STATE OF NORTH CAROLLVA
DEPARTMENT OF TRANSPORTATION
JA.S B. HUNT JR.
GOVENOR
April 6, 2000
Michael F. Bell, Regulatory Project Manager
U.S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. Box 1000
Washington, North Carolina 27889
Dear Mr. Bell:
DAVID McCOY
SECRETARY
SUBJECT: Proposed Minor Modification to Department of the Army
Permit No. 199502334: Improvements to US 64-264, Including
the construction of a new Croatan Sound bridge, from west of
Manns Harbor to NC 345, south of Manteo, in Dare County;
Federal Aid Project No. NHF-64 (6); State Project No. 8.T051401;
TIP No. R-2551.
As you are aware, the NCDOT has requested that Department of the Army
Permit No. 199502334 be modified to (1) authorize pile jetting and cleanup;
and (2) authorize an extension of the currently permitted Tee road by 60.0
feet; and 3) authorize a temporary floating dock; and 4) authorize mooring
piles and stabilization measures for the temporary load-out trestle; and 5)
authorize a minimal use of jetting to loosen temporary trestle piles for
removal on both the west and east sides.
Modification request 1 is discussed below. Modification requests 2-4 have
not changed since the original request. Due to the successful removal of
piles without utilizing jetting, modification request 5 (authorize a minimal
use of jetting to loosen temporary trestle piles for removal on both the
west and east sides) is no longer necessary and is hereby rescinded.
Please reference the March 14, 2000 letter from the NCDOT requesting
authorization to jet piles conditioned upon the NCDOT providing the USACE
with an approved cleanup plan before jetting operations were initiated.
This letter is a response to the subsequent request from the USACE that a
plan be provided for cleanup before any authorization is granted. Also
please reference the January 28, 2000 letter from the NCDOT detailing cost
P. O. Box 850 Edenton, NC 27932 (252) 482-797 FAX: (25=) 482-8722
estimates for jetting spoil cleanup as well as the original modification
request of November 12, 1999.
The NCDOT proposes to cleanup all spoil material associated with jetting
operations in jurisdictional areas. As noted in the referenced
correspondence, jetting is proposed at 19 bent locations. Of these 19 bents,
9 bents occur within freshwater wetlands and 10 bents occur within coastal
wetlands.
Currently, the NCDOT has two options that are considered feasible: 1)
(Preferred) Remove all material within the coastal marsh with a crane fitted
with a clamshell bucket from the existing work trestle and utilize mats and
lightweight tracked equipment to remove material from the freshwater
wetlands; 2) Extend the temporary trestle all the way to high ground and
remove all material from the trestle via the crane and clamshell bucket.
OPTION ONE (Preferred): Utilize a combination of cleanup from mats
and trestle
The NCDOT proposes to utilize the existing temporary construction trestle as
access to remove all material deposited within coastal marsh. A crane with a
smooth clam bucket will be operated from the trestle. The material will be
picked up with the crane and offloaded into bins on the trestle. The
material will then be transported to high ground for disposal. At no time
will any tracked or wheeled equipment be operated in the coastal marsh. As
described in the referenced January 28, 2000 correspondence, the cost for
utilizing the existing work trestle to cleanup the affected area around 10
bents will be $1,782,721.
All material deposited within the freshwater wetlands will be removed
utilizing a mat road as described in the referenced correspondence from
November 12, 1999. As described in the referenced January 28, 2000
correspondence, the cost for utilizing mats to cleanup, monitor, and
mitigate (if necessary) is $206,173. Please note that the NCDOT will, under
no circumstances, use more than one layer of mats. If the soil below the
mats subsides to the point that additional mats need to be stacked on the
initial mat road, the NCDOT will abort the matting cleanup operation. If it is
determined that one layer of mats will not support the removal operation,
the existing work trestle will be extended and all cleanup will be conducted
via the trestle/crane system.
Total cost for combination option is $1,988,894
OPTION TWO: Remove material from both the coastal marsh and
freshwater wetlands from the existing work trestle using a crane and
clamshell bucket.
As described in the referenced January 28, 2000 correspondence, the total
cost for extending the existing temporary work trestle and cleaning up the

entire affected area from the trestle with a crane and clamshell bucket is
$3,382,773.
Cost savings by using the combination option Vs. trestle only=$1,393,878.
The NCDOT hereby requests that the existing permit be modified to
authorize (1) authorize pile jetting and cleanup utilizing a combination of
mats and the temporary work trestle; and (2) authorize an extension of the
currently permitted Tee road by 60.0 feet; and 3) authorize a temporary
floating dock; and 4) authorize mooring piles and stabilization measures for
the temporary load-out. There will be no use of matting or tracked or
wheeled vehicles within any portions of coastal wetlands. Furthermore,
should it be discovered that the ground will not adequately-support
matting, all operations in freshwater wetlands using mats will be suspended
and all material will be removed from the trestle.
Thank you for your time and consideration. The Department respectfully
requests that processing of this modification request proceed as soon as
possible. By copy of this letter, the Department also requests that the
Division of Water Quality and the Division of Coastal Management also
modify the 401 Water Quality Certification
and the CAMA Major Development Permit respectively. If you have any
further questions or would like additional information, please don't hesitate
to call.
Sincerely,
D. R. Conner, P. E.
Division Engineer
l
T. Lind iddick, Jr.
Division Environmental Officer
CC: Mr. John Hennessy, DWQ
Mr. David Cox, WRC
Mr. Tom McCartney, FWS
Mr. Ron Sechler, NMFS
Ms. Sara Winslow, DMF
Mr. Bill Gilmore, P.E., DOT
Mr. Frank Jennings, NCDCM
Mr. R. W. Midgett, P. E.
Mr. R. E. Capehart, P. E.
Mr. Steve DeWitt, P. E.
Mr. Ted Bisterfield, EPA
Ms. Cathy Brittingham, NCDCM
DAMy Documents\R-2551 \cleanupproposalsmod.doc
ei,. STAipo
APR I l_ ?000
is
1 -
VIATER WETLANDS GPOUa- ?'•?a : ?
UALiT'? S?CT!G?!
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR.
GOVENOR
April 6, 2000
Michael F. Bell, Regulatory Project Manager
U.S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. BOX 1000
Washington, North Carolina 27889
Dear Mr. Bell:
DAVID McCOY
SECRETARY
SUBJECT: Proposed Minor Modification to Department of the Army
Permit No. 199502334: Improvements to US 64-264, Including
the construction of a new Croatan sound bridge, from west of
Manns Harbor to NC 345, south of Manteo, in Dare County;
Federal Aid Project No. NHF-64 (6); State Project No. 83051401;
TIP No. R-2551.
As you are aware, the NCDOT has requested that Department of the Army
Permit No. 199502334 be modified to (1) authorize pile jetting and cleanup;
and (2) authorize an extension of the currently permitted Tee road by 60.0
feet; and 3) authorize a temporary floating dock; and 4) authorize mooring
piles and stabilization measures for the temporary load-out trestle; and 5)
authorize a minimal use of jetting to loosen temporary trestle piles for
removal on both the west and east sides.
Modification request 1 is discussed below. Modification requests 2-4 have
not changed since the original request. Due to the successful removal of
piles without utilizing jetting, modification request 5 (authorize a minimal
use of jetting to loosen temporary trestle piles for removal on both the
west and east sides) is no longer necessary and is hereby rescinded.
Please reference the March 14, 2000 letter from the NCDOT requesting
authorization to jet piles conditioned upon the NCDOT providing the USACE
with an approved cleanup plan before jetting operations were initiated.
This letter is a response to the subsequent request from the USACE that a
plan be provided for cleanup before any authorization is granted. Also
please reference the January 28, 2000 letter from the NCDOT detailing cost
P. O. Box 850 Edenton, NC 27932 [phone] FAX: [phone]
y
estimates for jetting spoil cleanup as well as the original modification
request of November 12, 1999.
The NCDOT proposes to cleanup all spoil material associated with jetting
operations in jurisdictional areas. As noted in the referenced
correspondence, jetting is proposed at 19 bent locations. Of these 19 bents,
9 bents occur within freshwater wetlands and 10 bents occur within coastal
wetlands.
Currently, the NCDOT has two options that are considered feasible: 1)
(Preferred) Remove all material within the coastal marsh with a crane fitted
with a clamshell bucket from the existing work trestle and utilize mats and
lightweight tracked equipment to remove material from the freshwater
wetlands; 2) Extend the temporary trestle all the way to high ground and
remove all material from the trestle via the crane and clamshell bucket.
OPTION ONE (Preferred): Utilize a combination of cleanup from mats
and trestle
The NCDOT proposes to utilize the existing temporary construction trestle as
access to remove all material deposited within coastal marsh. A crane with a
smooth clam bucket will be operated from the trestle. The material will be
picked up with the crane and offloaded into bins on the trestle. The
material will then be transported to high ground for disposal. At no time
will any tracked or wheeled equipment be operated in the coastal marsh. As
described in the referenced January 28, 2000 correspondence, the cost for
utilizing the existing work trestle to cleanup the affected area around 10
bents will be $1,782,721.
All material deposited within the freshwater wetlands will be removed
utilizing a mat road as described in the referenced correspondence from
November 12, 1999. As described in the referenced January 28, 2000
correspondence, the cost for utilizing mats to cleanup, monitor, and
mitigate (if necessary) is $206,173. Please note that the NCDOT will, under
no circumstances, use more than one layer of mats. If the soil below the
mats subsides to the point that additional mats need to be stacked on the
initial mat road, the NCDOT will abort the matting cleanup operation. If it is
determined that one layer of mats will not support the removal operation,
the existing. work trestle will be extended and all cleanup will be conducted
via the trestle/crane system.
Total cost for combination option is $1,988,894
OPTION TWO: Remove material from both the coastal marsh and
freshwater wetlands from the existing work trestle using a crane and
clamshell bucket.
As described in the referenced January 28, 2000 correspondence, the total
cost for extending the existing temporary work trestle and cleaning up the
entire affected area from the trestle with a crane and clamshell bucket is
$3,382,773.
Cost savings by using the combination option Vs. trestle only= $1,393,878.
The NCDOT hereby requests that the existing permit be modified to
authorize (1) authorize pile jetting and cleanup utilizing a combination of
mats and the temporary work trestle; and (2) authorize an extension of the
currently permitted Tee road by 60.0 feet; and 3) authorize a temporary
floating dock; and 4) authorize mooring piles and stabilization measures for
the temporary load-out. There will be no use of matting or tracked or
wheeled vehicles within any portions of coastal wetlands. Furthermore,
should it be discovered that the ground will not adequately support
matting, all operations in freshwater wetlands using mats will be suspended
and all material will be removed from the trestle.
Thank you for your time and consideration. The Department respectfully
requests that processing of this modification request proceed as soon as
possible. By copy of this letter, the Department also requests that the
Division of Water Quality and the Division of Coastal Management also
modify the 401 Water Quality Certification
and the CAMA Major Development Permit respectively. If you have any
further questions or would like additional information, please don't hesitate
to call.
Sincerely,
D. R. Conner, P. E.
Division Engineer
T. Lind ddick, Jr.
Division Environmental Officer
CC: Mr. John Hennessy, DWQ
Mr.. David Cox, WRC
Mr. Tom McCartney, FWS
Mr. Ron Sechler, NMFS
Ms. Sara Winslow, DMF
Mr. Bill Gilmore, P.E., DOT
Mr. Frank Jennings, NCDCM
Mr. R. W. Midgett, P. E.
Mr. R. E. Capehart, P. E.
Mr. Steve DeWitt, P. E.
Mr. Ted Bisterfield, EPA
Ms. Cathy Brittingham, NCDCM
D:\.My Documents\R-255:`cleanupproposalsmod.doc
- .

0 12 010 0
i
VW?qVET LASduS Cup
??lATER QUALITY'SECF?'v'i?
FaS?333yyy??.???.YYY «• ?,
t7 d ?a?
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR. DAVID McCOY
GOVENOR SECRETARY
April 6, 2000
Michael F. Bell, Regulatory Project Manager
U.S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. BOX 1000
Washington, North Carolina 27889
Dear Mr. Bell:
SUBJECT: Proposed Minor Modification to Department of the Army
Permit No. 199502334: Improvements to US 64-264, Including
the construction of a new Croatan Sound bridge, from west of
Manns Harbor to NC 345, south of Manteo, in Dare County;
Federal Aid Project No. NHF-64 (6); State Project No. 8.T051401;
TIP No. R-2551.
As you are aware, the NCDOT has requested that Department of the Army
Permit No. 199502334 be modified to (1) authorize pile jetting and cleanup;
and (2) authorize an extension of the currently permitted Tee road by 60.0
feet; and 3) authorize a temporary floating dock; and 4) authorize mooring
piles and stabilization measures for the temporary load-out trestle; and 5)
authorize a minimal use of jetting to loosen temporary trestle piles for
removal on both the west and east sides.
Modification request 1 is discussed below. Modification requests 2-4 have
not changed since the original request. Due to the successful removal of
piles without utilizing jetting, modification request 5 (authorize a minimal
use of jetting to loosen temporary trestle piles for removal on both the
west and east sides) is no longer necessary and is hereby rescinded.
Please reference the March 14, 2000 letter from the NCDOT requesting
authorization to jet piles conditioned upon the NCDOT providing the USACE
with an approved cleanup plan before jetting operations were initiated.
This letter is a response to the subsequent request from the USACE that a
plan be provided for cleanup before any authorization is granted. Also
please reference the January 28, 2000 letter from the NCDOT detailing cost
P. O. Box 850 Edenton, NC 27932 [phone] FAX: [phone]
estimates for jetting spoil cleanup as well as the original modification
request of November 12, 1999.
The NCDOT proposes to cleanup all spoil material associated with jetting
operations in jurisdictional areas. As noted in the referenced
correspondence, jetting is proposed at 19 bent locations. Of these 19 bents,
9 bents occur within freshwater wetlands and 10 bents occur within coastal
wetlands.
Currently, the NCDOT has two options that are considered feasible: 1)
(Preferred) Remove all material within the coastal marsh with a crane fitted
with a clamshell bucket from the existing work trestle and utilize mats and
lightweight tracked equipment to remove material from the freshwater
wetlands; 2) Extend the temporary trestle all the way to high ground and
remove all material from the trestle via the crane and clamshell bucket.
OPTION ONE (Preferred): Utilize a combination of cleanup from mats
and trestle
The NCDOT proposes to utilize the existing temporary construction trestle as
access to remove all material deposited within coastal marsh. A crane with a
smooth clam bucket will be operated from the trestle. The material will be
picked up with the crane and offloaded into bins on the trestle. The
material will then be transported to high ground for disposal. At no time
will any tracked or wheeled equipment be operated in the coastal marsh. As
described in the referenced January 28, 2000 correspondence, the cost for
utilizing the existing work trestle to cleanup the affected area around 10
bents will be $1,782,721.
All material deposited within the freshwater wetlands will be removed
utilizing a mat road as described in the referenced correspondence from
November 12,1999. As described in the referenced January 28, 2000
correspondence, the cost for utilizing mats to cleanup, monitor, and
mitigate (if necessary) is $206,173. Please note that the NCDOT will, under
no circumstances, use more than one layer of mats. If the soil below the
mats subsides to the point that additional mats need to be stacked on the
initial mat road, the NCDOT will abort the matting cleanup operation. If it is
determined that one layer of mats will not support the removal operation,
the existing work trestle will be extended and all cleanup will be conducted
via the trestle/crane system.
Total cost for combination option is $1,988,894
OPTION TWO: Remove material from both the coastal marsh and
freshwater wetlands from the existing work trestle using a crane and
clamshell bucket.
As described in the referenced January 28, 2000 correspondence, the total
cost for extending the existing temporary work trestle and cleaning up the
entire affected area from the trestle with a crane and clamshell bucket is
$3,382,773.
Cost savings by using the combination option Vs. trestle only= $1,393,878.
The NCDOT hereby requests that the existing permit be modified to
authorize (1) authorize pile jetting and cleanup utilizing a combination of
mats and the temporary work trestle; and (2) authorize an extension of the
currently permitted Tee road by 60.0 feet; and 3) authorize a temporary
floating dock; and 4) authorize mooring piles and stabilization measures for
the temporary load-out. There will be no use of matting or tracked or
wheeled vehicles within any portions of coastal wetlands. Furthermore,
should it be discovered that the ground will not adequately support
matting, all operations in freshwater wetlands using mats will be suspended
and all material will be removed from the trestle.
Thank you for your time and consideration. The Department respectfully
requests that processing of this modification request proceed as soon as
possible. By copy of this letter, the Department also requests that the
Division of Water Quality and the Division of Coastal Management also
modify the 401 Water Quality Certification
and the CAMA Major Development Permit respectively. If you have any
further questions or would like additional information, please don't hesitate
to call.
Sincerely,
D. R. Conner, P. E.
Division Engineer
T. Lind ddick, Jr.
Division Environmental Officer
CC: Mr. John Hennessy, DWQ
Mr. David Cox, WRC
Mr. Tom McCartney, FWS
Mr. Ron Sechler, NMFS
Ms. Sara Winslow, DMF
Mr. Bill Gilmore, P.E., DOT
Mr. Frank Jennings, NCDCM
Mr. R. W. Midgett, P. E.
Mr. R. E. Capehart, P. E.
Mr. Steve DeWitt, P. E.
Mr. Ted Bisterfield, EPA
Ms. Cathy Brittingham, NCDCM
D:\My Documents\R-2551\ cleanupproposalsmod.doc

App t1 rrm
C_.
W ?i?idJJ
Np7Et0i.in
MQNFo?
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HLN°T JR DAVID McCOY
GOVENOR SECRETARY
April 6, 2000
Michael F. Bell, Regulatory Project Manager
U.S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. Box 1000
Washington, North Carolina 27889
Dear Mr. Bell:
SUBJECT: Proposed Minor Modification to Department of the Army
Permit No. 199502334: Improvements.to US 64-264, Including
the construction of a new Croatan Sound bridge, from west of
Manns Harbor to NC 345, south of Manteo, in Dare County;
Federal Aid Project No. NHF-64 (6); State Project No. 8.T051401;
TIP No. R-2551.
As you are aware, the NCDOT has requested that Department of the Army
Permit No. 199502334 be modified to (1) authorize pile jetting and cleanup;
and (2) authorize an extension of the currently permitted Tee road by 60.0
feet; and 3) authorize a temporary floating dock; and 4) authorize mooring
piles and stabilization measures for the temporary load-out trestle; and 5)
authorize a minimal use of jetting to loosen temporary trestle piles for
removal on both the west and east sides.
Modification request 1 is discussed below. Modification requests 2-4 have
not changed since the original request. Due to the successful removal of
piles without utilizing jetting, modification request 5 (authorize a minimal
use of jetting to loosen temporary trestle piles for removal on both the
west and east sides) is no longer necessary and is hereby rescinded.
Please reference the March 14, 2000 letter from the NCDOT requesting
authorization to jet piles conditioned upon the NCDOT providing the USACE
with an approved cleanup plan before jetting operations were initiated.
This letter is a response to the subsequent request from the USACE that a
plan be provided for cleanup before any authorization is granted. Also
please reference the January 28, 2000 letter from the NCDOT detailing cost
P. O. Box 850 Edenton, NC 27932 [phone] FAX: [phone]
estimates for jetting spoil cleanup as well as the original modification
request of November 12, 1999.
The NCDOT proposes to cleanup ail spoil material associated with jetting
operations in jurisdictional areas. As noted in the referenced
correspondence, jetting is proposed at 19 bent locations. Of these 19 bents,
9 bents occur within freshwater wetlands and 10 bents occur within coastal
wetlands.
Currently, the NCDOT has two options that are considered feasible: 1)
(Preferred) Remove all material within the coastal marsh with a crane fitted
with a clamshell bucket from the existing work trestle and utilize mats and
lightweight tracked equipment to remove material from the freshwater
wetlands; 2) Extend the temporary trestle all the way to high ground and
remove all material from the trestle via the crane and clamshell bucket.
OPTION ONE (Preferred): Utilize a combination of cleanup from mats
and trestle
The NCDOT proposes to utilize the existing temporary construction trestle as
access to remove all material deposited within coastal marsh. A crane with a
smooth clam bucket will be operated from the trestle. The material will be
picked up with the crane and offloaded into bins on the trestle. The
material will then be transported to high ground for disposal. At no time
will any tracked or wheeled equipment be operated in the coastal marsh. As
described in the referenced January 28, 2000 correspondence, the cost for
utilizing the existing work trestle to cleanup the affected area around 10
bents will be $1,782,721.
All material deposited within the freshwater wetlands will be removed
utilizing a mat road as described in the referenced correspondence from
November 12,1999. As described in the referenced January 28, 2000
correspondence, the cost for utilizing mats to cleanup, monitor, and
mitigate (if necessary) is $206,173. Please note that the NCDOT will, under
no circumstances, use more than one layer of mats. If the soil below the
mats subsides to the point that additional mats need to be stacked on the
initial mat road, the NCDOT will abort the matting cleanup operation. If it is
determined that one layer of mats will not support the removal operation,
the existing work trestle will be extended and all cleanup will be conducted
via the trestle/crane system.
Total cost for combination option is $1,988,894
OPTION TWO: Remove material from both the coastal marsh and
freshwater wetlands from the existing work trestle using a crane and
clamshell bucket.
As described in the referenced January 28, 2000 correspondence, the total
cost for extending the existing temporary work trestle and cleaning up the
entire affected area from the trestle with a crane and clamshell bucket is
$3,382,773.
Cost savings by using the combination option Vs. trestle only= $1,393,878.
The NCDOT hereby requests that the existing permit be modified to
authorize (1) authorize pile jetting and cleanup utilizing a combination of
mats and the temporary work trestle; and (2) authorize an extension of the
currently permitted Tee road by 60.0 feet; and 3) authorize a temporary
floating dock; and 4) authorize mooring piles and stabilization measures for
the temporary load-out. There will be no use of matting or tracked or
wheeled vehicles within any portions of coastal wetlands. Furthermore,
should it be discovered that the ground will not adequately support
matting, all operations in freshwater wetlands using mats will be suspended
and all material will be removed from the trestle.
Thank you for your time and consideration. The Department respectfully
requests that processing of this modification request proceed as soon as
possible. By copy of this letter, the Department also requests that the
Division of Water Quality and the Division of Coastal Management also
modify the 401 Water Quality Certification
and the CAMA Major Development Permit respectively. If you have any
further questions or would like additional information, please don't hesitate
to call..
Sincerely,
D. R. Conner, P. E.
Division Engineer
T. Lind iddick, Jr.
Division Environmental Officer
CC: Mr. John Hennessy, DWQ
Mr. David Cox, WRC
Mr. Tom McCartney, FWS
Mr. Ron Sechler, NMFS
Ms. Sara Winslow, DMF
Mr. Bill Gilmore, P.E., DOT
Mr. Frank Jennings, NCDCM
Mr. R. W. Midgett, P. E.
Mr. R. E. Capehart, P. E.
Mr. Steve DeWitt, P. E.
Mr. Ted Bisterfield, EPA
Ms. Cathy Brittingham, NCDCM
DAMy Documents\R-255 1\cleanupproposalsmod.doc
d wyauy
o 991 2 5
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR.
GOVENOR
November 12, 1999
Michael F. Bell, P.W.S., Regulatory Project Manager
U. S. Army Corps of Engineers
Washington Regulatory Field Office PAYMENT
P.O. Box looo RECEIVED
Washington, North Carolina 28779
Dear Mr. Bell:
DAVID McCOY
SECRETARY
SUBJECT: Proposed Minor Modification to Department of the Army Permit
No. 199502334: Improvements to US 64-264, Including the construction of a new Croatan Sound
bridge, from west of Manns Harbor to NC 345, south of Manteo, in Dare County; Federal Aid
Project No. NBF-64 (6); State Project No. 8.T051401; TIP No. R-2551.
The Department of Transportation requests that the existing DOA Permit be modified to (1)
authorize pile jetting and cleanup; and (2) authorize an extension of the currently permitted Tee
road by 60.0 feet; and 3) authorize a temporary floating dock; and 4) authorize mooring piles and
stabilization measures for the temporary load-out trestle; 5) authorize a minimal use of jetting to
loosen temporary trestle piles for removal on both the west and east sides.
Modification #1: Authorize pile jetting and cleanup,
The North Carolina Department of Transportation (NCDOT) is currently constructing a new
bridge over the Croatan Sound. As you are aware, the piles are being placed by the construction
method known as jetting. Jetting produces a mixture of sediment and water that is dispersed into
the marsh adjacent to the bridge bents. You will also recall that the NCDOT has attempted to
institute several methods of capturing the material and removing it from the marsh during the
jetting process. This was an attempt at instantaneous cleanup to prevent the sediment from a
prolonged stay within the jurisdictional area. These methods included driving 54" cassions
around each pile to capture the material and then pumping the material to a settling basin. Total
cost for this method for two bridge bents was approximately $1,800,000. Additionally, this
method failed to remove the material satisfactorily.
Attempts at removing the material immediately after deposition failed repeatedly. Subsequently,
the Department elected to contain the material and remove it after the piles were in place. The
jetting sediment on the west side of the bridge was eventually removed using a wooden mat road,
a Caterpillar 307 lightweight excavator and a standard front end loader.
The NCDOT has evaluated several options for dealing with the jetting sediment on the east side.
First, an alternative method of installing the piles was investigated. This foundation redesign
was not found to be feasible due to time and financial constraints. Preliminary estimates indicate
that changing the method of construction would result in a 26-week delay for redesign, retooling,
equipment acquisition, etc. It would also result in an increased cost of approximately
$10,000,000. Therefore, this option was not considered feasible.
Second, the NCDOT evaluated using the temporary work trestle and a crane to clean up and
remove the sediment. This method is described as follows:
-Clean up approximately 200 CY at each bent, 19 bents involved.
-Sediment removal with a crane with clamshell bucket
-Train will haul material in "dumpsters" or in modified rail cars to a barge at waters edge.
-Material will be placed on the barge by a barge-mounted crane.
-Material barge will be pushed by tugboat to the Load Out Trestle on the Mann's Harbor side.
-Material will be offloaded at the Load Out Trestle by the straddle crane and placed into awaiting
trucks for disposal.
-Straddle crane will load empty containers back onto material barge.
-Barge will be pushed back to the Roanoke Island side for the next bent(s) cleanup.
-Bent clean up estimated at 2 days per bent, 38 days, another 2 to 12 days for equipment
acquisition and fabrication, (i.e. clamshell bucket, dumpsters, rail cars, etc)
The assignment of dollar costs to the clean up could be in the range of $7,000 to more than
$10,000 per day.
There is the possibility that the rail and crane trestle system could be extended to non-
jurisdictional areas (i.e. near the end bent) much later in the course of construction of the bents
in the affected wetlands. The material could be transferred to the end bent as opposed to a barge
and pushed across the sound. The cost of any extension would be borne by the DOT; the
contractor's original submittal/plan did not extend the trestle to the end bent. The contractor's
intention all along has been to 'service' construction of the bridge in these east side wetlands by.
the trestle whereby supplies are brought in from awaiting barges and the like. The construction
of the trestle is designed to take place in a staged sequence. In this sequence each section of
trestle is completed only as needed. This process will start in at the farthest bent from shore
(working from barges) and work towards land. Therefore, it would take several months to reach
the point where it would be feasible to extend the trestle to non jurisdictional area. It is
estimated that direct cost (labor, materials, equipment) associated with trestle extension would
be approximately $50,000 to extend another 160 feet. This would also trigger additional indirect
costs of approximately $100,000 associated with manipulating the contractors scheduling and
labor force allocations.
DIRECT IMPACTS
Trestle Clean Up $500,000 to $1,000,000.
2
INDIRECT IMPACTS
Trestle Clean Up $2,000,000 to $3,000,000
Indirect impacts are very difficult measure at this time. It is estimated that 40 to 50 days will be
required for the clean up. This timeframe takes resources away from bridge construction. These
resources would not be earning the contractor the anticipated revenues within his earnings
schedule. This timeframe has the high potential to disrupt operations following pile installation.
Pile cap construction could be idled/delayed, thereby effecting girder erection and deck
construction. These impacts can include idled equipment and manpower and increased storage
and transportation costs for soon to be fabricated items such as girders and bearings. The idled
condition may force the contractor to take measures not originally planned for to maintain or
recover his construction schedule. The vernacular for these impacts are disruption of works, loss
of productivity, accelerative measures, extended overhead, loss of profit and loss of interest on
earnings.
TOTAL IMPACT for Trestle Cleanup: Direct + Indirect $2,500,000 to $4,000,000
The Department feels that this method is unacceptable; at even the most conservative estimate of
$2,500,000 the extended delays and extravagant costs make this alternative non-feasible.
Therefore, the NCDOT proposes to contain the sediment using silt fence and hay bales as was
allowed on the west side. The material will then be removed by a lightweight Caterpillar 307
excavator and a low ground pressure tracked loader. These lightweight pieces of equipment will
be transported to the sediment containment area via wooden mats placed on the ground. The
wooden mats will be ten feet wide. The total length of matting will be 1,903.0 feet from bridge
bent 249 to the end bent (high ground) with an additional 20.0 feet of perpendicular matting per
bent to access the containment area. Cleanup methodology will consist of utilizing the
lightweight excavator to recover the material and place it in a small pile within the containment
area. The low ground pressure tracked loader will then transport the material across the mat road
to high ground to be disposed of. Total area involved in sediment containment and cleanup will
be 2.325 acres.
The amount of pressure exerted on the mat road is expected to be significantly less than was
exerted on the mat road during sediment clean up on the west side. This is due to the utilization
of a low ground pressure tracked loader as opposed to a standard front end loader. Therefore, it
is reasonable to conclude that there will be less settling associated with the use of matting. The
total area affected by matting will be 0.524 acres. The NCDOT is committed to a full
monitoring of the affected area to insure that the marsh recovers. Monitoring will be conducted
in accordance with attached monitoring plan. Additionally, the NCDOT has acquired a property
that is currently being developed as a mitigation site. The site is near Stumpy Point, NC and will
involve the restoration of a black needle rush (Juncus roemerianus) salt marsh community. The
NCDOT fully expects the affected matting area to recover. However, the development of the
Stumpy Point mitigation site is intended to serve as a "safety net" should monitoring of the
cleanup area reveal that the recovery is not successful.
Modification # 2: Authorize the extension 'of the currently permitted Tee road by 60.0 feet
If you recall the Tee road is a section of temporary work trestle perpendicular to the bridge
alignment which allows the contractor to get as close as possible to the bent for pile installation.
The current design for the Tee road is a 60.0-foot long section of Tee road extending
perpendicularly from the temporary work trestle to the bridge bents. The trestle was proposed
the minimum practical safe distance from the bridge with the 60.0 foot Tee road extending out to
the bridge to allow a crane to stretch from the Tee road to the bridge bent. However, after a test
pile program conducted at the beginning of project construction, it was found that the 60.0 foot
Tee road was not sufficient for all of the bent construction activities on the east side.
The test pile program revealed that longer, heavier piles would be needed on the east side than
were utilized on the west side. Pile lengths were changed from an average of 35 meters (115.0
feet) to an average of 42 (138.0 feet) meters in length. The distance that has to be stretched by
the crane, coupled with the heavier and larger load, produces a situation that may cause
equipment failures and compromise personal safety of workers. Therefore, the Department
requests that the authorization be granted to extend the Tee road an additional 60.0 feet. The
proposed extension will require four additional 24" pipe piles. Please note that these piles are
temporary at each location. They will be in place only as long as pile driving activities are
taking place at that bent. The Tee road will then be dismantled and moved to the next bent.
Please see the attached construction drawings for reference.
Modification #3: Authorize a temporary floating dock
The contractor has requested permission to build a temporary floating dock at load-out trestle
bent number four. The temporary floating dock will be used to dock construction vessels as well
as on and off load construction equipment and workers. The dock will be approximately 6.096
meters x 6.096 meters (20.0 feet x 20.0 feet). This will require the installation of six 0.304-meter
(12.0-inch) steel cylinder piles. Please see the attached construction drawings for reference.
Modification #4: Authorize mooring piles and temporary trestle stabilization measures
The contractor has requested permission to construct four 0.919-meter (36.0-inch) steel mooring
piles at bent thirteen of the load-out trestle. The mooring piles will be used for construction
barges. The barges will tie to the mooring piles while loading or unloading construction
equipment and supplies. This will result in an increased demand and stress on the temporary
trestle. Therefore, we are also requesting authorization to install H-beams for stabilization at
load-out trestle bents 6, 8, 10, 11, 12, and 13. Additionally, two 0.6096-meter (24.0-inch) steel
cylinder piles will be installed at load-out trestle bent number 10. Designs for the stabilization is
included in the construction drawings.
Modification #5: Authorize minimum use of jetting to loosen temporary trestle piles
The original plan for the utilization of this trestle called for the temporary support piles to be
vibrated out and for the trestle to be moved to the east side of the Croatan Sound. However,
recent attempts to remove the temporary piles by vibration have been unsuccessful.
The NCDOT has determined that the piles can be loosened and removed with a minimal use of
"jetting". A very minor amount of material may surface from the pile loosening. Any material
produced by this operation will be raked into the void left by the removed piling. If there is not
enough material to fill the void, the hole will be filled to the elevation of the adjacent ground
with clean sand. Per our telephone conversation of September 14, 1999, the NCDOT will utilize
the above described technique to remove one piling. After removal, the USACE and the
NCDCM will be consulted on site to determine if this method of piling removal is satisfactory.
Your consideration is requested in processing this proposal as a "minor" modification. An
expedited approval is essential to meeting critical project scheduling. Please call me if I can
provide any additional information.
Sincerely,
D. R. Conner, P. E.
Division Enginn/er
T. Linds ddick, Jr.
Division Environmental Officer-Division One
CC: Mr. R. E. Capehart, P. E.
Mr. R. W. Midgett, P. E.
Mr. Frank Jennings, NCDCM
Mr. David Cox, NCWRC
Ms. Sarah Winslow, NCDMF
Mr. John Hennessy, NCDWQ
Mr. Ron Sechler, NMF
Mr. Doug Huggett, NCDCM
Mr. Randy K. Wise, P. E.
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Monitoring Plan for the recovery of the disturbed marsh area adjacent to the new
Croatan Sound Bridge
The plan consists of monitoring the disturbed site to determine the success of vegetative recovery
occurring within it. The existing undisturbed marsh, dominated by black needle rush (Juncus
roemerianus), adjacent to the disturbed site will be evaluated in January, 2000, and will be used
as a reference marsh to determine the degree of recovery. Three plots measuring 1 meter by 1
meter will be selected randomly and the percent aerial vegetative coverage will be evaluated and
used as a baseline reference.
The disturbed area will be allowed to recover naturally from existing plant material and seed
source present. Vegetative monitoring will be conducted annually beginning in January of 2000.
The monitoring will consist of randomly selecting 12 plots in the disturbed area, measuring 1
meter by 1 meter, and comparing the level of regeneration to the reference marsh. The area will
be evaluated after one full growing season in September of 2000 to determine if replanting with
black needle rush will be necessary. If replanting is deemed necessary, NCDOT will prepare a
planting plan and submit it to the USACE and the NCDCM for approval. All efforts will be
made to utilize a local seed source if plantings are required. If there are any areas where
compaction has prevented natural regeneration from occurring, hand labor will be used to scarify
the area to remediate the compaction. Areas that require scarification will be planted with black
needle rush and monitored accordingly.
As required, there will be a zero tolerance for phragmites (Phragmites communis). If the
presence of this species is detected, measures will be taken immediately to eradicate this species
from the site.
Monitoring reports will be submitted by December 31St of each year for a period of five years.
The disturbed area will be considered recovered when aerial vegetative coverage has been
determined to meet or exceed 90% of the coverage found in the reference marsh. If after a
period of three years, it is determined that recovery efforts are not succeeding, the North
Carolina Department of Transportation will consult with the U. S. Army Corps of Engineers and
the North Carolina Division of Coastal Management to discuss necessary remedial action.

JAMES B. HUNT JR.
GovENOR
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
d?a S7ATFp ?.
November 12, 1999
DAVID McCOY
SECRETARY
Michael F. Bell, P.W.S., Regulatory Project Manager
U. S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. Box 1000 PAYMENT
Washington, North Carolina 28779
Dear Mr. Bell:
RECEIVED
SUBJECT: Proposed Minor Modification to Department of the Army Permit
No. 199502334: Improvements to US 64-264, Including the construction of a new Croatan Sound
bridge, from west of Manns Harbor to NC 345, south of Manteo, in Dare County; Federal Aid
Project No. NHF-64 (6); State Project No. 8.T051401; TIP No. R-2551.
The Department of Transportation requests that the existing DOA Permit be modified to (1)
authorize pile jetting and cleanup; and (2) authorize an extension of the currently permitted Tee
road by 60.0 feet; and 3) authorize a temporary floating dock; and 4) authorize mooring piles and
stabilization measures for the temporary load-out trestle; 5) authorize a minimal use of jetting to
loosen temporary trestle piles for removal on both the west and east sides.
Modification #1: Authorize pile jetting and cleanup
The North Carolina Department of Transportation (NCDOT) is currently constructing a new
bridge over the Croatan Sound. As you are aware, the piles are being placed by the construction
method known as jetting. Jetting produces a mixture of sediment and water that is dispersed into
the marsh adjacent to the bridge bents. You will also recall that the NCDOT has attempted to
institute several methods of capturing the material and removing it from the marsh during the
jetting process. This was an attempt at instantaneous cleanup to prevent the sediment from a
prolonged stay within the jurisdictional area. These methods included driving 54" cassions
around each pile to capture the material and then pumping the material to a settling basin. Total
cost for this method for two bridge bents was approximately $1,800,000. Additionally, this
method failed to remove the material satisfactorily.
Attempts at removing the material immediately after deposition failed repeatedly. Subsequently,
the Department elected to contain the material and remove it after the piles were in place. The
jetting sediment on the west side of the bridge was eventually removed using a wooden mat road,
a Caterpillar 307 lightweight excavator and a standard front end loader.
The NCDOT has evaluated several options for dealing with the jetting sediment on the east side.
First, an alternative method of installing the piles was investigated. This foundation redesign
was not found to be feasible due to time and financial constraints. Preliminary estimates indicate
that changing the method of construction would result in a 26-week delay for redesign, retooling,
equipment acquisition, etc. It would also result in an increased cost of approximately
$10,000,000. Therefore, this option was not considered feasible.
Second, the NCDOT evaluated using the temporary work trestle and a crane to clean up and
remove the sediment. This method is described as follows:
-Clean up approximately 200 CY at each bent, 19 bents involved.
-Sediment removal with a crane with clamshell bucket
-Train will haul material in "dumpsters" or in modified rail cars to a barge at waters edge.
-Material will be placed on the barge by a barge-mounted crane.
-Material barge will be pushed by tugboat to the Load Out Trestle on the Mann's Harbor side.
-Material will be offloaded at the Load Out Trestle by the straddle crane and placed into awaiting
trucks for disposal.
-Straddle crane will load empty containers back onto material barge.
-Barge will be pushed back to the Roanoke Island side for the next bent(s) cleanup.
-Bent clean up estimated at 2 days per bent, 38 days, another 2 to 12 days for equipment
acquisition and fabrication, (i.e. clamshell bucket, dumpsters, rail cars, etc)
The assignment of dollar costs to the clean up could be in the range of $7,000 to more than
$10,000 per day.
There is the possibility that the rail and crane trestle system could be extended to non-
jurisdictional areas (i.e. near the end bent) much later in the course of construction of the bents
in the affected wetlands. The material could be transferred to the end bent as opposed to a barge
and pushed across the sound. The cost of any extension would be borne by the DOT; the
contractor's original submittal/plan did not extend the trestle to the end bent. The contractor's
intention all along has been to 'service' construction of the bridge in these east side wetlands by
the trestle whereby supplies are brought in from awaiting barges and the like. The construction
of the trestle is designed to take place in a staged sequence. In this sequence each section of
trestle is completed only as needed. This process will start in at the farthest bent from shore
(working from barges) and work towards land. Therefore, it would take several months to reach
the point where it would be feasible to extend the trestle to non jurisdictional area. It is
estimated that direct cost (labor, materials, equipment) associated with trestle extension would
be approximately $50,000 to extend another 160 feet. This would also trigger additional indirect
costs of approximately $100,000 associated with manipulating the contractors scheduling and
labor force allocations.
DIRECT IMPACTS
Trestle Clean Up $500,000 to $1,000,000.
INDIRECT IMPACTS
Trestle Clean Up $2,000,000 to $3,000,000
Indirect impacts are very difficult measure at this time. It is estimated that 40 to 50 days will be
required for the clean up. This timeframe takes resources away from bridge construction. These
resources would not be earning the contractor the anticipated revenues within his earnings
schedule. This timeframe has the high potential to disrupt operations following pile installation.
Pile cap construction could be idled/delayed, thereby effecting girder erection and deck
construction. These impacts can include idled equipment and manpower and increased storage
and transportation costs for soon to be fabricated items such as girders and bearings. The idled
condition may force the contractor to take measures not originally planned for to maintain or
recover his construction schedule. The vernacular for these impacts are disruption of works, loss
of productivity, accelerative measures, extended overhead, loss of profit and loss of interest on
earnings.
TOTAL IMPACT for Trestle Cleanup: Direct + Indirect $2,500,000 to $4,000,000
The Department feels that this method is unacceptable; at even the most conservative estimate of
$2,500,000 the extended delays and extravagant costs make this alternative non-feasible.
Therefore, the NCDOT proposes to contain the sediment using silt fence and hay bales as was
allowed on the west side. The material will then be removed by a lightweight Caterpillar 307
excavator and a low ground pressure tracked loader. These lightweight pieces of equipment will
be transported to the sediment containment area via wooden mats placed on the ground. The
wooden mats will be ten feet wide. The total length of matting will be 1,903.0 feet from bridge
bent 249 to the end bent (high ground) with an additional 20.0 feet of perpendicular matting per
bent to access the containment area. Cleanup methodology will consist of utilizing the
lightweight excavator to recover the material and place it in a small pile within the containment
area. The low ground pressure tracked loader will then transport the material across the mat road
to high ground to be disposed of. Total area involved in sediment containment and cleanup will
be 2.325 acres.
The amount of pressure exerted on the mat road is expected to be significantly less than was
exerted on the mat road during sediment clean up on the west side. This is due to the utilization
of a low ground pressure tracked loader as opposed to a standard front end loader. Therefore, it
is reasonable to conclude that there will be less settling associated with the use of matting. The
total area affected by matting will be 0.524 acres. The NCDOT is committed to a full
monitoring of the affected area to insure that the marsh recovers. Monitoring will be conducted
in accordance with attached monitoring plan. Additionally, the NCDOT has acquired a property
that is currently being developed as a mitigation site. The site is near Stumpy Point, NC and will
involve the restoration of a black needle rush (Juncus roemerianus) salt marsh community. The
NCDOT fully expects the affected matting area to recover. However, the development of the
Stumpy Point mitigation site is intended to serve as a "safety net" should monitoring of the
cleanup area reveal that the recovery is not successful.
Modification # 2• Authorize the extension 'of the currently permitted Tee road by 60.0 feet
If you recall the Tee road is a section of temporary work trestle perpendicular to the bridge
alignment which allows the contractor to get as close as possible to the bent for pile installation.
The current design for the Tee road is a 60.0-foot long section of Tee road extending
perpendicularly from the temporary work trestle to the bridge bents. The trestle was proposed
the minimum practical safe distance from the bridge with the 60.0 foot Tee road extending out to
the bridge to allow a crane to stretch from the Tee road to the bridge bent. However, after a test
pile program conducted at the beginning of project construction, it was found that the 60.0 foot
Tee road was not sufficient for all of the bent construction activities on the east side.
The test pile program revealed that longer, heavier piles would be needed on the east side than
were utilized on the west side. Pile lengths were changed from an average of 35 meters (115.0
feet) to an average of 42 (138.0 feet) meters in length. The distance that has to be stretched by
the crane, coupled with the heavier and larger load, produces a situation that may cause
equipment failures and compromise personal safety of workers. Therefore, the Department
requests that the authorization be granted to extend the Tee road an additional 60.0 feet. The
proposed extension will require four additional 24" pipe piles. Please note that these piles are
temporary at each location. They will be in place only as long as pile driving activities are
taking place at that bent. The Tee road will then be dismantled and moved to the next bent.
Please see the attached construction drawings for reference.
Modification #3: Authorize a temporary floating dock
The contractor has requested permission to build a temporary floating dock at load-out trestle
bent number four. The temporary floating dock will be used to dock construction vessels as well
as on and off load construction equipment and workers. The dock will be approximately 6.096
meters x 6.096 meters (20.0 feet x 20.0 feet). This will require the installation of six 0.304-meter
(12.0-inch) steel cylinder piles. Please see the attached construction drawings for reference.
Modification #4: Authorize mooring piles and temporary trestle stabilization measures
The contractor has requested permission to construct four 0.919-meter (36.0-inch) steel mooring
piles at bent thirteen of the load-out trestle. The mooring piles will be used for construction
barges. The barges will tie to the mooring piles while loading or unloading construction
equipment and supplies. This will result in an increased demand and stress on the temporary
trestle. Therefore, we are also requesting authorization to install H-beams for stabilization at
load-out trestle bents 6, 8, 10, 11, 12, and 13. Additionally, two 0.6096-meter (24.0-inch) steel
cylinder piles will be installed at load-out trestle bent number 10. Designs for the stabilization is
included in the construction drawings.
4
Modification #5: Authorize minimum use of jetting to loosen temporary trestle piles
The original plan for the utilization of this trestle called for the temporary support piles to be
vibrated out and for the trestle to be moved to the east side of the Croatan Sound. However,
recent attempts to remove the temporary piles by vibration have been unsuccessful.
The NCDOT has determined that the piles can be loosened and removed with a minimal use of
"jetting". A very minor amount of material may surface from the pile loosening. Any material
produced by this operation will be raked into the void left by the removed piling. If there is not
enough material to fill the void, the hole will be filled to the elevation of the adjacent ground
with clean sand. Per our telephone conversation of September 14, 1999, the NCDOT will utilize
the above described technique to remove one piling. After removal, the USACE and the
NCDCM will be consulted on site to determine if this method of piling removal is satisfactory.
Your consideration is requested in processing this proposal as a "minor" modification. An
expedited approval is essential to meeting critical project scheduling. Please call me if I can
provide any additional information.
Sincerely,
D. R. Conner, P. E.
Division Enginner
T. Linds -ddick, Jr.
Division Environmental Officer-Division One
CC: Mr. R. E. Capehart, P. E.
Mr. R. W. Midgett, P. E.
Mr. Frank Jennings, NCDCM
Mr. David Cox, NCWRC
Ms. Sarah Winslow, NCDMF
Mr. John Hennessy, NCDWQ
Mr. Ron Sechler, NMF r
Mr. Doug Huggett, NCDCM
Mr, Randy K. Wise, P. E.
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Monitoring Plan for the recovery of the disturbed marsh area adjacent to the new
Croatan Sound Bridge
The plan consists of monitoring the disturbed site to determine the success of vegetative recovery
occurring within it. The existing undisturbed marsh, dominated by black needle rush (Juncus
roemerianus), adjacent to the disturbed site will be evaluated in January, 2000, and will be used
as a reference marsh to determine the degree of recovery. Three plots measuring 1 meter by 1
meter will be selected randomly and the percent aerial vegetative coverage will be evaluated and
used as a baseline reference.
The disturbed area will be allowed to recover naturally from existing plant material and seed
source present. Vegetative monitoring will be conducted annually beginning in January of 2000.
The monitoring will consist of randomly selecting 12 plots in the disturbed area, measuring 1
meter by 1 meter, and comparing the level of regeneration to the reference marsh. The area will
be evaluated after one full growing season in September of 2000 to determine if replanting with
black needle rush will be necessary. If replanting is deemed necessary, NCDOT will prepare a
planting plan and submit it to the USACE and the NCDCM for approval. All efforts will be
made to utilize a local seed source if plantings are required. If there are any areas where
compaction has prevented natural regeneration from occurring, hand labor will be used to scarify
the area to remediate the compaction. Areas that require scarification will be planted with black
needle rush and monitored accordingly.
As required, there will be a zero tolerance for phragmites (Phragmites communis). If the
presence of this species is detected, measures will be taken immediately to eradicate this species
from the site.
Monitoring reports will be submitted by December 31" of each year for a period of five years.
The disturbed area will be considered recovered when aerial vegetative coverage has been
determined to meet or exceed 90% of the coverage found in the reference marsh. If after a
period of three years, it is determined that recovery efforts are not succeeding, the North
Carolina Department of Transportation will consult with the U. S. Army Corps of Engineers and
the North Carolina Division of Coastal Management to discuss necessary remedial action.
- NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
MEMORANDUM 12/21/99 DIVISION OF COASTAL MANAGEMENT
WAYNE MCDEVITT
SECRETARY
TO: Division of Community Assistance
Division of Land Resources, Land Quality Section /
Division of Water Quality, 401 Certification Program
Division of Water Quality, Storm Water Management Program
State Property Office
Division of Archives & History
Division of Environmental Health `
Division of Highways
Wildlife Resources Commission
Division of Water Resources
Wis.. .
Division of Marine Fisheries
Division of Marine Fisheries, Submerged Lands
CC: Mike Bell, USACE Washington Regulatory Field Office
FROM: Cathy Brittingham, Transportation Project Coordinator
SUBJECT: Public Notice for Department of the Army Permit Modification Request from the
N.C. Department of Transportation
PROJECT: Improvements to US 64-264, including the construction of a new Croatan Sound
bridge, from west of Manns Harbor to NC 345 South of Manteo, in Dare County;
Federal Aid Project No. NHF-64(6); State Project No. 8.T051401; T.I.P. NO. R-2551.
The above listed document is being circulated to you for review and comment. Written comments
regarding the application for Clean Water Act certification should be delivered to the NC Division of
Water Quality, Wetland/401 Unit, on or before December 27, 1999, attention: Mr. John Dorney.
Written comments pertinent to the proposed work should be delivered to the U.S. Army Corps of
Engineers, Washington Regulatory Field Office, until 4:15 pm, January 3, 2000, attention: Mr.
Michael F. Bell, or telephone [phone], extension 26.
Please send a copy of any written comments to the NC Division of Coastal Management at the
address listed below. Thank you for your consideration.
REPLY
This agency has no objection to the project as proposed.
This agency has no comment on the proposed project.
Signed
This agency approves of the project, only if the recommended changes are
incorporated. See attached.
- This agency objects to the project for reasons described in the attached memo.
Date
1638 MAIL SERVICE CENTER, RALEIGH, NC 27699-1638
2728 CAPITAL BLVD., RALEIGH, NC 27604
PHONE [phone] FAX [phone]
AN EQUAL OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/10% POST-CONSUMER PAPER
DEPARTMENT OF THE ARMY
Wilmington District, Corps of Engineers
Post Office Box 1890
Wilmington, North Carolina 28402-1890
ACTION ID No. 199502334
PUBLIC NOTICE
PERMIT MODIFICATION
M" IV
DEC 0 6 1999
COASTAL MANAGEMENT
December 2, 1999
THE NORTH CAROLINA DEPARTMENT OF TRANSPORTATION (NCDOT), DIVISION
OF HIGHWAYS, Post Office Box 25201, Raleigh, North Carolina 27611-5201, was issued, on
March 5, 1998, a Department of the Army (DA) permit TO FILL 13.22 ACRES OF SECTION 404
WETLANDS, MECHANIZE LAND CLEAR 3.83 ACRES OF SECTION 404 WETLANDS,
DRAIN 2.79 ACRES OF SECTION 404 WETLANDS, AND FILL 0.05 ACRES OF OPEN
WATERS OF THE UNITED STATES ADJACENT TO THE CROATAN SOUND, SPENCER'S
CREEK AND UNNAMED TRIBUTARIES. THE NCDOT PROPOSES TO WIDEN
APPROXIMATELY 10 MILES OF U.S. 64-264, INCLUDING CONSTRUCTING A NEW
BRIDGE OVER THE CROATAN SOUND AND ADJACENT MARSHES, FROM
US, 64-264 WEST OF MANNS HARBOR TO NC 345 SOUTH OF MANTEO, IN DARE
COUNTY, NORTH CAROLINA, TIP NO. R-2551, FEDERAL AID PROJECT NO.
NHF-64(6), STATE PROJECT NO. 8.T051401. The permittee has applied for a modification
to the permit to:
1. Pile jetting, temporary fill, and associated cleanup in an additional 2.325 acres of Section 10
and 404 Wetlands adjacent to the Croatan Sound, within a sediment containment area at 19 bent
locations in a black needle rush marsh community on the eastern side of the permitted project. An
additional 0.524 acres of impact will be associated with 1,903 linear feet of matting to access the
containment areas, for a total of 2.849 acres. NCDOT proposes to contain the jetted sediment using
silt fence and hay bales. A lightweight Caterpillar 307 excavator will then remove the material to a
low ground pressure tracked loader. The material will be ultimately transported to an offsite upland
sediment containment area via wooden mats (10 feet wide) placed on the marsh.
Attached to this public notice is a monitoring plan for the recovery of the disturbed marsh area
impacted by the matted construction access road.
2. Extend the permitted Tee road in Croatan Sound by 60 feet. The results of a test pile program
indicated the permitted proposal was not sufficient for all the bent construction activities on the
eastern side of the permitted project. The test pile program revealed that longer, heavier piles would
be needed on the east side.
2
3. Construct a temporary floating moorage facility within Croatan Sound at load-out trestle bent
number four. The temporary facility will be used to dock construction vessels as well as on and off
load construction equipment and workers. The proposed facility will be 20 x 20 feet and require the
installation of six 12" steel cylinder pipes.
4. Install mooring piles and temporary stabilization measures within Croatan Sound at load-out
trestle bents 6, 8, 11, 12 and 13. The 36 inch steel mooring piles will be located at bents 10 and 13
and will be used while loading and unloading construction equipment and supplies. "H" beam
stabilizers at bents 6, 8, 10, 11, 12 and 13 are requested for safety.
Construction plans are included with this public notice along with the applicant's modification
request that includes an analysis of alternatives for the pile jetting and associated cleanup.
The State of North Carolina will review this public notice to determine the need for the applicant
to obtain any required State authorization. No Department of the Army (DA) permit will be
modified until the coordinated State viewpoint on the proposal has been received and reviewed by
this agency, nor will a DA permit -be modified until the North Carolina Division of Environmental
management (NCDEM) has determined the applicability of a Water Quality Certification as
required by PL 92-500.
This modification is being considered pursuant to Section 404 of the Clean Water Act
(33 U.S.C. 1344). Any person may request, in writing within the comment period specified in
the notice, that a public hearing be held to consider this application. Requests for public hearing
shall state, with particularity, the reasons for holding a public hearing.
The District Engineer has consulted the latest published version of the National Register of
Historic Places for the presence or absence of registered properties, or properties listed as being
eligible for inclusion therein, and this worksite is not a registered property or property listed as
being eligible for inclusion in the Register. Consultation of the National Register constitutes the
extent of cultural resource investigations by the District Engineer, and he is otherwise unaware of
the presence of such resources. Presently, unknown archeological, scientific, prehistorical, or
historical data may be lost or destroyed by work under the requested permit modification.
The District Engineer is not aware, based on available information, that the proposed activity
will affect species, or their critical habitat, designated as endangered or threatened pursuant to the
Endangered Species Act of 1973.
This notice initiates the Essential Fish Habitat (EFH) consultation requirements of the
Magnuson-Stevens Fishery Conservation and Management Act. The DE's initial determination is
that the proposed project would not adversely impact EFH or associated fisheries managed by the
South Atlantic or Mid Atlantic Fishery Councils or the NMFS.

3
The decision whether to issue a permit modification will be based on an evaluation of the
probable impacts, including cumulative impacts, of the proposed activity and its intended use on the
public interest. Evaluation of the probable impacts which the proposed activity may have
on the public interest requires a careful weighing of all those factors which become relevant in each
particular case. The benefits which reasonably may be expected to accrue from the proposal must
be balanced against its reasonably foreseeable detriments. The decision whether to authorize a
proposal, and if so the conditions under which it will be allowed to occur, are therefore determined
by the outcome of the general balancing process. That decision should reflect the national concern
for both protection and utilization of important resources. All factors which may be relevant to the
proposal must be considered including the cumulative effects thereof. Among those are
conservation, economics, aesthetics, general environmental concerns, wetlands, cultural values, fish
and wildlife values, flood hazards and flood plain values (in accordance with Executive Order
11988), land use, navigation, shore erosion and accretion, recreation, water supply and conservation,
water quality, energy needs, safety, food and fiber production, mineral needs, considerations of
property ownership, and, in general, the needs and welfare of the people. For activities involving
the placement of dredged or fill materials in waters of the United States, a permit modification will
be denied if the discharge that would be authorized by such modification would not comply with the
Environmental Protection Agencies' 404(b)(1) guidelines. Subject to the preceding sentence and
any other applicable guidelines or criteria, a permit modification will be granted unless the District
Engineer determines that it would be contrary to the public interest.
Generally, the decision whether to issue this Department of the Army (DA) permit modification
will not be made until the North Carolina Division of Water Quality (NCDWQ) issues, denies, or
waives State certification required by Section 401 of the Clean Water Act. The NCDWQ considers
whether or not the proposed activity will comply with Sections 301, 302, 306, and 307 of the Clean
Water Act. The application and this public notice for the DA permit serves
as application to the NCDWQ for certification.
Additional information regarding the Clean Water Act certification may be reviewed at the
offices of the North Carolina Division of Water Quality (NCDWQ), Wetland/401 Unit, 4401 Reedy
Creek Road, Raleigh, North Carolina 27607. Copies of such materials will be furnished to any
person requesting copies upon payment of reproduction costs.
All persons desiring to make comments regarding the application for Crean Water Act
certification should do so in writing delivered to the North Carolina Division of Water Quality
(NCDWQ), Wetland/401 Unit, 1621 Mail Service Center, Raleigh, North Carolina 27699-1621, on
or before December 27, 1999, Attention: Mr. John Dorney.
Written comments pertinent to the proposed work, as outlined above, will be
received in this office, Attn: Michael F. Bell, Washington Regulatory Field Office, Post
Office Box 1000, Washington, North Carolina 27889-1000, until 4:15 p.m., January 3, 2000,
or telephone [phone], extension 26.

Mme.
a-v
STATE of NORTH CAROLINA ?r "
OF TRANSPORTATION
JAMES B. HL-+-I' JR.
GOVENOR
November 12, 1999
Michael F. Bell, P.W.S., Regulatory Project Manager
U. S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. Box 1000
Washington, North Carolina 28779
Dear Mr. Bell:
DAVID McCOY
SECRETARY
SUBJECT: Proposed Minor Modification to Department of the Army Permit
No. 199502334: Improvements to US 64-264, Including the construction of a new Croatan Sound
bride, from west of Manns Harbor to NC 345, south of Manteo, in Dare County; Federal Aid
Project No. NEF-64 (6); State Project No. 8.T051401; TIP No. R-2551.
The Department of Transportation requests that the existing DOA Permit be modified to (1)
authorize pile jetting and cleanup; and (2) authorize an extension of the currently permitted Tee
road by 60.0 feet; and 3) authorize a temporary floating dock; and 4) authorize mooring piles and
stabilization measures for the temporary load-out trestle; 5) authorize a minimal use of jetting to
loosen temporary trestle piles for removal on both the west and east sides.
Modification #1: Authorize pile jetting and cleanup
The North Carolina Department of Transportation (NCDOT) is currently constructing a new
bridge over the Croatan Sound. As you are aware, the piles are being placed by the construction
method known as jetting. Jetting produces a mixture of sediment and water that is dispersed into
the marsh adjacent to the bridge bents. You will also recall that the NCDOT has attempted to
institute several methods of capturing the material and removing it from the marsh during the
jetting process. This was an attempt at instantaneous cleanup to prevent the sediment from a
prolonged stay within the jurisdictional area. These methods included driving 54" cassions
around each pile to capture the material and then pumping the material to a settling basin. Total
cost for this method for two bridge bents was approximately $1,800,000. Additionally,'this
method failed to remove the material satisfactorily.
Attempts at removing the material immediately after deposition failed repeatedly. Subsequently,
the Department elected to contain the material and remove it after the piles were in place. The
jetting sediment on the west side of the bridge was eventually removed using a wooden mat road,
a Caterpillar 307 lightweight excavator and a standard front end loader.
The NCDOT has evaluated several options for dealing with the jetting sediment on the east side.
First, an alternative method of installing the piles was investigated. This foundation redesign
was not found to be feasible due to time and financial constraints. Preliminary estimates indicate
that changing the method of construction would result in a 26-week delay for redesign, retooling,
equipment acquisition, etc. It would also result in an increased cost of approximately
$10,000,000. Therefore, this option was not considered feasible.
Second, the NCDOT evaluated using the temporary work trestle and a crane to clean up and
remove the sediment. This method is described as follows:
-Clean up approximately 200 CY at each bent, 19 bents involved.
-Sediment removal with a crane with clamshell bucket
-Train will haul material in "dumpsters" or in modified rail cars to a barge at waters edge.
-Material will be placed on the barge by a barge-mounted crane.
-Material barge will be pushed by tugboat to the Load Out Trestle on the Mann's Harbor side.
-Material will be offloaded at the Load Out Trestle by the straddle crane and placed into awaiting
trucks for disposal.
-Straddle crane will load empty containers back onto material barge.
-Barge will be pushed back to the Roanoke Island side for the next bent(s) cleanup.
-Bent clean up estimated at 2 days per bent, 38 days, another 2 to 12 days for equipment
acquisition and fabrication, (i.e. clamshell bucket, dumpsters, rail cars, etc)
The assignment of dollar costs to the clean up could be in the range of $7,000 to more than
$10,000 per day.
There is the possibility that the rail and crane trestle system could be extended to non-
jurisdictional areas (i.e. near the end bent) much later in the course of construction of the bents
in the affected wetlands. The material could be transferred to the end bent as opposed to a barge
and pushed across the sound. The cost of any extension would be borne by the DOT; the
contractor's original submittal/plan did not extend the trestle to the end bent. The contractor's
intention all along has been to 'service' construction of the bridge in these east side wetlands by
the trestle whereby supplies are brought in from awaiting barges and the like. The construction
of the trestle is designed to take place in a staged sequence. In this sequence each section of
trestle is completed only as needed. This process will start in at the farthest bent from shore
(working from barges) and work towards land. Therefore, it would take several months to reach
the point where it would be feasible to extend the trestle to non jurisdictional area. It is
estimated that direct cost (labor, materials, equipment) associated with trestle extension would
be approximately $50,000 to extend another 160 feet. This would also trigger additional indirect
costs of approximately $100,000 associated with manipulating the contractors scheduling and
labor force allocations.
DIRECT IMPACTS
Trestle Clean Up $500,000 to $1,000,000.
2
INDIRECT IMPACT
Trestle Clean Up 52,000,000 to S3,000,000
Indirect impacts are very difficult measure at this time. It is estimated that 40 to 50 days will be
required for the clean up. This timeframe takes resources away from bridge construction. These
resources would not be earnina the contractor the anticipated revenues within his earnings
schedule. This timeframe has the high potential to disrupt operations following pile installation.
Pile cap construction could be idled/delayed, thereby effecting girder erection and deck
construction. These impacts can include idled equipment and manpower and increased storage
and transportation costs for soon to be fabricated items such as girders and bearings. The idled
condition may force the contractor to take measures not originally planned for to maintain or
recover his construction schedule. The vernacular for these impacts are disruption of works, loss
of productivity, accelerative measures, extended overhead, loss of profit and loss of interest on
earnings.
TOTAL IMPACT for Trestle Cleanup: Direct + Indirect S2,500,000 to $4,000,000
The Department feels that this method is unacceptable; at even the most conservative estimate of
52,500,000 the extended delays and extravagant costs make this alternative non-feasible.
Therefore, the NCDOT proposes to contain the sediment using silt fence and hay bales as was
allowed on the west side. The material will then be removed by a lightweight Caterpillar 307
excavator and a low ground pressure tracked loader. These lightweight pieces of equipment will
be transported to the sediment containment area via wooden mats placed on the ground. The
wooden mats will be ten feet wide. The total length of matting will be 1,903.0 feet from bridge
bent 249 to the end bent (high ground) with an additional 20.0 feet of perpendicular matting per
bent to access the containment area. Cleanup methodology will consist of utilizing the
lightweight excavator to recover the material and place it in a small pile within the containment
area. The low ground pressure tracked loader will then transport the material across the mat road
to high ground to be disposed of. Total area involved in sediment containment and cleanup will
be 2.325 acres.
The amount of pressure exerted on the mat road is expected to be significantly less than was
exerted on the mat road during sediment clean up on the west side. This is due to the utilization
of a low ground pressure tracked loader as opposed to a standard front end loader. Therefore, it
is reasonable to conclude that there will be less settling associated with the use of matting. The
total area affected by matting will be 0.524 acres. The NCDOT is committed to a full
monitoring of the affected area to insure that the marsh recovers. Monitoring will be conducted
in accordance with attached monitoring plan. Additionally, the NCDOT has acquired a property
that is currently being developed as a mitigation site. The site is near Stumpy Point, NC and will
involve the restoration of a black needle rush (Juncus roemerianus) salt marsh community. The
NCDOT fully expects the affected matting area to recover. However, the development of the
Stumpy Point mitigation site is intended to serve as a "safety net" should monitoring of the
cleanup area reveal that the recovery is not successful.
Modification # 2: Authorize the extension'of the currently permitted Tee road by 60.0 feet
If you recall the Tee road is a section of temporary work trestle perpendicular to the bridge
alignment which allows the contractor to get as close as possible to the bent for pile installation.
The current design for the Tee road is a 60.0-foot long section of Tee road extending
perpendicularly from the temporary work trestle to the bridge bents. The trestle was proposed
the minimum practical safe distance from the bridge with the 60.0 foot Tee road extending out to
the bridge to allow a crane to stretch from the Tee road to the bridge bent. However, after a test
pile program conducted at the beginning of project construction, it was found that the 60.0 foot
Tee road was not sufficient for all of the bent construction activities on the east side.
The test pile program revealed that longer, heavier piles would be needed on the east side than
were utilized on the west side. Pile lengths were changed from an average of 35 meters (115.0
feet) to an average of 42 (138.0 feet) meters in length. The distance that has to be stretched by
the crane, coupled with the heavier and larger load, produces a situation that may cause
equipment failures and compromise personal safety of workers. Therefore, the Department
requests that the authorization be granted to extend the Tee road an additional 60.0 feet. The
proposed extension will require four additional 24" pipe piles. Please note that these piles are
temporary at each location. They will be in place only as long as pile driving activities are
taking place at that bent. The Tee road will then be dismantled and moved to the next bent.
Please see the attached construction drawings for reference.
Modification #3: Authorize a temporary floating dock
The contractor has requested permission to build a temporary floating dock at load-out trestle
bent number four. The temporary floating dock will be used to dock construction vessels as well
as on and off load construction equipment and workers. The dock will be approximately 6.096
meters x 6.096 meters (20.0 feet x 20.0 feet). This will require the installation of six 0.304-meter
(12.0-inch) steel cylinder piles. Please see the attached construction drawings for reference.
Modification 44: Authorize mooring piles and temporary trestle stabilization measures
The contractor has requested permission to congruct four 0.919-meter (36.0-inch) steel mooring
piles at bent thirteen of the load-out trestle. The mooring piles will be used for construction
barges. The barges will tie to the mooring piles while loading or unloading construction
equipment and supplies. This will result in an increased demand and stress on the temporary
trestle. Therefore, we are also requesting authorization to install H-beams for stabilization at
load-out trestle bents 6, 8, 10, 11, 12, and 13. Additionally, two 0.6096-meter (24.0-inch) steel
cylinder piles will be installed at load-out trestle bent number 10. Designs for the stabilization is
included in the construction drawings.
4
Modification #5: Authorize minimum use of jetting to loosen temporary trestle piles
The original plan for the utilization of this trestle called for the temporary support piles to be
vibrated out and for the trestle to be moved to the east side of the Croatan Sound. However,
recent attempts to remove the temporary piles by vibration have been unsuccessful.
The NCDOT has determined that the piles can be loosened and removed with a minimal use of
"jetting". A very minor amount of material may surface from the pile loosening. Any material
produced by this operation will be raked into the void left by the removed piling. If there is not
enough material to fill the void, the hole will be filled to the elevation of the adjacent ground
with clean sand. Per our telephone conversation of September 14, 1999, the NCDOT will utilize
the above described technique to remove one piling. After removal, the USACE and the
NCDCM will be consulted on site to determine if this method of piling removal is satisfactory.
Your consideration is requested in processing this proposal as a "minor" modification. An
expedited approval is essential to meeting critical project scheduling. Please call me if I can
provide any additional information.
Sincerely,
D. R. Conner, P. E.
Division Enginner
T. Linds ddick, Jr.
Division Environmental Officer-Division One
CC: Mr. R. E. Capehart, P. E.
Mr. R. W. Midgett, P. E.
Mr. Frank Jennings, NCDCM
Mr. David Cox, NCWRC
Ms. Sarah Winslow, NCDMF
Mr. John Hennessy, NCDWQ
Mr. Ron Sechler, NMF
Mr. Doug Huggett, NCDCM
Mr. Randy K. Wise, P. E.
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Monitoring Plan for the recovery of the disturbed marsh area adjacent to the new
Croatan Sound Bridge
The plan consists of monitoring the disturbed site to determine the success of vegetative recovery
occurring within it. The existing undisturbed marsh, dominated by black needle rush (Juncus
roemerianus), adjacent to the disturbed site will be evaluated in January, 2000, and will be used
as a reference marsh to determine the degree of recover-. Three plots measuring 1 meter by 1
meter will be selected randomly and the percent aerial vegetative coverage will be evaluated and
used as a baseline reference.
The disturbed area will be allowed to recover naturally from existing plant material and seed
source present. Vegetative monitoring will be conducted annuall%- beginning in January of 2000.
The monitoring will consist of randomly selecting 12 plots in the disturbed area, measuring 1
meter by 1 meter, and comparing the level of regeneration to the reference marsh. The area will
be evaluated after one full growing season in September of 2000 to determine if replanting with
black needle rush will be necessary. If replanting is deemed necessary, NCDOT will prepare a
planting plan and submit it to the USACE and the NCDCM for approval. All efforts will be
made to utilize a local seed source if plantings are required. If there are any areas where
compaction has prevented natural regeneration from occurring, hand labor will be used to scarify
the area to remediate the compaction. Areas that require scarification will be planted with black
needle rush and monitored accordingly.
As required, there will be a zero tolerance for phragmites (Phragmites communis). If the
presence of this species is detected, measures will be taken immediately to eradicate this species
from the site.
Monitoring reports will be submitted by December 31" of each year for a period of five years.
The disturbed area will be considered recovered when aerial vegetative coverage has been
determined to meet or exceed 90% of the coverage found in the reference marsh. If after a
period of three years, it is determined that recovery efforts are not succeeding, the North
Carolina Department of Transportation will consult with the U. S. Army Corps of Engineers and
the North Carolina Division of Coastal Management to discuss necessary remedial action.
State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
Mr. Bill Gilmore, P.E., Manager
Planning & Environmental Branch
N.C. Department of Transportation
PO Box 25201
Raleigh, NC 27611-5201
Dear Mr. Gilmore
11kFA'h';WAA
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
April 28, 2000
Re: Certification Pursuant to Section 401 of the Federal Clean Water Act,
Modification to the improvements to the New Croatan Bridge/Manteo Bypass, TIP R-2551, Original
WQC Project No. 970856,
Dare County
Attached hereto is a modification to Certification No. 3167 issued to the North Carolina Department of
Transportation on this date April 28, 2000. The attached modification authorizes: 1) the pile jetting
and cleanup for 19 bridge bents for the referenced project, 2) the extension of the currently permitted
Tee Road by an additional 60 feet, and 3) a temporary floating dock. Access to clean up material
loaded to all jurisdictional wetlands from the jetting process shall be removed from the previously
authorizes work bridge. No mats or file material shall be placed in either the freshwater or saltwater
marshes during the clean up of the jetted material. All other authorized activities shall be conducted as
described in your permit application submitted on April 28, 2000. It should be noted the modification
is applicable only to the additional proposed activities. All the authorized activities and conditions of
certification associated with the original Water Quality Certification and all other corresponding
modifications still apply except where superceded by this certification.
If we can be of further assistance, do not hesitate to contact us.
Attachments:
Modif.cation t^ WQC Ni. 3167
cc: Wilmington District Corps of Engineers
Corps of Engineers Washington Field Office
Deborah Sawyer. DWQ Regional Office
Mr. John Dorney
Cathy Brittingham, Division of Coastal Management
Central Files
,Si el
Steve
i i
lv
Division of Water Quality . 401 Wetlands Unit
1621 Mail Service Center, Raleigh, NC 27699-1621 Telephone [phone] FAX # [phone]
An Equal Opportunity Affirmative Action Emp!oyer - 50% recycled/10% post consumer paper
NORTH CAROLINA 401 WATER QUALITY CERTIFICATION
THIS CERTIFICATION is issued in conformity with the requirements ci Section 401 Public Laws 92-
500 and 95-217 of the United States and subject to the North Carolina Division of Water Quality (DWQ)
Regulations in 15 NCAC 211, Section .0500. This certification authorizes: 1) the pile jetting and cleanup for
19 bridge bents for the referenced project, 2) the extension of the currently permitted Tee Road by an
additional 60 feet, and 3) a temporary floating dock. Access to clean up material loaded to all jurisdictional
wetlands from the jetting process shall be removed from the previously authorizes work bridge. No mats or
file material shall be placed in either the freshwater or saltwater marshes during the clean up of the jetted
material. All other authorized activities shall be conducted as described in your permit application
submitted on April 28, 2000. It should be noted the modification is applicable only to the additional
proposed activities. All the authorized activities and conditions of certification associated with the original
Water Quality Certification and all other corresponding modifications to construct the Manteo Bypass and
Croatan Sound Bridge still apply except where superceded by this certification.
The application provides adequate assurance that the discharge of fill material into the proposed wetlands in
conjunction with the proposed development will not result in a violation of applicable Water Quality
Standards and discharge guidelines. Therefore, the State of North Carolina certifies that this activity will
not violate the applicable portions of Sections 301, 302, 303, 306, 307 of PL 92-500 and PL 95-217 if
conducted in accordance with the application and conditions hereinafter set forth.
This approval is only valid for the purpose and design that you submitted in your application, as described in
the Public Notice. Should your project change, you are required to notify the DWQ and submit a new
application. If the property is sold, the new owner must be given a copy of this Certification and approval
letter, and is thereby responsible for complying with all the conditions. If total wetland fills for this project
(now or in the future exceed one acre, compensatory mitigation may be required as described in 15A NCAC
2H .0506 (h) (6) and (7). For this approval to remain valid, you are required to comply with all the
conditions listed below. In addition, you should obtain all other federal, state or local permits before
proceeding with'your project including (but not limited to) Sediment and Erosion control, Coastal
Stormwater, Non-discharge and Water Supply watershed regulations.
Condition(s) of Certification:
Appropriate sediment and erosion control practices which equal or exceed those outlined in the
most recent version of two manuals. Either the "North Carolina Sediment and Erosion Control
Planning and Design Manual" or the "North Carolina Surface Mining Manual" (available from the
Division of Land Resources in the DEHNR Regional or Central Offices). The control practices
shall be utilized to prevent exceedances of the appropriate turbidity water quality standard (50
NTUs in all fresh water streams and rivers not designated as trout waters; 25 NTUs in all lakes
and reservoirs, and all saltwater classes; and 10 NTUs in trout waters);
2. All sediment and erosion control measures placed in wetlands or waters shall be removed and
the natural grade restored after the Division of Land Resources has released the project;
3. Measures shall be taken to prevent live or fresh concrete from coming into contact with
waters of the state until the concrete has hardened;
4. There shall be no excavation from or waste disposal into jurisdictional wetlands or waters
associated with this permit without appropriate modification of this permit. Should waste or
borrow sites be located in wetlands or stream, compensatory mitigation will be required since it is
a direct impact from road construction activities;
5. No additional compensatory mitigation shall be done in accordance with this modification.
6. All other conditions written into previous Water Quality Certifications for this project still apply.
Violations of any condition herein set forth shall result in revocation of this Certification and may result in
criminal and/or civil penalties. This Certification shall become null and void unless the above conditions
are made conditions of the Federal 404 and/or coastal Area Management Act Permit. This Certification
shall expire upon expiration of the 404 or CAMA permit.
If this Certification is unacceptable to you have the right to an adjudicatory hearing upon written request
within sixty (60) days following receipt of this Certification. This request must be in the form of a written
petition conforming to Chapter 150B of the North Carolina General Statutes and filed with the Office of
Administrative Hearings, P.O. Box 27447, Raleigh, N.C. 27611-7447. If modifications are made to an
original Certification, you have the right to an adjudicatory hearing on the modifications upon written
request within sixty (60) days following receipt of the Certification. Unless such demands are made, this
Certification shall be final and binding.
This the 28th day of April 2000
DIVISION OF WATER QUALITY
Modification to WQC No. 3167
+rrStevens j Lk I
c:\ncdot\R-255 1\wqc\wqc modification 042800.doc
State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
Mr. Bill Gilmore, P.E., Manager
Planning & Environmental Branch
N.C. Department of Transportation
PO Box 25201
Raleigh, NC 27611-5201
Dear Mr. Gilmore
1 • •
A 00% 001M
NC ENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
April 28, 2000
Re: Certification Pursuant to Section 401 of the Federal Clean Water Act,
± Modification to the improvements to the New Croatan Bridge/Manteo Bypass, TIP R-2551, Original
WQC Project No. 970856,
Dare County
Attached hereto is a modification to Certification No. 3167 issued to the North Carolina Department of
Transportation on this date April 28, 2000. The attached modification authorizes: 1) the pile jetting
and cleanup for 19 bridge bents for the referenced project, 2) the extension of the currently permitted
Tee Road by an additional 60 feet, and 3) a temporary floating dock. Access to clean up material
loaded to all jurisdictional wetlands from the jetting process shall be removed from the previously
authorizes work bridge. No mats or file material shall be placed in either the freshwater or saltwater
marshes during the clean up of the jetted material. All other authorized activities shall be conducted as
described in your permit application submitted on April 28, 2000. It should be noted the modification
is applicable only to the additional proposed activities. All the authorized activities and conditions of
certification associated with the original Water Quality Certification and all other corresponding
modifications still apply except where superceded by this certification.
If we can be of further assistance, do not hesitate to contact us.
Attachments:
`Modification to WQC No. 3167
cc: Wilmington District Corps of Engineers
Corps of Engineers Washington Field Office
Deborah Sawyer, DWQ Regional Office
Mr. John Dorney
Cathy Brittingham, Division of Coastal Management
Central Files
,?Si el
I
Steve '
i
Division of Water Quality • 401 Wetlands Unit
1621 Mail Service Center, Raleigh, NC 27699-1621 Telephone [phone] FAX # [phone]
An Equal Opportunity Affirmative Action Employer . 50% recycled/10% post consumer paper
NORTH CAROLINA 401 WATER QUALITY CERTIFICATION
THIS CERTIFICATION is issued in conformity with the requirements of Section 401 Public Laws 92-
500 and 95-217 of the United States and subject to the North Carolina Division of Water Quality (DWQ)
Regulations in 15 NCAC 2H, Section .0500. This certification authorizes: 1) the pile jetting and cleanup for
19 bridge bents for the referenced project, 2) the extension of the currently permitted Tee Road by an
additional 60 feet, and 3) a temporary floating dock. Access to clean up material loaded to all jurisdictional
wetlands from the jetting process shall be removed from the previously authorizes work bridge. No mats or
file material shall be placed in either the freshwater or saltwater marshes during the clean up of the jetted
material. All other authorized activities shall be conducted as described in your permit application
submitted on April 28, 2000. It should be noted the modification is applicable only to the additional
proposed activities. All the authorized activities and conditions of certification associated with the original
Water Quality Certification and all other corresponding modifications to construct the Manteo Bypass and
Croatan Sound Bridge still apply except where superseded by this certification.
The application provides adequate assurance that the discharge of fill material into the proposed wetlands in
conjunction with the proposed development will not result in a violation of applicable Water Quality
Standards and discharge guidelines. Therefore, the State of North Carolina certifies that this activity will
not violate the applicable portions of Sections 301, 302, 303, 306, 307 of PL 92-500 and PL 95-217 if
conducted in accordance with the application and conditions hereinafter set forth.
This approval is only valid for the purpose and design that you submitted in your application, as described in
the Public Notice. Should your project change, you are required to notify the DWQ and submit a new
application. If the property is sold, the new owner must be given a copy of this Certification and approval
letter, and is thereby responsible for complying with all the conditions. If total wetland fills for this project
(now or in the future exceed one acre, compensatory mitigation may be required as described in 15A NCAC
211.0506 (h) (6) and (7). For this approval to remain valid, you are required to comply with all the
conditions listed below. In addition, you should obtain all other federal, state or local permits before
proceeding with'your project including (but not limited to) Sediment and Erosion control, Coastal
Stormwater, Non-discharge and Water Supply watershed regulations.
Condition(s) of Certification:
Appropriate sediment and erosion control practices which equal or exceed those outlined in the
most recent version of two manuals. Either the "North Carolina Sediment and Erosion Control
Planning and Design Manual" or the "North Carolina Surface Mining Manual" (available from the
Division of Land Resources in the DEHNR Regional or Central Offices). The control practices
shall be utilized to prevent exceedances of the appropriate turbidity water quality standard (50
NTUs in all fresh water streams and rivers not designated as trout waters; 25 NTUs in all lakes
and reservoirs, and all saltwater classes; and 10 NTUs in trout waters);
2. All sediment and erosion control measures placed in wetlands or waters shall be removed and
the natural grade restored after the Division of Land Resources has released the project;
3. Measures shall be taken to prevent live or fresh concrete from coming into contact with
waters of the state until the concrete has hardened;
4. There shall be no excavation from or waste disposal into jurisdictional wetlands or waters
associated with this permit without appropriate modification of this permit. Should waste or
borrow sites be located in wetlands or stream. compensatory mitigation will be required since it is
a direct impact from road construction activities;
5. No additional compensatory mitigation shall be done in accordance with this modification.
6. All other conditions written into previous Water Quality Certifications for this project still apply.
Violations of any condition herein set forth shall result in revocation of this Certification and may result in
criminal and/or civil penalties. This Certification shall become null and void unless the above conditions
are made conditions of the Federal 404 and/or coastal Area Management Act Permit. This Certification
shall expire upon expiration of the 404 or CAMA permit.
If this Certification is unacceptable to you have the right to an adjudicatory hearing upon written request
within sixty (60) days following receipt of this Certification. This request must be in the form of a written
petition conforming to Chapter 150B of the North Carolina General Statutes and filed with the Office of
Administrative Hearings, P.O. Box 27447, Raleigh, N.C. 27611-7447. If modifications are made to an
original Certification, you have the right to an adjudicatory hearing on the modifications upon written
request within sixty (60) days following receipt of the Certification. Unless such demands are made, this
Certification shall be final and binding.
This the 28th day of April 2000
DIVISION OF WATER QUALITY
Modification to WQC No. 3167

Stevens
c:\ncdot\R-2551\wqc\wqc modification 042800.doc

APR 1 0 2000
r Scws?
..0 d y, ?2
WETLANDS GftUJ;
LATER (QUALITY SECTIvN
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR.
GOVENOR
April 6, 2000
Michael F. Bell, Regulatory Project Manager
U.S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. BOX 1000
Washington, North Carolina 27889
Dear Mr. Bell:
DAVID McCOY
SECRETARY
SUBJECT: Proposed minor modification to Department of the Army
Permit No. 199502334: Improvements to US 64-264, Including
the construction of a new Croatan Sound bridge, from west of
Manns Harbor to NC 345, south of Manteo, in Dare County;
Federal Aid Project No. NHF-64 (6); State Project No. 8.T051401;
TIP No. R-2551.
As you are aware, the NCDOT has requested that Department of the Army
Permit No. 199502334 be modified to (1) authorize pile jetting and cleanup;
and (2) authorize an extension of the currently permitted Tee road by 60.0
feet; and 3) authorize a temporary floating dock; and 4) authorize mooring
piles and stabilization measures for the temporary load-out trestle; and 5)
authorize a minimal use of jetting to loosen temporary trestle piles for
removal on both the west and east sides.
Modification request 1 is discussed below. Modification requests 2-4 have
not changed since the original request. Due to the successful removal of
piles without utilizing jetting, modification request 5 (authorize a minimal
use of jetting to loosen temporary trestle piles for removal on both the
west and east sides) is no longer necessary and is hereby rescinded.
Please reference the March 14, 2000 letter from the NCDOT requesting
authorization to jet piles conditioned upon the NCDOT providing the USACE
with an approved cleanup plan before jetting operations were initiated.
This letter is a response to the subsequent request from the USACE that a
plan be provided for cleanup before any authorization is granted. Also
please reference the January 28, 2000 letter from the NCDOT detailing cost
P. O. Box 850 Edenton, NC 27932 [phone] FAX: [phone]
estimates for jetting spoil cleanup as well as the original modification
request of November 12, 1999.
The NCDOT proposes to cleanup all spoil material associated with jetting
operations in jurisdictional areas. As noted in the referenced
correspondence, jetting is proposed at 19 bent locations. Of these 19 bents,
9 bents occur within freshwater wetlands and 10 bents occur within coastal
wetlands.
Currently, the NCDOT has two options that are considered feasible: 1)
(Preferred) Remove all material within the coastal marsh with a crane fitted
with a clamshell bucket from the existing work trestle and utilize mats and
lightweight tracked equipment to remove material from the freshwater
wetlands; 2) Extend the temporary trestle all the way to high ground and
remove all material from the trestle via the crane and clamshell bucket.
OPTION ONE (Preferred): Utilize a combination of cleanup from mats
and trestle
The NCDOT proposes to utilize the existing temporary construction trestle as
access to remove all material deposited within coastal marsh. A crane with a
smooth clam bucket will be operated from the trestle. The material will be
picked up with the crane and offloaded into bins on the trestle. The
material will then be transported to high ground for disposal. At no time
will any tracked or wheeled equipment be operated in the coastal marsh. As
described in the referenced January 28, 2000 correspondence, the cost for
utilizing the existing work trestle to cleanup the affected area around 10
bents will be $1,782,721.
All material deposited within the freshwater wetlands will be removed
utilizing a mat road as described in the referenced correspondence from
November 12,1999. As described in the referenced January 28, 2000
correspondence, the cost for utilizing mats to cleanup, monitor, and
mitigate (if necessary) is $206,173. Please note that the NCDOT will, under
no circumstances, use more than one layer of mats. If the soil below the
mats subsides to the point that additional mats need to be stacked on the
initial mat road, the NCDOT will abort the matting cleanup operation. If it is
determined that one layer of mats will not support the removal operation,
the existing work trestle will be extended and all cleanup will be conducted
via the trestle/crane system.
Total cost for combination option is $1,988,894
OPTION TWO: Remove material from both the coastal marsh and
freshwater wetlands from the existing work trestle using a crane and
clamshell bucket.
As described in the referenced January 28, 2000 correspondence, the total
cost for extending the existing temporary work trestle and cleaning up the
entire affected area from the trestle with a crane and clamshell bucket is
$3,382,773.
Cost savings by using the combination option Vs. trestle only= $1,393,878.
The NCDOT hereby requests that the existing permit be modified to
authorize (1) authorize pile jetting and cleanup utilizing a combination of
mats and the temporary work trestle; and (2) authorize an extension of the
currently permitted Tee road by 60.0 feet; and 3) authorize a temporary
floating dock; and 4) authorize mooring piles and stabilization measures for
the temporary load-out. There will be no use of matting or tracked or
wheeled vehicles within any portions of coastal wetlands. Furthermore,
should it be discovered that the ground will not adequately support
matting, all operations in freshwater wetlands using mats will be suspended
and all material will be removed from the trestle.
Thank you for your time and consideration. The Department respectfully
requests that processing of this modification request proceed as soon as
possible. By copy of this letter, the Department also requests that the
Division of Water Quality and the Division of Coastal Management also
modify the 401 Water Quality Certification
and the CAMA Major Development Permit respectively. If you have any
further questions or would like additional information, please don't hesitate
to call.
Sincerely,
D. R. Conner, P. E.
Division Engineer
77 Z
T. Lin Iddick, Jr.
Division Environmental Officer
CC: Mr. John Hennessy, DWQ
Mr. David Cox, WRC
Mr. Tom McCartney, FWS
Mr. Ron Sechler, NMFS
Ms. Sara Winslow, DMF
Mr. Bill Gilmore, P.E., DOT
Mr. Frank Jennings, NCDCM
Mr. R. W. Midgett, P. E.
Mr. R. E. Capehart, P. E.
Mr. Steve DeWitt, P. E.
Mr. Ted Bisterfield, EPA
Ms. Cathy Brittingham, NCDCM
D:\My Documents\R-2551\cleanupproposalsmod.doc
Re: R-2551 Bridge over Croatan Sound
A
Subject: Re: R-2551 Bridge over Croatan Sound
Date: Tue, 11 Apr 2000 14:59:09 -0700
From: John Hennessy <[e-mail]>
To: "T. Lindsey Riddick" <[e-mail]>,
Jean Manuele <[e-mail]>,
Mike Bell <[e-mail]>
CC: Cathy Brittingham <[e-mail]>
The DWQ is comfortable with the proposed preferred option. The alternative would all
for
placement of mats in the freshwater wetlands only, and would require their removal
should
the subside. Moreover, the mats will be removed and the original elevation contours
restored after their removal. However, the proposal failed to include appropriate
permit
drawings. The DOT is requested to submit permit drawings that show the location of
the
freshwater and saltwater wetlands, the already permitted work bridge, and the
location of
the proposed mats in freshwater wetlands. The maps should be of sufficient accuracy
and
detail to allow for their use in finding the impact sites in the field. If you have
any
questions or require additional information, please contact me at 919-733-5694.
Sincerely,
John Hennessy
"T. Lindsey Riddick" wrote:
> Regulatory and Commenting Agency Representatives,
> As most of you know the NCDOT has requested that the existing
> authorizations for this project be modified to allow the
> construction method known as jetting, along with various other
> minor items. The main issue has been the cleanup method employed
> to remove the spoil material after jetting. The USACE has
> requested that the NCDOT submit a cleanup plan. The attached
> document serves as that cleanup plan. Mr. Mike Bell of the USACE
> will be out of the office for three weeks beginning on April 11,
> 2000. If at all possible, please provide any verbal or written
> comments to him by 4110100. His telephone number is (252)
> 975-1616 x26. If you are unable to comment before April 10, 2000,
> plaese send your comments to Ms. Jean Manuel in the USACE Raleigh
> field office. Her telephone number is [phone]. Her
> mailing address is: USACE Raleigh Feild Office, 6508 Falls of
> the Neuse Road, Raleigh, NC 27615. I will be available to answer
> any questions you may have. My office telephone number is (252)
> 482-7977. You may also reach me on my mobile phone @ (252)
> 339-0112. The NCDOT sincerely appreciates all of your efforts.
> Any assistance you may be able to provide in resolving this issue
> quickly will be greatly appreciated.
>
> T. Lindsey Riddick, Jr.
> Division One Environmental Officer
> [phone]
> FAX: [phone]
> ------------------------------------------------------------------------
> Name: cleanupproposalsmod.doc
1 of 2 04/11/2000 2:59 PM
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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR.
GOVENOR
April 6, 2000
Michael F. Bell, Regulatory Project Manager
U.S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. Box 1000
Washington, North Carolina 27889
Dear Mr. Bell:
DAVID McCOY
SECRETARY
SUBJECT: Proposed Minor Modification to Department of the Army Permit No.
199502334: Improvements to US 64-264, Including the construction of a
new Croatan Sound bridge, from west of Manns Harbor to NC 345, south
of Manteo, in Dare County; Federal Aid Project No. NHF-64 (6); State
Project No. 8.T051401; TIP No. R-2551.
As you are aware, the NCDOT has requested that Department of the Army Permit No.
199502334 be modified to (1) authorize pile jetting and cleanup; and (2) authorize an
extension of the currently permitted Tee road by 60.0 feet; and 3) authorize a temporary
floating dock; and 4) authorize mooring piles and stabilization measures for the temporary
load-out trestle; and 5) authorize a minimal use of jetting to loosen temporary trestle piles
for removal on both the west and east sides.
Modification request 1 is discussed below. Modification requests 2-4 have not changed
since the original request. Due to the successful removal of piles without utilizing jetting,
modification request 5 (authorize a minimal use of jetting to loosen temporary trestle piles
for removal on both the west and east sides) is no longer necessary and is hereby
rescinded.
Please reference the March 14, 2000 letter from the NCDOT requesting authorization to
jet piles conditioned upon the NCDOT providing the USACE with an approved cleanup
plan before jetting operations were initiated. This letter is a response to the subsequent
request from the USACE that a plan be provided for cleanup before any authorization is
granted. Also please reference the January 28, 2000 letter from the NCDOT detailing
cost
P. O. Box 850 Edenton, NC 27932 [phone] FAX: [phone]
estimates for jetting spoil cleanup as well as the original modification request of
November 12, 1999.
The NCDOT proposes to cleanup all spoil material associated with jetting operations in
jurisdictional areas. As noted in the referenced correspondence, jetting is proposed at 19
bent locations. Of these 19 bents, 9 bents occur within freshwater wetlands and 10 bents
occur within coastal wetlands.
Currently, the NCDOT has two options that are considered feasible: 1) (Preferred)
Remove all material within the coastal marsh with a crane fitted with a clamshell bucket
from the existing work trestle and utilize mats and lightweight tracked equipment to
remove material from the freshwater wetlands; 2) Extend the temporary trestle all the way
to high ground and remove all material from the trestle via the crane and clamshell
bucket.
OPTION ONE (Preferred): Utilize a combination of cleanup from mats and trestle
The NCDOT proposes to utilize the existing temporary construction trestle as access to
remove all material deposited within coastal marsh. A crane with a smooth clam bucket
will be operated from the trestle. The material will be picked up with the crane and
offloaded into bins on the trestle. The material will then be transported to high ground for
disposal. At no time will any tracked or wheeled equipment be operated in the coastal
marsh. As described in the referenced January 28, 2000 correspondence, the cost for
utilizing the existing work trestle to cleanup the affected area around 10 bents will be
$1,782,721.
All material deposited within the freshwater wetlands will be removed utilizing a mat road
as described in the referenced correspondence from November 12, 1999. As described
in the referenced January 28, 2000 correspondence, the cost for utilizing mats to cleanup,
monitor, and mitigate (if necessary) is $206,173. Please note that the NCDOT will, under
no circumstances, use more than one layer of mats. If the soil below the mats subsides
to the point that additional mats need to be stacked on the initial mat road, the NCDOT
will abort the matting cleanup operation. If it is determined that one layer of mats will not
support the removal operation, the existing work trestle will be extended and all cleanup
will be conducted via the trestle/crane system.
Total cost for combination option is $1,988,894
OPTION TWO: Remove material from both the coastal marsh and freshwater
wetlands from the existing work trestle using a crane and clamshell bucket.
As described in the referenced January 28, 2000 correspondence, the total cost for
extending the existing temporary work trestle and cleaning up the
entire affected area from the trestle with a crane and clamshell bucket is $3,382,773.
Cost savings by using the combination option Vs. trestle only=$1,393,878.
The NCDOT hereby requests that the existing permit be modified to authorize (1)
authorize pile jetting and cleanup utilizing a combination of mats and the temporary work
trestle; and (2) authorize an extension of the currently permitted Tee road by 60.0 feet;
and 3) authorize a temporary floating dock; and 4) authorize mooring piles and
stabilization measures for the temporary load-out. There will be no use of matting or
tracked or wheeled vehicles within any portions of coastal wetlands. Furthermore, should
it be discovered that the ground will not adequately support matting, all operations in
freshwater wetlands using mats will be suspended and all material will be removed from
the trestle.
Thank you for your time and consideration. The Department respectfully requests that
processing of this modification request proceed as soon as possible. By copy of this
letter, the Department also requests that the Division of Water Quality and the Division of
Coastal Management also modify the 401 Water Quality Certification and the CAMA
Major Development Permit respectively. If you have any further questions or would like
additional information, please don't hesitate to call.
Sincerely,
D. R. Conner, P. E.
Division Engineer
T. Lindsey Riddick, Jr.
Division Environmental Officer
cc: Mr. John Hennessy, DWQ
Mr. David Cox, W RC
Mr. Tom McCartney, FWS
Mr. Ron Sechler, NMFS
Ms. Sara Winslow, DMF
Mr. Bill Gilmore, P.E., DOT
Mr. Frank Jennings, NCDCM
Mr. R. W. Midgett, P. E.
Mr. R. E. Capehart, P. E.
Mr. Steve DeWitt, P. E.
Mr. Ted Bisterfield, EPA
Ms. Cathy Brittingham, NCDCM
C:\TEMP\cleanupproposalsmodl.doc
State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor NCDENR
Bill Holman, Secretary
Kerr T. Stevens, Director
January 14, 2000
Mr. Bill Gilmore, P.E., Manager
Planning and Environmental Branch
North Carolina Department of Transportation
P.O. Box 25201
Raleigh, North Carolina, 27611
Dear Mr. Gilmore:
Re: Proposed permit modification for the improvements to US 64-264 including the construction of the
new Croatan Sound Bridge, from west of Manns Harbor to NC 345 south of Manteo in dare County;
Federal Aid Project No. NHF-64(6); State Project No. 8.T051401; TIP No. R-2551; COE Actiion ID
199502334.
The Division of Water Quality has reviewed your submittal for a 401 Water Quality Certification for the
aforementioned project. Review of your application revealed it lacking necessary information required for
making an informed permit decision. The permit application was deficient in the following areas:
• The economic analysis used to determine the cost estimates presented in the permit application needs to
be submitted to the NCDWQ. The permit modification requests permission to employ construction
techniques that both parties previously agreed would not be used. Furthermore, an economic
justification is presented for the selection of the preferred construction techniques. Therefore, it seems
reasonable that a more thorough explanation as to the methods used in developing the costs is needed to
make an informed permitting decision.
Therefore, pursuant to 15A NCAC 2h .0507(a), we will have to place the permit application on hold until
we are supplied the necessary information. Furthermore, until the information is received by the NC
Division of Water Quality, we request (by copy of this letter) that the US Army Corps of Engineers place
the permit application on hold.
Hopefully, we can work together to expedite the processing of your permit application. If you have any
questions or require additional information, please contact John Hennessy at 919-733-5694.
Joh R. Dorney
Wa r Quality Certific do rogram
cc: Deborah Sawyer DWQ Regional Office
Mike Bell, USACE
Central Files
C:\ncdot\R-2551 \correspondence\991265hld.doc
Wetlands/401 Unit 1621 Mail Service Center Raleigh, North Carolina 27699-1621
Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post consumer paper
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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR.
GovENOR
November 12, 1999
Michael F. Bell, P.W.S., Regulatory Project Manager
U. S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. Box 1000
Washington, North Carolina 28779
Dear Mr. Bell:
DAVID McCOY
SECRETARY`
F" SUBJECT: Proposed Minor Modification to Department of the Army Permit
No. 199502334: Improvements to US 64-264, Including the construction of a new Croatan Sound
bridge, from west of Manns Harbor to NC 345, south of Manteo, in Dare County; Federal Aid
Project No. NHF-64 (6); State Project No. 8.T051401; TIP No. R-2551.
The Department of Transportation requests that the existing DOA Permit be modified to (1)
authorize pile jetting and cleanup; and (2) authorize an extension of the currently permitted Tee
road by 60.0 feet; and 3) authorize a temporary floating dock; and 4) authorize mooring piles and
stabilization measures for the temporary load-out trestle; 5) authorize a minimal use of jetting to
loosen temporary trestle piles for removal on both the west and east sides.
Modification #1: Authorize pile jetting and cleanup
The North Carolina Department of Transportation (NCDOT) is currently constructing a new
bridge over the Croatan Sound. As you are aware, the piles are being placed by the construction
method known as jetting. Jetting produces a mixture of sediment and water that is dispersed into
the marsh adjacent to the bridge bents. You will also recall that the NCDOT has attempted to
institute several methods of capturing the material and removing it from the marsh during the
jetting process. This was an attempt at instantaneous cleanup to prevent the sediment from a
prolonged stay within the jurisdictional area. These methods included driving 54" cassions
around each pile to capture the material and then pumping the material to a settling basin. Total
cost for this method for two bridge bents was approximately $1,800,000. Additionally, this
method failed to remove the material satisfactorily.
7.
Attempts at removing the material immediately after deposition failed repeatedly. Subsequently,
the Department elected to contain the material and remove it after the piles were in place. The
jetting sediment on the west side of the bridge was eventually removed using a wooden mat road,
a Caterpillar 307 lightweight excavator and a standard front end loader.
The NCDOT has evaluated several options for dealing with the jetting sediment on the east side.
First, an alternative method of installing the piles was investigated. This foundation redesign
was not found to be feasible due to time and financial constraints. Preliminary estimates indicate
that changing the method of construction would result in a 26-week delay for redesign, retooling,
equipment acquisition, etc. It would also result in an increased cost of approximately
$10,000,000. Therefore, this option was not considered feasible.
Second, the NCDOT evaluated using the temporary work trestle and a crane to clean up and
remove the sediment. This method is described as follows:
-Clean up approximately 200 CY at each bent, 19 bents involved.
-Sediment removal with a crane with clamshell bucket
-Train will haul material in "dumpsters" or in modified rail cars to a barge at waters edge.
-Material will be placed on the barge by a barge-mounted crane.
-Material barge will be pushed by tugboat to the Load Out Trestle on the Mann's Harbor side.
-Material will be offloaded at the Load Out Trestle by the straddle crane and placed into awaiting
trucks for disposal.
-Straddle crane will load empty containers back onto material barge.
-Barge will be pushed back to the Roanoke Island side for the next bent(s) cleanup.
-Bent clean up estimated at 2 days per bent, 38 days, another 2 to 12 days for equipment
acquisition and fabrication, (i.e. clamshell bucket, dumpsters, rail cars, etc)
The assignment of dollar costs to the clean up could be in the range of $7,000 to more than
$10,000 per day.
There is the possibility that the rail and crane trestle system could be extended to non-
jurisdictional areas (i.e. near the end bent) much later in the course of construction of the bents
in the affected wetlands. The material could be transferred to the end bent as opposed to a barge
and pushed across the sound. The cost of any extension would be borne by the DOT; the
contractor's original submittal/plan did not extend the trestle to the end bent. The contractor's
intention all along has been to 'service' construction of the bridge in these east side wetlands by
the trestle whereby supplies are brought in from awaiting barges and the like. The construction
of the trestle is designed to take place in a staged sequence. In this sequence each section of
trestle is completed only as needed. This process will start in at the farthest bent from shore
(working from barges) and work towards land. Therefore, it would take several months to reach
the point where it would be feasible to extend the trestle to non jurisdictional area. It is
estimated that direct cost (labor, materials, equipment) associated with trestle extension would
be approximately $50,000 to extend another 160 feet. This would also trigger additional indirect
costs of approximately $100,000 associated with manipulating the contractors scheduling and
labor force allocations.
DIRECT IMPACTS
Trestle Clean Up $500,000 to $1,000,000.
INDIRECT IMPACTS
Trestle Clean Up $2,000,000 to $3,000,000
Indirect impacts are very difficult measure at this time. It is estimated that 40 to 50 days will be
required for the clean up. This timeframe takes resources away from bridge construction. These
resources would not be earning the contractor the anticipated revenues within his earnings
schedule. This timeframe has the high potential to disrupt operations following pile installation.
Pile cap construction could be idled/delayed, thereby effecting girder erection and deck
construction. These impacts can include idled equipment and manpower and increased storage
and transportation costs for soon to be fabricated items such as girders and bearings. The idled
condition may force the contractor to take measures not originally planned for to maintain or
recover his construction schedule. The vernacular for these impacts are disruption of works, loss
of productivity, accelerative measures, extended overhead, loss of profit and loss of interest on
earnings.
TOTAL IMPACT for Trestle Cleanup: Direct + Indirect $2,500,000 to $4,000,000
The Department feels that this method is unacceptable; at even the most conservative estimate of
$2,500,000 the extended delays and extravagant costs make this alternative non-feasible.
Therefore, the NCDOT proposes to contain the sediment using silt fence and hay bales as was
allowed on the west side. The material will then be removed by a lightweight Caterpillar 307
excavator and a low ground pressure tracked loader. These lightweight pieces of equipment will
be transported to the sediment containment area via wooden mats placed on the ground. The
wooden mats will be ten feet wide. The total length of matting will be 1,903.0 feet from bridge
bent 249 to the end bent (high ground) with an additional 20.0 feet of perpendicular matting per
bent to access the containment area. Cleanup methodology will consist of utilizing the
lightweight excavator to recover the material and place it in a small pile within the containment
area. The low ground pressure tracked loader will then transport the material across the mat road
to high ground to be disposed of. Total area involved in sediment containment and cleanup will
be 2.325 acres.
The amount of pressure exerted on the mat road is expected to be significantly less than was
exerted on the mat road during sediment clean up on the west side. This is due to the utilization
of a low ground pressure tracked loader as opposed to a standard front end loader. Therefore, it
is reasonable to conclude that there will be less settling associated with the use of matting. The
total area affected by matting will be 0.524 acres. The NCDOT is committed to a full
monitoring of the affected area to insure that the marsh recovers. Monitoring will be conducted
in accordance with attached monitoring plan. Additionally, the NCDOT has acquired a property
that is currently being developed as a mitigation site. The site is near Stumpy Point, NC and will
involve the restoration of a black needle rush (Juncus roemerianus) salt marsh community. The
NCDOT fully expects the affected matting area to recover. However, the development of the
Stumpy Point mitigation site is intended to serve as a "safety net" should monitoring of the
cleanup area reveal that the recovery is not successful.
Modification # 2• Authorize the extension 'of the currently permitted Tee road by 60.0 feet
If you recall the Tee road is a section of temporary work trestle perpendicular to the bridge
alignment which allows the contractor to get as close as possible to the bent for pile installation.
The current design for the Tee road is a 60.0-foot long section of Tee road extending
perpendicularly from the temporary work trestle to the bridge bents. The trestle was proposed
the minimum practical safe distance from the bridge with the 60.0 foot Tee road extending out to
the bridge to allow a crane to stretch from the Tee road to the bridge bent. However, after a test
pile program conducted at the beginning of project construction, it was found that the 60.0 foot
Tee road was not sufficient for all of the bent construction activities on the east side.
The test pile program revealed that longer, heavier piles would be needed on the east side than
were utilized on the west side. Pile lengths were changed from an average of 35 meters (115.0
feet) to an average of 42 (138.0 feet) meters in length. The distance that has to be stretched by
the crane, coupled with the heavier and larger load, produces a situation that may cause
equipment failures and compromise personal safety of workers. Therefore, the Department
requests that the authorization be granted to extend the Tee road an additional 60.0 feet. The
proposed extension will require four additional 24" pipe piles. Please note that these piles are
temporary at each location. They will be in place only as long as pile driving activities are
taking place at that bent. The Tee road will then be dismantled and moved to the next bent.
Please see the attached construction drawings for reference.
Modification #3: Authorize a temporary floating dock
The contractor has requested permission to build a temporary floating dock at load-out trestle
bent number four. The temporary floating dock will be used to dock construction vessels as well
as on and off load construction equipment and workers. The dock will be approximately 6.096
meters x 6.096 meters (20.0 feet x 20.0 feet). This will require the installation of six 0.304-meter
(12.0-inch) steel cylinder piles. Please see the attached construction drawings for reference.
Modification #4• Authorize mooring piles and temporary trestle stabilization measures
The contractor has requested permission to construct four 0.919-meter (36.0-inch) steel mooring
piles at bent thirteen of the load-out trestle. The mooring piles will be used for construction
barges. The barges will tie to the mooring piles while loading or unloading construction
equipment and supplies. This will result in an increased demand and stress on the temporary
trestle. Therefore, we are also requesting authorization to install H-beams for stabilization at
load-out trestle bents 6, 8, 10, 11, 12, and 13. Additionally, two 0.6096-meter (24.0-inch) steel
cylinder piles will be installed at load-out trestle bent number 10. Designs for the stabilization is
included in the construction drawings.
Modification #5: Authorize minimum use of jetting to loosen temporary trestle piles
The original plan for the utilization of this trestle called for the temporary support piles to be
vibrated out and for the trestle to be moved to the east side of the Croatan Sound. However,
recent attempts to remove the temporary piles by vibration have been unsuccessful.
The NCDOT has determined that the piles can be loosened and removed with a minimal use of
"jetting". A very minor amount of material may surface from the pile loosening. Any material
produced by this operation will be raked into the void left by the removed piling. If there is not
enough material to fill the void, the hole will be filled to the elevation of the adjacent ground
with clean sand. Per our telephone conversation of September 14, 1999, the NCDOT will utilize
the above described technique to remove one piling. After removal, the USACE and the
NCDCM will be consulted on site to determine if this method of piling removal is satisfactory.
Your consideration is requested in processing this proposal as a "minor" modification. An
expedited approval is essential to meeting critical project scheduling. Please call me if I can
provide any additional information.
Sincerely,
D. R. Conner, P. E.
Division Enginner
T. Linds ddick, Jr.
Division Environmental Officer-Division One
CC: Mr. R. E. Capehart, P. E.
Mr. R. W. Midgett, P. E.
Mr. Frank Jennings, NCDCM
Mr. David Cox, NCWRC
Ms. Sarah Winslow, NCDMF
Mr. John Hennessy, NCDWQ
Mr. Ron Sechler, NMF
Mr. Doug Huggett, NCDCM
Mr. Randy K. Wise, P. E.
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Monitoring Plan for the recovery of the disturbed marsh area adjacent to the new
Croatan Sound Bridge
The plan consists of monitoring the disturbed site to determine the success of vegetative recovery
occurring within it. The existing undisturbed marsh, dominated by black needle rush (Juncus
roemerianus), adjacent to the disturbed site will be evaluated in January, 2000, and will be used
as a reference marsh to determine the degree of recovery. Three plots measuring 1 meter by 1
meter will be selected randomly and the percent aerial vegetative coverage will be evaluated and
used as a baseline reference.
The disturbed area will be allowed to recover naturally from existing plant material and seed
source present. Vegetative monitoring will be conducted annually beginning in January of 2000.
The monitoring will consist of randomly selecting 12 plots in the disturbed area, measuring 1
meter by 1 meter, and comparing the level of regeneration to the reference marsh. The area will
be evaluated after one full growing season in September of 2000 to determine if replanting with
black needle rush will be necessary. If replanting is deemed necessary, NCDOT will prepare a
planting plan and submit it to the USACE and the NCDCM for approval. All efforts will be
made to utilize a local seed source if plantings are required. If there are any areas where
compaction has prevented natural regeneration from occurring, hand labor will be used to scarify
the area to remediate the compaction. Areas that require scarification will be planted with black
needle rush and monitored accordingly.
As required, there will be a zero tolerance for phragmites (Phragmites communis). If the
presence of this species is detected, measures will be taken immediately to eradicate this species
from the site.
Monitoring reports will be submitted by December 31St of each year for a period of five years.
The disturbed area will be considered recovered when aerial vegetative coverage has been
determined to meet or exceed 90% of the coverage found in the reference marsh. If after a
period of three years, it is determined that recovery efforts are not succeeding, the North
Carolina Department of Transportation will consult with the U. S. Army Corps of Engineers and
the North Carolina Division of Coastal Management to discuss necessary remedial action.

t
ANNUAL REPORT FOR 2001
Manteo Bypass Bridge Mitigation Site
Dare County
Project No. 8.T051403
TIP No. R-2551 A
Prepared By:
Natural Systems Unit & Roadside Environmental Unit
North Carolina Department of Transportation
December 2001
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 VEGETATION 4
2.1 Success Criteria 4
2.2 Description of Species 4
2.3 Results of Vegetation Monitoring 5
2.4 Conclusions 5
3.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS 6
FIGURES
FIGURE 1 - SITE LOCATION MAP
APPENDICES
3
APPENDIX A -ORIGINAL MONITORING PLAN 7
APPENDIX B - SITE PHOTOS 10
ii
SUMMARY
The following report summarizes the monitoring activities that have occurred in the past
year at the Manteo Bypass Bridge Restoration Site. The purpose of the site is to
restore a brackish marsh system that was impacted in relation to the Manteo Bypass
Bridge construction (permit violation). The site was restored in August and September
1999. Monitoring activities for 2001 include the second year of vegetation monitoring
for the site.
The mitigation encompasses approximately 0.128 acres total. The site consists of
brackish marsh restoration. The restoration effort involves removing spoil deposited by
the jetting of piles and monitoring the spoil removal area to ensure that natural
regeneration of Juncus roemerianus (blackneedle rush). No hydrologic monitoring is
required for this project; however, vegetation monitoring is required for five years.
Due to the lack of rapidly recovering/regenerating blackneedle rush, the Department
planted the entire restoration area in May 2001 in an effort to "jump-start" the
vegetation. In August of 2001, the vegetative cover did not meet the success criteria,
but is on track for the first year of planting.
1.0 INTRODUCTION: MANTEO BYPASS BRIDGE MITIGATION SITE
1.1 Project Description
The Manteo Bypass Bridge Restoration Site is located immediately adjacent to the
western terminus of the new bridge over the Croatan Sound associated with the Manteo
Bypass (TIP R-2551A), as is shown in figure 1. The site consists of approximately
0.128 acres and provides for the following types of mitigation:
Brackish Marsh Restoration
1.2 Purpose
The purpose of this report is to detail the vegetation monitoring in 2001 at the Manteo
Bypass Bridge Restoration Site. No hydrologic monitoring is required for this particular
site.
1.3 Project History
October 2000 Vegetation Monitoring (1 yr.)
May 2001 Site planted
August 2001 Vegetation Monitoring (1 yr. after replant)
2
gS
i
33
3
1

f
Figure 1: Manteo Bypass Bridge Mitigation Site
3
2.0 VEGETATION: MANTEO BYPASS BRIDGE
2.1 Success Criteria
The success criteria set forth by the permit violation is outlined in Appendix A.
However, it is the request of the Department to revise the success criteria for this site to
the current marsh mitigation criteria that has evolved in coordination with the US Army
Corps of Engineers and the National Marine Fisheries Service. The new success
criteria is reflected in the following description
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 to the final count of plots. The vegetation
component of the wetland site will be deemed successful if the following criteria are
met.
1. 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.
Due to the bridge interference with the GPS system, we are unable to GPS to computer
generated random plots; therefore, visual monitoring will be utilized for the monitoring of
this 0.128 acre site. Success Criteria will remain 75% vegetative cover of wetland
herbaceous species, not including any invasive species in the fifth year and 70% of the
site shall contain the target (planted) species.
Fifteen, one meter square random plots were evaluated for this monitoring period.
2.2 Description of Species
Juncus roemerianus, Blackneedle Rush, is the primary target marsh grass specie that
is to be present in the Wetland Restoration Area.
2.3 Results of Vegetation Monitoring (1 Year)

_

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3 5.0 ? ?
4 Open water
5 1.0 ? ?
6 5.0 ? ? Juncus s p.
7 5.0 ? ? Juncus s p.
8 1.0 ? ?
9 4.0 ? ? Juncus s p.
10 2.0 ? ?
11 1.0 ? ? Juncus s p.
12 Open water
13 2.0 ? ? Juncus s p.
14 4.0 ? ? Juncus s p.
15 2.0 ? ?

Frequency Percenta a of Plots with 100% 100%
Desired Species)
Sum Scale Value 36
Total Number of Plots 13
Ve etative Cover Scale Value) 1 2.8
2.4 Conclusions
Percent Frequency of Target Species (Black Needle Rush) 100%
Frequency of 70% required.
Vegetative Cover Scale Value 2.8
Required Scale Value after 5 years 5.0
This marsh grass site is approximately 0.128 acres. The frequency requirement meets
requirements for this year. The vegetative cover did not meet the requirement but is on
track for the first year of planting.
6
3.0 OVERALL CONCLUSIONS/RECOMENDATIONS
Based on the vegetation data provided in this report, the Department proposes to
continue vegetation monitoring for this site.
7
APPENDIX A
ORIGINAL MONITORING PLAN
SUBMITTED TO USACE
?d y, a o„
?e "..nm• l2C
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR. P.O. BOX 25201, RALEIGH, N.C. 27611-5201 DAVID MCCOY
GOVERNOR SECRETARY
August 11, 1999
U. S. Army Corps of Engineers
Washington Regulatory Field Office
P. O. Box 1000
Washington, NC, 27889-1000
ATTENTION: Michael F. Bell, PWS
Regulatory Project Manager
SUBJECT: Monitoring plan for the disturbed area adjacent to the new bridge
over the Croatan Sound associated with TIP Project R-2551.
Dear Sir:
Please find attached the proposed monitoring plan for the recovery of the disturbed black
needle rush marsh adjacent to the new bridge over the Croatan Sound. If you have any
questions please don't hesitate to call me at [phone].
Sincerely,
Lindsey Riddick
Division Environmental Officer-Division One
CC: D. R. Conner, P. E.
Randy Midgett, P. E.
Randy K. Wise, P. E.
Frank Jennings, DCM
9
Monitoring Plan for the recovery of the disturbed marsh area adjacent to the
new Croatan Sound Bridge
The plan consists of monitoring the disturbed site to determine the success of vegetative
recovery occurring within it. The existing undisturbed marsh, dominated by black needle
rush (Juncus roemerianus), adjacent to the disturbed site will be evaluated in September,
1999, and will be used as a reference marsh to determine the degree of recovery. Three
plots measuring 1 meter by 1 meter will be selected randomly and the percent aerial
vegetative coverage will be evaluated and used as a baseline reference.
The disturbed area will be allowed to recover naturally from existing plant material and
seed source present. Vegetative monitoring will be conducted annually beginning in
September of 1999. The monitoring will consist of randomly selecting 12 plots in the
disturbed area, measuring 1 meter by 1 meter, and comparing the level of regeneration to
the reference marsh. The area will be evaluated after one full growing season in
September of 2000 to determine if replanting with black needle rush will be necessary. If
replanting is deemed necessary, NCDOT will prepare a planting plan and submit it to the
USACE and the NCDCM for approval. All efforts will be made to utilize a local seed
source if plantings are required. If there are any areas where compaction has prevented
natural regeneration from occurring, hand labor will be used to scarify the area to
remediate the compaction. Areas that require scarification will be planted with black
needle rush and monitored accordingly.
As required, there will be a zero tolerance for phragmites (Phragmites communis). If the
presence of this species is detected, measures will be taken immediately to eradicate this
species from the site.
Monitoring reports will be submitted by December 31St of each year for a period of five
years. The disturbed area will be considered recovered when aerial vegetative coverage
has been determined to meet or exceed 90% of the coverage found in the reference
marsh. If after a period of three years, it is determined that recovery efforts are not
succeeding, the North Carolina Department of Transportation will consult with the U. S.
Army Corps of Engineers and the North Carolina Division of Coastal Management to
discuss necessary remedial action.
10
APPENDIX B
SITE PHOTOS & PHOTO LOCATION MAP
Manteo Bypass Bridge
2000
Photo 1
Photo 3
Photo 2
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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR. DAVID McCOY
GovENOR SECRETARY
July 28, 1999
North Carolina Department of Environment AUG - 3 Po'm
And Natural Resources
Division of Coastal Management WETLY i?DS GROUP
1367 U. S. 17 South WATER QUALITY SECTION!
Elizabeth City, NC 27909
Attention: Mr. Frank Jennings, Coastal Management Field Representative
Subject: Proposed Refinement to CAMA Major Development Permit No 7-98:
Improvements to US 64-264, Including the construction of a new Croatan Sound
bridge, from west of Manns Harbor to NC 345, south of Manteo, in Dare County;
Federal Aid Project No. NBF-64 (6); State Project No. 8.T051401; TIP No. R-
2551.
The North Carolina Department of Transportation (NCDOT), in response to the request
for Right-of-Way on property belonging to the Alligator River National Wildlife Refuge, has
been asked to investigate increasing the diameter of the proposed crosspipes at two locations. In
a letter addressed to the NCDOT Right-of-Way Branch, the U. S. Fish and Wildlife Service
asked the NCDCIT to increase the diameter of the pipes from 36-inch (1000 mm) to 72-inch
(1800) to allow for better passage of aquatic fauna. The pipes will also be countersunk 6.0
inches to allow for better passage of aquatic fauna. The proposed pipes are located near Stations
13+00 and 15+00. A copy of the letter from the U. S. Fish and Wildlife Service is attached.
In accordance with the request from the FWS, the NCDOT has changed the proposed pipe
crossings from 2 @ 36-inch (1000 mm) to 1 @ 72-inch (1800 mm). Please find attached a copy
of the revised permit drawings detailing the proposed changes. Impact quantities remain
unchanged from the original plans. Your consideration is requested in processing this proposal
P. O. Box 850, Edenton, NC 27932 [phone] FAX: [phone]
Page 2
July 28, 1999
Frank Jennings
as a refinement of the referenced permit. If you have any questions or would like additional
information, please don't hesitate to call me.
Thank you for your time and consideration.
Sincerely,
D. R. Conner, P. E.
Division Engineer-Division One
T. Lindsey Riddick
Division Environmental Officer-Division One
Enclosures
CC: Michael F. Bell, PWS, USACE
David R. Cox, NCWRC
Mike Bryant, USFWS
John Hennessy, NCDWQ
Sara Winslow, NCDMF
Ron Sechler, NMFS
COPY
United States Department of the Interior
FISH AND WILDLIFE SERVICE
Alligator River National Wildlife Refuge
P. O. Box 1969
Manteo, NC 27954
Ms. Betty C. Yancey
Senior Right of Way Agent
N. C. Department of Transportation
P. 0. Box 25201
Raleigh, NC 27611-5201
SUBJECT: Right-of-Way Request for U. S. 64/264, TIP Project R-2551, State Project
6.059005T, Dare County, Federal Land Transfer in the Alligator River
National Wildlife Refuge
Dear Ms. Yancey:
This letter is to advise you that we received the requested environmental
documentation and have been preparing a Compatibility Determination for the right-of-
way easement package for our Regional Office. During the course of our review, we
have identified some areas where there is a need for additional information or
clarification. Please consider the following:
The project Environmental Assessment (EA) and Finding of No Significant
Impact (FONSI), both dated August 12, 1997 state that the proposed
right-of-way is 80 feet. This appears to be the basis for impact
assessment and mitigation development. The EA states that the existing
right-of-way is approximately 60 feet, but it is not clear if this includes the
adjacent canal or not. Preliminary project plans, dated May 15, 1998,
show a typical cross section right-of-way of 120 feet for the new roadway
and this does not appear to include the canal. Was this matter addressed
in an addendum to the EA or FONSI? If not, we need to know the
following:
a. Accurate and detailed information on right-of-way width from the
beginning of the project from Station 8+89 through Station 32+00. Right-
of-way width should be minimized to only that width necessary for
maintaining the road after construction.
b. Information regarding the fate of the old right-of-way. Will this right-
of-way be abandoned and transferred to the U. S. Fish & Wildlife Service
(USFWS)?
c. We understand that the old pavement will be removed in those areas
where relocation occurs. Will the old road bed be returned to wetland
elevation and wetland plant communities restored in these areas? If so,
how does this fit into the Mitigation Plan Mashoes Road Mitigation Site
document?
2. What will be the fate of the two parcels of private land, shown on the May
18, 1998 drawings as the M. L. Daniels Oil Company Property (Sheet 4),
after being transected by the new road alignment at the intersection of US
64 and US 264? Has this land been acquired or will it be acquired in fee
title by the N. C. Department of Transportation for eventual transfer to the
USFWS? Will this property be available for mitigation?
3. What is the most up-to-date cross sectional view of the road? Will there
be a center line divider or other type of barrier to prevent vehicles moving
in opposite directions from colliding? If so, what are the specifications for
these barriers?
4. What is the basic construction technique proposed for this project where it
crosses refuge property?
5. Will "mucking out' the road bed and backfilling be required? If so, where
will the muck be stockpiled or disposed? What is the source for borrow
material to be used for backfill?
6. In areas shown as temporary easement for construction, please provide
detailed informaticn regarding the reed for fill in these areas. Given the
nature of project area soils and, if temporary fill is proposed in these
areas, subsidence is likely as result of the weight of fill and equipment.
Upon removal of temporary fill, how will the subsidence problem and
habitat restoration be dealt with?
7. Where will construction equipment storage areas and staging areas be
located? Should we expect future requests for additional encroachment
onto refuge lands for these purposes?
8. There is some question with regards to use of the highway easement by
utility interests. Nell your agency accommodate and/or facilitate utility
company needs?
9. On Sheet 5 of the Preliminary Plans dated May 18, 1998, use of two 1000
mm corrugated aluminum pipes at two locations is shown. Would your
agency be receptive to increasing the diameter of these pipes to about
1800 mm or larger? Increasing the size would allow better passage by
fish and other aquatic fauna.
The information we are requesting is necessary for us to continue our Compatibility
Determination and subsequent referral to the Regional Office. Please provided this
information as soon as possible. Some of the requested information could possibly be
resolved with an onsite meeting. In order to expedite this process, we would be most
willing to meet with appropriate NCDOT staff. We look forward to hearing from you.
Sincerely,
Mike Bryant
Refuge Manager
cc: Ms. Jackie Compton, USFWS
Mr. John Hefner, USFWS
Mr. Randy Turner, NCDOT
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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT HL
GOVENOR
July 27, 1999
Michael F. Bell, P.W.S., Regulatory Project Manager
U. S. Army Corps of Engineers
Washington Regulatory Field Office
P.O. Box 1000
Washington, North Carolina 28779
Dear Mr. Bell:
DAVID McCOY
SECRETARY
7
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HU ?IUG-3
SUBJECT: Proposed Minor Modification to Department of the Army Permit
No. 199502334: Improvements to US 64-264, Including the construction of a new
Croatan Sound bridge, from west of Manns Harbor to NC 345, south of Manteo,
in Dare County; Federal Aid Project No. NBF-64 (6); State Project No.
8.T051401; TIP No. R-2551.
The North Carolina Department of Transportation (NCDOT) has been asked by the U. S.
Fish and Wildlife Service (FWS) to investigate increasing the diameter of the proposed
crosspipes at two locations. In a letter addressed to the NCDOT Right-of-Way Branch, the
Alligator River National Wildlife Refuge (ARNWR) manager asked NCDOT to consider
increasing the diameter of the pipes from 36-inch (1000 mm) to 72-inch (1800) to allow for
better passage of aquatic fauna. The proposed pipes are located near Stations 13+00 and 15+00.
A copy of the letter from the U. S. Fish and Wildlife Service is attached.
In accordance with the request from the FWS, the NCDOT has. changed the proposed pipe
crossings from 2 @ 36-inch (1000 mm) to 1 @ 72-inch (1800 mm). The pipes will also be
countersunk 6.0 inches to allow for better passage of aquatic fauna. Please find attached a copy
of the revised permit drawings detailing the proposed changes. Impact quantities remain
unchanged from the original plans. Your consideration is requested in processing this proposal
P. O. Box 850, Edenton, NC 27932 [phone] FAX: [phone]
Page 2
July 27, 1999
Mike Bell
as a modification of the referenced permit. If you have any questions or would like additional
information, please don't hesitate to call me.
Thank you for your time and consideration.
Sincerely,
D. R. Conner, P. E.
Division Engineer-Division One
T. Lindse ddick
Division Environmental Officer-Division One
Enclosures
Cc: David R. Cox, NCWRC
Tom McCartney, USFWS
John Hennessey, NCDWQ
Sara Winslow, NCDMF
Charles Jones, NCDCM
Ron Sechler, NMFS
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COPY
United States Department of the Interior
FISH AND WILDLIFE SERVICE
Alligator River National Wildlife Refuge
P. 0. Box 1969
Manteo, NC 27954
Ms. Betty C. Yancey
Senior Right of Way Agent
N. C. Department of Transportation
P. 0. Box 25201
Raleigh, NC 27611-5201
SUBJECT: Right-of-Way Request for U. S. 641264, TIP Project R-2551, State Project
6.059005T, Dare County, Federal Land Transfer in the Alligator River
National Wildlife Refuge
Dear Ms. Yancey:
This letter is to advise you that we received the requested environmental
documentation and have been preparing a Compatibility Determination for the right-of-
way easement package for our Regional Office. During the course of our review, we
have identified some areas where there is a need for additional information or
clarification. Please consider the following:
The project Environmental Assessment (EA) and Finding of No Significant
Impact (FONSI), both dated August 12, 1997 state that the proposed
right-of-way is 80 feet. This appears to be the basis for impact
assessment and mitigation development. The EA states that the existing
right-of-way is approximately 60 feet, but it is not clear if this includes the
adjacent canal or not. Preliminary project plans, dated May 15, 1998,
show a typical cross section right-of-way of 120 feet for the new roadway
and this does not appear to include the canal. Was this matter addressed
in an addendum to the EA or FONSI? If not, we need to know the
following:
a. Accurate and detailed information on right-of-way width from the
beginning of the project from Station 8+89 through Station 32+00. Right-
of-way width should be minimized to only that width necessary for
maintaining the road after construction.
b. Information regarding the fate of the old right-of-way. Will this right-
of-way be abandoned and transferred to the U. S. Fish & Wildlife Service
(USFWS)?
c. We understand that the old pavement will be removed in those areas
where relocation occurs. Will the old road bed be returned to wetland
elevation and wetland plant communities restored in these areas? If so,
how does this fit into the Mitigation Plan Mashoes Road Mitigation Site
document?
2. What will be the fate of the two parcels of private land, shown on the May
18, 1998 drawings as the M. L. Daniels Oil Company Property (Sheet 4),
after being transected by the new road alignment at the intersection of US
64 and US 264? Has this land been acquired or will it be acquired in fee
title by the N. C. Department of Transportation for eventual transfer to the
USFWS? Will this property be available for mitigation?
3. What is the most up-to-date cross sectional view of the road? Will there
be a center line divider or other type of barrier to prevent vehicles moving
in opposite directions from colliding? If so, what are the specifications for
these barriers?
4. What is the basic construction technique proposed for this project where it
crosses refuge property?
5. Will "mucking out" the road bed and backfilling be required? If so, where
will the muck be stockpiled or disposed? What is the source for borrow
material to be used for back-fill?
6. In areas shown as temporary easement for construction, please provide
detailed information regarding the need for fill in these areas. Given the
nature of project area soils and, if temporary fill is proposed in these
areas, subsidence is likely as result of the weight of fill and equipment.
Upon removal of temporary fill, how will the subsidence problem and
habitat restoration he dealt with?
7. Where will construction equipment storage areas and staging areas be
located? Should we expect future requests for additional encroachment
onto refuge lands fcr these purposes?
8. There is some question with regards to use of the highway easement by
utility interests. Will your agency accommodate and/or facilitate utility
company needs?
9. On Sheet 5 of the Preliminary Plans dated May 18, 1998, use of two 1000
mm corrugated aluminum pipes at two locations is shown. Would your
r ..
agency be receptive to increasing the diameter of these pipes to about
1800 mm or larger? Increasing the size would allow better passage by
fish and other aquatic fauna.
The information we are requesting is necessary for us to continue our Compatibility
Determination and subsequent referral to the Regional Office. Please provided this
information as soon as possible. Some of the requested information could possibly be
resolved with an onsite meeting. In order to expedite this process, we would be most
willing to meet with appropriate NCDOT stag. We lock forward to hearing from you.
Sincerely,
Mike Bryant
Refuge Manager
cc: Ms. Jackie Compton, USFWS
Mr. John Hefner, USFWS
Mr. Randy Turner, NCDOT

DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
P.O. BOX 1890
WILMINGTON, NORTH CAROLINA 28402-1890
IN REPLY REFER TO
Regulatory Division
Action ID No. 199502334
William D. Gilmore, P.E., Manager
Project Development and
Environmental Analysis Branch
June 10, 1999
North Carolina Department of Transportation
Division of Highways
Post Office Box 25201
Raleigh, North Carolina 27611-5201
Dear Mr. Gilmore:

This correspondence confirms that on May 17, 1999, I conducted an inspection of the
Mashoes Road Mitigation Site located approximately 1 mile north of Manns Harbor in Dare
County, North Carolina. This site is being utilized by the North Carolina Department of
Transportation (NCDOT) as compensatory mitigation for the authorized filling of jurisdictional
wetlands for the purpose of widening approximately 10 miles of U.S. 64/264, including a new
bridge over the Croatan Sound, in Dare County, North Carolina (TIP No. R-2551, Federal Aid
Project No. NHF-64(6), State Project No. 8.T051401). Mr. Randall Turner of your staff was
in attendance at this inspection.
As discussed at this meeting, several items were noted that may cause the project to fail.
We are very concerned that the trees planted on the western side of Mashoes Road are planted
too high in the soil profile. It appears that many of the seedlings have exposed roots and almost
all trees have exposed root collars. We are also concerned about excess stockpiled sand as well
as oil drums and other construction debris that were found within the mitigation site on the
eastern side of Mashoes Road. Additionally, barriers placed to preclude public access have
blown down and are not adequate to stop dumping and other potential human impacts.

Several solutions to these matters were discussed onsite and later by telephone with
Mr. Turner. Within the tree planting area, on the west side of Mashoes Road, organic mulch
could be placed around the exposed trees to insulate them from the desiccating effects of sun
-2-
and wind. However, seedling mortality is expected and remedial action will be required if
success criteria are not met. The oil drums, construction debris and excess sand material
should be removed from the mitigation site for appropriate high ground disposal. Additionally,
permanent measures should be taken to prevent public access to the mitigation site.
I request that you develop a remediation plan to address these problems that commonly effect
the success of mitigation projects. This plan should be submitted within two weeks of your
receipt of this correspondence. I will review the plan and coordinate with your staff regarding
appropriate implementation.
Thank you for your time and cooperation. If you have any questions, please contact me at the
Washington Regulatory Field Office, telephone [phone], extension 26.
Sincerely,
Michael F. Bell. P.W.S.
Regulatory Project Manager
Copies Furnished:
Mr. Randall Turner
Division 1 Environmental Officer
Planning and Environmental Branch
Post Office Box 850
Edenton, North Carolina 27932
Mr. Doug Huggett
Division of Coastal Management
North Carolina Department of Environment
and Natural Resources
Post Office Box 27687
Raleigh, North Carolina 27611

t
-3-
Mr. John Hefner, Field Supervisor
U.S. Fish and Wildlife Service
Fish and Wildlife Enhancement
Post Office Box 33726
Raleigh, North Carolina 27636-3726
Mr. Larry Hardy
National Marine Fisheries Service
Pivers Island
Beaufort, North Carolina 28516
Mr. William L. Cox, Chief
Wetlands Section - Region IV
Water Management Division
U.S. Environmental Protection Agency
61 Forsyth Street, SW
Atlanta, Georgia 30303
Mr. John Hennessy
Dom' 'ision of Water Quality
,-/North Carolina Department of Environment
and Natural Resources
Environmental Services Branch
4401 Reedy Creek Road
Raleigh, North Carolina 27607
Mr. David Cox
North Carolina Wildlife Resources Commission
1142 185 Service Road
Creedmoor, North Carolina 27522
District Manager
Division of Coastal Management
North Carolina Department of Environment
and Natural Resources
1367 U.S. 17 South
Elizabeth City, North Carolina 27909
DEPARTMENT OF THE ARF
WILMINGTON DISTRICT, CORPS OF
P.O. BOX 1890
WILMINGTON, NORTH CAROLINA 284(
IN REPLY REFER TO May 14, 1999
Regulatory Division
Action-ID-No. 199502334
Mr. William D. Gilmore, P.E., ManageF
Planning and Environmental Branch
North Carolina Department of Transportation
Post Office Box 25201
Raleigh, North Carolina 27611-5201
Dear Mr. Gilmore:
Reference the Department of the Army (DA) permit issued to you on March 5, 1998
associated with the widening of approximately 10 miles of U.S. 64-264, including constructing a
new bridge over the Croatan Sound and adjacent marshes, from US 64-264 West of Manns
Harbor to NC 345 South of Manteo, in Dare County, North Carolina (TIP No. R-2551, Federal
Aid,Project No. NHF-64(6), State Project No. 8.T051401). Also reference yeur subsequent
written request dated April 7, 1999 for a permit modification to:
a. Fill an additional 0.09 acres of Section 404 Wetlands and excavate 0.12 acres of Section
404 Wetlands adjacent to the Croatan.Sound for a drainage system to collect surface water at
discrete drop inlets along the right of way and to convey the effluent to a small drainage ditch to
be constructed immediately north of the proposed roadway fill between Stations (+/-) 32+80 and
34+40 (See Attached Figures 6-8).
b. Restore 1.4 acres of sawgrass marsh ( 1 dium jamaicense) wetlands by converting`a
section of roadway (including roadside shoulders and fill slopes) to marsh by removing the
underlying pavement and aggregate base, and grading to natural wetland elevation. This section
of roadway was constructed in marsh and will be abandoned by the permittee after the new road
is constructed (See Attached Figures 2-5). The proposed restoration area is located north and
west of the permitted roadway between Stations (+/-) 12+00 and 16+00. This wetland
restoration is provided to compensate for the wetland losses described in (a.) above.
2
According to the permittee, the original proposal would have required a permanent drainage
easement through private properties, and since the properties to be affected by the discharges are
relatively small parcels, the drainage encroachment was considered to be overly intrusive.
This modification request was coordinated at the April 15, 1999 Corps/NCDOT meeting
with the North Carolina Division of Water Quality, and other appropriate State and Federal
agencies. This coordination revealed no objections to this modification request. In addition, I
have determined that the proposed mitigation compensates for the wetland impacts. Therefore,
the permit is hereby modified in accordance with the specific work activities described above and
in accordance with the mitigation commitments in the April 7, 1999 modification request. It is
understood that all conditions of the original permit remain applicable and that the expiration
date is unchanged. In addition, the permittee will comply with the following special permit
conditions:
kk. The restoration work associated with this permit modification will be undertaken
pursuant to the "Compensatory Mitigation Proposal" in the permit modification request dated
April 7, 1999, and implemented concurrently with the final phases of construction activities
authorized by the permit to the extent. necessary to construct; monitor and maintain 1.4 acres of
riverine marsh wetlands to the satisfaction of the Corps of Engineers.
11. The mitigation property will be maintained by the permittee in its natural condition, as
altered by the implementation of the April 7, 1999 mitigation proposal, in perpetuity. Prohibited
activities within the mitigation areas specifically include, but are not limited to, the construction
or placement of buildings, signs, or any debris, waste or garbage; excavation, grading; dredging;
leveling or other earth moving activity; cutting, removal or damage of any vegetation; any
activity which would impact the drainage or water quality on the site; except as required by the
implementation of the mitigation plan or subsequent modifications which are approved by the
Corps of Engineers.
mm. Condition (11.) above runs with the land. The permittee shall not sell, lease, or otherwise
convey any interest in the property making up the mitigation site without first providing 60 days
written notice to the Corps of Engineers. The instrument effecting such conveyance shall include
legally binding restrictions on the use of the mitigation property as described in conditions
above, to be enforceable by the permittee as well as the U.S. Army Corps of Engineers,
Wilmington District. The instrument establishing such restrictions shall be subject to the
approval of the Corps of Engineers. The permittee shall enforce the terms of the required
restrictions.
nn. The permittee shall make every effort to convey the 1.4 acres of the April 7, 1999
wetland restoration property to a nonprofit conservation organization or a natural resource
agency, which is willing to hold the areas in perpetuity for conservation purposes, and is
acceptable to the Corps of Engineers. The annual monitoring reports will include the statues of
the conveyance efforts.
3
oo. The permittee shall contact the Corps of Engineers, Washington Regulatory Field Office
NCDOT Regulatory Project Manager and provide him with the opportunity to attend the yearly
mitigation monitoring efforts.
pp. The permittee will submit the yearly mitigation monitoring reports by December 31 of
each monitoring year.
qq. Hydrology in the restoration areas will be monitored through the use of monitoring wells
during each growing season for the first five years of the vegetative monitoring. A minimum of
two wells will be placed within the 1.4 acre wetland restoration area.
rr. To meet the hydrology success criteria, the monitoring data must show that for each
normal precipitation year within the monitoring period, the site has been inundated or saturated
within the upper 12 inches of soil for a minimum of 25 % of the growing season. WET tables
for Dare County will be utilized to determine normal precipitation years.
ss. Phragmites (Phragmites australis) will be killed or removed from the restoration area. The
annual monitoring report will address all Phragmites removal activities.
tt. Prior to the commencement of any drainage work associated with this modification
request, the permittee shall conduct a soils boring test within the restoration area to determine the
depth of undercut and the type and amount of fill material used for road construction. A report
summarizing the findings from the soils boring test will be submitted to the Corps of Engineers
for review and comment. The amount of fill material to be removed prior to restoration efforts
will be coordinated with the Corps of Engineers.
Any questions regarding this correspondence may be directed to Mr. Michael Bell, NCDOT
Coordinator/Regulatory Project Manager at the Washington Regulatory Field Office, telephone
[phone], extension 26.
Sincerely,
Terry R. Youngbluth
Colonel, U.S. Army
District Engineer
Enclosures
Copies Furnished:
Mr. Randall Turner
N.C. Department of Transportation
Division I Environmental Officer
113 Airport Drive, Suite 100
Post Office Box 850
Edenton, North Carolina 27932
Mr. John Parker
Division of Coastal Management
N.C. Department of Environment
and Natural Resources
Post Office Box 27687
Raleigh, North Carolina 27611-7687
Mr. John Dorney
D' ision of Water
C. Department of Environment
and Natural Resources
Wetlands and Aquatic Plants
4401 Reedy Creek Road
Raleigh, North Carolina 27607
4
Mr. Larry Hardy
National Marine Fisheries Service
Pivers Island
Beaufort, North Carolina 28516
Mr. John M. Hefner
U.S. Fish and Wildlife Service
Fish and Wildlife Enhancement
Post Office Box 33726
Raleigh, North Carolina 27636-3726
Mr. William L. Cox, Chief
Wetlands Protection Section - Region IV
Water Management Division
U.S. Environmental Protection Agency
61 Forsyth Street
Atlanta, Georgia 30303
- FEW -04'99(THU) 13:08 USACOE
TEL:[phone]
FAOSiMjU TAANSIIAITTAL HEADER SHEET
mm" a QCISCA
COMMANOI
ap7r cs
WASHINGTON
REGULATORY
PI-OLD 014:1c$
TO:
CC5'AVV--C0-RW

CLASSIFICATION I PRECEOEyCzl
RENIAAKS

t4 ? DtF M
PAGES DATE-TIME
idlnq MO
To: Mr. Ikon Secliler, NwS
Ms. Cyndi Bell, NCDEM
Mr. Dennis Hawthorne, CAMA
Mr. David Cox, NCWRC
.As. Kathey Matthews, EPA
Mr. Toni McCartney, USFWS
Ms, Sarah Winslow, NCDMF
CC: Mr. David Lekson., USACE
From; Mr. Michael F. Bell, USACE
Subject: Permit Modification Request
No.
VONltr 2mm.)
(979) 97,5-1416
FAX NO.
W U70VONlGn=J
(919) 97S-ISS9
P. 001
OL0j-13'6-17It tc1-jt-73'S-q9 C9
YEAR RELEASER'S SIGNATURE
NCDOT has requested a permit modification concerning Tip No, R.-2551, WIDFNING
APPROXIMATELY 10 MILES OF U,S, 64-264, INCLUDING CONSTRUCTING A NEW
BRIDGE OVER. THE CROATAN SOUND AND ADJACENT MARSHES, FROM
US 64-264 'IyiTEST OF MANNS HARBOR TO NC 345 SOUT I OF MANTEO, TN DARE
COUNTY. NORTH CAROLINA, TIP NO. R-2551, FEDERAL AID PROJECT NO.
NHF-64(6), STATE PROJECT NO. 87051401, Action ID No. 199502334. The permittee has
applied for a modification to the permit (SEE FOLLOWING Ll~TTER DATED JANUARY 14,
1999).
Please respond to this modification request to: Mr. Michael F. Bell, Washington Regulatory L+ield
Office, Peat Office 13011000, Washington, North Carolina 27889-1000, or E-mail
Michael.F.Bell@$AW02.USACE.ARMY.MIL by February 16,1999, or telephone (919)975-
1616, extension 26.

FE9. -04' 99 (THU) 13:08
USAGOE
TEL:[phone]
u7ffd4.5 3y
e~ d
JAMES B. HUNT JR.
GOVERNOR
January 14, 1999
Mr. Mike Bell
U.S. Army Corps of Engineers
Post Office Box 1000
Washington, North Carolina 27889
Dear Mr, Bell.
E. NORRTS TOLSON
SWim -rARV
SUBJECT: Mashoes Road Mitigation Site, Dare County, TIP Project R-2551 WM
The grading for this mitigation site is approximately 95% complete. The portion of the
site located on the west We of Mashoes Road and the southern portion of the site east of
Mashoes Road have been graded and are ready for planting. However, a problem has occurred
with one small area on the north side. This soil has become a soupy, thick muck that will not
respond to further grading- The contractor, Higgerson-Buchanan, has completed all grading that
is possible at this time. The contractor created a bo-m around this rnuclc to separate it from the
rest of the site.
It is our determination that the area cannot be properly graded until it has been given
adequate time to dry. To prevent detaining the contractor, NCDOT had the final inspection sad
closed the construction contract on January 5, 1999. The Division determined that it would
prefer to initiate a new contract once the area has improved.
We are committed to completing this mitigation site in a timely manner; however,
extraordinary site conditions preclude 100% completion of the grading work at this time.
Therefore. our current action plan follows:
1. Plant the western section of the site with trees thi s winter. On the eastern side,
Phragmites colonization is still a problem. Because the removal of Phragmites is a
permit requirement, we would like to delay planting until the next year. This will give
NCDOT two additional opportunities (spring 1999 and fall 1999) to eliminate the
Phragmites on site prior to planting tine site with marsh grasses. If the USAGE is not
agreeable, then the majority of the eastern area can be planted in spring 1999, but it will
be much more difficult to control the Phragmites.
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
P. 002
JAN 2 5 1999
REGULATORY I RANCH
Y
FED. -04'99(THU) 13:08 USAGOE TEL:[phone]
-'. Mashoas Road Mitigation Site 2
r
2. Wait several months to give the muck area time to dry and consolidate naturally,
3. Initiate a new grading contract to complete the work, It is anticipated that there is
adequate material in this muck area to complete the job. The muck area is also directly
accessible from Mashoes Road so that no impacts should occur to the planted portion of
the site. This work should be accomplished this summer.
4. Plant the muck area during spring 2000 to complete the job.
Since this mitigation site will provide the accessary mitigation for Projects R-2551A
(under construction) and R-2551B (to be, let in July 1999), the NCDOT requests assurances from
the USA.CE that our action plan is acceptable to your agency and will not negatively affect the
existing,Depargment of the Army pennit for the R-2551 projects. if you have questions or
concerns, please contact Mr. M. Randall Tumor 41 252/482-7977.
Sincerely,
4
William D. Gilmore, P.E., Manager
Project Development and Environmental
Analysis Branch
'tiV'DCY/cc
Cc: Bob Capehart, P.E., Division 1 Construction
M. Randall Turner, Division 1
Randy Wise, P.E., Roadside Environmental Unit
V.C. Bruton, Ph.D., Project Development and Environmental Analysis Branch

a'R
U
S??c s,
P. 003
a. V,
-, J_ V_ t r? -' I E

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k,
IN REPLY
Regulatory Division
t
ENT OF THE ARMY
IICT, CORPS OF ENGINEERS
V W.O. BOX 1890
WILMINGT?R,, RTH CAROLINA 28402-1890
MAY 2 5'-Y?-J a,y 17, 1999
TO

Action ID: 199502334
Mr. E. Norris Tolson
Secretary of Transportation
State of North Carolina
Post Office Box 25201
Raleigh, North Carolina 27611-5201
Dear Secretary Tolson:
This correspondence confirms that on May 12, 1999, Messrs. David d Tom Walker
of my Regulatory Division staff conducted an inspection of a b ow and w sit associated
with the North Carolina Department of Transportation's (NCD T) Manteo B s project, TIP
R-2551, in Dare County, North Carolina. This project was autho ' ed by D artment of the
Army (DA) permit No. 199502334 on March 5, 1998. Also in attendance was Mr. Pablo
Hernandez of your staff. The subject borrow and waste site belongs to Mr. Rex Tillet, Coastal
Contractors, and is located approximately 3 miles south of the intersection of N.C. 345 and U.S.
64/264, adjacent to the Croatan Sound, north of Wanchese, in Dare County, North Carolina.
Condition (b.) of your DA permit states, "The permittee and its contractors and/or agents shall
not excavate, fill, or perform landclearing at any time in the construction or maintenance of this
project within waters and/or wetlands, except as authorized by this permit or any modification to
this permit. There shall be no excavation from or waste disposal into jurisdictional wetlands or
waters associated with this permit without appropriate modification of the permit." My staff's
inspection revealed that unauthorized spoil material generated from NCDOT's construction work
associated with the Manteo Bypass project was actively being placed within wetlands at the
Tillet Borrow and Waste Site.
Therefore, the North Carolina Department of Transportation is now in non-compliance with
its Department of the Army permit and, consequently, in violation of Section 404 of the Clean
Water Act (33 USC 1344). The contractor has been ordered to immediately restore pre-project
wetland elevations and contours to the effected areas. Since the contractor's actions have placed
NCDOT in non-compliance with its DA permit and may jeopardize the timely continuation of
the Manteo Bypass project, I encourage you to do everything within your power to facilitate the
restoration of this site.
r

2
I am very concerned that this violation occurred after my staff, on several occasions, met
onsite with your staff and the contractors and informed them of our concerns and cautioned them
to avoid impacting these very wetland areas. I encourage you to institute all appropriate and
necessary measures to prevent violations such as this from occurring in the future. I trust that
your efforts to resolve this matter and prevent future such actions from occurring will preclude
the need for me to pursue other courses of action.
My staff is available to assist you in identifying the appropriate restoration requirements for
this site. Any questions regarding this matter may be addressed to Mr. David Franklin in my
Regulatory. Division, telephone [phone].
Sincerely,
Terry R. Youngbluth
Colonel, U.S. Army
District Engineer
Copies Furnished:
Mr. William D. Gilmore, P.E., Manager
Planning and Environmental Branch
N.C. Department of Transportation
Post Office Box 25201
Raleigh, North Carolina 27611-5201
United States Attorney
Eastern District of North Carolina
310 New B ern Avenue
Suite 800, Federal Building
Raleigh, North Carolina 27601
Mr. John Hefner
U.S. Fish and Wildlife Service
Fish and Wildlife Enhancement
Post Office Box 33726
Raleigh, North Carolina 27636-3726
Mr. William L. Cox, Chief
Wetlands Section - Region IV
Water Management Division
U.S. Environmental Protection Agency
61 Forsyth Street, SW
Atlanta, Georgia 30303,
Mr. Larry Hardy
National Marine Fisheries, NOAA
Habitat Conservation Division
Pivers Island
Beaufort, North Carolina 28516
Regional Director
National Marine Fisheries Services, NOAA
Southeast Regional Office
9721 Executive Center Drive NORTH
Saint Petersburg, Florida 33702
r

3
Mr. Doug Huggett Mr. John Dorney
Division of Coastal Management Division of Water Quality
N.C. Department of Environment, N.C. Department of Environment
and Natural Resources and Natural Resources
Post Office Box 27687 V,wetlands and Aquatic Plants
Raleigh, North Carolina 27611-7687 4401 Reedy Creek Road
Raleigh, North Carolina. 27607
District Manager
Division of Coastal Management
N.C. Department of Environment
and Natural Resources
1367 U& 17 South
Elizabeth City, North Carolina 27909
Mr. Floyd Williams
Division of Land Quality
N.C. Department of Environment
and Natural Resources
943 Washington Square Mall
Washington, North Carolina 27889
DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
P.O. BOX 1890
WILMINGTON, NORTH CAROLINA 28402-1890
IN REPLY REFER TO
Regulatory Division
Action ID No. 199502334
Mr. William D. Gilmore, P.E., Manager
Planning and Environmental Branch
North Carolina Department of Transportation
Post Office Box 25201
Raleigh, North Carolina 27611-5201
Dear Mr. Gilmore:

Reference the Department of the Army (DA) permit issued to you on March 5, 1998,
associated with the widening of approximately 10 miles of U.S. 64-264, including constructing
a new bridge over the Croatan Sound and adjacent marshes, from US 64-264 West of Manns
Harbor to NC 345 South of Manteo, in Dare County, North Carolina (TIP No. R-2551, Federal
Aid Project No. NHF-64(6), State Project No. 8.T051401). Also reference your subsequent
written request dated January 14, 1999, for a permit modification to:
a. Plant the western section of the site with trees as scheduled. On the eastern side of the site,
Phragmites australis colonization is still a problem. Because the removal of Phragmites australis
is a permit condition, NCDOT proposes to delay planting one year to allow NCDOT two
additional opportunities (spring 1999 and fall 1999) to eliminate the Phragmites australis on the
site prior to planting the site with marsh grass. This delay would also allow the wet, mucky
previous pit area time to dry and stabilize. The entire marsh area would have to be planted
during spring 2000.
According to the permittee, this action would still run concurrently with the construction of
the road project and would provide better opportunity to eliminate Phragmites australis.
This modification request has been coordinated by facsimile dated February 4, 1999, with the
North Carolina Division of Water Quality, and other appropriate State and Federal agencies. This
coordination revealed no objections to this modification request. Therefore, the permit is hereby
modified in accordance with the specific work activities described above. It is understood that
all conditions of the original permit remain applicable and that the expiration date is unchanged.
February 26, 1999
1 !'
2
Any questions regarding this correspondence may be directed to Mr. Michael Bell, NCDOT
Coordinator/Regulatory Project Manager at the Washington Regulatory Field Office, telephone
[phone], extension 26.
Sincerely,
Terry R. Youngbluth
Colonel, U.S. Army
District Engineer
Copies Furnished:
Mr. Randall Turner
N.C. Department of Transportation
Division I Environmental Officer
113 Airport Drive, Suite 100
Post Office Box 850
Edenton, North Carolina 27932
Mr. John Parker
Division of Coastal Management
North Carolina Department of Environment
and Natural Resources
Post Office Box 27687
Raleigh, North Carolina 27611-7687
Mr. John Domey
Division of Water
North Carolina Department of Environment
d Natural Resources
etlands and Aquatic Plants
4401 Reedy Creek Road
Raleigh, North Carolina 27607
Mr. Larry Hardy
National Marine Fisheries Service
Pivers Island
Beaufort, North Carolina 28516
Mr. John M. Hefner
U.S. Fish and Wildlife Service
Fish and Wildlife Enhancement
Post Office Box 33726
Raleigh, North Carolina 27636-3726
Mr. William L. Cox, Chief
Wetlands Section-Region IV
Wetlands Management Division,
U.S. Environmental Protection Agency
61 Forsyth Street Southwest
Atlanta, Georgia 30303
ANNUAL REPORT FOR 2001
Mashoes Road Mitigation Site
Dare County
Project No. 8.T051402
TIP No. R-2551WM
Prepared By:
Natural Systems Unit & Roadside Environmental Unit
North Carolina Department of Transportation
December 2001
TABLE OF CONTENTS
EXECUTIVE SUMMARY .................................................................... 1
1.0 INTRODUCTION ........................................................................
1.1 Project 2
Description ...........................................................
1.2 Purpose ........................................................................
1.3 Project History ................................................................
1.4 Debit Ledger ..................................................................
1.5 Permit Related Requirements ............................................ 4
2.0 HYDROLOGY ............................................................................
2.1 Success Criteria ..............................................................
6
2.2 Hydrologic Description .....................................................
2.3 Results of Hydrologic Monitoring ........................................ 9
2.3.1 Site Data .............................................................
2.3.2 Climatic Data ........................................................ 13
2.4 Conclusions ..................................................................... 13
3.0 VEGETATION ........................................................................... 15
3.1 Success Criteria .............................................................. 15
3.1.1 Success Criteria (Trees / West Side) ................................. 15
3.1.2 Success Criteria (Marsh Grass / East Side) ........................ 15
3.2 Description of 15
Species ......................................................
3.3 Results of Vegetation Monitoring ........................................ 16
3.4 Conclusions ................................................. :.................. 21
4.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS ......................... 22
TABLES
TABLE 1 - MASHOES ROAD DEBIT LEDGER ...................................... 3
TABLE 2 - 2001 HYDROLOGIC MONITORING RESULTS ....................... 10
TABLE 3 - 2001 VEGETATIVE MONITORING RESULTS (WEST SIDE).... 16
TABLE 4 - 2001 VEGETATIVE MONITORING RESULTS (EAST SIDE)...... 17
FIGURES
FIGURE 1 - SITE LOCATION MAP ...................................................... 5
FIGURE 2 - MONITORING GAUGE LOCATION MAP ............................. 8
FIGURE 3 - 2001 HYDROLOGIC MONITORING RESULTS ..................... 12
FIGURE 4 - 30-70 PERCENTILE GRAPH ............................................. 14
APPENDICES
APPENDIX A - DEPTH TO GROUNDWATER GRAPHS
APPENDIX B - PHOTO AND VEGETATION PLOT LOCATIONS,
SITE PHOTOS
MASHOES ROAD MITIGATION SITE
2001 REPORT - EXECUTIVE SUMMARY
The following report summarizes the monitoring activities that have occurred in the past
year at the Mashoes Road Mitigation Site. Construction began on this site in 1998.
The west side of Mashoes Road was completed in early 1999 and was planted with
trees; this area was replanted in the Winter of 2000-01. The east side of Mashoes
Road was completed in the fall of 1999 but was not planted due to Phragmites control.
The site was planted with marsh grass in the spring of 2001. Monitoring activities in
2001 represent the first year of monitoring at the mitigation site. The site must
demonstrate hydrologic and vegetation success for a minimum of five years or until the
project is deemed successful.
The site contains nine groundwater monitoring gauges on the west side, ten surface
gauges on the east side and one rain gauge. On the east side, there are a total of 167
random vegetation plots, while the west side has five permanent vegetation plots.
This year, rainfall data has been acquired primarily from an onsite gauge. Also, daily
rainfall was used for comparison from the Manteo Airport, maintained by the NC State
Climate Office.
Hydrologic monitoring indicated that the site is continuing toward success. Under
normal conditions for 2001, all nine of the groundwater gauges met the jurisdictional
hydrologic success for at least 12.5% of the growing season. All ten of the surface
gauges showed steady tidal influence that maintained a water elevation above zero
under normal conditions for at least 25% of the growing season.
Vegetation monitoring on the west side of the restoration area yielded 649 trees per
acre, above the 320 tree requirement. On the east side, a frequency of 46.4% for the
targeted vegetative species was found. A frequency of 70% is required. A vegetative
scale value of 3.2 was recorded. A scale value of 5 is required by year 5.
Based on the monitoring results for this growing season, NCDOT proposes to continue
hydrologic and vegetation monitoring.
1.0 INTRODUCTION
1.1 Project Description
The Mashoes Road Wetland Mitigation Site is located north of Manns Harbor in Dare
County (Figure 1). It is bounded by US 64-264 to the south, the Alligator River
National Wildlife Refuge to the west, the Croatan Sound to the east, and is bisected
into east/west by SR 1113 (Mashoes Road).
A significant portion of the site (254 acres) was classified as a coastal marsh and fell
under the jurisdiction of the N.C. Division of Coastal Management. Another portion
(107 acres) was classified as forested wetlands. The remainder of the site was
comprised of a 15-acre pond, borrow pits and cleared uplands from a sand mining
operation, and some forested uplands.
The site encompasses approximately 399 acres and is designed as a mitigation site
primarily for the new Croatan Sound Bridge between Manns Harbor and Manteo , TIP
Projects R-2551 and K-4003 (USACE Action ID No. 199502334).
1.2 Purpose
In order to demonstrate successful mitigation, hydrologic and vegetative monitoring
must be conducted for a minimum of five years or until success criteria are fulfilled.
Success criteria are based on federal guidelines for wetland mitigation. These
guidelines stipulate criteria for both hydrologic conditions and vegetation survival. The
following report details the results of hydrologic and vegetative monitoring during 2001
at the Mashoes Road Mitigation Site.
Activities in 2001 reflect the first year of monitoring at the mitigation site. Included in
this report are analyses of both hydrologic and vegetative monitoring results as well as
local climate conditions throughout the growing season.
1.3 Project History
Winter 1999
Spring 1999
Spring 1999
March 1999
March - November 1999
October 1999
March - November 2000
October 2000
March - November 2001
April 2001
May 2001
August 2001
August 2001
1.4 Debit Ledger
West Side Construction Complete
Wetland Trees Planted (West Side)
East Side Construction Complete
Monitoring Gauges Installed (Entire Site)
Hydrologic Monitoring (Entire Site, Year 1)
Vegetation Monitoring (West Side, Year 1)
Hydrologic Monitoring (Entire Site, Year 2)
Vegetation Monitoring (West Side, Year 2)
Hydrologic Monitoring (Entire Site, Restart Year 1)
Phragmites Treated
Marsh Grasses Planted
Tree Vegetation Monitoring (Restart Year 1)
Marsh Vegetation Monitoring (Year 1)
Because of its size, Mashoes Road will provide mitigation for several highway
projects. Table 1 shows the projects that this site is providing mitigation for
through November 2001.
Table 1
Mashoes Road Debit Ledger
Habitat Acres at
Start Acres
Remaining TIP Debit
R-2551 TIP Debit
K-4003
SVM Restoration 13.1 0 13.1 0
Forest Wetlands
Restoration 8 0 8 0
SVM Preservation 253.86 130.96 122.9 0
Forest Wetland
Preservation 106.88 29.32 76.2 1.36
Open Water 15.53 15.53 0 0
Upland Hummocks 1.48 1.48 0 0
Total: 398.85 177.29 220.2 1.36
3
1.5 Permit Requirements
The Mashoes Road Mitigation Site was constructed primarily to compensate for
impacts to TIP Project R-2551 (USACE Action ID No. 199502334). Permit
commitments stated that Phragmites australis would be totally controlled in the marsh
area.
The permit was modified in 2000, which allowed for marsh planting to be extended to
the spring of 2001. This gave NCDOT additional time to further treat for phragmites.
The site was treated for Phragmites in 2000. The planting of marsh grass at the site
was completed in spring 2001.
4
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2.0 HYDROLOGY
2.1 Success Criteria
In accordance with federal guidelines for wetland mitigation, the success criteria for
hydrology in the forested wetland (west side) states that the area must be inundated or
saturated (within 12 inches of the surface) by surface or ground water for at least
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% - 12.5% of the
growing season can be classified as wetlands depending upon other factors, such as
the presence of hydrophytic vegetation and hydric soils.
In the coastal marsh wetland (east side), success criteria include saturation or
inundation within 12 inches of the surface for at least 25% of the growing season, or
statistically the same as the reference ecosystem.
The growing season in Dare County begins March 13 and ends November 25. The
dates correspond to a 50% probability that temperatures will drop to 28° F or lower after
March 13 and before November 25.1 The growing season is 258 days; therefore the
optimum duration for wetland hydrology is 32 days. Also, local climate must represent
average conditions for the area.
2.2 Hydrologic Description
Historically, the wetlands on this tract were part of the coastal marsh of the surrounding
area. The primary sources of hydrology are tidal flushing of the system and
groundwater. After an extensive study of the site's hydrology, it was concluded that
filling of the ponds, and grading down of the upland areas would elevate soils to a level
that would saturate the soil stratum within the required twelve inches or even flood the
area during high tides. It was predicted that this would be sufficient to restore wetland
hydrology.
Six groundwater monitoring gauges, eight surface gauges, and one rain gauge were
installed in 1999 (Figure 2). Three more groundwater monitoring gauges were installed
during 2001 to evaluate potential drainage by the side canal. Also, two additional
surface gauges were added to the coastal marsh wetland area. The rain gauges and
monitoring gauges recorded daily readings of rainfall and depth to groundwater,
respectively. The surface gauges record tidal conditions eight times daily; however,
only one representative reading was used for graphing and statistical purposes in this
report.
1 Natural Resources Conservation Service, Soil Survey of Dare County. North Carolina, p.69.
6
This year, rainfall data has been primarily from an onsite gauge. Also, daily rainfall
was used for comparison from the Manteo Airport, maintained by the NC State Climate
Office.
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2.3 Results of Hydrologic Monitoring
2.3.1 Site Data
For groundwater monitoring gauges on the west side of the mitigation site, the
maximum number of consecutive days that the groundwater was within twelve inches of
the surface was determined for each gauge. For surface gauges, the ground surface
was used (elevation zero) to give a better representation that the east side of Mashoes
Road was receiving daily tidal flooding. This number was converted into a percentage
of the 256-day growing season. Table 2 presents the 2001 results. In the table, "MR"
refers to Mashoes Road Mitigation Site, "S" refers to surface gauges, and "G" refers to
groundwater gauges. Reference gauges and new gauges are indicated.
In order to meet the success criteria for hydrology, the surface water gauges needed to
show groundwater levels within 12 inches of the surface for at least 25% of the growing
season. Since the criteria in the mitigation plan were unclear whether hydrology should
be met in consecutive days or total days, the table shows both sets of data.
Appendix A contains a plot of the groundwater depth for each monitoring gauge. The
maximum number of consecutive days that the gauge met success above this 12-inch
depth is noted on each graph. Data determined to be erroneous was omitted;.
therefore, some gaps appear in the plots.
Precipitation events are included on each graph as bars.
Table 2
2001 HYDROLOGIC MONITORING RESULTS
(MARCH 13 - NOVEMBER 25)
Monitoring
Gauge < 5%
(<13 dy) 5-8%
(13-20 dy)' 8-12.5%
(21-32 dy) > 12.5%
(>32 dy) Actual
Consecutive
% Actual
Cumulative
% Dates`
Meeting.
Success
MR-S1 (ref) ? 20.9% 79.8% 3/13-5/5
MR-S2 ? 76.7% 94.1% 5/12-11/25
MR-S3 ref ? 100% 100% 3/13-11/25
MR-S4 re ? 100% 100% 3/13-11/25
MR-S5 ? 14.7% 64.7% 5/29-7/5,
7/29-9/2
(both 38
days)
MR-S6 ? 100% 100% 3/13-11/25
MR-S7 re ? 100% 100% 3/13-11/25
MR-S8 ? 100% 100% 3/13-11/25
MR-G9 re ? 48.4% -- 3/13-7/15
MR-G10
ref ? 100% -- 3/13-11/25
MR-G11 ? 21.3% -- 3/13-5/6
MR-G12 ? 100% -- 3/13-4/28
MR-G13
ref ? 63.6% -- 3/13-8/23
MR-G14 ? 22.0% -- 5/12-7/7
MR-G15 ? 13.6% -- 7/30-9/2
MR-G16 ? 14.3% -- 7/26-9/4
MR-G17 ? 18.2% -- 7/24-9/14
MS-S18 ? 99.2% -- 3/28-11/25
MS-S19 ? 99.2% -- 3/28-9/21
Notes: "MR" denotes Mashoes Road site gauges.
"S" denotes surface gauges.
"G" denotes groundwater gauges.
"ref" denotes gauges in reference wetlands.
Figure 3 is a graphical representation of the hydrologic monitoring results for this year.
A blue dot (or square) represents wetland hydrology for more than 12.5% of the
season; a red dot/square indicates hydrology between 8% and 12.5%; a green
dot/square represents hydrology between 5% and 8%.
For this time period from March to November, all nine groundwater gauges met the
jurisdictional hydrologic success of at least 12.5% during the growing. season.
It is unclear whether the surface gauge criteria should be met in consecutive days or
total days, so the table shows both sets of data. When considering the total
consecutive days, eight of the ten surface gauges recorded that flooding occurred at
least 25% of the growing season. However, if the cumulative days are considered, all
ten gauges met the hydrologic requirements.
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2.3.2 Climatic Data
Figure 4 represents an examination of the local climate in comparison with historical
data in order to determine whether 2001 was "average" in terms of climate conditions.
The figure compares the rainfall from 2001 with that of historical rainfall (data collected
between 1931 and 1999). All rainfall data was collected from the NC State Climate
Office. The graph shows 2000 rainfall totals recorded at the Manteo Airport from
September through December; the graphs also shows 2001 rainfall totals recorded at
the Manteo Airport through July. Information from the Manteo Airport for the months of
August through December was not available at this writing of this report. Rainfall data
for August through December 2001 will be presented in the 2002 Annual Monitoring
Report. On-site rain gauge information is also shown for the duration of the growing
season (March through November).
According to the on-site rain gauge, 2001 has been a dry year overall. Most readings
fall below or barely within the 30th percentile. However, the rainfall data obtained form
the Manteo airport shows that rainfall was average to above average for 2001. Figure
5 shows a discrepancy between monthly totals on site versus the data from the Manteo
airport. For 2001, March was below normal, whereas, May and June were higher than
normal. Overall so far, 2001 has been an average year in terms of precipitation.
2.4 Conclusions
2001 represents the third full growing season (but the first.official season) that the
hydrologic data has been examined. All nine groundwater monitoring gauges met the
jurisdictional wetland hydrology for 12.5% of the growing season; when considering
cumulative days, all ten surface gauges met the 25% requirement of daily flooding the
site during this same period.
The overall monitoring results show that the site performed adequately from a
hydrological standpoint.
12
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3.0 VEGETATION (YEAR 1 OF 5)
3.1 Success Criteria
The following section discusses the vegetative success criteria outlined in the
mitigation plan for Mashoes Road mitigation site.
3.1.1 Success Criteria (Trees/ West Side)
NCDOT will monitor the site for five years or until success criteria is met. A 320 stems
per acre survival criterion for planted seedlings will be used to determine success for
the first three years. The required survival criterion will decrease by 10% per year after
the third year of vegetation monitoring (i.e., for an expected 290 stems per acre for year
4, and 260 stems per acre for year 5). The number of plants of one species will not
exceed 20% of the total number of plants of all species planted.
3.1.2 Success Criteria (Marsh Grasses / East Side)
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 count to the final count of plots. The vegetation component of the wetland site
will be deemed successful if the following criteria are met.
1. 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 species were planted in the Wetland Restoration Area:
Zone 1: Wetland Tree Reforestation (2.7 acres)
Taxodium distichum, Bald Cypress
Quercus phellos, Willow Oak
Nyssa sylvatica, Black Gum
Fraxinus pennsylvanica, Green Ash
Quercus nigra, Water Oak
Zone 2: Wetland Tree Reforestation ( 4.3 acres)
Taxodium distichum, Bald Cypress
Fraxinus pennsylvanica, Green Ash
14
Quercus nigra, Water Oak
Quercus phellos, Willow Oak
The following plant communities were planted in the Marsh Grass Area:
Zone 1: (approximately 11.92 acres)
Cladium jamaicense, Sawgrass
Zone 2: (approximately 0.42 acres)
Juncus roemerianus, Black Needle Rush
3.3 Results of Vegetative Monitoring
Table 3 shows the results of vegetative monitoring on the west side of Mashoes Road
for the year 2001. Table 4 shows similar results for the vegetative monitoring on the
east side of Mashoes Road.
Table 3
2001 VEGETATIVE MONITORING RESULTS (WEST SIDE)

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ZONE K m
1 1 17 3 5 4 3 32 40 544
2 18 7 9 4 2 40 40 680
ZONE 1 AVE RAGE 612
1 2 1 3 1 8 1 1 1 36 1 1 4 1 49 1 49 680
1 5 1 5 1 15 1 10 1 1. 5 1 35 1 35 1 680 1
TOTAL AVERAGE 649
15
Table 4
2001 VEGETATIVE MONITORING RESULTS (EAST SIDE)

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9 10
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10 5.0 Rarnyard grass
H 2.0
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12 5.0 R -ri-us- Barnyard 2rass. 2" water
13 1 50 S am?ricanu Barnyard grass
14 5.0 Barnyard grass
15 i-o Rarnyard grass- 2" water
16 4.0 Barnyard grass, 2" water
17 20 Rarnyard grass
5.0 Barnyard 2rass. 7" water
19 3.0 ? ? Barnyard rass r'
4.0 Rarnyard grass
4.0
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22 4.0
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4" water
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5.0 Barnyard grass, Sicklenod- Smartweed
2-0 Barnyard grass
27 400 Barnyard grass, 2" water
28 50 s americanus
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31 30 S americanus. Barnyard grass

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3.0 S americanus. Barnyard grass

2.0 Rarrivard grass. Phragmites
J J
38 2O
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39 2.0 1) vnicata
4"Water
40 5-0 v
41 5.0 ? ? Barnvard grass
42 3.0 J J
Rarrivard gmq
43 .0 ? J Cattail
0 Barnyard -rass. 2" water
4"
46 5.0 Barnyard grass. 1" water
16
Table 4 continued...
2 C Lr'.
Notes
4
48 .0 Barnyard urasq. Cattail
49 0.0 Rare ground
50 4" water
51 1 0
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53 0.0 Ijare ground
54 5.0 S americanus. Barnyard grass
55 3.0 S. mericanus
56 3.0 J ?
S mericanus - Barnyard grass
57 5.0 americanus. Barnyard rass r

59 2.0 americanus
60 -
3O S americanus. Barnyard grass
61 0 S- americanus
J ?
63 5,0 americanus. Barnyard rass 4" water

65 5.0 ? ? Barn rd grass
66 4.0 ? ?
lBarnvard grass
67 0.0 Bare around

70
2.0 J ?
7
72 3.0 ? ?
S americanus. Barnyard grass
7
74 5O
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75 -
2O 1) snirata- Barnyard gra-s- Phramites
? J

78 Phragmites
79 4-0 Is americanus- Flencharis sp., Woolprass

81 2.0 S ameriramis Barnyard grass

83 2.0 ? ? Barnyard rass 1" water
84 2-0 ,Utail. Barnyard grasq
C
85 1.0 ? ? .
Barnyard rass 6" water
86 2-0 ? ?
Barnyard grass
87 2.0 ? ? Phra mite
88 2.0
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89 5.0 Barnyard grass
90 4.0 ? ?
Barnyard grass, D- snicata - 7. ameri
91 3.0 ? J Barnyard Prass. Cattail, Phra mites
92 0.5
17
Table 4 Continued...
Z
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Notes
/ J
4 1.0 Barnyard grass, Phragmoteq

95
1.0 J J
96 2.0
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97 2.0 1). svicata
J J
99 1.0 Barnyard grass
100 5.0 ? ?
Barnyard grass, Smartweed. Fennel, Aster sn.
101 4.0 ? ? 1) spicata. S- i Phra mite
102 5.0 Barnyard erass
103 5.0 Barnyard ra
104 2.0 ? ? T) -i-f, PhragMiteS
105 4.0 ricanus. Barnyard grass. 6" water
S, ame
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107 5.0 Barnyard grags
108 4
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1 13 2.0
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117 2.0 Barnyard grass
J J
119 4.0 Barnyard grass .4; americanus.
10 J J
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121 2.0 J J 'spicata. Phra mit
0 J / S americanus. Barnyard grass
123 5.0 B rn and grass. 2" water
124 1.0 Barnyard grass. .7. americanuv Phraizmites
125 5.0 S. americanus. Barnyard rass 1" water
126 50
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127 2.0
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0
136 5.0 IS, r r' s u s r s.
Is. americanus - Cattail
138 5.0 Eleocharis s I" water
18
Table 4 Continued...

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139 2.0 Bam
ard.grass. 2" water
1401 2.L -
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141 1 --
3.0 Cattail. 4" water
1421 4.0
J
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1441 0.0 Rare Pround
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146 if) -f mhustus
147 5.0 Ramvard grass, Eleorharis sn., 2" water
148 5.0 Cattail
4 ? J
150 3.0 Eleocharis so, I " water

50
153 O.o .... Rare ground
154 5.0 S americanmy

156 1 5.0 Cattail
1571 5.0 Cattail
1591 5.0
J
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J ?
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161 SO
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169 10
J
J
163 5-0
J
J S, americanmy, Cattail
1 164 40
J
? S. americanus
165 1 50
?
? S, americanus, Aster sp., Fennel
166 50
J
? S. americanus
67 20
J
J S. ampricanus, Cattail

0
Sum Scale Value 536.5
Total # of lots 166
3.2

19
Site Notes: Other species noted: Scirpus americanus, sawgrass, black needle rush,
Bidens sp., ragweed, Baccharis halimifolia, fennel, phragmites, redbay, cattail, red
maple, and Pluchea sp. Trees were difficult to find in plot 1 due to thick grasses.
3.4 Conclusions
(West Side)
Of the 399 acres on this site, approximately 7 acres involved tree planting. This side of
the site has also become extremely well vegetated with marsh grasses. There were 5
plots established throughout the planting areas, encompassing all plant communities.
The 2001 vegetation monitoring revealed an average density of 649 trees per acre,
which is much higher than the 320 trees per acre required by the success criteria.
(East Side)
During the 2001 monitoring of the vegetation on the east side, a frequency of 46.4% for
the targeted species was found. A frequency of 70% is required. A vegetative scale
value of 3.2 was recorded. A scale value of 5 is required by year 5.
Of the 399 acres on this site, approximately 12.34 acres involved marsh grass planting.
There were 167 random plots established throughout the planting areas, encompassing
all plant communities. These plots were located with GPS. The northern side of the
site was treated for phragmites in April 2001.
Dr. Stratford H. Kay, Aquatic and Noncropland Weed Management Specialist with
North Carolina State University, is currently working on a grant to study phragmites on
this site and other potential NCDOT mitigation sites.
20
4.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS
2001 represents the third full growing season (but the first official season) that the
hydrologic data has been examined. All nine groundwater monitoring gauges met the
jurisdictional wetland hydrology for 12.5% of the growing season; when considering
cumulative days, all ten surface gauges met the 25% requirement of daily flooding the
site during this same period. The overall monitoring results show that the site
performed adequately from a hydrological standpoint.
Vegetation monitoring on the west side of the restoration area yielded 649 trees per
acre, above the 320 tree requirement. On the east side, a frequency of 46.4% for the
targeted vegetative species was found. A frequency of 70% is required. A vegetative
scale value of 3.2 was recorded. A scale value of 5 is required by year 5.
NCDOT will continue to monitor the site for both hydrologic and vegetation success.
21
APPENDIX A
DEPTH TO GROUNDWATER GRAPHS
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APPENDIX B
PHOTO AND VEGETATION PLOT LOCATIONS,
SITE PHOTOS
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Mashoes Road -Photos
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