R2208WM

_
EEDING RATES SEEDIN( TYPE S IM & FERTILIZER SEEDING PROCEDURE MULCHING MAINTENANCE SEEDING DATE L E
Rye Grain 120 #/AC
Rye - 3 BU/AC or Aug. 15 Aug. 15 -Dec. 30
~ Wheat - 2 BU/AC or
/ Q Lime: Broadcast or drill seed uniformly and cover 1 1/2 - 2 Tons Mow the seeded area 1 Ton Agricultural to a depth of 1/4 inch to approximately 2 inches Small grain to a hieght of 2 inches
~ Spring Oats - 3 BU/AC or ~ Spring Oats - (1 1/2 BU/AC Plus Limestone or (depending on the seed mixture) except where a Straw per acre whenever the average hieght
/ Korean Les edeza 20 LBS AC Equivalent per Acre grain drill is used seed should be covered and Immediately after of grass reaches 4 inches
D.. P ) / / Les edeza Hulled & Inoculated Feb. 1 - CC P ( ) Feb. 1 -May 1 the seedbed firmed by the use of a corrugated seeding
G~' L / P Sundangrass - 30-40 LBS/AC or ~o W Fertilizer: agricultural cultipacker. Seeding implements
/ 5J ~o f.- Millet - 30-40 LBS/AC or 1000 LBS 10-10-10 should be used at right angles to the general
/ ~o ~ Sorghum Cross - 30-40 LBS/AC .~.P J~ 1 Or Equivalent Per slope to minimize erosion.
/ Q b° ' OOH Acre
""~t" SIN RATE PER ACRE IMU kf Q M WITHOUT TURF RE UIREMENT
. - Lime: Seeding may be a hydroseeder or conventional 1 - 2 Tons Straw/AC Irrigate Repair Replace
p 200 LBS Tall Fescue (KY-31) Fall Fall 2 Tons Ground methods with conventional seedings, A culti- or and restore as necessary
I-- 2 LBS Ladino Au . 1 - 9 Aug. 1 - Nov. 1 Limestone or packer should be used before and after seeding. 1000 LBS Wood to firmly establish
Z 8 LBS Red Clover Spring S rin Equivalent per Acre This is accomplished with aseeder-cultipacker Fibers/AC healthy growth P 9
W 1- 6 ~ or Feb. Feb. 1 -May 15 combination. or
INI " Z 200 LBS Tall Fescue KY-31 MU o ( ) M Fertilizer: 43 560' Jute Mat/AC 1000 LBS 10-10-10 or
Q 25 LBS Sercea Lespedeza or Equivalent Per Acre Other protective materials
Na, ~ For Spring Seddings S as developed by industry
~0 ~l ~ . A ST W RATE PER 1000 SQ. FT.
DNF FC ~ WITH TURF REQUIREMENT
MIRIFI 140 FlLTER FRABIC ~ aTF Feb. - March
A UNDER STONE _ _ _ Feb. - h (OR EQU L) o~ Tall Fescue (KY 31) 8 10 LBS Sept. - Sept. -Oct. Seeding And Mulching -Seed and mulch according to N.C. D,O.T.
Standard Specifications for roads and structures and as specified herein.
I- Common Bermuda - 2 LBS Spring Spring
Z Hulled Seed T E C A ON C D A STA Mulchin -Mulch immediately after seeding is complete. Apply mulch at uniform
w rate completely covering 50% - 75% of seeded area, Mulch required on all soils
NOT TO S Z Common Bermuda - 7 LBS Fall Q Unhulled Seed Fall exceeding 25~ slope,
~ ~ ~ Tufcote (Bermuda)
W Sod Plugs on 1' Centers March - March -July
~ Sprigs 7 BU/1000 sq, ft.
Broadcast
~ U - 3 Bermuda _ ( ) March W Same as Tufcote March -July
[n
Zo is Me t do Em ald _ ~ ( ~ ) March March -July
Same as Tufcote

~xy: I~
yr~
EROSION D SEDIMENT CONTROL MEASURES:
~ ~ Unless otherwise indicated all ve etation and structurd erodon and sediment 9
control practices will be constructed and molntained according to minimum
^ 1 _S standards and specifications of the N.C. D.O.T, Standard Spedfications
~ ~ t For Roads And Structures,
MANAGEMENT STRATEGIES & SEQUENCE OF EROSION CONTROL MEASURES:
- The following sequence of events and erosion control measures shall be incor-
' ~ ~ L. porated into the construction schedule for this project and shall apply to
- - - ~ TEES FOR ROCK SILT CHECK DAM: . all construction activities within the project limits:
\ ~ 6
_ _ _ _ _ _ _ _ _ Rt)q( SHALL BE CLASS TRIP-RAP OR STONE I 1. Temporary construction entrance shall be located where traffic will be
EROSION CONTROL (CLASS "B") ~ entering or leaving a construction site to or from a public street.
~ ANCE FROM BOTTOM OF DITCH TO H DIST Entrance shall be maintained in a condition which will prevent tracking
~ _ SIDE OF DITCH BANK. x or flowing of sediment onto public streets or existing pavement. This may require periodic top dressing with additional stone as conditions demand and repair and/or cleanout of any
~ ~ ~ T=1$' FOR CLASS IRIP-RAP. ~ ~ II T=12~ MIN. STONE FOR EROSION CONTROL measures used to trap sediment. All sediment spilled, dropped, washed or tracked onto
~ €LASS "B"). public streets must be removed immediately.
~ TO ~ PAID FOR AT THE CONTRACT UNIT PRICE 2. Tempor~y check dam is to be placed during clearing and grubbing
" II EACH ROCK SILT CHECK DAM . prior to first phase of construction.
3. All storm water management facilities including erosion control stone
are to be installed and made operational within 15 days of the start
of clearing operations including approved sediment basins.
$PN.L 8E 1' MIN. 4. The contractor shall complete drainage facilities within thirty (30) days fdlowmg the completion of rough grading at any point within the project.
BELOW {E OF LOWEST BANK. 5. All unpaved areas and/or areas disturbed by construction shall be seeded.
SPILLWAY- W MIN. I I~ 2 -0 MIN. 6. All disturbed areas which are not designed for paving, utility or
2 3 STREAM WIDTH structural uses shall not be exposed for longer than 15 days. Vegetative
6"-12" THICK N0.5 cover shall be established as per seeding schedule.
WASHED STONE. 7. Hydroseeding may be used in place of mulching on areas other than ditch
~ - _ L = ~~f banks.
8. Periodic ~spection and required maintenance must be provided.
MAINTENANCE:
In general all erosion and sedimentation control measures shall be checked
~ i. after each rainfall or weekly, whichever is most frequent and should be
cleaned and repaired according to the following schedule:
1, The sediment traps will be checked regularly for sediment clean out.
2, All seeded areas will be checked regularly to see that a good stand is
maintained. Areas should be fertilized and reseeded as needed. 3. All temporary erosion and sediment control measures shall be disposed
of within 30 days of site stabilization.
NOT TO SCALE
~1~111111II111~ DATE;
CARO ~~~ii < iii FEB 2, 1989
Q fr~l
~ ~ PHASE ONE
~ ~ i AbMLG SEAL c POPLAR BRANCH TOWNSHIP
15240 - NONE
CURRITUCK COUNTY
NORTH CAROLINA DRAWING NO. [RE DALE DESCRIPTION BY
V- REVISIONS HOC~ARD/Elm A880CIATIM KED BV: DRAWN BY; FIELD RELEASE Surveyors/Planners/Engineers
NO Boos CHURNLAND BLVn/Po BOZ sass/(so4)4W967o
JKR RMM DATE: c ?5703 2 OF 2 - -
508-88\EROS.DWG
n FILE Na.. 508_88

1133

1132 1112 ~p OI
5 r-. ;
N 1131 ~ ,
CHANNEL FLOW CALCULATION TABLE 1 rn~r a~ wer W j~ + '
DRAINAGE FLOW OPE MANNING INING VELOCITY DEPTH OF ~ ~
SL ~/L DITCH RATE 9 (FT/SEC} FLOW (FT.) moHT ov WAY 50' TAPER 1129 1130 j
N0. (CFS) ~ I e' s 4' REQUIRED FOR W LESS THAN 26' MT. I'
r m• a' r ara ~ CURRITUCX 30' BRANDY ZION ~ SOUND
1 3.5 0.50 .030/GRASS 1.72 0.71 PAVEMENT seouLn~x orra, ~4 CH. 10' R/W ~1,
2 7.3 0.45 .030/GRASS 1.99 0.96 ~ ~ PER si.ore ~s ~au~o ~ ~ ~ 70 R=30' ~ , e, ~ 1125
-
3 12.3 0.35 .030/GRASS 2.08 1.23 ~ z~ 6' EXISTING ROAD 1128 ' ~
4 3.1 0.60 .030/GRASS 1.79 0.66 i
RECOMMENDED ROAD CONNECTION
5 21.3 0.33 .030/GRASS 2.32 1.52 STBC OR ABC NEW RESIDENTIAL ROAD OR RESIDENTIAL 1125
1 TYPICAL SECTION FOR 50' R/W I A TYPICAL CUL-DE-SAC RADIUS SECTION COLLECTOR ROAD AND EXISTING STATE MAINTAINED ROAD 5 STOP CONDITION
6 11.0 0.50 .030/GRASS 2.30 .09 NOT TO SCALE NOT TO SCALE NOT TO SCALE
~ 2.4 0.55 .030/GRASS 1.63 0.61 1127
8 35.6 0.20 .030/GRASS 2.18 202 LOCAl10N MAP
9 . 0 .030 GRASS 2.29 2.04 4' ~ ~ Scale: 1 =1 MILE
42.9 0 2 / /i ~ ///i~ / ~ /
~ \ ~ i\ \
Now or Former) / / _ / / /
~ y _ , ~
TRACT 5 NELLIE BARCO i
r2 I
~s I LION A-A SEC
Now or Formerly NOT TO SCALE ~"10~ ror ro sc~
RALPH E. BARCO ro
4 22
I e 6 2 74.44'
I N6 N 6372'15" f 248297' TOTAL ~ ~
61 28? 60 'gym 281 325 73 I ~ 1 1402 ~
3 ~ ~ ~ ~ ~ i 1 ~ P
~ \ 1 ~
• N ~ ~ w v w ~ Jy P ~ 0~' P 1`' ry v ~ 9~ ~ 6P 1 p`' x`017 t P~ P~ ~ ~
Now or For ti mercy ~ a 22 TREAD ~ " '~o ~ 21 1 5 ~ 1 t'0 1 0 ~ 1 ~p~ ~C.
WELL a ti ~ ~ ~ ~P
1 ~"~i ~ 5
E 11.0 o 1 1 1 1 , 1
N 5B'41 8 m , 100.26 55' 10 0~ 300
3.0 39 • ~ ~ ~ • $ "1 • ~
i ~ ~ h 20 8.5 ~ ~ N 1 4 _ / W
F m ~ 24 N ~
O ~ Q ~ p O
NORTH CAROLINA ~ i 15 ~ ~ ~ TOP OF SLOPE o ; o ~ 2 2 m
GRID SYSTEM ~ ~ ss. 300 0 C5 3 , 25 A = 6.7 Ac. o ~ J 4 ~,P
3 h (MERIDIAN TAKEN FROM PLAT BY = ~ ^ ~ _ ~ ~ 0
;n Tc- 25 MIN. N1 = 0.4 25 S. ELMO WIWAMS) ~ m 19 - 1 IN R = tO MIN. ~ ~ 5 P EDGE OF WATER ~ 0~' 0 ~
• ~ ~ I,o- 4. M ~ q81 0 Q =11.0 cFS 5.9 IN/H ' i 4~ " pa '1 ~ ~V 2 ~ , .
N 5, v 70 44'51' E ~ =1 ~ ~ o = 24 CFS o FUTURE DEVELOPMENT OF DITCH ~
10.45 C=0.4 1 3~ N ° A=0,4 Ac. ~ e~0 ~ S A = 0,4 Ac. P ~ .h~ ~ V
2 `n~ ~ o Te=10 MN. z C=0.4 ~ 6 oh C = 0.4 i P~ W ~
- N 6 ~ • I 5.9N - ~ • 26 TC- 1D MIN. s . ~ ~ J Tc= 10 MIN. a py ~ ~ ~ l ~i~ ~ ~
°y, Q = 3.1 cFS 18 1 ho= 5.9 Now or' Former) % ~ 0 81 ~ ~ ho= 5.9 ~ h A' y ~
CO y ry+ a o .9+34.7 BELL ~ ' is $ 35.6 cFs 9+34 ~ ~ AIT~f '0 .Z ~ 4 ~ ry 35.6 CFS ~ IEIAPARARY 1NGRFSS/Epi<ESS ~ 0 h Q ~o
~ r2 0 • _ c 3~ o c EAST~ElVT It9 r'~ Y61CA1ED NI~N ~ 2 yh saw a~ ~ a s yh Q
h A 13 ~ - a ~ h 2 2 f N MtA3~ 1MR 32 J
3 ~ . ~ . ~ 0 17 • / G _ V
~ ~ =LO AC. 10. 1. ~ p81 C=0.4 0-• ~ ~0 2 PIER
Q 49, 1 Tc=10 INN. ~ Op \ ~ ~ ~ DRILL HOLE i
No r4 - e w R ~ . CP ~ . Q 5.6+7.3=42.9 CFS j ~ ~ IN LONG ~ Etw2~e ~ 05
(9 kp For A = .S ~c. 14 Q = 2.4+18.9 ~.2 • 6 TEMPORARY ROCK 1
~ AR mer/ C = .4 21.3 os 10 / / 0 16 '0 1 ,~c. BdiAT RAiP CHECK DAM ~
OWN ry c ~ o , / I,o= 41 n~ , 1
_ 281 + J 1 _ _ Q ~ 2. cFS ~ ~ ~ 6, , - . a . 15 . 0 1
~ _ 15 ~ Z 1 ' 106 1
• P.P. ~ \ 0 4e .RCP • / . / HATCHfI HATCHED AREA !S 1 1~' t
J 3 2 ~ • / / oR~ o L 1 3 o LF / 1 1EAIP IEAIPORARY NRN- c 1 ~0
_ Ndw ~ \ y N 1 • / AROUND RIM-13 73 0 or F a. A =1.5 • / ' 00 VACAIEI AROUND EASEMENT TO BE OPEN AREA 1 VACAlEO WHEN SOUNDS/DE DR1VF INCLUDES WATER ACCESS AREA) j
Nq orlh P.P. c ~ C =0.4 256 / 1 , / IS EX1Ei+ IS fXlENUED /N PHASE TWO. 1
+ NF y ~ T~ 10 V.- ' oo ATp N ~N 1 / 1 FE6 15 ]989
FUTURE DEVQOPIIENT 4 LAN D QUALITY SECTION
o ~ 11.3 Z' 39 ti P.P. ~ 85 j0o ~ ~ WALL / I WASHINGTON RE610hfAL OFFICE
N • C a1. •s ' ~ ion' r 134 / ~ 38 .S
RI~1 7 LEGEND Zoo
8>EL. 1 ,~H , / o
F p , s ss32so' w too W 36 , 301.38' 13.5 50 50 4 o ,
• / ~ 1~ 6,11 1~~ ,17' EbS11NG 2BOP05£D EXISTING PROPOSED 1606
w Q60 A = 3.t AC. 0 35 , s
ry _ 0 100 ,14•W C - 0.4 w 34 5 34 LOT NUMBERS BUILDINGS
TC= 1 D MIN. ° ` 5 MOVE EXISTING POWER POLE 0 100 • ~ LIMITS OF DRAINAGE AREA ASPHALT PAVEMENT or Formerly
H PEDESTAL ho= 5.9 IN/HR w 33 Now or Formerly AND TELEP ONE N Q = 7.3 cFS ° 100' CURRITUCK SHORE ~ o TUCK SHORES DITCH . ~ ~ CONCRETE
r4 a o R. H. FERRELL, ET ERRELL ET AL
0 32 1 31 ' SWALE AND FLOW ARROW CONCRETE CURB AND GUTTER
L, ~ 8 100 ~NN...~ EXTENTS OF POSSIBU: WETLANDS ~ STORM SEWER
e
Now or Formerly N i 00' 29 1 - - - BRUSH OR CU:AR CUT TIMBER ? DROP INLET
ARCO 3 RALPH E. B 28 ~ 100 _ _ _ _ PROPERTY ONES OR ~ POWER POLE
c ' SITE STATISTICS 10 80UNDARYS OF ADJOINING
100 ABBREVIATIONS PROPERLY OWNERS - E - OVERHEAD WIRES
~ I. N F5 ~ SPOT ELEVATIONS MOODS UNE ~
14 ~ ~ ALL BUILDING SETBACK LINES SHOWN HIEREON ARE 20 A AREA Z 169 DRAINAGE DITCH NUMBER ~o- CONTOURS
Ac ACRES FEET IN WIDTH UNLESS NOTED OTHERWISE.
C RUN-OFF COEFFlCIENT N NTRANCE q 1~ ALL PROPOSED PAVEMENT SHOWN IS 20' W YNDTH. CE CONSTRUCTIO E ~ 1 ® CONSTRUCTION ENTRANCE 1EMPORARY ROCI( CHECK DAM
CFS CUBIC FEET PER SECOND 12 +
~ CENTER LINE p4 OWNER OF RECORD: INGRESS/EGRESS ON TO GE RALPH E. BARCO CRESS AN TO GENOA COURT
CONC. CONCRETE 103' NORMA S. BARCO lNQPESS/EGRESS ON To ~rI CRESS AV TO MIZZEN COURT
D,I. DROP INLET NFALL INTENSITY ~ P.O. BOX 456
Ilo 10 YR. RAI GRANDY, N.C. 27939 INV. INVERT
LF LINEAR FEET ~ 0 TY N ZONED "A-30'.
P.P. POWER POLE PR PER IS PRESE TLY 1
Q VOLUME FLOW RATE ~ LOTS ARE DESIGNED TO CONTAIN 30.000 S.F. RCP REINFORCED CONCRETE PIPE 1 MINIMUM AREA.
Tc T1ME OF CONCENTRATION
TEL PED. TELEPHONE PEDESTAL 1 ALL DISTANCES SHOWN ARE IN FEET. ~~11111I I III11/1~ DATE:
~ CARD ~ii~
1 TOTAL AREA=54.2f ACRES Q~ ~~i FEB 2, 1989 0 ESSI ~ Avg 9 ~ PHASE ONE
eoGe cl iannnnrn_~e ero~c
!11\L!\ lVUVI YIVLy VTLi !"\VI\L! OPEN AREA REQUIRED=2.71 ACRES SEAL POPLAR BRANCH TOWNSHIPSCAL `
OPEN AREA PROVIDED=2.74 ACRES 15240 1'=100' CURRITUCK COUNTY
NEW R/W AREA=3.446 ACRES
LINEAL FEET OF PROPOSED STREETS=2776 FEET F ibb SCI NEE l~, ~ REV DALE DESCRIP110N BY NORTH CAROLINA DRAMANG NO. ~'Y \
BOUNDARY SHOWN IS THE RESULT OF A CURRENT SURVEY 8). REVISIONS HO(GARDlE1 ASSOCIATES
UNABLE TO MAKE 11E TO NORTH CAROLINA STATE PLANE DINATE SYSTEM. ~~~~III1111111~ 100 0 100 200 Surveyors/Planners/Engmeers CHECKED BY: DRAWN BY: FIELD RELEASE:
(MONUMENTS WITHIN 2000' OF PROPERTY ARE PUBLISHED OS T). NO. Soot 09MO AM BLVD/PO OW tJ1e/~lo )4W9i7o t 2
scale feet MKR RCS/RMM DATE: Portsmouth, Virginia 23703 - OF -
508-88\DRAIN.DWC 508-88
508-88\PRM.SCR FllE NO.

TYPE SEEDING R~?TES SEEC SEEDING DATE LIME & FERTILIZER SEEDING PROCEDU RE MULCHING MAINTENANCE
Rye Grain 120
Rye - 3 BU/AC or Aug Aug. 15 -Dec. 30
~ Wheat - 2 BU/AC Apr Lime: Broadcast or drill seed uniformly and cover 1 1/2 - 2 Tons Mow the seeded ores
/ Q / ~ Spring Oots - 3 ~ AC or 1 Ton Agricultural to a depth of 1/4 inch to approximately 2 inches Small grain to a hie ht of 2 inches
~ Spring Oats - (1 t 2 BU/AC Plus 9 Limestone or (depending on the seed mixture) except where a Straw per acre whenever the avers a hie ht
~ Korean Lespedeza)~ 0 LBS/AC E uivalent r A r g g - q pe c e grain drill is used seed should be covered and Immediately after of grass reaches 4 inches
Lespedeza (Hulled Inoculated) Feb. / c`~ ~ Feb. 1 May 1 the seedbed firmed b the use of a corru ated seedin Y 9 9
~~cQ' p w Sundangross - 30+!40 LBS/AC or Fertilizer: agricultural cultipacker. Seeding implements
/ 5J oP Millet - 30-40 L AC or Q` / 1000 LBS 10-10-10 should be used at right angles to the general
/ Pao ~ Sor hum Cross - ' -40 LBS AC 1. 0 9 / / QJ lp Or Equivalent Per slope to minimize erosion.
~ MI ~ - . ' ' NIM RATE PER ACRE Acre
UM ~ WITHOUT TURF RE~AREMENT
Lime: Seeding may be a hydroseeder or conventional 1 - 2 Tons Straw/AC Irrigate Repair Replace
t ;i~ ° ` 0 200 LBS Tall Fes KY-31 Fall Fall 2 Tons Ground methods with conventional seedings, A culti- or and restore as necessary
~ ~ ~ ~ 2 LBS Lodino Au ~ ~ g Aug, 1 -Nov, 1 Limestone or packer should be used before and after seeding. 1000 LBS Wood to firmly establish
- P~ Z 8 LBS Red Clover Sprit 6 w Spring Equivalent per Acre This is accomplished with aseeder-cultipacker Fibers/AC healthy growth
MI or Feb, NIM Feb, 1 -May 15 combination. or Fertilizer: 43 560' Jute Mat/AC
UM o Z 200 LBS Tall Fes (KY-31) Q 25 LBS Sercea L deza 1000 LBS 10-10-10 or
N o, S ~ For Spring Seddin or Equivalent Per Acre Other protective materials
Fll AR5 ~ ~ as developed by industry
F S RATE PER 1000 FT.
Arc roN w REG F WITH TURF REQUI NT
I 1 FI I AT ~ MIRIF 40 LTER FRAB C E (OR EQUAL) UNDER STONE Feb. Feb. - March
o~ Tall Fescue (KY- - B-10 LBS Sept Sept. -Oct. Seeding And Mulching -Seed and mulch according to N.C. D.O.T.
Standard Specifications for roads and structures and as s ecified herein, P
~ Common Bermudo 2 LBS Sprit Spring
CON I N T E C Z Hulled Seed TANDARD S U 0 EN RANC E S w Mulching -Mulch immediately after seeding is complete. Apply mulch at uniform
NOT TO SCALE Common Berm d 7 BS Z ua L rate completely covering 50% - 75% of seeded area, Mulch required on all soils
Unhulled Seed Fall Q Fall exceeding 25% slope,
~ Tufcote (Bermuda)-
~J Sod Plugs on 1' ers March -July
S ri 7 1 Marc ~ p gs BU/ 000 ft.
Broadcast
~ U - 3 Bermuda ( )
W Sam T Marc e as ufcote March -July
[n
Zoysia (Me et & E ald y ~ Mar March -July
Same as Tufcote c

V. t ry
\ l I
f~ M`
~ • F T,. R, P EROSION' AND SEDIMENT CONTROL MEASURES Y~
Unless otherwise indicated all ve etation and g structural erosion and sediment
control practices will be constructed and maintok~ed according to minimwn
stand ; and specifications of the N.C. D.O.T. Standard lications
For Roa And Structures.
MANAGEI+~NT STRATEGIES do SEQUENCE OF ERO SIGN CONTROL [MEASURES:
_ _ The following sequence of events and erosion control m r -
\L _ _ 7 _ _ _ _ _ easu es shall be incor porated into the construction schedule for this project and shall apply to
~ - - / NOTES FOR ROCK SILT CHECK DAM: all construction activities within the project limits:
_ _ _ _ _ _ _ _ _ ROCK SHALL BE CLASS TRIP-RAP OR STONE FOR EROSION CONTROL (CLASS "B") 1. Tempor~y construction entrance shall be located where traffic will be
H=DISTANCE FROM BOTTOM OF DITCH TO entering or leaving a construction site to or from a public street.
I x LOWEST SIDE OF DITCH BANK. Entrance shall be maintained in a condition which will prevent tracking
T=18' FOR CLASS TRIP-RAP. or flowing of sediment onto public streets or existing pavement. This may require periodic top
~I T=12' MIN. STONE FOR EROSION CONTROL dressing with additional stone as conditions demand and repair and/or cleanout of any measures used to trap sediment. All sediment spilled, dropped, washed or tracked onto
J CLASS 'B". I I ( ) public streets must be removed immediately.
TO BE PAID FOR AT THE CONTRACT UNIT PRICE 2. Temporary check dam is to be placed during clearing and grubbing
PER EACH ROCK SILT CHECK DAM . prior to first phase of construction. ,
3. All storm water management facilities including erosion control stone
are to be installed and made operational within 15 days of the start
SPILLWAY SHALL BE 1' MIN. of clearing operations including approved sediment basins.
BELOW LEVEL ~ LOWEST BANK. 4. The contractor shall complete drainage facilities within thirty (30)
days following the completion of rough grading at any point within the project. 5. All unpaved areas and/or areas disturbed by construction shall be seeded.
SPILLWAY- W MIN. '-0" MIN. ~ 6. All disturbed areas which are not designed for paving, utility or
2 3 STREAM WIDTH 2 structural uses shall not be exposed for longer than 15 days. Vegetative
6"-12" THICK N0.5 cover shall be established as per seeding schedule.
WASHED STONE. 7. Hydroseeding may be used in place of mulching on areas other than ditch
r = L = banks.
8. Periodic inspection and required maintenance must be provided.
MAINTENANCE:
~ ~ In general all erosion and sedimentation control measures shall be checked
after each rainfall or weekly, whichever is most frequent and should be
leaned and repoired according to the following schedule:
1. The sediment tra s will be checked re ularl for sediment clean out. P 9 Y
2. All seeded areas wll be checked regularly to see that a good stand is
maintained. Areas should be fertilized and reseeded as needed.
3. All temporary erosion and sediment control measures shall be disposed
of within 30 days of site stabilization.
NOT TO SCALE
\\\~lll II I II!/~~~ DATE:
0\\ SRO ~~ii
~ ~~i FEB 2, 1989 0 fSsl ~
~ 9. PNac~ nnl~
I lwr ~ SEAL SCALE:
4 _ POPLAR BRANCH TOWNSHIP 152 0 _ NONE
CURRITUCK COUNTY
j
rrH P~~~
[0144MCM DALE DESCRIPTION BY NORTH CAROLINA DRAWING NO. REVISIONS HOGICIAMIELM A880CIATe8 ~~llllllllll~~
BY: ORAWN BY: FIELD RELEASE: Surveyors/Planners/Engineers NO 6006 4ur+o iNJ,PO BM &3M/j o4~-Mn
MKR RMM DATE = 2 - ;C-1 2 OF ?
s,
508-88\EROS.DWC 508-88 Fa.E NO.

f
- - _ -yam-- - ~ ~ • r~ - W=--
C ~ - i WIGGINS MILL RESERVOIR
- - _ ~ - - ~ - _ ~ -~JS _ (TOP OF DAM ELEVATION = 91.5) u
~ ~_g 5~ L i + 98. rat ~r~
~J'\ PERMANENT ~ ~ ~ ~ , - - ~ ,Z, 84"X60" aRCH cMP END THREAD'A'
STAGING ~ ~ ~ ~ ~ - _ ~ ~ - AREA + 97.7 ~ ; ~ r pNV. 68.63) ~ STA. 29+85
+ 9~~ - ~ ~
fa \ ~ ~ CONCRETE BOX WEIR
g~ A + . ~ 93.5 / ~ ~ +98.9 - ~ ~ ~ ~ ~ TOP ELEV. = 92.38
~ + g~7 i _ ~ + 93.5 j ~ - - _ ~
x 1 ~ / i i
-°_w=. ~ ~ UNVEGETATED ~y~. ~ ice, r -~~-cy'~ - ~ - i j %
~ ~ i= AREA y~ ~ I
a ? - 4 N ~ _ -
~ ~a~, ~
~ o
_ - _A, --9 ~ Mi
~ ~ 8 b ~ ''W + 9~.5 ~ v f}_-~_ _ _ _ i~
16 ,ti" 41
o ~ 0 ~~=tN
~ ~ 8 - - \
- Ei } i ,.,ul € ~ ~ P 8 ,t ~ (j/ I I 91.0 ~ 91.0
I ~ ~''1~.`ti s*Po "4"i +91.7 _ 91.5 - 91.5
~ x-r + 94.4 + 94.4 i + _ ---END THREAD B STA. 2 8~ 9i.~~
~ .2'3..° \ 91.0 THREAD'A' STA. 28+49
o a o ' UNVEGETAITED o h +94.4 +91.7 _ ~ '
i AREA ~ ~ 91.5 - '
- 91.0 ~ +91.7 ~
+91.7 91.0 ~ 91.5
~ OVERBANK FLOW ~ +94.4 ~ +91.7
+ 92.5 EXITS CHANNEL ~ 91.5
~ % c~ j -
~ ~ ' ,
rnI rM.'
+ 92. + 92.5 ~ SEEP , ~ s END THREAD D STA. 7 67
END THREAD CSTA. 15+09 = r THREAD'A' STA. 22+71 }
THREAD'A' STA. 20+14 -START THREAD'S' - % G.~
~ STA. 00+00 ~ ' + 92.5
r ~ ~ UNVEGETATED;' _ ~ V
i ~ ~ , 1 AREA ~ ~
- ~1 ~ + 93.4
UNVEGETATED `
s ,9+°° ~ ^a ,~o ~ ~ -AREA
o
~ - 91.0 / -i- jj 91.0 ~ _ - _
r FLOODPLAIN i, ~ t . f~,~ + 91.7 E C ~ ~ t ~ POOL ~ 91.5 91.5 ~ r ~oa_
~ s ~r u i r~ nano s~ _ ~ i
~ a - ? - ~ n~:, o~ri ~ - - F / ~ F t ri ~ ~ ~ S- ,.:~N a
a- r - o ~ n~ WETLANDS 1401 GR P j
\ .A ~ ~ - I ~ 8 ~ t ~ ti ~ t
W ~ 4 ~ _ a APR 01200
i ~ - 10 ~ . Y _ ~ r ~.e z ~
- WATER QUALITY SE ION
5,0 _
~ i o g
S ~ L___
+ 94.5
0 SHA~LO CONCENTRATED
~.~SUR ACE FLOW : a - ~ , ~ . . NV U EGETATED ~
ti~~ ~ ~'n~ AREA 4w / ~~X
-UNVEGETATED \ UNVEGETATED AREA, ~ , i - 'k~?' START THf~EAD D
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JAMES B. HUNT JR.
- . Gowmm
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I JrN(
WAR—
STATE OF NORTH CAROLI-NA
DEPARTMENT OF TRANSPORTATION
P.O. BOX 25201, RALEIGH, N.C. 27611-5201
November 18, 1999
Mr. Mike Bell
U.S. Army Corps of Engineers
Wilmington Regulatory Field Office
Post Office Box 1000
Washington, North Carolina 27889-1000
DAVID MCCOY
SECRETARY
Re: Dismal Swamp Mitigation Site, Gates/Perquimans Counties, TIP Project
R-2208WM
Dear Mr. Bell:
Please find enclosed the As-Built Report for the Dismal Swamp Mitigation Site located
in Gates and Perquimans Counties. The Resident Engineer responsible for this phase of
the project, Mr. S.L. Emory, P.E., has certified that the site was constructed according to
construction plan sheets, with the exceptions noted in this As-Built Report.
For completeness purposes, the following information has been included with the
As-Built Report: (1) Letter of Construction Compliance, (2) As-Built Plan Sheets,
(3) Planting Plan Sheets, and (4) Well Location Map.
If you should have any questions or require additional information, please contact
Charles R. Cox, P.E., Natural Systems Engineer, at [phone], Ext. 301.
Sincerely,
V.C. Bruton, Ph.D., Assistant Manager
Project Development and Environmental
Analysis Branch
VCB/crc
Enclosures
Cc: David Franklin, USACE
John Dorney, DWQ
Doug Huggett, DCM
Lynn Smith, PDEA

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Page 2
May 14, 1999
If any further information is needed, please advise.
Yours very truly,
S. L. Emory, P.
Resident Engineer - Division One
SLE/MRH
Atta.
P.O. Box 828, Ahoskie, NC 27910 [phone] Fax: [phone]
yY

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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR. E. NORRIS TOLSON
GOVERNOR SECRETARY ;
p * t
May 14, 1999
Project: 6.129003T (R-2208WM)
Counties. . , Gates & Perquimans ;
Description: Dismal Swamp Wetland Mitigation (Site Appr9ximately 1.2 Miles
East of Sandy Cross on SR 1002)
Contractor: Barnhill Contracting Company
1304 US 17 South
Elizabeth City, NC 27909
Accepted: October 9, 1998
Subject: , . Final Estimate
Mr. V. C. Bruton, Ph.D, Asst. Manager
Planning and Environmental Branch
North Carolina Department of Transportation
P. O. Box 25201
Raleigh, North Carolina 27611-5201
Dear Mr. Bruton:
I am transmitting a set of As-Built Plans for the above project which consisted of the
Mitigation Site on SR 1002 approximately 1.2 Miles East of Sandy Cross. The As-Built
Plans show changes on the cross-section sheets from. station 18+50 to station 26+50 on
-Yl-. This was the final phase of a purchase order contract.
The date of availability was July 20, 1998. Construction started August 8, 1998 and
was completed on October 9, 1998. The contract completion date was October 30, 1998.
The contractual final estimate over ran the contract 15.58 percent.
There were no liquidated damages assessed for this contract.
t
P.O. Box 828, Ahoskie, NC 27910 [phone] Fax: [phone]
PROJECT: 6.129004T R-2209WM
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JAMES B. HUNT JR.
GOVERNOR
STA7Z
s
JAN 3 p 2ooi
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATIO
„r .. ' DAVID McCoy
SECRETARY
January 29, 2001
Mr. Mike Bell
US Army Corps of Engineers
Washington Regulatory Field Office
P.O. Box 1000
Washington, NC 27889-1000
Dear Mr. Bell:
Subject: 2000 Annual Monitoring Report for the Dismal Swamp Wetland
Mitigation Site, Gates/Perquimans Counties
Please find enclosed the 2000 Annual Monitoring Report for the Dismal Swamp Wetland
Mitigation Site, Gates/Perquimans Counties
This report details the hydrologic and vegetation monitoring activities over the past year
at the sites. Per the attached e-mail from Mr. Scott McLendon, USACE Wilmington, the
Department is in agreement to wait to receive written comments from the regulatory and
resource agencies 30 days after receipt of the reports. A meeting to discuss any
outstanding issues on a site by site basis will be scheduled for March 8, 2001 at the
Transportation Building in Raleigh.
If you should have any questions, please contact Mr. Randy Griffin, Natural Systems
Engineer, or Mr. Phil Harris, PE, Natural Systems Engineer, at [phone]. Thank
you for your continued support and cooperation.
Sincerely,
V. Char es Bruton, Ph.D.,
Assistant Branch Manager
Project Development and Environmental
Analysis Branch
Cc: w/ attachment
file
MAILING ADDRESS: TELEPHONE: [phone] LOCATION:
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS - FAX: [phone] TRANSPORTATION BUILDING
1548 MAIL SERVICE CENTER 1 SOUTH WILMINGTON STREET
RALEIGH NC 27699-1548 WEBSITE. WWW.DOH.DOT.STATE.NC.US RALEIGH, NC
,.
Scott McLendon, USACE (1)
Kelly Williams, NCDCM (2)
John Hennessy, NCDWQ (1)
David Cox, NCWRC (1)
Tom McCartney, USFWS (1)
Ron Sechler, NMFS (1)
w/o attachments
Gordon Cashin, NCDOT
10-
aF } ?
so+AA7p
A
{
JAN 3 0 2001
STATE OF NORTH CAROLINA
K
DEPARTMENT OF TRANSPORTATT
01- B. HUNT JR. ' DAVID MCCOY
JAMES
GOVERNOR SECRETARY
January 29, 2001
Mr. Mike Bell
US Army Corps of Engineers
Washington Regulatory Field Office
P.O. Box 1000
Washington, NC 27889-1000
Dear Mr. Bell:
Subject: 2000 Annual Monitoring Report for the Dismal Swamp Wetland
Mitigation Site, Gates/Perquimans Counties
Please find enclosed the 2000 Annual Monitoring Report for the Dismal Swamp Wetland
Mitigation Site, Gates/Perquimans Counties
This report details the hydrologic and vegetation monitoring activities over the past year
at the sites.. Per the attached e-mail from Mr. Scott McLendon, USACE Wilmington, the
Department is in agreement to wait to receive written comments from the regulatory and
resource agencies 30 days after receipt of the reports. A meeting to discuss any
outstanding issues on a site by site basis will be scheduled for March 8, 2001 at the
Transportation Building in Raleigh.
If you should have any questions, please contact Mr. Randy Griffin, Natural Systems
Engineer, or Mr. Phil Harris, PE, Natural Systems Engineer, at [phone]. Thank
you for your continued support and cooperation.
Sincerely,
V. Char es Bruton, Ph.D.,
Assistant Branch Manager
Project Development and Environmental
Analysis Branch
Cc: w/ attachment
file
MAILING ADDRESS: TELEPHONE: [phone] LOCATION:
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS FAX: [phone] TRANSPORTATION BUILDING
1548 MAIL SERVICE CENTER 1 SOUTH WILMINGTON STREET
RALEIGH NC 27699-1548 WESSITE. WWW. DOH. DOT. STATE. NC. US RALEIGH, NC
? 1 M

JAMES B. HUNT JR.
GOVERNOR
y:
jA% 3 0 2001

d..+SWTFa
y,
ww
STATE OF NORTH CAROLINA -
DEPARTMENT OF TRANSPORTATIO
-- - - DAVID MCCOY
SECRETARY
January 29, 2001
Mr. Mike Bell
US Army Corps of Engineers
Washington Regulatory Field Office
P.O. Box 1000
Washington, NC 27889-1000
Dear Mr. Bell:
Subject: 2000 Annual Monitoring Report for the Dismal Swamp Wetland
Mitigation Site, Gates/Perquimans Counties
Please find enclosed the 2000 Annual Monitoring Report for the Dismal Swamp Wetland
Mitigation Site, Gates/Perquimans Counties
This report details the hydrologic and vegetation monitoring activities over the past year
at the sites. Per the attached e-mail from Mr. Scott McLendon, USACE Wilmington, the
Department is in agreement to wait to receive written comments from the regulatory and
resource agencies 30 days after receipt of the reports. A meeting to discuss any
outstanding issues on a site by site basis will be scheduled for March 8, 2001 at the
Transportation Building in Raleigh.
If you should have any questions, please contact Mr. Randy Griffin, Natural Systems
Engineer, or Mr. Phil Harris, PE, Natural Systems Engineer, at [phone]. Thank
you for your continued support and cooperation.
Sincerely,
V. Char es Bruton, Ph.D.,
Assistant Branch Manager
Project Development and Environmental
Analysis Branch
Cc: w/ attachment
file
MAILING ADDRESS: TELEPHONE: [phone] LOCATION:
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS FAX: [phone] - TRANSPORTATION BUILDING
1548 MAIL SERVICE CENTER - 1 SOUTH WILMINGTON STREET
RALEIGH NC 27699-1548 WEBSITE: WWW.DOH.DOT.STATE.NC.US RALEIGH, NC
A -
Scott McLendon, USACE (1)
Kelly Williams, NCDCM (2)
John Hennessy, NCDWQ (1)
David Cox, NCWRC (1)
Tom McCartney, USFWS (1)
Ron Sechler, NMFS (1)
w/o attachments
Gordon Cashin, NCDOT
Subjectf Mitigation Monitoring Reports
Date: Fri, 5 Jan 2001 17:10:14 -0500
From: [e-mail]
To: [e-mail], [e-mail], [e-mail],
[e-mail], Tom [e-mail]
CC: [e-mail], [e-mail]
Greetings,
As you are aware, NCDOT is in the process of sending the annual mitigation
monitoring reports out to the regulatory and resource agencies. Instead of
bringing our comments to a meeting with NCDOT as we have done in the past, we
have elected to provide our written comments to NCDOT for their review prior to
having any sort of meeting. If any outstanding issues .remain after NCDOT has
had an opportunity to review our comments, we would plan to meet at the
Transportation Building in Raleigh on March 8, 2001.
As there is a time factor involved, we would like to provide our comments back
to NCDOT within 30 days of the receipt of the reports. To that end, a response
via e-mail is perfectly acceptable. Please provide your comments on these
reports to the appropriate NCDOT Project Manager with a copy to me in
Wilmington.
If you have any questions regarding this message, I may be reached at
910-251-4725. Point of Contact at NCDOT is Randy Griffin.
Thanks,
Scott McLendon
1 of 1 01/18/2001 11:19 A
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ANNUAL REPORT FOR 2000
Dismal Swamp Mitigation Site
Gates / Perquimans County
Project No. 6.129003T
TIP No. R-2208 WM
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Prepared By:
Natural Systems Unit & Roadside Environmental Unit
North Carolina Department of Transportation
December 2000
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TABLE OF CONTENTS
SUMMARY ...................................................................................................1
1.0 INTRODUCTION ...................................................................................2
1.1 Project Description ........................................................................2
1.2 Purpose ......................................................................................2
1.3 History ........................................................................................2
2.0 HYDROLOGY .......................................................................................4
2.1 Success Criteria ............................................................................4
2.2 Hydrologic Description ...................................................................4
2.3 Results of Hydrologic Monitoring ......................................................6
2.3.1 Site Data ...........................................................................6
2.3.2 Climatic Data ......................................................................8
2.4 Conclusions ..............................................................................8
3.0 VEGETATION .....................................................................................10
3.1 Success Criteria ..........................................................................10
3.2 Description of Species .................................. .............................10
3.3 Results of Vegetation Monitoring .....................................................11
3.4 Conclusions ...............................................................................13
1 4.0 OVERALL CONCLUSIONS/RECOMMENDATIONS ....................................14

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TABLES
TABLE 1 - EXPECTED SITE CONDITIONS ........................................................4
TABLE 2 - RESULTS OF HYDROLOGIC MONITORING .......................................6
TABLE 3 - VEGETATION MONITORING RESULTS ............................................11
FIGURES
FIGURE 1 - SITE LOCATION MAP ...................................................................3
FIGURE 2 - WELL LOCATION MAP .................................................................5
FIGURE 3 - 2000 HYDROLOGIC MONITORING RESULTS ...................................7
FIGURE 4 - 30-70 PERCENTILE GRAPH ..........................................................9
APPENDICES
APPENDIX A - DEPTH TO GROUNDWATER GRAPHS ......................................15
APPENDIX B - SITE PHOTOS .......................................................................44
APPENDIX C -VEGETATION PLANTING PLAN ...............................................47

SUMMARY
' The following report summarizes the monitoring activities that have occurred in the past
year at the Dismal Swamp Mitigation Site. This site was constructed in 1996.
Monitoring activities in 2000 represent the second year of monitoring. The site must
demonstrate vegetation and hydrological success for a minimum of three consecutive
years.
' The site is monitored with forty-eight vegetation plots, twenty-six groundwater gauges,
one surface gauge and two rain gauges.
' One major change in the hydrologic monitoring process is the installation of an infinity
rain gauge. These gauges were installed because in the past existing on-site rainfall
gauges have proven unreliable. Data recorded by the rain gauge will be used for
comparison to the daily groundwater readings. Daily rainfall recorded at an Elizabeth
City rain gauge, maintained by the NC State Climate Office will be obtained for to
' produce the 30-70-percentile graph.
Hydrologic monitoring indicates that almost the entire site has met success criteria
during the 2000-monitoring year. Nineteen of the twenty-six monitoring gauges met the
hydrologic criteria. The surface water gauge has shown appreciable surface water
throughout the entire growing season. The 30-70-percentile graph indicates relatively
' normal rainfall for the 2000-growing season.
Vegetation monitoring yielded a successful total average tree density of 552 trees per
' acre across the four-planted zones.
Based on the monitoring results from the 2000 season, NCDOT recommends that
monitoring continue.

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1.0 INTRODUCTION
1.1 Project Description
The Dismal Swamp Mitigation Site is located along the Gates and Perquimans County
lines (COE ID # 199401492). It is 1.2 miles east of Sandy Cross on SR 1002 (Folly
Road) (Figure 1). The site encompasses approximately 612 acres of farm and forest
communities.
1.2 Purpose
'
In order to demonstrate success ful mitigation hydrologic and vegetative monitoring
must be conducted for a minimum of three years. The following report details the
results of hydrologic and vegetative monitoring during 2000 at the Dismal Swamp
Mitigation Site.
' 1.3 Project History

1

Summer 1996
Jan.-Feb. 1997
February 1997
March - November 1997
July 1997
November 1997
March - November 1998
October 1998
November 1998
February 1999
March - November 1999
November 1999
March 2000
March - November 2000
October 2000
Grading Construction - Majority of Ditches
Filled; Mowing; Discing
Tree Planting
Monitoring Wells Installed
Hydrologic Monitoring (1 yr.)
Stake Test Plots & Initial Vegetation Monitoring
Vegetation Monitoring (1 yr.)
Hydrologic Monitoring (2 yr.)
Vegetation Monitoring (2 yr.)
Grading Construction - Main Canal Ditch (Phase II)
Tree Planting (Phase II)
Hydrologic Monitoring (1 yr.)
Vegetation Monitoring (Restart)(1 yr.)
Herbicide Treatment
Hydrologic Monitoring (2 yr.)
Vegetation Monitoring (2 yr.)

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Dismal Swamp Wetland Mitigation Site
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2.0 HYDROLOGY
2.1 Success Criteria
Target hydrological characteristics include saturation or inundation within 12 inches of
the surface for at least 12.5% of the growing season at lower landscape positions,
during average climatic conditions. Upper landscape reaches and areas near perimeter
canals may exhibit surface saturation/inundation for between 5% and 12.5% of the
growing season based on well data. These 5%-12.5% areas are expected to support
hydrophytic vegetation within organic soils of low permeability. If wetland parameters
are marginal as indicated by vegetation and hydrology monitoring, consultation with
COE personnel will be undertaken to determine jurisdictional extent in these transitional
areas. One gauge was placed in an upland area where saturation is expected to be
less than 5% of the growing season, in order to aid future delineation of true wetland
area. Table 1 summarizes the wetland criteria expected for each monitoring gauge.
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Table 1
EXPECTED SITE CONDITIONS
Expected Percent of the Growing
Season with Saturated Conditions Monitoring Well Number
12.5% 2, 3, 4, 5, 6, 8, 9, 10, 11, 13, 14, 15, 16,
17, 18, 19, 20, 21, 22, 23, 24, 26
5% to 12.5% 7, 12, 27
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0% to 5% 25
The growing season in Gates County begins March 25 and ends November 11. The
dates correspond to a 50% probability that temperatures will drop to 28° F or lower after
March 25 and before November 11.' The growing season is 232 days; the optimum
duration for wetland hydrology is 29 consecutive days. Local climate must represent
average conditions for the area in order for the hydrologic data to be considered valid.
2.2 Hydrologic Description
Twenty-six groundwater-monitoring gauges, two rain gauges, and one surface water
gauge were installed on site in 1997 (Figure 2). The monitoring gauges record daily
readings of groundwater depth. The rain gauges were replaced in spring 2000 with
infinity rain gauges.
Appendix A contains a plot of the groundwater depth for each monitoring gauge. Data
determined to be erroneous was omitted; therefore, some gaps appear in the plots.
Soil Survey of Gates County, North Carolina, Soil Conservation Service, p.93.
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DISMAL SWAMP MITIGATION SITE
GATES, PERQUIMANS COUNTIES
' I
.W 8
R29
?W9
?W14
? W18?O
WI R28
-------- - .....................
W4
?W7
ow
W10? WII
W12
W15? ?W16 '
?v19? W21
? W20
W22
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77
W23 24p'
? ?W2.5
' ---------------- - - ---- - n W2 ?W27
? GROUNDWATER MONITORING GAUGE (W)
O STREAM GAUGE (S)
O RAIN GAUGE (R)
FIGURE 2: MONITORING GAUGE LOCATIONS
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Precipitation events are included on each graph as bars. The rainfall plotted was
obtained from the on-site infinity rain gauge.
2.3 Results of Hydrologic Monitoring
2.3.1 Site Data
The largest number of consecutive days that the groundwater was within twelve inches
of the surface was determined for each gauge. This number was converted into a
percentage of the 232-day growing season. Table 2 shows the hydrologic results for
the 2000-growing season. Table 2
2000 HYDROLOGIC MONITORING RESULTS \\
Monitoring
Gauge < 5% ` 5% - 8% 8% -12.5%0 > 12.5% Actual % Date
DS-2 ? 91.4 Mar. 25 - Oct. 22
DS-3 ? 14.2 Jul. 25 - Aug. 26
DS-4 ? 12.1 Jul. 25 - Aug. 21
DS-5 ? 21.5 Mar. 25 - May 13
DS-6 ? 21.5 Mar. 25 - May 13
DS-7 ? 5.2 Aug. 28 - Sept. 8
DS-8 ? 88.4 Mar. 25 - Oct. 15
DS-9 ? 89.2 Mar. 25 - Oct. 17
DS-10 ? 24.6 May 17 - Jul. 12
DS-11 ? 66.4 May 21 - Oct. 21
DS-12 ? 12.1 Jul. 25 - Aug. 21
DS-13 ? 8.2 Apr. 15 - May 3
DS-14 ? 12.1 Jul. 24 - Aug. 20
DS-15 ? 90.1 Mar. 25 - Oct. 19
DS-16 ? 25.9 Jul. 20 - Oct. 17
DS-17 ? 99.6 Mar. 25 - Ma 26
DS-18 ? 94.8 Mar. 25 - May 22
DS-19 ? 61.2 Mar. 25 - Aug. 13
DS-20 ? 13.4 Apr. 11 - Ma 11
DS-21 ? 90.1 Mar. 25 - Oct. 19
DS-22 ? 62.1 May 21 - Oct. 11
DS-23 ? 37.5 Jul. 16 -Oct. 10
DS-24 ? 12.5 Jul. 25 - Aug. 22
DS-25 ? 5.3 Aug. 28 - Oct. 8
DS-26 ? 12.9 Jul. 25 - Aug. 23
DS-27 ? 12.1 Jul. 25 - Aug. 21
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DISMAL SWAMP MITIGATION SITE
GATES, PEROUIMANS COUNTIES
SI, W2
¦W3
¦W4 ,
,
®W5 ®W6 MW7
®W9 WIO® WII
W12
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-----------
W17 W18 R28
,
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W19M W21
® W20 W22
3 W24M
NW25
¦ W26 ®W27 '
;-------------------
? <5% HYDROLOGY
® 5% - 8% HYDROLOGY
® 8% - 12.5% HYDROLOGY
I N >12.5% HYDROLOGY

FIGURE 3: 2000 HYDROLOGIC RESULTS
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Gauges 19 and 20 displayed several difficulties during the growing season due to dead
batteries. Each time the batteries were replaced and the gauge reset. Gauge number
20 was removed and replaced during the November download.
Figure 3 is a graphical representation of the 2000 hydrologic results. A blue dot
indicates hydrology for greater than 12.5% of the growing season; a red dot means the
gauge showed between 8% and 12.5%. A green dot indicates hydrology between 5%
and 8% of the season. It is this hydrologic data which will determine the success of the
1 site. The surface water gauge has recorded appreciable surface water throughout the
growing season.
2.3.2 Climatic Data
Figure 4 is a comparison of 1999 and 2000 monthly rainfall to historical precipitation for
the area. The two lines represent the 30th and 70th percentiles of monthly precipitation
for Elizabeth City, NC. These percentiles represent monthly rainfall data collected
between 1931 and 1998 from a National Climatic Data Center rain gauge. The 1999
and 2000 monthly rainfall data was provided by the State Climate Office of North
Carolina at NC State University. Because of data availability, the 2000 rainfall
encompasses precipitation through November 2000. The 2001 annual report will
include a 30-70-percentile graph with the monthly rainfall from November and
December of 2000.
Rainfall for the Elizabeth City vicinity in the past two years ranges from below average
to above average.
2.4 Conclusions
1 The data for the 2000-growing season indicates that nineteen of the twenty-six
monitoring gauges met the success criteria. Gauges 4, 13, and 14 did not meet their
expected hydrologic criteria while many of the gauges met well above expectations.
Gauge number 4 registered within the success criteria for 12.1 % of the 2000-growing
season and has shown significant improvement over the 1999-growing season.
Gauges number 13 and 14 are located along the area where the large canal was filled
in across the middle of the site. Gauge 14 has shown some improvement while gauge
13 continues to meet success criteria only around 8.2% of the growing season. It has
been noted that even though gauge 13 lies near the floodplain area, no ponding is
occurring at this location.
The Dismal Swamp Mitigation Site made large strides in 2000 showing more favorable
hydrologic trends than in 1999. The few exceptions appear to be centralized in specific
areas along the outer perimeter of the site.

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' 3.0 VEGETATION: DISMAL SWAMP MITIGATION SITE

3.1 Success Criteria
NCDOT will monitor the site for five years. 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.
3.2 Description of Species
The following species were planted in the Wetland Restoration Area:
Zone 1: Non-riverine Swamp Forest / Atlantic White Cedar

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(136 acres)
Taxodium distichum, Bald Cypress
Nyssa aquatica, Tupelo Gum
Nyssa sylvatica var. biflora, Swamp Blackgum
Chamaecyparis thyoides, Atlantic White Cedar
Fraxinus pennsylvanica, Green Ash
Quercus laurifolia, Laurel Oak
Quercus falcata var. pagodaefolia, Cherrybark Oak
Quercus michauxii, Swamp Chestnut Oak
Quercus phellos, Willow Oak
Zone 2: Coastal Fringe Sandhill Forest (12 acres)
Nyssa sylvatica, Black Gum
Quercus marilandica, Blackjack Oak
Quercus virginiana, Live Oak
Pinus palustris, Longleaf Pine
Carya tomentosa, Mockernut Hichory
Quercus cocinea, Scarlet Oak
Quercus michauxii, Swamp Chestnut Oak
Quercus laevis, Turkey Oak
Zone 3: Non-riverine Swamp Forest Mineral Soil Subtype
(315 acres)
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I Taxodium distichum, Bald Cypress
Nyssa sylvatica var. biflora, Swamp Blackgum
Chamaecyparis thyoides, Atlantic White Cedar
Fraxinus pennsylvanica, Green Ash
Quercus laurifolia, Laurel Oak
Quercus falcata var. pagodaefolia, Cherrybark Oak
Quercus michauxii, Swamp Chestnut Oak
Quercus phellos, Willow Oak
Liriodendron tulipfera, Yellow Poplar
Zone 4: Riverine Swamp Forest (34 acres)
Taxodium distichum, Bald Cypress
Nyssa aquatica, Tupelo Gum
Nyssa sylvatica var. biflora, Swamp Blackgum
Quercus lyrata, Overcup Oak
Chamaecyparis thyoides, Atlantic White Cedar
Fraxinus pennsylvanica, Green Ash
Quercus laurifolia, Laurel Oak
3.3 Results of Vegetation Monitoring
Table 3

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ZONE 1 13 3 1 6 1 11 3 2 6 1 34 34 680
14 2 4 5 1 7 9 28 30 635
15 2 1 12 1 6 5 27 35 525
16 5 9 8 7 3 32 37 588
23 5 2 11 2 1 21 28 510
24 2 3 1 12 3 9 30 32 638
26 1 3 1 13 3 4 3 28 28 680
31 3 3 14 6 26 34 520
32 4 1 2 20 3 1 31 41 514
33 2 2 2 7 13 1 3 30 33 618
42 7 3 3 3 4 2 6 28 28 680
43 11 18 1 30 38 537
47 5 1 9 2 1 2 20 25 544
ZONE 1 AV ERAGE DE NSIT Y 590
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3.3 Results of Vegetation Monitoring
(Continued)
ZONE 3 1 1 1 15 5 7 1 30 32 638
2 4 3 12 19 29 446
3 13 7 1 21 21 680
4 2 8 8 18 24 510
5 5 6 7 1 1 3 23 31 505
6 3 6 1 3 3 16 28 389
7 2 13 5 2 5 27 31 592
8 5 3 4 1 21 1 2 37 39 645
9 5 3 1 1 10 20 340
10 2 5 1 4 2 1 15 28 364
11 9 2 11 19 394
17 1 14 1 1 8 1 26 29 610
18 4 1 19 7 4 35 35 680
19 3 9 5 2 1 20 32 425
20 2 7 3 4 3 1 1 21 25 571
21 4 4 6 15 1 30 34 600
22 4 2 3 2 9 20 34 400
25 3 6 7 1 2 1 1 1 22 23 650
27 3 3 3 3 2 4 18 25 490
28 1 1 3 2 1 4 12 22 371
30 1 3 3 3 10 1 21 27 529
34 1 4 1 7 1 4 18 36 340
35 2 9 12 1 1 25 27 630
36 11 8 14 2 1 36 42 583
37 5 4 4 2 22 37 37 680
38 5 5 8 8 1 27 30 612
39 5 4 1 5 3 18 22 556
40 7 12 1 2 22 30 499
41 3 3 11 1 2 7 1 28 30 635
48 5 5 2 11 1 1 25 30 567
ZONE 3 AV ERAGE DE NSIT Y 531
To determine tree density, 50' x 50' plots are installed immediately following planting.
The actual number of planted trees which occur within the plot are counted. This
number is equated to the number within each plot, which represents 680 trees per acre
(average). The survival monitoring number is compared to the planted number to
obtain survival percentage. This percentage is applied to the 680 trees per acre to
obtain an estimated tree per acre for the site. (Density = monitoring count / planted
trees x 680)

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I Site Notes:
Zone 1: Other species noted: broomsedge, goldenrod, volunteer pine, red maple,
foxtail, giant foxtail, holly, fennel, juncus and sweetgum. Evidence of standing water in
plot 43. Some deer grazing noted.
Zone 2: Other species noted: broomsedge, goldenrod, volunteer pine (some pond
pine) and sicklepod. Some deer grazing noted.
Zone 3: Other species noted: broomsedge, red maple, volunteer pine (some pond
pine) foxtail, giant foxtail, pokeberry, wild onion, switch grass, baccharis, panicum, giant
cane, goldenrod, horse fennel, woolgrass, juncus, sweet gum and aster. Broomsedge
is throughout zone. There was evidence of standing water in plots 2 and 3 and plot 34
was saturated.
Zone 4: Other species noted: foxtail and some broomsedge. Evidence of standing
water in all zone 4 plots. Few herbaceous species are in this zone.

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3.4 Conclusions
Of the 612 acres on this site, approximately 576 involve tree planting. There were 48
plots established throughout the planting areas, encompassing all plant communities.
The vegetation monitoring resulted in average densities of: zone 1 of 590, zone 2 of
595, zone 3 of 531 and zone 4 of 561 trees per acre, all are well above the success
criteria of 320 trees per acre.
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I 4.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS
The site has shown considerable improvement in the last year in both hydrology and
vegetation. Nineteen of the twenty-six wells met their expected hydrologic criteria
during a year of relatively average rainfall. Vegetation Plots located in both phases of
the planting show high tree survival.
At this time, NCDOT proposes to continue hydrologic and vegetation monitoring of the
site in 2001.

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APPENDIX A
DEPTH TO GROUNDWATER PLOTS
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APPENDIX B
SITE PHOTO
43
DISMAL SWAMP
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APPENDIX C
VEGETATION PLANTING PLAN
46
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O?O?WAT,Ry

June 15, 2005
Gates and Perquimans Counties
DWQ Nos. 94203, 960280, 991270, 95122,
970098,970856,991270
Mr. Philip S. Harris, III, P.E., Manager
North Carolina Department of Transportation
Project Development & Environmental Analysis
Office of Natural Environment
1548 Mail Service Center
Raleigh, North Carolina 27699-1548
RE: Dismal SwampMitigation Site, Gates and Perquimans Counties, TIP No. R-2208WM
Dear Mr. Harris:
This correspondence is in reference to your letter dated July 29, 2004, regarding the Dismal Swamp Mitigation site
located in Gates and Perquimans Counties, North Carolina. This sit6%.is being utilized by the North Carolina
Department of Transportation as compensatory mitigation for the foll?wing projects: R-2208 (A and A
modification), R-2512 (A/B, A/B Modification and B modification), Rt2515A, R-2228A, R-2404B/C, R-2551, K-
4003, SR-1180, SR-1135, and SR Flat Branch.
By copy of this letter, we are notifying you that no further monitoring of the site will be required since the
construction and success criteria for the mitigation site has been met.
Thank you for your time and cooperation. If you have any questions, please contact Nicole Thomson at
919-715-3415.
S' ly,
?T
an W. Klimek, P.E.
JEH/njt
cc: Wilmington District, US Army Corps of Engineers
Mr. Bill Biddlecome, US Army Corps of Engineers, Washington Field Office
Mr. Gary Jordan, USFWS
Mr. Chris Militscher, USEPA
Mr. Travis Wilson, WRC
Mr. Garcy Ward, NCDWQ Washington Regional Office
Mr. Anthony Roper, P.E., Division 1 Engineer, 113 Airport Drive, Suite 100, Edenton, NC 27932
Mr. Clay Willis, Division 1 Environmental Officer, 113 Airport Drive, Suite 100, Edenton, NC 27932
Central Files
File Copy
Nose Carolina
Transportation Permitting Unit AturQ!!rff
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: http://h2o.enr.state.nc.us/ncwetiands
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
.. tia STNEo -
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
MICHAEL F. EASLEY
GOVERNOR
July 29, 2004
Mr. Bill Biddlecombe
Washington Regulatory Field Office ACOE
P.O. Box 1000
Washington, NC 27889-1000
WETLANDS 1401 GROUP
AUG 0:2 2004
WATER QLL4 Tpy
LYNDO TIPPET T
SECRETARY
Re: Dismal Swamp Mitigation Site, Gates/Perquimans Counties, State Project No.
6.129003T, TIP No. R-2208WM (see below for project nos. for site), USACE Action ID Nos.
199401492, 199400991, 199500023, 199504770, 199304571, 199400838, 199706721,
199706722, 199502334; DWQ Project Nos. 94203, 960280, 991270, 95122, 970098, 970856,
991270; CAMA Project Nos. 88-96, 124-95, 89-96, 62-97, 7-98
Dear Mr. Bill Biddlecombe,
As you are aware, the Department has monitored the Dismal Swamp Mitigation Site since its
construction in the summer of 1996. Monitoring was restarted in March of 1999 after phase 2 of
construction work and phase 2 of tree planting. Located in Gates and Perquimans Counties, this
612-acre site is designed to provide non-riverine and riverine restoration along with some
preservation. Hydrologic gauges were installed February 1997 and phase 2 tree planting occurred
February 1999. NCDOT proposed to monitor the Dismal Swamp site for at least five years or
until the success criteria were met; both hydrologic and vegetation monitoring were conducted
each year. After each growing season, annual monitoring reports were submitted to the
appropriate regulatory agencies.
The following roadway projects have been debited from this site: R-2208 (A & Amod); R-2512
(AB, A/B mod, & B mod), R-2515 A, R-2228 A, R-2404 B/C, R-2551, K-4003, SR-1180, SR-
1135, SR Flat Branch.
Hydrologic success criteria stipulated that the site must be inundated or saturated within 12-
inches of the surface for a consecutive 12.5% of the growing season. The growing season is 232
days in New Hanover County; therefore, the criterion is a consecutive 29 days. The Annual
Report for 2003 provides a summary of the hydrologic data (the percentage of the growing
season that saturation was indicated) at each groundwater gauge location for the past five years of
monitoring.
As the summary table in the 2003 Annual Monitoring Report indicates, most of the hydrologic
gauges for this site have been consistently inundated or saturated for the majority of each
growing season since phase 2 of site construction. In the spring of 2002, five surface water
MAILING ADDRESS: TELEPHONE: [phone] LOCATION:
NC DEPARTMENT OF TRANSPORTATION FAX: [phone] PARKER LINCOLN BUILDING
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS 2728 CAPITAL BOULEVARD
1598 MAIL SERVICE CENTER WEBSITE. WWW.NCDOT.ORG RALEIGH NC
RALEIGH NC 27699-1598
gauges were installed to illustrate surface water levels in the riverine area of the mitigation site.
The region has experienced above to below average rainfall. A more detailed analysis of site
hydrologic conditions is provided within each individual annual monitoring report.
After five years of vegetation monitoring, vegetation data for 2003 shows that the site has met
vegetative success criteria by yielding an average density of 463 trees per acre surviving. None of
the four planting zones had a survival density that was below the 5-year requirement. Yearly
monitoring data is provided within the annual monitoring reports submitted between 1998 and
2003.
During the annual monitoring report meeting on April 29, 2004, NCDOT and resource agencies
agreed that the Dismal Swamp Mitigation Site could be closed and that monitoring could be
discontinued. A site review was held on July 27, 2004 with representatives from NCDOT,
CAMA, USCOE, WRC, USFWS, and EPA. It was decided at this site review that the Dismal
Swamp mitigation site could be closed and monitoring discontinued. NCDOT requests that the
appropriate resource agencies provide documentation stating that no further monitoring is
required and that the site is closed. If you have any questions about this project, please contact
Mr. Randy Griffin at [phone].
Sincerely,
Philip S. Harris III, P.E., Manager
PDEA- Office of Natural Environment
cc: Mr. John Hennessy, NCDWQ
Ms. Nicole Thomson, NCDWQ
Mr. Mike Bell, USACOE
Mr. Travis Wilson, WRC
Mr. Chris Militscher; EPA
Mr. Gary Jordan, USFWS
Ms. Lynn Mathis, CAMA
Mr. Steve Sollod, CAMA
Mr. Tommy Douglas, NCDOT
Mr. Freddie Wescott, NCDOT
Mr. Jason Elliot, NCDOT
Mr. Clay Willis, NCDOT
Mr. Ron Sechler, NOAA
9
µSTATpp
?d ?.auy
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
MICHAEL F. EASLEY
GOVERNOR
July 29, 2004
Mr. Bill Biddlecombe
Washington Regulatory Field Office ACOE
P.O. Box 1000
Washington, NC 27889-1000
WETLANDS/ 401 rROUP
AUG 01 2004
WATER QQ'U' SECT10JV
LYNDo TiPPETr
SECRETARY
Re: Dismal Swamp Mitigation Site, Gates/Perquimans Counties, State Project No.
6.129003T, TIP No. R-2208WM (see below for project nos. for site), USACE Action ID Nos.
199401492, 199400991, 199500023, 199504770, 199304571, 199400838, 199706721,
199706722, 199502334; DWQ Project Nos. 94203, 960280, 991270, 95122, 970098, 970856,
991270; CAMA Project Nos. 88-96, 124-95, 89-96, 62-97, 7-98
Dear Mr. Bill Biddlecombe,
As you are aware, the Department has monitored the Dismal Swamp Mitigation Site since its
construction in the summer of 1996: Monitoring was restarted in March of 1999 after phase 2 of
construction work and phase 2 of tree planting. Located in Gates and Perquimans Counties, this
612-acre site is designed to provide non-riverine and riverine. restoration along with some
preservation. Hydrologic gauges were installed February 1997 and phase 2 tree planting occurred
February 1999. NCDOT proposed to monitor the Dismal Swamp site for at least five years or
until the success criteria were met; both hydrologic and vegetation monitoring were conducted
each year. After each growing season, annual monitoring reports were submitted to the
appropriate regulatory agencies.
The following roadway projects have been debited from this site: R-2208 (A & Amod); R-2512
(A/B, A/B mod, & B mod), R-2515 A, R-2228 A, R-2404 B/C, R-2551, K-4003, SR-1180, SR-
1135, SR Flat Branch.
Hydrologic success criteria stipulated that the site must be inundated or saturated within 12-
inches of the surface for a consecutive 12.5% of the growing season. The growing season is 232
days in New Hanover County; therefore, the criterion is a consecutive 29 days. The Annual
Report for 2003 provides a summary of the hydrologic data (the percentage of the growing
season that saturation was indicated) at each groundwater gauge location for the past five years of
monitoring.
As the summary table in the 2003 Annual Monitoring Report indicates, most of the hydrologic
gauges for this site have been consistently inundated or saturated for the majority of each
growing season since phase 2 of site construction. In the spring of 2002, five surface water
MAILING ADDRESS: TELEPHONE: [phone] LOCATION:
NC DEPARTMENT OF TRANSPORTATION FAX: [phone] PARKER LINCOLN BUILDING
PROJECT DEVELOPMENT AND ENVIRONMENTAL ANALYSIS 2728 CAPITAL BOULEVARD
1598 MAIL SERVICE CENTER WEBSITE. WWW.NCDOT.ORG RALEIGH NC
RALEIGH NC 27699-1598
gauges were installed to illustrate surface water levels in the riverine area of the mitigation site.
The region has experienced above to below average rainfall. A more detailed analysis of site
hydrologic conditions is provided within each individual annual monitoring report.
After five years of vegetation monitoring, vegetation data for 2003 shows that the site has met
vegetative success criteria by yielding an average density of 463 trees per acre surviving. None of
the four planting zones had a survival density that was below the 5-year requirement. Yearly
monitoring data is provided within the annual monitoring reports submitted between 1998 and
2003.
During the annual monitoring report meeting on April 29, 2004, NCDOT and resource agencies
agreed that the Dismal Swamp Mitigation Site could be closed and that monitoring could be
discontinued. A site review was held on July 27, 2004 with representatives from NCDOT,
CAMA, USCOE, WRC, USFWS, and EPA. It was decided at this site review that the Dismal
Swamp mitigation site could be closed and monitoring discontinued. NCDOT requests that the
appropriate resource agencies provide documentation stating that no further monitoring is
required and that the site is closed. If you have any questions about this project, please contact
Mr. Randy Griffin at [phone]. '
Sincerely,
l
Philip S. Harris, III, P.E., Manager
PDEA- Office of Natural Environment
cc: Mr. John Hennessy, NCDWQ
Ms. Nicole Thomson, NCDWQ
Mr. Mike Bell, USACOE
Mr. Travis Wilson, WRC
Mr. Chris Militscher, EPA
Mr. Gary Jordan, USFWS
Ms. Lynn Mathis, CAMA
Mr. Steve Sollod, CAMA
Mr. Tommy Douglas, NCDOT
Mr. Freddie Wescott, NCDOT
Mr. Jason Elliot, NCDOT
Mr. Clay Willis, NCDOT
Mr. Ron Sechler, NOAA
ANNUAL REPORT FOR 2001
Dismal Swamp Mitigation Site
Gates / Perquimans County
Project No. 6.129003T
TIP No. R-2208 WM
Prepared By:
Natural Systems Unit & Roadside Environmental Unit
North Carolina Department of Transportation
December 2001
TABLE OF CONTENTS
2001 REPORT -EXECUTIVE SUMMARY .....................................................................1
1.0 INTRODUCTION ....................................................................................................2
1.1 Project Description ..............................................................................................2
1.2 Purpose ............................................................................................................. ..2
1.3 Project History ................................................................................................... ..2
1.4 Debit Ledger ...................................................................................................... ..4
1.5 Permit Related Requirements ........................................................................... ..4
2.0 HYDROLOGY......... .......................................................................................... ..5
2.1 Success Criteria ................................................................................................ ..5
2.2 Hydrologic Description ...................................................................................... ..5
2.3 Results of Hydrologic Monitoring ....................................................................... ..7
2. 3.1 Site Data ...................................................................................................... ..7
2. 3.2 Climatic Data ............................................................................................... ..9
2.4 Conclusions ....................................................................................................... 10
3.0 VEGETATION: DISMAL SWAMP MITIGATION SITE ......................................... 12
3.1 Success Criteria ................................................................................................ 12
3.2 Description of Species ....................................................................................... 12
3.3 Results of Vegetation Monitoring ...................................................................... 14
3.4 Conclusions ....................................................................................................... 16
4.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS .......................................... 16
TABLES
Figure 1. SITE LOCATION MAP ....................................................................................3
Figure 2. GAUGE LOCATION MAP ...............................................................................6
Figure 3. 2001 HYDROLOGIC MONITORING RESULTS ..............................................8
Figure 4. DISMAL SWAMP 30-70 PERCENTILE GRAPH ...........................................11
FIGURES
Table 1. DISMAL SWAMP DEBIT LEDGER .................................................................4
Table 2. EXPECTED SITE CONDITIONS .....................................................................5
Table 3. 2001 HYDROLOGIC MONITORING RESULTS ..............................................7
Table 4. VEGETATION MONITORING RESULTS ......................................................14
APPENDICES
APPENDIX A. DEPTH TO GROUNDWATER GRAPHS
APPENDIX B. SITE PHOTOS
APPENDIX C. VEGETATIVE MONITORING PLAN
11
DISMAL SWAMP MITIGATION SITE
2001 REPORT - EXECUTIVE SUMMARY
The following report summarizes the monitoring activities that have occurred in the past
year at the Dismal Swamp Mitigation Site. Phase 1 of this site was constructed in 1996
and Phase 2 was constructed in 1998. Monitoring activities in 2001 represent the third
year of monitoring. The site must demonstrate vegetation and hydrological success for
a minimum of three years.
The site is monitored with forty-eight vegetation plots, twenty six groundwater gauges,
one surface gauge and two rain gauges. Data recorded by the rain gauge will be used
for comparison to the daily groundwater readings. Daily rainfall recorded at a rain
gauge in Elizabeth City, maintained by the NC State Climate Office, was obtained to
produce the 30-70 percentile graph.
Hydrologic monitoring indicates that less than half of the entire site has met success
criteria during the 2001 monitoring year. Nine of the twenty-six monitoring gauges met
the hydrologic criteria. The surface water gauge has shown surface water throughout
the entire growing season. The 30-70 percentile graph indicates below average rainfall
for the 2001 growing season.
Vegetation monitoring yielded a successful total average tree density of 502 trees per
acre across the four planted zones, which is well above the success criteria of 320
trees per acre.
Based on the inconclusive monitoring results from the 2001 season due to below
average rainfall, NCDOT recommends that monitoring continue for the 2002 season.
1.0 INTRODUCTION
1.1 Project Description
The Dismal Swamp Mitigation Site is located along the Gates and Perquimans County
line (COE ID # 199401492). It is 1.2 miles east of Sandycross on SR 1002 (Folly
Road) (Figure 1). The site encompasses approximately 612 acres of farm and forest
communities.
1.2 Purpose
In order to demonstrate successful mitigation, hydrologic and vegetative monitoring
must be conducted for a minimum of three years. The following report details the
results of hydrologic and vegetative monitoring during 2001 at the Dismal Swamp
Mitigation Site.
1.3 Project History
Summer 1996 1 Grading Construction - Majority of Ditches
January -February 1997
February 1997
March - November 1997
July 1997
November 1997
March - November 1998
October 1998
November 1998
February 1999
March - November 1999
November 1999
March 2000
March - November 2000
October 2000
March - November 2001
September 2001
Filled; Mowing; Discing (Phase 1)
Tree Planting
Monitoring Gauges Installed
Hydrologic Monitoring (1 yr.)
Stake Test Plots & Initial Vegetation Monitoring
Vegetation Monitoring (1 yr.)
Hydrologic Monitoring (2 yr.)
Vegetation Monitoring (2 yr.)
Grading Construction - Main Canal Ditch (Phase 2)
Tree Planting (Phase 2)
Hydrologic Monitoring (Restart 1 yr.)
Vegetation Monitoring (Restart 1 yr.)
Herbicide Treatment
Hydrologic Monitoring (2 yr.)
Vegetation Monitoring (2 yr.)
Hydrologic Monitoring (3 yr.)
Vegetation Monitoring (3 yr.)
2
Figure 1. SITE LOCATION MAP

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1.4 Debit Ledger
Because of its size, Dismal Swamp Mitigation Site will provide mitigation for several
highway projects. Table 1 shows the projects that this site is providing mitigation for
through November 2001.
Table 1. DISMAL SWAMP DEBIT LEDGER
BLH Non-Riverine SPH Riverine Total Acres
Total Acres at Site
TIP Project Debits
R-2208A 485

39.71 58

6.09 543

45.8
R-2512A&B 2.69 8.06 10.75
R-2515A 20.6 - 20.6
R-2228A - 0.88 0.88
R-2512A&B 1.93 - 1.93
R-2404B&C 52.66 4.26 56.92
R-2208A mod 14.93 - 14.93
R-2512B mod 2.39 - 2.39
R-2512A/B mod 3.89 - 3.89
R-2551 - 1.5 1.5
R-2515A
Division Project Debits
Unnamed project 0.46

0.34 -

- 0.46

0.34
SR-1180 0.22 - 0.22
SR-1135 1.4 - 1.4
Remaining Acres at Site 343.78 37.21 380.99
1.5 Permit Related Requirements
There are no additional permit special conditions pertaining to the success criteria of
the site that must be met in order for the site to be deemed successful.
2.0 HYDROLOGY
2.1 Success Criteria
Target hydrological characteristics include saturation or inundation within 12 inches of
the surface for at least 12.5% of the growing season at lower landscape positions,
during average climatic conditions. Upper landscape reaches and areas near
perimeter canals may exhibit surface saturation/inundation for between 5% and 12.5%
of the growing season based on gauge data. These 5%-12.5% areas are expected to
support hydrophytic vegetation within organic soils of low permeability. If wetland
parameters are marginal as indicated by vegetation and hydrology monitoring,
consultation with COE personnel will be undertaken to determine jurisdictional extent in
these transitional areas. One gauge was placed in an upland area where saturation is
expected to be less than 5% of the growing season, in order to aid future delineation of
true wetland area. Table 1 summarizes the wetland criteria expected for each
monitoring gauge.
Table 2. EXPECTED SITE CONDITIONS
Expected Percent of the Growing
Season with Saturated Conditions Monitoring Well Number
> 12.5% 2, 3, 4, 5, 6, 8, 9, 10, 11, 13, 14, 15, 16,
17, 18, 19, 20, 21, 22, 23, 24, 26
5% to 12.5% 7, 12,27
0% to 5% 25
The growing season in Gates County begins March 25 and ends November 11. The
dates correspond to a 50% probability that temperatures will drop to 28° F or lower after
March 25 and before November 11.' The growing season is 232 days; the optimum
duration for wetland hydrology is 29 consecutive days. Local climate must represent
average conditions for the area in order for the hydrologic data to be considered valid.
2.2 Hydrologic Description
Twenty-six groundwater monitoring gauges, two rain gauges, and one surface water
gauge were installed on site in 1997 (Figure 2). The monitoring gauges record daily
readings of groundwater depth. The rain gauges were replaced in spring 2000 with
Infinity rain gauges.
Appendix A contains a plot of the groundwater depth for each monitoring gauge. Data
determined to be erroneous was omitted; therefore, some gaps appear in the plots.
' Soil Survey of Gates County. North Carolina, Soil Conservation Service, p.93.
Figure 2, GAUGE LOCATION MAP
Dl''7)-MAL SWAMP MITIGATION SITE
GATES. PEROUIMANS COUNTIES
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FIGURE 2t MONITORING GAUGE LOCATIONS
6
Precipitation events are included on each graph 'as bars. The rainfall plotted was
obtained from the on-site infinity rain gauge.
2.3 Results of Hydrologic Monitoring
2.3.1 Site Data
The largest number of consecutive days that the groundwater was within twelve inches
of the surface was determined for each gauge. This number was converted into a
percentage of the 232 day growing season. Table 2 shows the hydrologic results for
the 2001 growing season.
Table 3. 2001 HYDROLOGIC MONITORING RESULTS
Monitoring
Gauge < 5% 5%-8% 8%-12.5% ? 12.5% Actual % Date
DS-2 ? 15.5 Mar. 25 - Apr. 29
DS-3 ? 8.6 Mar. 25 -Apr. 13
DS-4 ? 4.7 Mar. 30 - Apr. 9
DS-5 ? 10.8 Mar. 25 -Apr. 18
DS-6 ? 9.9 Mar. 25 -Apr. 16
DS-7^ ? 2.6 Mar. 30 -Apr. 4
DS-8 ? 12.5 Mar. 25 - Apr. 22
DS-9 ? 12.9 Mar. 25 - Apr. 23
DS-1 0* ? 2.2 Mar. 25 - Mar. 29
DS-11 ? 15.1 Mar. 25 - Apr. 28
DS-12^ ? 3.0 Jun. 16 - Jun. 22
DS-13 ? 4.7 Mar. 30 - Apr. 9
DS-14 ? 6.0 Jun. 16 - Jun. 29
DS-15 ? 16.8 Mar. 25 - May 2
DS-16 ? 9.1 Mar. 25 -Apr. 14
DS-17 ? 18.1 Mar. 25 - May 5
DS-18 ? 17.2 Mar. 25 - Ma 3
DS-19 ? 15.9 Mar. 25 - Apr. 30
DS-20 ? 9.1 Mar. 25 - Apr. 14
DS-21 ? 12.5 Mar. 25 - Apr. 22
DS-22 ? 12.1 Mar. 25 - Apr. 21
DS-23 ? 8.6 Mar. 25 -Apr. 13
DS-24 ? 7.3 Mar. 25 -Apr. 10
DS-25** ? 2.6 Mar. 30 - Apr. 4
DS-26 ? 7.3 Mar. 25 - Apr. 7
DS-27^ ? 3.9 Mar. 30 - Apr. 7
*Gauge DS-10 only had 6 days of data collected due to continuous gauge problems. The percentage does not
reflect data from the entire growing season.
"Indicates a gauge with a success requirement of 0-5%.
"Indicates a gauge with a success requirement of 5-12.5%.
Figure 3. 2001 HYDROLOGIC MONITORING RESULTS
DISMAL SWAMP MITIGATION SITE
GATES. PEROUIMANS COUNTIES
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8
Several gauges experienced difficulties during the growing season due to dead
batteries or a malfunctioning gauge. Gauge 1, the surface water gauge, was replaced
in May after data could not be retrieved. There is a gap of data from May 2nd to May
24th due to the replacement of that gauge. Gauge 3 has a missing gap of data from
July 24th to October 4th due to a gauge malfunction. Gauge 8 stopped recording in
September and was replaced in October, therefore, a gap of data from September 10th
to October 4th is missing for this gauge. Gauge 10 had continuous problems
throughout the growing season. The gauge was replaced twice and reset twice, and
the batteries replaced once, however almost no data was collected for the growing
season with a gap of data from March 30th to November 11th. Due to dead batteries,
there is a gap in data from October 5th to November 11th for Gauge 13. There is also
a gap data from October 5th to November 11th for Gauge 22 due to dead batteries.
Gauge 24 also stopped recording in September due to dead batteries, which were
replaced in October. Due to battery problems, data was determined to be erroneous
from August 9th to October 4th.
Figure 3 is a illustration of the 2001 hydrologic results. A blue square indicates
hydrology for greater than 12.5% of the growing season; a red square means the
gauge showed between 8% and 12.5%. A green square indicates hydrology between
5% and 8% of the season. It is this hydrologic data which will determine the success of
the site. The surface water gauge has recorded appreciable surface water throughout
the growing season. Refer to Appendix A for graphed data for all 27 gauges.
2.3.2 Climatic Data
Figure 4 is a comparison of 2000 and 2001 monthly rainfall to historical precipitation for
the area. The two lines represent the 30th and 70th percentiles of monthly precipitation
for Elizabeth City, NC. These percentiles represent monthly rainfall data collected
between 1931 and 1998 from a National Climatic Data Center rain gauge. The 1998
through 2001 monthly rainfall data was provided by the State Climate Office of North
Carolina at NC State University. Because of data availability, the 2001 rainfall
encompasses precipitation through November 26, 2001. The 2002 annual report will
include a 30-70 percentile graph with the monthly rainfall for December of 2001.
Rainfall for the Elizabeth City vicinity in the past two years ranges from below average
to above average. In 2001, 8 of the 11 months of data fell below the 30 - 70 percentile
range with only 1 month, June, being above the range. The gauges that met the
success criteria did not meet only during an above average period of rainfall. Overall,
rainfall was below average for 2001.
2.4 Conclusions
The data for the 2001 growing season indicates that nine of the twenty-six monitoring
gauges met the success criteria for at least 12.5% of the growing season. Fifteen
gauges met the success criteria for at least 8.0 % of the 2001 growing season. Gauges
3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 16, 20, 21, 22, 23, 24, 25, 26, and 27 did not meet their
expected hydrologic criteria. Gauges 4, 7, 10, 12, 13, 14, 24, 25, 26, and 27 did not
meet the success criteria for even 8.0 % of the 2001 growing season. These gauges,
with the exception of gauges 13, and 14, are located on the perimeter of the site. All
nine sites that met the success criteria did so in average or below average rainfall
based on the 30-70 graph (Figure 4). The rainfall did not occur in one large rainfall
event, but over a period of time based on the rainfall gauge data collected. The nine
sites that did meet the success criteria were at a much lower percentage than the 2000
growing season data. For example, Gauge 17 met the success criteria 18.1% of the
growing season, the largest percentage of all the gauges for 2001. This same gauge
met the success criteria 99.6 % of the 2000 growing season. Gauge 12, which was
only marginal in 2000, meeting 12.1% of the growing season, only met 3.0% of the
2001 growing season. The lack of success for this year overall can be attributed to the
below average rainfall for the majority of the growing season.
In the June 13, 2001 Corps of Engineers comments concerning the subject "Mitigation
Monitoring Reports," the statement "it appears that the site may still be under the
influence of artificial drainage" was included regarding the Dismal Swamp Mitigation
Site. NCDOT reviewed the site and did not identify any areas where artificial drainage
was occurring other than the perimeter ditches. These ditches remain in place in order
to prevent hydrologic trespass. NCDOT will further investigate Gauges 13 and 14 to
determine why those areas continue to not be successful, however, based on field
observations, NCDOT does not believe it can be attributed it artificial drainage.
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3.0 VEGETATION: DISMAL SWAMP MITIGATION SITE
(YEAR 3 MONITORING)
3.1 Success Criteria
NCDOT will monitor the site for five years. 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.
3.2 Description of Species
The following species were planted in the Wetland Restoration Area:
Zone 1: Non-riverine Swamp Forest / Atlantic White Cedar
(136 acres)
Taxodium distichum, Baldcypress
Nyssa aquatica, Tupelo Gum
Nyssa sylvatica var. biflora, Swamp Blackgum
Chamaecyparis thyoides, Atlantic White Cedar
Fraxinus pennsylvanica, Green Ash
Quercuslaurifolia, Laurel Oak
Quercus falcata var. pagodaefolia, Cherrybark Oak
Quercus michauxii, Swamp Chestnut Oak
Quercus phellos, Willow Oak
Quercus lyrata, Overcup Oak
Zone 2: Coastal Fringe Sandhill Forest (12 acres)
Nyssa sylvatica, Blackgum
Quercus marilandica, Blackjack Oak
Quercus virginiana, Live Oak
Pinus palustris, Longleaf Pine
Quercus coccinea, Scarlet Oak
Quercus michauxii, Swamp Chestnut Oak
Quercus laevis, Turkey Oak
Quercus laurifolia, Laurel Oak
Quercus phellos, Willow Oak
12
Zone 3: Nan-riverine Swamp Forest Mineral Soil Subtype
(315 acres)
Taxodium distichum, Baldcypress
Nyssa sylvatica var. biflora, Swamp Blackgum
Chamaecyparis thyoides, Atlantic White Cedar
Fraxinus pennsylvanica, Green Ash
Quercus laurifolia, Laurel Oak
Quercus falcata var. pagodaefolia, Cherrybark Oak
Quercus michauxii, Swamp Chestnut Oak
Quercus phellos, Willow Oak
Liriodendron tulipifera, Yellow Poplar
Nyssa sylvatica, Blackgum
Quercus falcata, Southern Red Oak
Zone 4: Riverine Swamp Forest (34 acres)
Taxodium distichum, Baldcypress
Nyssa aquatics, Tupelo Gum
Nyssa sylvatica var. biflora, Swamp Blackgum
Quercus lyrata, Overcup Oak
Chamaecyparis thyoides, Atlantic White Cedar
Fraxinus pennsylvanica, Green Ash
Quercus laurifolia, Laurel Oak
Quercus falcata var. pagodaefolia, Cherrybark Oak
13
3.3 Results of Vegetation Monitoring
Table 4. VEGETATION MONITORING RESULTS

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ZONE 1 13 6 3 1 i t 2 3 1 27 34 540
14 1 2 8 1 6 18 30 408
15 2 1 10 1 6 5 25 35 486
16 5 4 6 1 8 4 2 30 37 551
23 5 3 10 2 20 28 486
24 3 5 1 11 4 .6 30 32 638
26 1 1 2 15 2 4 2 27 28 656
31 2 3 14 3 22 34 440
32 21 2 2 2 27 41 448
33 2 1 3 2 7 12 1 2 30 33 618
42 7 6 2 4 2 4 25 28 607
43 9 18 27 38 483
47 5 9 1 2 17 25 462
ZONE 1 AV ERAGE DE NSITY 525
14
Table 4. VEGETATION MONITORING RESULTS (Continued)
4 1 8 9 18 24 510
5 6 4 9 1 1 2 23 31 505
6 2 3 1 7 28 170
7 3 6 8 2 5 24 31 526
8 4 3 3 1 21 1 33 39 575
9 2 3 1 6 20 204
10 1 5 2 1 4 1 14 28 340
11 8 8 19 286
17 1 13 I 1 8 1 25 29 586
18 2 2 14 7 6 31 35 602
19 2 1 8 5 2 1 19 32 404
20 2 5 5 4 3 1 20 25 544
21 3 4 7 15 29 34 580
22 2 2 5 11 20 34 400
25 3 6 8 2 2 I 22 23 650
27 3 3 2 4 3 4 19 25 517
28 1 2 8 1 12 22 371
30 1 4 6 3 10 1 25 27 630
34 2 1 1 2 3 9 36 170
35 2 10 12 1 1 26 27 655
36 6 2 8 15 2 33 42 534
37 5 4 5 2 22 38 38 680
38 5 8 5 9 1 28 30 635
39 4 4 1 1 5 4 19 22 587
40 7 10 1 2 20 30 45
41 3 4 9 1 2 7
L 26 30 58
48 5 5 2 11 1 E 1 1 24 30 544
ZONE 3 AV ERAGE DENSITY 498
Site Notes:
Zone 1: Other species noted: smartweed, fennel, foxtail, ragweed, goldenrod, red
maple, Juncus sp., switchgrass, cattail, volunteer pine, and bermuda grass. Evidence
of deer browsing.
Zone 2: Other species noted: sweetgum, goldenrod, and volunteer pine. Evidence of
deer browsing.
Zone 3: Other species noted: volunteer pine, fennel, broomsedge, sweet gum, Carex
sp., woolgrass, goldenrod, smartweed, foxtail, red maple, ragweed, various grasses,
15
I TOTAL AVERAGE DENSITY 502
Baccharis halimifolia, Panicum sp., Juncus sp., switchgrass, Aster sp., pokeberry, panic
grass, bermuda grass, and grapevine. Evidence of deer browsing.
Zone 4: Other species noted: switchgrass and smartweed. Evidence of deer browsing.
3.4 Conclusions
Of the 612 acres on this site, approximately 576 involved tree planting. There were 48
plots established throughout the planting areas, encompassing all plant communities.
The 2001 vegetation monitoring revealed average densities of 525 trees per acre for
Zone 1, 538 trees per acre for Zone 2, 498 trees per acre for Zone 3, and 421 trees per
acre for Zone 4. The total density average is 502 trees per acre, which is well above
the success criteria of 320 trees per acre. There was heavy competition noted
throughout the site, which made it difficult to locate the trees.
4.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS
This site has not shown success for the 2001 growing season. However, the data
presented is based on below average rainfall conditions. Because of the continued
improvement this site has shown in the past, NCDOT believes that the below average
rainfall conditions are the reason this site is not showing hydrological success for the
2001 growing season. Vegetation Plots located in both phases of the planting show
high tree survival
At this time, NCDOT proposes to continue hydrologic and vegetation monitoring of the
site for the 2002 growing season.
16
APPENDIX A: DEPTH TO GROUNDWATER GRAPHS
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APPENDIX C: VEGETATIVE MONITORING PLAN
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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT JR. P.O. Box 25201, RALEIGH, N.C. 27611-5201 E. NORRIS TOLSON
GOVERNOR SECRETARY
December 23, 1998
Ms. Cyndi Bell
N.C. Department of Environment
And Natural Resources
Division of Water Quality
4401 Reedy Creek Road
Raleigh, North Carolina 27607
Dear Ms. Bell:
Subject: 1998 Annual Monitoring Report for the Dismal Swamp Mitigation Site,
Perquimmans County.
Please find enclosed the 1998 annual monitoring report for the Dismal Swamp Mitigation
Site.
In January 1999, a representative of the Planning and Environmental Branch will contact
the recipients of each report in order to facilitate a discussion of the annual monitoring
reports.
If you have any questions prior to these discussions, please contact Phil Harris, Natural
Systems Unit, at [phone]. Thank you for your continued support and cooperation.
Sincerely,
C? P Pkllt?
V. Charles Bruton, Ph.D.,
Assistant Branch Manager
Planning and Environmental Branch
cc: Phil Harris, PE, Natural Systems Unit Head
David Franklin, USACOE
t

ANNUAL REPORT FOR 1998
Dismal Swamp Mitigation Site
Gates/ Perquimans Counties
Project # 6.129003T
TIP # R-2208 WM
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1
Prepared By:
Natural Systems Unit
Planning and Environmental Branch
North Carolina Department of Transportation
December 1998
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TABLE OF CONTENTS

1.0 INTR ODUCTION ....................................................................................... 1
1.1

1.2 Project Description
..........................................................................
Purpose . 1

1
1.3 Project History ..................................................................... 1
2.0 HYDROLOGY ............................................................................................ 3
2.1
2.2 Success Criteria ..............................................................................
Hydrologic Description .................................................................... 3
3
2.3 Results of Hydrologic Monitoring ....................................................5
2.3.1 Site Data ...................................................................
2.3.2 Climatic Data.... . 5
9
2.4 Conclusions ........................................................................ 9
3.0 VEGETATION ......................................................................................... 11
3.1 Success Criteria ............................................................................ 11
3.2 Vegetation Description .................................................................. 11
3.3 Results of Vegetative Monitoring ................................................. 12
3.4 Conclusions ......................................................................14
4.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS .............................. 15

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TABLES
TABLE 1 - EXPECTED SITE CONDITIONS .....................................................................3
TABLE 2 -1997 HYDROLOGIC MONITORING RESULTS .........................................5
TABLE 3 - 1998 HYDROLOGIC MONITORING RESULTS .............................6
TABLE 4 - VEGETATION MONITORING RESULTS ...................................13
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FIGURE 1 - SITE LOCATION MAP ...................................................................................2
FIGURE 2 - WELL LOCATION MAP ................................................................................4
FIGURE 3 - 1997 HYDROLOGIC MONITORING RESULTS ..........................7
FIGURE 4 - 1998 HYDROLOGIC MONITORING RESULTS ..........................8
FIGURE 5 - 30-70 PERCENTILE GRAPH .................................................10
APPENDICES
APPENDIX A - DEPTH TO GROUNDWATER PLOTS ......................................16
APPENDIX B - SITE PHOTOS ..........................................................................44
APPENDIX C - MONITORING PARTNERING MEETING MINUTES .............47
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1.0 INTRODUCTION
1.1 Project Description
The Dismal Swamp Mitigation Site is located along the Gates and Perquimans
County line. It is 1.2 miles east of Sandycross on SR 1002 (Folly Road) (Figure
1). The site encompasses approximately 612 acres of farm and forest
communities.
1.2 Purpose
In order to demonstrate successful mitigation, hydrologic and vegetative
monitoring must be conducted for a minimum of three years. The following
report details the results of hydrologic and vegetative monitoring during 1998 at
the Dismal Swamp Mitigation Site. Also included is a consecutive day analysis
of the 1997 hydrologic data. The 1997 hydrologic consecutive day analysis is an
addendum to the 1997 annual report, in which the number of cumulative days
were incorrectly tallied in order to demonstrate success.
1.3 Project History
Summer 1996
Jan.-Feb. 1997
February 1997
July 1997
November 1997
October 1998
November 1998
Grading Construction - Majority of Ditches
Filled; Mowing; Discing
Tree Planting
Monitoring Wells Installed
Stake Test Plots & Initial Vegetation Monitoring
Vegetation Monitoring (1 yr)
Vegetation Monitoring (2 yr)
Grading Construction - Main Canal Ditch
1

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2.0 HYDROLOGY
2.1 Success Criteria
In accordance with federal guidelines for wetland mitigation, target hydrological
characteristics include. saturation or inundation (within 12" of surface) for at least
12.5% of the growing season at lower landscape positions during average
climatic conditions. Upper landscape reaches of wetland restoration areas may
exhibit surface saturation/inundation for between 5% and 12.5% of the growing
season based on well data. Several wells were placed at locations where
saturation is expected to be less than 5% of the growing season, in order to aid
future delineation of true wetland area. Table 1 summarizes the wetland criteria
expected for each monitoring well.
Table 1
EXPECTED SITE CONDITIONS
Expected Percent of the Growing ;
Season with Saturated Conditions "t, Monitoring Well. Number ?

:4%,zmIa
12.5% 2, 5, 6, 7, 8, 9, 10, 11, 19, 20, 21, 22, 23,
24, 25, 27
5% to 12.5% 3,4
0% to 5% 12, 13, 14, 15, 16, 17, 18, 26
The growing season in Gates County begins March 25 and ends November 11.
The dates correspond to a 50% probability that temperatures will drop to 28° F or
lower after March 25 and before November 11.' The growing season is 232
' days; the optimum duration for wetland hydrology is 29 consecutive days. Also
local climate must represent average conditions for the area.
' 2.2 Hydrologic Description
Twenty-six monitoring wells, two rain gauges, and one surface water gauge
were installed on site in 1997 (Figure 2). The monitoring wells and rain gauges
recorded daily readings of depth to groundwater and rainfall, respectively.
' Appendix A contains a plot of the groundwater depth for each monitoring well.
Data determined to be erroneous was omitted; therefore, some gaps appear in
1 the plots. Precipitation events are included on each graph as bars. The rainfall
plotted is the average of the daily rainfall recorded by the two rain gauges.
Soil Survey of Gates County, North Carolina, Soil Conservation Service, p.93.
1 3

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WELL LOCATION MAP

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2.3 Results of Hydrologic Monitoring
2.3.9 Site Data
The largest number of consecutive days that the groundwater was within twelve
inches of the surface was determined for each well. This number was converted
into a percentage of the 232 day growing season. Tables 2 and 3 show the
1997 and 1998 hydrologic results, respectively.
Table 2
1997 HYDROLOGIC MONITORING RESULTS
Monitoring
Well <5% 5%-8% 8%-12.5% > 12.5%
_ ;Actual %
DS-2
DS-3 3.0
DS-4 ? 0.0
DS-5 1.7
DS-6 2.0
DS-7 0.0
DS-8 ? 5.6
DS-9 4.3
DS-10 1.3
DS-11 3.0
DS-12 0.0
DS-13 0.0
DS-14 0.0
DS-15 0.0
DS-16 0.0
DS-17 ? 5.6
DS-18 0.0
DS-19 ? 9.5
DS-20 1.7
DS-21 3.4
DS-22 3.4
DS-23
DS-24 0.9
DS-25 0.0
DS-26 0.0
DS-27 0.9
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Table 3
1998 HYDROLOGIC MONITORING RESULTS
Monitoring
Well < 5% 5%0'- 8% 8%,-12.5% > 12.5% Actual %
DS-2 ? 15.1
DS-3 ? 9.5
DS-4 ? 1.7
DS-5 ? 12.1
DS-6 ? 9.9
DS-7 ? 0.4
DS-8 ? 15.5
DS-9 31.9
DS-10 ? 11.6
DS-11 13.8
DS-12 0.9
DS-13 ? 0.4
DS-14 ? 0.0
DS-15 3.0
DS-16 0.4
DS-17 31.9
DS-18 "
DS-19 37.1
DS-20 9.9
DS-21 12.1
DS-22 9.9
DS-23 14.7
DS-24 3.0
DS-25 0.0
DS-26 3.0
DS-27 1.7
- Denotes wells wnicn mairuncaoneo aunng the growing season; wei? aata ?s incompiete. .
The surface water gauge has recorded no appreciable surface water during the
growing season.
Figures 3 and 4 are graphical representations of the hydrologic monitoring
results for 1997 and 1998, respectively. A blue dot indicates hydrology for
greater than 12.5% of the growing season; a red dot means the well showed
between 8% and 12.5%. A green dot indicates hydrology between 5% and 8%
of the season.
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Figure 4- 1998 Hydrologic Monitoring Result
.........

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2.3.2 Climatic Data
' Figure 5 is a comparison of 1997 and 1998 monthly rainfall to historical
precipitation for the area. The two lines represent the 30th and 70" percentiles of
monthly precipitation for Elizabeth City, NC. These percentiles represent
monthly rainfall data collected between 1966 and 1996 from a National Climatic
Data Center rain gauge.
'
The 1997 and 1998 monthly rainfall data was provided by the State Climate
Office of North Carolina at NC State University. Because of data availability, the
' 1998 rainfall encompasses precipitation through August, 1998. The 1999 annual
report will include a 30-70 percentile graph with the monthly rainfall from the
winter of 1998. Also, data for October of 1997 was unavailable.
With the exceptions of January, February, and August of 1998 and September of
1997, the past two years have produced average to below average rainfall for
the Elizabeth City vicinity.
' 2.4 Conclusions
The data for 1997 indicated that none of the monitoring wells met the 12.5%
criteria. Wells 3 and 4, which were to register between 5% and 12.5%, failed to
meet their expected hydrology. Seven of the eight wells which were expected to
show hydrology less than 5% of the growing season did so. The only exception
being DS-17, which was well above its expected hydrology.

' During the 1998 growing season, seven of the sixteen wells expected to meet
the 12.5% criteria were successful. Of the nine wells which did not meet the
12.5% criteria, six of these wells registered saturation between a consecutive 8%
and 12.5% of the growing season. The remaining four wells (DS-7, DS-24, DS-
25, and DS-27) lie along the perimeter of the mitigation site. Well 3 met its
expected hydrology, falling between 5% and 12.5%, while Well 4 did not meet
the required minimum requirement of 5%. Six of the eight wells expected to
show less than 5% did so. Well 17, which was supposed to show less than 5%,
indicated hydrology for 31.9% of the growing season.
'
For the most part, the Dismal Swamp Mitigation Site made large strides in 1998
showing more favorable hydrologic trends than in 1997. The few exceptions
appear to be centralized in specific areas along the outer perimeter of the site. It
should be mentioned that Phase II construction of the site, which included
plugging and backfilling the main ditch, was not completed until Fall 1998. It is
' for this reason that expectations are high for even better hydrologic success in
1999.
'
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30-70 PERCENTILE GRAPH
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3.0 VEGETATION
3.1 Success Criteria
Success Criteria states that there must be a minimum of 320 trees per acre living
for at least three consecutive years. A minimum of 5 character tree species must
be present, with no more than 20% of any one species is also required and
Loblolly Pine cannot comprise of more than 10% of the 320 trees per acre
requirement.
3.2 Vegetation Description
The following species were planted in the Wetland Restoration Area:
Zone 1: Non-riverine Swamp Forest / Atlantic White Cedar
(136 acres)
Taxodium distichum, Bald Cypress Nyssa aquatica, Tupelo Gum
Nyssa sylvatica var. biflora, Swamp Blackgum
Chamaecyparis thyoides, Atlantic White Cedar
Fraxinus pennsylvanica, Green Ash
' Quercus laurifolia, Laurel Oak
Quercus falcata var. pagodaefolia, Cherrybark Oak
' Quercus michauxii, Swamp Chestnut Oak
Quercus phellos, Willow Oak

Zone 2: Coastal Fringe Sandhill Forest (12 acres)
Nyssa sylvatica, Black Gum
Quercus marilandica, Blackjack Oak
' Quercus virginiana, Live Oak
Pinus palustris, Longleaf Pine
Carya tomentosa, Mockernut Hichory
Quercus cocinea, Scarlet Oak
Quercus michauxii, Swamp Chestnut Oak
Quercus laevis, Turkey Oak

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' Zone 3: Non-riverine Swamp Forest Mineral Soil Subtype
315
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Chamaecyparis thyoides, Atlantic White Cedar
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' Quercus laurifolia, Laurel Oak
Quercus falcata var. pagodaefolia, Cherrybark Oak
Quercus michauxii, Swamp Chestnut Oak
Quercus phellos, Willow Oak
' Liriodendron tulipfera, Yellow Poplar
Zone 4: Riverine Swamp Forest (34 acres)
Taxodium distichum, Bald Cypress
' Nyssa aquatica, Tupelo Gum
Nyssa sylvatica var. biflora, Swamp Blackgum
Quercus lyrata, Overcup Oak
Chamaecyparis thyoides, Atlantic White Cedar
' Fraxinus pennsylvanica, Green Ash
Quercus laurifolia, Laurel Oak
n
1 3.3 Results of Vegetative Monitoring
Table 4 provides the final vegetation counts for 1998.

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Table 4
VEGETATION MONITORING RESULTS

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1 2 1 16 1 6 4 30 32 638
2 3 9 5 12 29 29 680
3 5 7 1 6 19 21 615
4 3 11 2 8 24 24 680
7 1 10 8 3 1 5 1 1 30 31 658
8 4 3 6 1 4 19 2 39 39 680
9 1 1 7 5 3 1 18 20 612
10 4 5 1 5 4 5 4 28 28 680
11 1 1 8 3 13 19 465
12 1 1 3 2 17 24 24 680
13 3 4 3 10 5 1 26 34 520
16 5 4 5 1 9 7 6 37 37 680
17 1 14 1 4 8 1 29 29 680
18 3 3 15 7 3 4 35 35 680
19 3 6 9 1 5 3 2 1 2 32 32 680
20 2 7 4 3 3 3 1 2 25 25 680
23 6 3 1 10 3 1 24 28 583
24 2 5 12 9 3 31 31 680
25 2 6 1 8 3 1 1 1 23 23 680
26 1 1 1 2 1 13 3 2 24 28 583
27 2 3 5 6 1 2 3 2 1 25 25 680
28 3 3 3 9 1 2 1 22 22 680
29 1 2 2 3 1 9 24 255
30 2 9 5 2 2 1 4 1 1 27 27 680
31 3 4 3 4 14 6 34 34 680
34 2 3 17 1 8 31 36 586
35 10 9 1 1 5 26 27 655
36 6 6 6 2 14 1 2 37 42 599
37 5 4 4 1 20 34 34 680
38 5 8 8 5 26 30 589
39 3 3 5 5 4 20 22 618
40 4 8 13 2 1 2 30 30 680
41 3 7 10 1 1 7 1 30 30 680
42 7 1 5 3 4 6 26 28 631
48 5 7 1 11 3 27 30 612
AVERAGE D ENSITY 633
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Many of the plots contain heavy dog fennel and fox-tail. Several of the sites also
contain broom sedge and golden rod. Juncus effusus is also present in many of
the plots.
Phase II will be implemented in the fall of 1998. Planting of the Phase II areas
will take place between January, 1999 and March, 1999. Upon successful
completion of planting, additional plots will be established to incorporate data for
future vegetation monitoring.
1 3.4 Conclusions
' Of the 612 acres on this site, approximately 497 involve tree planting. There
were 35 plots established throughout the planting areas, encompassing all plant
' communities. The second year vegetation monitoring of the Phase I planting
resulted in an average density of 633 trees per acre, well above the 320 trees
per acre as required by the success criteria.
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4.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS
At this time, it is the intention to continue hydrologic and vegetation monitoring of
the site in 1999.
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APPENDIX A

DEPTH TO GROUNDWATER PLOTS

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APPENDIX B
SITE PHOTOS

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APPENDIX C
MONITORING PARTNERING MEETING MINUTES

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STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
JAMES B. HUNT J R. P.O. BOX 25201, RALEIGH. N.C. 27611-5201
GOVERNOR
December 4, 1998
Dr. G. Wayne Wright, Chief
Regulatory Branch
U.S. Army Corps of Engineers
Post Office Box 1890
Wilmington, North Carolina 28402
Dear Wayne:
E. NORRIS TOLSON
SECRETARY
Re: NCDOT/Resource Agency Partnering Meeting - Monitoring Guidelines
A meeting was held on July 22, 1998 in the NCDOT Photogrammetry Conference
Room in Raleigh to discuss monitoring guidelines for the 1998 Annual MonitorinL
Reports. Please find attached a list of those in attendance and the meeting agenda.
Following introductions, Charles Bruton described the purpose of the meeting and
opened the floor to David Franklin for any opening comments. David said he looked
forward to resolving any previous discrepancies in the 1997 Annual Monitoring Reports
and discussing ways to better present monitoring results in this year's monitoring reports.
Phil Harris moderated the meeting.
' HYDROLOGIC MONITORING
NCDOT and the Corps agreed wetland mitigation sites must meet the guideline
for hydrology (1987 Manual) using consecutive days and not cumulative days of the
locally designated growing season. Wetland hydrology criteria in the 1987 Manual notes
that a site must be seasonally inundated or saturated (within 12 inches of the surface)
' greater than 12.5 percent of the local growing season. NCDOT will re-evaluate the 1997
monitoring data to reflect consecutive days rather than cumulative days of the growing
' season.
Regarding monitoring well data, David wants to see compliance is met and that
the sites are working. Phil noted that NCDOT is taking a close look at recurring
h
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i
d
' ere
n cases w
ntenance.
ma
problems associated with monitoring well installation an
hydrology was failing for a particular site, NCDOT would be unable to remediate the site

' until the following year due to seasonal constraints and the necessity to collect specific
ic success
drolo
as considered to be h
t
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ng w
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scuss
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hydrographic information.
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David Franklin said the 1987 Manual was the official guideline. However, he went on to
suggest that the Corps would be interested to see a more detailed breakdown of the well
data and would not be opposed to hydrologic success based on a longer monitoring
period with less than a 12.5 % success criteria. He also mentioned well data that falls
below the 12 inch threshold may also be examined as a special case. Mike Bell suggested
site remediation should occur now rather than waiting until December. NCDOT, in
coordination with the Corps, will identify unsuccessful sites and work together to
determine how the site is failing and the best remediation techniques to implement.
VEGETATION MONITORING ISSUES
Due to NCDOT's demand for hardwood seedlings there is a shortage of seedlings
this year and there was none available for remediation efforts. There is a minimum one
year lead time for ordering seedlings. In a situation on a site where the well data is good
but the vegetation is not successful the Corps stated they would review it on a site by site
basis. In cases of remediation, Charles said it was almost impossible to grade and plant a
site before the winter deadline.
Randy Wise requested an extension of the August/September time period to
obtain the vegetation monitoring data for the sites. After discussing this issue. itvla,
agreed that the marsh sites would be evaluated in August and the hardwood sites could bt'
evaluated as late as October and November before leaf drop. The NCDOT will send a
"blanket" letter to the Corps to modify all permits to reflect the revised vegetation
monitoring period. Phil mentioned that although there would be an extension of the
monitoring period for vegetation, monitoring reports would continue to be completed and
distributed by the end of December. Randy said they often perform random site visits
throughout the year to see how vegetation is performing and would perform supplemental
planting if noted early enough in the growing season.
Ken Jolly asked who was responsible for downloading wells and did they look at
' vegetation. Beth Smyre said the Geotechnical Unit downloaded well data and notified
her of any vegetation issues. The Corps requested that proposed remediation for
' hydrology and vegetation be included in monitoring reports. NCDOT and the Corps will
coordinate any remediation measures. Randy expressed their commitment to remediate
vegetation as soon as possible.
n

The discussion turned toward planted versus volunteer species. The Corps does
not want to see volunteer species included in survival rate calculations for planted
species. Randy noted the survival rate is set at 50% or higher. David wanted to make
sure that the sites meet the target species requirement in stems per acre, not a percentage
(except for older sites set up for percentage). David also wanted to see the distribution of
species planted and volunteer. Randy said it is often difficult to identify certain species
during the first two years (several oak species often look alike as saplings). Generally it
is easier to differentiate the species by the third year. The Corps wanted to know if there
was a way to identify the planted species at planting. However, the planting procedure is

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so labor intensive now it would make it impossible to do so. The 50 foot by 50 foot
' monitoring plots are chosen and staked in the field after planting has occurred. The
Corps wants NCDOT to note the unwanted volunteer species and to identify possible
remediation to make sure these species do not dominate the site. The NCDOT and the
' Corps agreed that the distribution of species is such that no species dominates more than
20 % of the distribution. Red maple and sweet gum are generally not to be planted to
insure good numbers of target species.
' HYDROLOGIC SUCCESS CRITERIA
The incorporation of reference systems in determining success was discussed.
David concluded that if a particular site failed under the 1987 Manual guidelines, then
NCDOT had the option of comparing site parameters to reference site parameters in
' determining success. The purpose of reference systems was to allow NCDOT a second
option in achieving success. The determination of a reference system with its success
' criteria would need to be addressed in the mitigation plan. The use of the
hydrogeomorphic system (HGM) was also discussed. The Corps is not going to use
HGM as a reference system, but will probably look at it as a tool. There are no guidelines
' out yet on HGM.
The use of 20-80 versus 30-70 probability graphs. as defined by WETS. wa,
' discussed. These graphs compare the specific year rain data to the historical data for the
mitigation site area. The NRCS and WETS use the 30-70 probability graphs and
NCDOT would like to use these as well. It was decided to use the 30-70 information and
' to go to the nearest gage station as long as the source was cited. David determined that if
a site's hydrology performs at 12.5%, then hydrologic success has been achieved. If a
site performs in the 5% to 12.5% range, then there is "marginal" hydrologic success. If
' this trend continues, then the entire success criteria for the site will be reviewed.
The target percentage for hydrological success should be included in the permit
' and shown in the mitigation plan. The Corps will be willing to negotiate on the success
of the site, but include adequate information in the permit and the mitigation plan.
' Charles Bruton suggested placing monitoring wells in the impacted wetland areas
to assess and compare to mitigation areas. David wanted to insure that the best
mitigation site attainable is created. David also asked that well performance be broken
out in the report.
' An interim report was given on Mud Creek. It was noted that wells placed in the
reference wetland and wells placed in the created wetland were an inappropriate method
to determine hydrologic success because the difference in soil type, hydrology, and cover
' type.
Mike Bell discussed results of a workshop he attended on monitoring wells. He
' also discussed the use of piezometers.

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There was no further discussion and the meeting adjourned. Please advise if you
have any questions regarding the meeting, minutes, or agenda.
Sincerely,
-??i..<?c
4
V. Charles Bruton, Ph.D.
Assistant Branch Manager
Planning and Environmental Branch
VCB/el
Attachments

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July'_'-, 1998-9:30 Q Century Center in Photographic Conference Room
NCDOT/Resource Agency Partnering Meeting to Discuss Monitoring Issues
AGENDA
Introchictions
Purpose & Goals of Meeting
Standardize the monitoring reports
Ilvclrologic Monitoring
Consecutive vs. Cumulative days
Data interpretation
I'egetation Monitoring Issues
l'ianted vs. Voluntary plants
Monitoring timetrame
Success Criteria
Geographical considerations
Reference systems
monitoring Report Presentation
Text
Figures to be included
Tables
Photographs
Submittal dates
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ANNUAL REPORT FOR 1999
Dismal Swamp Mitigation Site
Gates/ Perquimans Counties
Project No. 6.129003T
TIP No. R-2208 WIVI

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Prepared Bar:
Natural S` stems Unit &
Roadside Environmental Unit
North Carolina Department of Transportation
December 1999

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TABLE OF CONTENTS
SUMMARY ...........................................................................................1
1.0 INTRODUCTION .........................................................................2
1.1 Project Description ..........................................................................2
1.2 Purpose ..........................................................................................2
' 1.3 Project History .....................................................................2
' 2.0 HYDROLOGY ......................................4
2.1 Success Criteria ........................................................................... ...4
2.2 Hydrologic Description .....................................................................4
2.3 Results of Hydrologic Monitoring ....................................................6
2.3.1 Site Data ..................................................................6
2.3.2 Climatic Data ........................................................... ..9
'

2.4 2.3.3 Hurricane Effects

Conclusions ..
...................................................... .9
.
.9
' 3.0 VEGETATION .........................................
3.1 Success Criteria ............................................................................ 11
11
3.2 Description of Species ................................................................... .11
' 3.3
3.4 Results of Vegetation Monitoring ..............:...........::.....::...........:...
Conclusions ...................................... . 12
14
4.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS .............................. .15

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TABLE 1 - EXPECTED SITE CONDITIONS ................................................4
TABLE 2 - RESULTS OF HYDROLOGIC MONITORING ..................................6
TABLE 3 - RESULTS OF HYDROLOGIC MONITORING ................................8
TABLE 4 -VEGETATION MONITORING RESULTS ........................................12
FIGURES
FIGURE 1 - SITE LOCATION MAP .......................................................................3
FIGURE 2 - WELL LOCATION MAP .....................................................................5
FIGURE 3 - 1999 HYDROLOGIC MONITORING RESULTS ...........................7
FIGURE 4 - 30-70 PERCENTILE GRAPH .................................................10
APPENDICES
APPENDIX A - DEPTH TO GROUNDWATER CHARTS ..............................16
APPENDIX B - SITE PHOTOS ...............................................................44
APPENDIX C - VEGETATION PLANTING PLAN .......................................47

1
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I SUMMARY
The following report summarizes the monitoring activities that have occurred in the past
' year at the Dismal Swamp Mitigation Site. This site was constructed in 1996.
Monitoring activities in 1999 represent the third year of monitoring. The site must
demonstrate vegetation and hydrological success for a minimum of three consecutive
' years.
The site is monitored with forty-eight vegetation plots, twenty-six groundwater wells,
' one surface gauge and two rain gauges.
One major change in the hydrologic monitoring process is the use of local weather
station rainfall data for the site analysis. The daily rainfall on the well data graphs is
recorded at an Elizabeth City rain gauge, maintained by the NC State Climate Office.
This data is being used because in the past existing on-site rainfall gauges have proven
' unreliable.. These site gauges will be replaced with more reliable equipment prior to the
start of the 2000 growing season.
Hydrologic monitoring indicates that almost the entire site has met success criteria
during the1999 monitoring year. Twenty of the twenty-six monitoring wells met their
' expected hydrologic criteria even prior to the September hurricanes. The surface water
gauge has shown appreciable surface water throughout the entire growing season.
Ground and surface water levels were greatly affected during the month of September
' by Hurricanes Dennis and Floyd which drenched Elizabeth City with 6.5 and 2.34
inches of rain, respectively. A large storm on October 18 also contributed by dumping
4.92 inches of rain on the area in one day.
Vegetation monitoring yielded a successful average tree density of 560 trees per acre
across the four planted zones.
Based on the monitoring results from the 19
99 season, NCDOT recommends that
' monitoring continue.

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' 1.0 INTRODUCTION
' 1.1 Project Description
' The Dismal Swamp Mitigation Site is located along the Gates and Perquimans County
line (COE ID # 199401492). It is 1.2 miles east of Sandycross on SR 1002 (Folly Road)
' (Figure 1). The site encompasses approximately 612 acres of farm and forest
communities.
' 1.2 Purpose
In order to demonstrate successful mitigation, hydrologic and vegetative monitoring
' must be conducted for a minimum of three years. The following report details. the
results of hydrologic and vegetative monitoring during 1999 at the Dismal Swamp
Mitigation Site.
j
1.3 . Pro
ect History

Summer 1996 Grading Construction - Majority of Ditches
Filled; Mowing; Discing
' Jan.-Feb. 1997 Tree Planting
February 1997 Monitoring Wells Installed
' March - November 1997 Hydrologic Monitoring
July 1997 Stake Test Plots & Initial Vegetation Monitoring
' November 1997 Vegetation Monitoring (1 yr)
March - November 1998 Hydrologic Monitoring
' October 1998 Vegetation Monitoring (2 yr)
November 1998 Grading Construction - Main Canal Ditch
' March - November 1999 Hydrologic Monitoring
November 1999 Vegetation Monitoring (3 yr)
' Phase II Vegetation Monitoring (1 yr)

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110 1997 DeLonne. Street Atlas USA _r? :,>'` •..,<'
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FIGURE 1
SITE LOCATION MAP

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2.0 HYDROLOGY
2.1 Success Criteria
In accordance with federal guidelines for wetland mitigation, target hydrological
characteristics include saturation or inundation (within 12" of surface) for at least 12.5%
of the growing season at lower landscape positions during average climatic conditions.
Upper landscape reaches of wetland restoration areas may exhibit surface
saturation/inundation for between 5% and 12.5% of the growing season based on well
data. Several wells were placed at locations where saturation is expected to be less
than 5% of the growing season, in order to aid future delineation of true wetland area.
Table 1 summarizes the wetland criteria expected for each monitoring well.
Table 1
EXPECTED SITE CONDITIONS
Expected Percent of the Growing
Season with Saturated Conditions Monitoring Well Number
12.5% 2, 5, 6, 7, 8, 9, 10, 11, 19, 20, 21, 22, 23,
24, 25, 27
5% to 12.5% 3,4
0% to 5% 12, 13, 14, 15, 16, 17, 18, 26
The growing season in Gates County begins March 25 and ends November 11. The
dates correspond to a 50% probability that temperatures will drop to 28° F or lower after
March 25 and before November 11.' The growing season is 232 days; the optimum
' duration for wetland hydrology is 29 consecutive days. Local climate must represent
average conditions for the area in order for the hydrologic data to be considered valid.
2.2 Hydrologic Description
Twenty-six groundwater monitoring wells, two rain gauges, and one surface water
gauge were installed on site in 1997 (Figure 2). The monitoring wells record daily
readings of groundwater depth.
' Appendix A contains a plot of the groundwater depth for each monitoring well. Data
determined to be erroneous was omitted; therefore, some gaps appear in the plots.
' Precipitation events are included on each graph as bars. The rainfall plotted was
obtained from the Elizabeth City rain gauge maintained by the State Climate Office of
North Carolina. This official data is used because data from existing site rain gauges
' ' Soil Survey of Gates County, North Carolina, Soil Conservation Service, p.93.

71
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FIGURE 2
WELL LOCATION MAP
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has proved unreliable. A new rain gauge will be installed on the site prior to the start of
the 2000 growing season.
2.3 Results of Hydrologic Monitoring
2.3.1 Site Data
The largest number of consecutive days that the groundwater was within twelve inches
of the surface was determined for each well. This number was converted into a
percentage of the 232-day growing season. Table 2 shows the 1999 hydrologic results
for March 25 through August 31, the months prior to Hurricanes Dennis and Floyd.
Table 2
1999 HYDROLOGIC MONITORING RESULTS - Mar. 25 throuah Aua. 31
Monitoring
Well < 5°yo 5% - 8% 8% - 12.5%0 > 12.5% Actual % Success Dates
DS-2 ? 19.0 Mar. 25 - May 7
DS-3 ? 6.0 Mar. 25 - Apr. 7
DS-4 ? 2.6 Apr. 12 - Apr. 17
DS-5 ? 12.9 Mar. 25 - Apr. 23
DS-6 ? 29.0 Mar. 25 - Apr. 22
DS-7 ? 0 -
DS-8 ? 20.3 Mar. 25 - May 10
DS-9 ? 20.3 Mar. 25 -May 10
DS-10 ? 12.9 Mar. 25 - Apr. 23
DS-11 ? 14.6 Mar. 25 - Apr. 27
DS-12 ? 0 -
DS-13 ? 1.3 Mar. 26 - Mar. 28
DS-14 ? 2.1 Mar. 25 - Mar. 29
DS-15 ? 19.8 Mar. 25 - May 9
DS-16 ? 3.0 Apr. 12 -Apr. 18
DS-17 ? 27.1 Mar. 25 - May 26
DS-18 ? 25.4 Mar. 25 - May 22
DS-19 ? 26.3 Mar. 25 - May 24
DS-20 ? 12.5 Mar. 25 - Apr. 22
DS-21 ? 12.9 Mar. 25 - Apr. 23
DS-22 ? 6.5 Mar. 25 - Apr. 8
DS-23 ? 22.4 Mar. 25 - May 15
DS-24 ? 6.5 Mar. 25 - Apr. 8
DS-25 ? 0 -
DS-26 ? 0 -
DS-27 ? 1.3 Mar. 25 - Mar. 28
6

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' Figure 3 is a graphical representation of the 1999 hydrologic results, as recorded prior
to the September hurricanes. A blue dot indicates hydrology for greater than 12.5% of
' the growing season; a red dot means the well showed between 8% and 12.5%. A
green dot indicates hydrology between 5% and 8% of the season. It is this hydrologic
data which will determine the success of the site. Groundwater levels recorded after
September 1, 1999 were influenced by extreme weather conditions and should not be
used to represent success. Data collected after September 1, 1999 is presented in
' Table 3.

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Table 3
1999 HYDROLOGIC MONITORING RESULTS - Sent. 1 throuah Nov. 11
Monitoring
Well < 5% 5% - 8% 8% - 12.5% > 12.5% Actual % Success Dates
DS-2 ? 29.3 Sept. 5 - Nov. 11
DS-3 ? 15.1 Sept. 5 - Oct. 9
DS-4 ? 9.0 Sept. 5 - Sept. 25
DS-5 ? 17.2 Sept. 5 - Oct. 14
DS-6 ? 16.4 Sept. 5 - Oct. 12
DS-7 ? 6.9 Sept. 7 - Sept. 22-
DS-8 ? 30.2 Sept. 3 - Nov. 11
DS-9 ? 29.3 Sept. 5 -Nov. 11
DS-10 ? 17.7 Sept. 4 - Oct. 14
DS-11 ? 29.3 Sept. 5 - Nov. 11
DS-12 ? 16.4 Sept. 5 - Oct. 23
DS-13 ? 8.2 Sept. 5 - Sept. 23
DS-14 ? 11.6 Sept. 4 - Sept. 30
DS-1 5** ? 34.0 Aug. 25 - Nov 11
DS-1 6** ? 23.7 Aug. 31 - Oct. 24
DS-1 7** ? 35.8 Aug. 21 - Nov. 11
DS-1 8** ? 31.5 Aug. 31 - Nov. 11
DS-19 ? 30.2 Sept. 3 - Nov. 11
DS-20 ? 16.4 Sept. 5 - Oct. 12
DS-21 ? 29.3 Sept. 5 - Nov. 11
DS-22* ? 16.8 Sept. 5 - Oct. 13
DS-23* ? 16.8 Sept. 5 - Oct. 13
DS-24 ? 8.2 Sept. 5 - Sept. 23
DS-25 ? 2.6 Oct. 18 - Oct. 23
DS-26 ? 11.2 Sept. 5 - Sept. 30
DS-27 ? 8.2 Sept. 5 - Sept. 23
- - uenotes wens wnicn ma(runctroned during the growing season; well data is incomplete.
' `**'- Denotes consecutive days beginning before the hurricanes.

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NCDOT realizes that the hydrologic results in the wake of the September hurricanes will
not count toward overall monitoring; however, the reaction of the site to large storms is
noteworthy.
The surface water gauge has recorded appreciable surface water throughout the
growing season.
2.3.2 Climatic Data
Figure 4 is a comparison of 1998 and 1999 monthly rainfall to historical precipitation for
the area. The two lines represent the 30th and 70th percentiles of monthly precipitation
for Elizabeth City, NC. These percentiles represent monthly rainfall data collected
between 1931 and 1996 from a National Climatic Data Center rain gauge. The 1999
monthly rainfall data was provided by the State Climate Office of North Carolina at NC
State University. Because of data availability, the 1999 rainfall encompasses
precipitation through November 1999. The 2000 annual report will include a 30-70
percentile graph with the monthly rainfall from the winter of 1999.
With the exceptions of January and February of 1998 and September and October of
' 1999, the past two years have produced average to below average rainfall for the
Elizabeth City vicinity.
' 2.3.3 Hurricane Effects
' Hurricane Dennis and Hurricane Floyd brought increased amounts of rain to the site
August 31 through September 5 and on September 16, respectively. Four groundwater
wells (MW's 3,12, 16, 22) met the hydrologic criteria only under abnormal conditions
due to precipitation from the hurricanes. The site exhibited increased ground water
levels during the hurricanes and continued to do so until the end of the growing season.
G

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2.4 Conclusions
The data for the 1999 growing season indicated that twenty of the twenty-six monitoring
wells met their respective success criteria. Wells 7, 24, 25, and 27, which were to
register at or above 12.5%, failed to meet their expected hydrology. Well 7 and 27 are
located along the perimeter of the site. Wells 3 and 4, expected to register between 5%
and 12.5%, registered 6.0% and 2.6%, respectively. Groundwater levels rose
significantly during Hurricanes Dennis and Floyd.
The Dismal Swamp Mitigation Site made large strides in 1999 showing more favorable
hydrologic trends than in 1998. The few exceptions appear to be centralized in specific
areas along the outer perimeter of the site. Hydrology was greatly affected by
abnormal climatic conditions during the months of September and October and may be
one reason such improvements were seen in 1999.

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30-70 PERCENTILE GRAPH
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' 3.0 VEGETATION
' 3.1 Success Criteria
' Success Criteria states that there must be a minimum of 320 trees per acre living for at
least three consecutive years. A minimum of 5 character tree species must be present,
' with no more than 20% of any one species is also required. Loblolly Pine cannot
comprise of more than 10% of the 320 trees per acre requirement.
3.2 Description of Species
The following species were planted in the Wetland Restoration Area (see planting plan
' in Appendix C):
Zone 1: Non-riverine Swamp Forest / Atlantic White Cedar
(136 acres)
Taxodium distichum, Bald Cypress
Nyssa aquatica, Tupelo Gum
' Nyssa sylvatica var. bif/ora, Swamp Blackgum
Chamaecyparis thyoides, Atlantic White Cedar
' Fraxinus pennsylvanica, Green Ash
Quercus laurifolia, Laurel Oak
Quercus falcata var. pagodaefolia, Cherrybark Oak
' Quercus michauxii, Swamp Chestnut Oak
Quercus phellos, Willow Oak
Zone 2: Coastal Fringe Sandhill Forest (12 acres)
Nyssa sylvatica, Black Gum
Quercus marilandica, Blackjack Oak
' Quercus virginiana, Live Oak
Pinus palustris, Longleaf Pine
Carya tomentosa, Mockernut Hickory
Quercus cocinea, Scarlet Oak
Quercus michauxii, Swamp Chestnut Oak
' Quercus laevis, Turkey Oak
Zone 3: Non-riverine Swamp Forest Mineral Soil Subtype
(315 acres)
' Taxodium distichum, Bald Cypress
Nyssa sylvatica var. biflora, Swamp Blackgum
' Chamaecyparis thyoides, Atlantic White Cedar
Fraxinus pennsylvanica, Green Ash
Quercus laurifolia, Laurel Oak

11
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Quercus falcata var. pagodaefolia, Cherrybark Oak
Quercus michauxii, Swamp Chestnut Oak
Quercus phellos, Willow Oak
Liriodendron tulipfera, Yellow Poplar
Zone 4: Riverine Swamp Forest (34 acres)
Taxodium distichum, Bald Cypress
Nyssa aquatics, Tupelo Gum
Nyssa sylvatica var. bif/ora, Swamp Blackgum
Quercus lyrata, Overcup Oak
Chamaecyparis thyoides, Atlantic White Cedar
Fraxinus pennsylvanica, Green Ash
Quercus laurifolia, Laurel Oak
3.3 Results of Vegetation Monitoring (3 year)
Table 4
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ZONE 2 AVERAGE DENSITY
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680
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Results of Vegetation Monitoring (3 year)
(Continued)
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ZONE 3 AVERAGE DENSITY
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ZONE 4 AVERAGE DENSITY 4701
TOTAL AVERAGE DENSITY 560
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' To determine tree density, 50'x 50' plots are installed immediately following
planting. The actual numbers of planted trees, which occur within the plot, are
' counted. This number is equated to the number within each plot, which
represents 680 trees per acre (average). The survival monitoring number is
compared to the planted number to obtain survival percentage. This percentage
' is applied to the 680 trees per acre to obtain an estimated tree per acre for the
site.
' Density = monitoring count x 680 (trees per acre)
planted trees
' Notes from Report: Many of the plots contain heavy dog fennel and foxtail.
Several of the sites also contain broom sedge and golden rod. Juncus effusus is
also present in many of the plots. Standing water was found in several plots. A
' few red maple, sweetgum, and volunteer pine were found on the site. Out of 48
plots only Plot 28 did not meet the success criteria due to the difficulty in finding
trees in the thick 10' fennel.
Phase 11 trees were planted February 1999 and thirteen additional plots were
established to incorporate data for vegetation monitoring. A complete planting
' plan is provided in Appendix C.

n

3.4 Conclusions
Of the 612 acres on this site, approximately 576 involve tree planting. There
were 48 plots established throughout the planting areas, encompassing all plant
communities. The third year vegetation monitoring of the Phase I planting and
the first year vegetation monitoring of Phase II resulted in an average density of
560 trees per acre, well above the 320 trees per acre as required by the success
criteria.
14

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4.0 OVERALL CONCLUSIONS/ RECOMMENDATIONS
' The site has shown considerable improvement in the last year in both hydrology
and vegetation. Twenty. of the twenty-six wells met their expected hydrologic
criteria even prior to the hurricanes in September. Transects located in both
phases of the planting show high tree survival.
' At this time, it is the intention to continue hydrologic and vegetation monitoring of
the site in 2000.

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APPENDIX A
DEPTH TO GROUNDWATER PLOTS
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APPENDIX B
SITE PHOTOS
44

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North
4 facing NW

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Photo Point 5 facing NE
1999

7

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APPENDIX C
VEGETATION PLANTING PLAN
47

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