20210034 Ver 2_File 1 - 2nd Submittal to DWR Complete Package Final_20211103

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Civil&Environmental Consultants,Inc.
March 31, 2021
Ms. Donna Hood
North Carolina Division of Water Resources
Environmental Sr. Specialist
610 East Center Avenue, Suite 301,
Mooresville,NC 28115
Dear Ms. Hood:
Subject: City of Hickory—Startown/Robinson Road Connectors
NCDWQ Project ID #20210034
CEC Project 303-168
Based upon comments provided for the USACE PCN application for the City of Hickory,
Startown/Robinson Road Connectors project on February 22, 2021, CEC is providing the
following responses and corresponding exhibits: (Comment is Italic and responses below).
1. Require Class II rip rap outlet protection on the stream culverts.
- All rip-rap aprons have been revised to Class II rip-rap. See Wetlands and Surface
Water Impacts Permit Drawings page 4.
2. Double barrel culverts -Install one culvert at ]-foot below stream level for normal flow
and one higher for storm flow.
- Western most 72" CMP Culvert has been raised to match existing ground, while
the eastern most culvert is indicating an invert depth of 1 foot below nominal
stream invert. See Wetlands and Surface Water Impacts Permit Drawings page 4
& 5.
3. Field study will be required for the dwarf-flowered heartleaf.
- On March 4, 2021, CEC Ecologist Jesse Degnan performed an initial species-
specific survey for dwarf-flowered heartleaf (Hexastylis naniflora) within the
Project limits of disturbance (LOD) at the Lutz Road and Eller Drive stream
crossing locations. Mr. Degnan has received training through the Natural Heritage
Program and Catawba Lands Conservancy for this species and has extensive
experience in identifying previously undocumented populations of dwarf-flowered
heartleaf and performing transplants.During the initial survey,Mr. Degnan flagged
12 locations where he observed a species of the genus Hexastylis within the Project
LOD,along the northeast-facing slope located above the west bank of Muddy Creek
(see attached photographic log). The species could not be positively identified at
that time, however, as the flowers had not yet developed. No additional Hexastylis
plants were observed on the east side of Muddy Creek nor within the LOD of the
Lutz Road creek crossing.
3701 Arco Corporate Drive, Suite 400 1 Charlotte, NC 28273 1 p: 980-237-0373 f: 980-237-0372 1 www.cecinc.com

Ms. Donna Hood—NCDWQ
CEC Project 303-168
Page 2
March 31, 2021
On March 22, 2021, Mr. Degnan conducted a second species-specific survey and
identified the plants at the flagged locations within the Eller Drive Project LOD as
Hexastylis naniflora. A Trimble Geo7X Global Positioning System (GPS) capable
of sub-meter accuracy was utilized to record the locations of these plants. A single
GPS location was recorded at the center of cluster (i.e., multiple plant stems)
groupings (i.e.,more than one cluster) located in close proximity(two to three feet)
to each other. The locations of dwarf-flowered heartleaf clusters and individual
stems located greater than three (3) feet from another cluster or individual were
recorded individually. Cluster groupings, individual clusters, and individual plants
received a unique observation location identification number. A total of seven (7)
locations were recorded(See Exhibit A, Table 1; Exhibit B, Table 2).
Tables 1 and 2(Exhibits A and B,respectively)reflect the total number of observed
clusters and stems per observation location, the percentage of the total population
that each record represents, and anticipated impact calculations per design plan.
Based on the Project's original design plans (Exhibit A), 100% of the dwarf-
flowered heartleaf plants identified within the Project LOD would be impacted
(Table 1). To avoid and minimize impacts to this population, CEC developed a
second design,which is the preferred alternative (Exhibit B) due to the presence of
the dwarf-flowered heartleaf. Based on the preferred alternative design,the Project
will impact one (1) dwarf-flowered heartleaf stem. The impact is unavoidable due
to roadway grading requirements, and will affect approximately 1.32% of the total
population identified with the Project LOD (Exhibit B, Table 2).
4. Indicate deck drain locations for the proposed bridge- Do not discharge water onto the
creek banks or directly into the water.
- Stormwater within the street cross section is being captured by two proposed curb
inlet structures located on the upper side of the bridge. See bridge study. No
scuppers will be required along the bridge deck section over Muddy Creek. See
Deck Drainage Calculations within the attached Bridge Study document for
reference.
S. Coordinate with the City of Hickory Stormwater requirements— Will they require a
permanent stormwater measure at each location to treat the water prior to entering the
stream?
- CEC has coordinated with Kelly Winkler(City of Hickory—Senior Stormwater
Engineer) who requested we add a level spreader to the end of all storm pipe
network outfalls. One level spreader for the culvert crossing at Lutz Blvd and one
for the bridge crossing at Eller Drive has been added to the design plans to
prevent direct stormwater discharge directly into the stream. The proposed level
spreader will provide a level of treatment prior to discharge including additional
measures to promote groundwater recharge with the sand media and underdrain
system. See Bridge Study& Wetlands and Surface Water Impacts Permit
Drawings.
Civil & Environmental Consultants, Inc.

Ms. Donna Hood—NCDWQ
CEC Project 303-168
Page 3
March 31, 2021
Attachments:
- Exhibit A, Endangered Species Study (Original Design Prior to Species Field
Study)
- Exhibit B, Endangered Species Study (Avoidance & Minimization to Impacts
Design (Preferred Design))
- Endangered Species Study Photo Log
- Bridge Study- Eller Drive Connector over Muddy Creek
- Wetlands and Surface Water Impacts Permit Drawings
Should you have any questions or require any additional information in support of this application,
please do not hesitate to contact me at 980-237-0373.
Sincerely,
CIVIL & ENVIRONMENTAL CONSULTANTS, INC.
Shad Walters, PE Andre Lennon, PE
Vice President Senior Project Manager
Cc: Shawn Pennell, City of Hickory
Kevin Thomas, CEC
Krysta Stygar, USACE
Civil & Environmental Consultants, Inc.

PROJECT REFERENCE NO. SHEET NO.
303-168 A
R/W SHEET NO.
ROADWAY DESIGN
ENGINEER
�4 PROPOSED 4"0 FRENCH DRAIN WITH
CLASS II RIPRAP APRON CLEANOUTS IN BOTTOM OF LEVEL SPREADER
2� ID.STONE SIZE= 61N FRENCH DRAIN INV: 870.75
�� MIN.DEPTH= 13.5IN
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PROPOSED LEVEL SPREADER
PROPOSED 40 LF OF 4"0 SCH 40 I BOTTOM ELEVATION=873.50
PVC O 1.00%FROM FRENCH DRAIN RIPRAP BERM ELEVATION=875.50
TO DAYLIGHT I I RIPRAP BERM D50 STONE SIZE= 121N
I DOCUMENT NOT CONSIDERED FINAL
UNLESS ALL SIGNATURES COMPLETED
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�4 D.STONE SIZE-61N
GOT veazazm KK^eao-mss-z
MIN.DEPTH— 121N
/ _v �7 / I ,I HYDRAULIC INFORMAITON
OBSERVATION POINT OF ENDANGERED SPECIES FIELD STUDY(TYP.)
SEE TABLE1THIS SHEET FOR DETAILS /ALL CLUSTERS ARE ARE ANTICIPATED TO BE IMPACTED BY EX. OPENING = N A
SECTIONFLARRED ENDFES 00 I 5 ��7!
CONSTRUCTION TYPICAL THIS PLAN PRO. OPENING = 592 SF
INV.(18')-873.50 J ( I
2 APPROXIMATE Q25 = 600 CFS
� ( PROPOSED LIMITS I "'� 0100 = 865 CFS
OUT TO OUT / \ I +
'-1�"O / l OF DISTURBANCE \
v 79 o q d� ��
EX. 100-YR W.S.E. = 872.00'
l �/ 76'-0"q BRG.TO q BRG. - O� ,
15'-0^ /i� m s PRO. 100-YR W.S.E. = 872.01'
APPROACH SLAB \1 /� APPROA H SLAB , 0 7 �/
�_� �d� \ ABBREVIATION LEGEND
72'-1 CLEAR SPAN_ 7,g. -- 6 ' 'CURB INLET(CQ-�_
�77
- `8" 201 RIM-879.94 BRG.=BEARING
-- ----- INV.IN(18"NW)-874.25 B.S.E.=BEARING SEAT ELEVATION
a INV.OUT(18"SE)=874.06
� �- APPR.=APPROACH
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a O FILL FACE 04
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y S 49'22'24"W 2+0o END BENT�3+00 / /��4 22.24"W �n y 01 g / 4+0a �� 880 \\ 5+OP rL=CENTERLINE
_- - - + - - - _.o STA.AHEAD- m o
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ry W -+ / W.S.E.-WATER SURFACE ELEVATION
TYP.=TYPICAL
ELEV.=ELEVATION
FILL LL BA O off v -V V FIX. FIXED
END BENT EXP. EXPAN
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C
xx x a PROPOSED DECK / - 1
E STRUCTURE WILL NOT 17 �' \ \ �\ \ \ / �_� - �� EX.MINOR CONTOUR
_ LEGEND
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\ \ I J aT>''E � ----- EX.MAJOR CONTOUR
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CURB INLET(CI)
AW / RIM-879.94 202 \ I O EDGE OF ELK CREEK
h X
112 OUT(18"SE)=874.50 \ EX.OVERHEAD WIRE
LIMITS OF DISTURBANCE
PROPOSED ELLER
DRIVE/SHORT ROAD x�1 OBSERVATION POINT
1 CONNECTION
STORM DRAINAGE STRUCTURE
� !TTE2NK:j= STORM DRAINAGE PIPING
PLAN VIEW TABLE 1
SCALE: ,"= 20• HEXASTYLIS NANIFLORA
g (DWARF-FLOWERED HEARTLEAF)
NUMBER OF APPROXIMATE PERCENTAGE ALTERNATE
OBSERVATION CLUSTERS PER POINT ID# OBSERVATION NUMBER OF OF TOTAL DESIGN WILL
e LOCATION STEMS POPULATION OBSERVEDIMPACT PLANT?
900 900
1 2 12 15.79% Y
890 9-1a"0/0 BRIDGE L GTH 890 2 2 12 15.79% Y
_ PROPOSW
APPR.SLAB STORM
p_ APPR.SLAB STRUCTURE 3 3 14 18.42% Y
d 880 PROFILE GRADE 880
g +3.68 4 2 32 42.11% Y
_ —FILL FACE O
g7p tE
FACE O %:1 SLOPE END BENT 1 5 1 3 3.95% Y
D BENT 1 - 1Xz:1 SLOPE NORMAL TO CAP STA.3+88.47 alp
3+09.31 tty,�, NORMAL TO CAP B/F EL 872.15
38"R LLED � 6 1 2 2.63% Y
860 B/F EL 868.97 BEAM I o_ 860
7 1 1 1.32% Y
—
o, EX
ISTING 850 CP� TOTALS 12 76 100.00% (IMPACTS)
FOUNDATION
840 P(TR�OT)CTION aao FIELD STUDY FOR ENDANGERED SPECIES PERFORMED
BY CEC ON MARCH 4, 2021 & MARCH 22, 2021.
830 830
2+50 2+60 2+70 2+80 2+90 3+00 3+10 3+20 3+30 3+40 3+50 3+60 3+70 3+80 3+90 4+00 4+10 4+20 4+30 4+40 4+50
ENDANGERED SPECIES STUDY
SECTION ALONG-Y- FOR
SCALE: r = 20' ELLER DRIVE/SHORT ROAD CONNECTOR
CREEK CROSSING
ORIGINAL DESIGN PRIOR TO EXHIBIT
SPECIES FIELD STUDY A

PROJECT REFERENCE NO. SHEET NO.
ALTERNATIVE#2 EXNIBIT 303-168 B
R/W SHEET NO.
ROADWAY DESIGN
ENGINEER
PROPOSED ORANGE
MCP N J CONSTRUCTION FENCE-
��� ESTABLISHED TO CREATE
A PROTECTED BUFFER
� AROUND EXISTING DWARF HEARREAF PLANTS( I�4
OBSERVATION POINT OF ENDANGERED/ I SPECIES FIELD STUDY(TIP.)I -SEE TABLE 2 THIS SHEET FOR DETAILS
DOCUMENT NOT CONSIDERED FINAL
UNLESS ALL SIGNATURES COMPLETED
iAl I +_J APPRoxIMATE � — ���
2 PROPOSED LIMITS
}� -/ OF DISTURBANCE I \�
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1 PROPOSED IMPACT .. uc
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15' -/ TO CLUSTER J7 ` seo-zz�mro eao-zssa
APPROACH
aom
HYDRAULIC INFORMAITON
15'—G^ i EX. OPENING = N/A
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o
FILL FACE O w �' / \ I Q25 = 600 CFS
END BENT 1 r/� j F vl / /
s a9zz'za"w +oo }oo a zz'za'w a n 5 1 a+oo 551 \\ s+oo = 865 CFS
-- _ —_2 = AHEAD — \ _ / "+'100
a 5 EX. 100—YR W.S.E. = 872.00'
_ FILL FACE O �. PRO. 100—YR W.S.E. = 872.01'
ABBREVIATION LEGEND
-
- BRG.=BEARING
—x—�-- �0 - - - --- B.S.E.-BEARING SEAT ELEVATION
>; xxxx max; o — —\
n � \ kry� APPR.=APPROACH
m y — y .' '10 \ 202 CURB INLET(CI)., ��---_'_-
0 6 �0 RIM=879.94` - _--- ABUT.=ABUTMENT
ZO PROPOSED DECK �0 0 / \/�\ INV.OUT(18`N)=873.61 ----- \
STRUCTURE WILL NOT N FLPRRED END -'��-fir - ---'r\_ rL=CENTERLINE
D REQUIRE DECK DRAINS / / / SECTION(FES) /
h W / 200 INV.(187-871.50 I I // \ W.S.E.=WATER SURFACE ELEVATION
2I PROPOSED LEVEL SPREADER / / r TYP.=TYPICAL
x RIPRAP BERM D50 STONE SIZE= 121N
/ / --- ELEV.-ELEVATION
'RIP-RAP DISSIPATOR
CO �
L= 14FT PROPOSED ELLER FIX. -FIXED
I --- /'\W= 16FT - \ DRIVE/SHORT ROAD
STONE SIZE=61N EXP. -EXPANSION
Dso CONNECTION
Y / �MIN.DEPTH= 121N
" I i
�-- koos LEGEND
EX. MINOR CONTOUR
x
I I Il
o
EX. MAJOR CONTOUR
CO
I CLASS II RIPRAP APRON /// i / RIPRAP
I ID5oSTONE SIZE MIN =61N
I MIN.DEPTH= 13.5IN EDGE OF ELK CREEK
PROPOSED 4"0 FRENCH DRAIN WITH OH-E EX.OVERHEAD WIRE
CLEANOUTS IN BOTTOM OF LEVEL SPREADER
OCF ORANGE CONSTRUCTION FENCE
eI — UMTS OF DISTURBANCE
PROPOSED 40 LF OF 40
PVC O 1.00%FROM FRENCH
DRAIN CO X-_1 OBSERVATION POINT
TO DAYLIGHT \
k ® STORM DRAINAGE STRUCTURE
/ STORM DRAINAGE PIPING
PLAN VIEW
SCALE: 1"= 20' TABLE 2
HEXASTYLIS NANIFLORA
(DWARF-FLOWERED HEARTLEAF)
NUMBER OF APPROXIMATE PERCENTAGE ALTERNATE
OBSERVATION CLUSTERS PER NUMBER OF OF TOTAL DESIGN WILL
e POINT ID# OBSERVATION POPULATION
LOCATION STEMS OBSERVED IMPACT PLANT?
900 900 1 2 12 15.79% Y
890 9'-1a`0/0 BRIDGE L GTH PROPOSED 890 2 2 12 15.79% Y
_ STORM
p� APPR.SLAB APPR.SLAB STRUCTURE 3 3 14 18.42% Y
d 880 PROFILE GRADE 880
g +3.68 4 2 32 42.11% Y
_ -FILL FACE O
g7p FILL FACE O 1JS:1 SLOPE END BENT 1 870 5 1 3 3.95% Y
END BENT 1 - 1Xz:1 SLOPE NORMAL TO CAP STA.3+88.47
STA.3+09.31 tty,�, NORMAL T- CAP B/F EL 872.15 6 1 2 2.63% Y
- 36`ROLLED
860 B/F EL 868.97 BEAM I o_ 860 7 1 1 1.32% Y
'-0" RMALEXISTING
1.32%
850 CAP ) o, GROUND M Sso TOTALS 12 76 100.00% (IMPACTS)
FOUNDATION
840 PROTECTION 840 FIELD STUDY FOR ENDANGERED SPECIES PERFORMED
') BY CEC ON MARCH 4, 2021 & MARCH 22, 2021.
830 830
2+50 2+60 2+70 2+80 2+90 3+00 3+10 3+20 3+30 3+40 3+50 3+60 3+70 3+80 3+90 4+00 4+10 4+20 4+30 4+40 4+50
ENDANGERED SPECIES STUDY
FOR
SECTION ALONG-Y-
SCALE: 1"= 20' ELLER DRIVE/SHORT ROAD CONNECTOR
CREEK CROSSING
AVOIDANCE & MINIMIZATION TO EXHIBIT
IMPACTS DESIGN B
(PREFERRED DESIGN)

Photo Number: 1
\` y_
Date: 3/4/2021
,v ` Description:
z.
General vegetative conditions along slope
k,
,. where dwarf-flowered heartleaf was
identified. Photo taken facing east along
north-facing slope.
4
Photo Number: 2
r Date: 3/22/2021
:r Description:
Facing south toward dwarf-flowered
heartleaf observation location number 3.
o' Each distinct cluster was flagged. A single
GPS location was recorded in the center of
cluster groupings where the distances
between individual clusters was
approximately two to three feet. Individual
'wf - plants or clusters separated by a distance
i exceeding approximately three feet
received a unique observation location
number.
Y�
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Civil & Environmental Consultants, Inc.
Charlotte,NC
Phone [phone] • Toll Free: 855/859-9932 www.cecinc.com
1 1 P a g e

Photo Number: 3
A s Date: 3/22/2021
Description:
Plants observed at observation location
number 4.
R 4
;\drefd ".
I 1
Photo Number: 4
Date: 3/22/2021
` Description:
Flowers observed at observation location
F number 4.
iY.
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Civil & Environmental Consultants, Inc.
Charlotte,NC
Phone [phone] • Toll Free: 855/859-9932 www.cecinc.com
2 1 P a g e

Photo Number: 5
Date: 3/4/2021
Description:
4 Individual plant observed at observation
location number 7.
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I
Photo Number: 6
Date:
Description:
Civil & Environmental Consultants, Inc.
Charlotte,NC
Phone [phone] • Toll Free: 855/859-9932 www.cecinc.com
3 1 P a g e