20200101 Ver 1_Impact maps_20200131

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Engineering Planning
Site Design
I750 SE MA YNARO ROAD
SUITE'
UITE 160
CARP, NC 27511
19191467-9708
C-0319
CHANNEL & RIPARIAN IMPACT MAP
FOR
Leith Administration Building
SUPPLEMENT SHEET
WAKE COUNTY, NORTH CAROLINA
SCALE 1" = 300' January 31, 2020

UPSTREAM TEMPORARY IMPACT IS TO-
FACIL I FA TE THE COFFER DAM AND DI VERSION
AND/OR PUMP AROUND TO MA IN FAIN
'WORK IN THE DRY'.
i
4 PROP. RETAINING
J WALL #1
N + i
* +++
r� XPROP. RETAINING + + + ++++ + +++ S�R
WALL #2 + + + + + + + / �'
+ + + + + + /// _� 30
w __
+ +++ + +
�\ + +*+*++* ++ /, / / PROP. COFFER DAM
WITH DIVERSION/
PUMP AROUND
++ ++
temporary impact
8 LF - CHANNEL
131 SF - CHANNEL
PROP. DOUBLE /
++ + +y+ F + ++ 30" RCP CULVERTS
1+ + f + �+ +++++++ + • + /
r + + + + + + + + + /
S3 14 LF - CHANNEL * +++ + + i
C 239 SF -CHANNEL �+ * + + *+*+*+ "* +*
%
-PROP. CLASS I V + + + + * * + + + +
RIP RAP & FABRIC + + +
UNDERLINER /
20' zo/vE PROP. DIVERSION/ /
PUMP AROUND /
IMPACT AREA 1
LO -� �/ 40 LF - CHANNEL
/ zJ 604 SF - CHANNEL
4,054 SF - ZONE 1 BUFFER
B1
2,639 SF - ZONE 2 BUFFER
0 SF - WETLANDS
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Engineering Planning
Site Design
1150 SE MA YNARO ROAD
SUITE 160
CARP, NC 27511
19191467-9708
C-0319
CHANNEL & RIPARIAN IMPACT MAP
FOR
Leith Administration Building
IMPACT 1
WAKE COUNTY, NORTH CAROLINA
SCALE 1" = 30' January 31, 2020
SHEET 2 OF 8

TOP OF WALL
230
230
FILL SLOPE
FILL SLOPE
225
225
220
EX.
GRADE
EX.
GRADE
220
PROPOSED DOUBLE
30" RCP CULVERTS
CULVERT #1 @
8" BELOW
STREAMBED
INVERT: 219.63
CULVERT #2 @
STREAMBED
INVERT: 220.30
10+00 10+50
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soc.
Engineering Planning CHANNEL & RIPARIAN IMPACT MAP
Site Design FOR
1150 5£ MA YNARD ROAD
S)467-90 Leith Administration Building
£ARY, NC 27511
l919/ 467-9708
IMPACT 1 SECTION A A'
SCALE 1" = 20' HORIZ. WAKE COUNTY, NORTH CAROLINA
SCALE 1" = 4' VERT.
SHEET 3 OF 8

PROP
ROAD GRADE
230
PROP
WALL
230
PROP
WALL
225
1
225
220
CULVERT #2 @
STREAMBED
220
CULVERT #2 @
STREAMBED
CULVERT #1 @
8" BELOW
STREAMBED1 3
PROP DBL. 30" RC
39 @ 0.60 /o
CH_AN_NE
_----
EX. CHA
N - -- ----
------------------------------
4 CLASS I RIP RAP
WITH GEOTEXTILE
FABRIC UNDERLINER
---- ----
-- - --
--------
CULVERT #1 @
8" BELOW
STREAMBED
10+00 10+50
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Engineering Planning CHANNEL & RIPARIAN IMPACT MAP
Site Design FOR
1150 SE MA YNARD ROAD
5TE 0 Leith Administration Building
(ARY, NC 27511
1
9/9)467-9467-9708
IMPACT 1 SECTION B B'
SCALE 1" = 20' HORIZ. WAKE COUNTY, NORTH CAROLINA
SCALE 1" = 4' VERT.
SHEET 4 OF 8

l I 100,
/ j lii/ r I
EX. OVERHEAD
ELECTRIC EASEMENT
301 I20
� SIN
0
Oz
m` it
++.+..
II
I�
I�
I I
I�
I�
I
I,
\-EX. 50' RIPARIAN
BUFFER (TYP)
1
PROP. 30"
RCP OUTLET
1
\ 1
1 �
1—�
I
EX. 50' RIPARIAN
BUFFER (TYP)
IMPACT AREA 2
20 LF - CHANNEL
197 SF - CHANNEL
/� — - : t \ �{ 610 SF - ZONE 1 BUFFER
�� 402 SF - ZONE 2 BUFFER
0 SF - WETLANDS
EA/ EX. OVERHEAD
/ELECTRIC LINE
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Engineering Planning
Site Design
1150 SE MA YNARD ROAD
SUITE260
CARY, NC 275"
1919)467-9700
C-0329
Imp.
MEN
►.q'i
..� 0
CHANNEL & RIPARIAN IMPACT MAP
FOR
Leith Administration Building
I M PACT 2
WAKE COUNTY, NORTH CAROLINA
SCALE 1" = 30' January 31, 2020
1
Ij
1
SHEET 5 OF 8

SCALE 1" = 30'
EX. 50' RIPARFAN
BUFFER (TYP)j
N
9
I m PROP.30"
RCP OUT T I ti
3�
JB B
PROP RIP RAP V
'CLASS I WITH
GEO-TEXTC UNI LE
FABRIC
225
225
fX.
EX• GRADE
Ll
220
\
/
PROP 30"
RCP
220
FES A INV:
219.55
EXCAVATED VOLUME: 8.9 CY ----�
(ORDINARY HIGH WATER MARK
IS 6" ABOVE CHANNEL BOTTOM)
RIP
RAP CLASS
I WITH GEO-TEXTILE
UNDERLINER
215
215
10+ 00
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saviecfit a
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Engineering Planning
Site Design
SCALE 1" = 20' HORIZ.
SCALE 1" = 4' VERT.
10+50
11 +00
CHANNEL & RIPARIAN IMPACT MAP
FOR
Leith Administration Building
IMPACT 2 Section A - A'
WAKE COUNTY, NORTH CAROLINA
SHEET 6 OF 8

rAl
100,
/ )I EX. OVERHEAD
ELECTRIC EASEMENT
I
, /�
20 BUFFER (TYP)IAN
o
PROP.18"
RCP OUTLET /
+ + + + 1
+ + ++ i
PROPOSED
BIORETENTION
Scm
IMPACT AREA 3
{ 124 SF - CHANNEL /
622 SF - ZONE 1 BUFFEREX 50'
I i RIPARIAN B31 406 SF - ZONE 2 BUFFER
BUFFER (TYP) 0 SF - WETLANDS
I
EX. OVERHEAD ELECTRIC LINE
i
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nie
Engineering Planning
Site Design
1150 SE MA YNARO ROAD
SUITE 160
CARP, NC 27511
19191467-9708
C-0319
CHANNEL & RIPARIAN IMPACT MAP
FOR
Leith Administration Building
IMPACT 3
WAKE COUNTY, NORTH CAROLINA
SCALE 1" = 30' January 31, 2020
SHEET 7 OF 8
Z

SCALE 1" = 30'
PROP RIP RAP
CLASS I WITH
G OTEXTILE
FABRIC UNDERLINER
PROP.30" / C
FRCP OUTLET
o
A/� � X. 50' RIPARIAN
BUFFER (TYP)
225
225
�RPpE
EX�
220
- EX.
-
GRgDE
-
220
-,
PROP
18 RCP
i'
FES
A INV: 219.55
215
EXCAVATED
(ORDINARY
IS 6" ABOVE
VOLUME:
HIGH
CHANNEL
4.5 CY
WATER MARK
BOTTOM)
-----' "
215
RIP
RAP CLASS
I WITH
GEO-TEXTILE
UNDERLINER
10+ 00
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saviecfit a
co
Engineering Planning
Site Design
SCALE 1" = 20' HORIZ.
SCALE 1" = 4' VERT.
10+50
11 +00
CHANNEL & RIPARIAN IMPACT MAP
FOR
Leith Administration Building
IMPACT 3 Section A - A'
WAKE COUNTY, NORTH CAROLINA
SHEET 8 OF 8